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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 31. Отображено 31.
30-06-2023 дата публикации

Standby capacity configuration method and equipment for wind-light-storage combined system

Номер: CN116365589A
Автор: QIAN CONGCONG, MENG GAOJUN, YU LINLIN, ZHANG YANGFEI, RAO YUFEI, LIU HAITAO, YUAN YE, XIA TAO
Принадлежит:

The invention discloses a reserve capacity configuration method for a wind-light-storage combined system, and the method comprises the steps: generating a typical scene of new energy prediction output clustering based on an improved K-means clustering algorithm according to the new energy prediction output data of the wind-light-storage combined system in a certain region; determining a new energy prediction output reserve safety inclusion coefficient of the typical scene through a calculation method of the new energy prediction output reserve safety inclusion coefficient and a power supply loss risk rate constraint; and according to the new energy prediction output data and the pumped storage reservoir capacity of the next time period, calculating a new energy standby safety inclusion coefficient of the wind-light-storage combined system based on pumped storage coordination, and solving the standby configuration capacity of the new energy output prediction cluster. According to the method ...

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Номер записи: 1
13-08-2014 дата публикации

Micro grid optimal power factor compound control method of wave power generation system

Номер: CN103986381A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a micro grid optimal power factor compound control method built of a wave power generation system. The d-axis current and speed composite control technology of the optimal power factor compound control technology is adopted, and meanwhile in order to meet rotor position information required by the system, a sliding mode observer, a reference model normalization method and a fuzzy controller are combined together for motor control. The EOUC method is adopted to control the wave power generation system, the d-axis current and speed composite control technology of the optimal power factor compound control technology is adopted, meanwhile in order to meet the rotor position information required by the system, the sliding mode observer and the reference model normalization method are combined together, the accurate and reliable motor rotor position and speed information can be provided for the wave power generation system accurately and effectively, according to the control ...

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Номер записи: 2
19-11-2014 дата публикации

Driving control system of power robot

Номер: CN104158455A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a driving control system of a power robot. A direct torque control system is adopted for a driving device, the magnitude value of stator flux linkage is calculated by the adoption of a state equation, and meanwhile based on a neutral point clamped type three-level inverter, a position recursive control algorithm is provided for replacing a position sensor technology and used for finally obtaining the position and speed information of a robot driving motor (PMSM). The method for calculating the magnitude value of the stator flux linkage through the state equation, the direct torque control system, the neutral point clamped type three-level inverter and the position recursive control algorithm are combined, so that the performance of the novel driving control system of the power robot is improved, and the position and speed information of a transformer substation patrol robot is accurately and effectively detected.

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Номер записи: 3
30-06-2023 дата публикации

New energy power grid frequency modulation energy storage demand configuration method based on singular spectrum analysis

Номер: CN116365549A
Автор: ZHANG JILONG, MENG GAOJUN, YU LINLIN, ZHANG YANGFEI, RAO YUFEI, HUANG JIAYAO, YUAN YE, XIA TAO
Принадлежит:

The invention discloses a new energy power grid frequency modulation energy storage demand configuration method based on singular spectrum analysis, and the method comprises the steps: taking a new energy output and load superposed net load in a new energy power grid as a multi-component non-stationary signal; the multi-component non-stationary signal is decomposed based on multiple superposition singular spectrums improved by a singular spectrum analysis method to obtain net load fluctuation quantity components of different scales, and the frequency modulation capacity demand and the frequency modulation rate demand of the new energy power grid are solved by combining the net load prediction deviation component; and respectively taking the frequency modulation capacity demand and the frequency modulation rate demand of the new energy power grid as the input of the XGBoost model, obtaining the energy storage frequency modulation power demand and the energy storage frequency modulation energy ...

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Номер записи: 4
10-12-2014 дата публикации

Clamping-type three-phase voltage-source type inverter and control method thereof

Номер: CN104201922A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention relates to a clamping-type three-phase voltage-source type inverter and a control method thereof and belongs to the technical field of three-phase voltage-source type inverters. The clamping-type three-phase voltage-source type inverter comprises a direct-current power source, a three-phase three-level inverter bridge, a three-phase LC filter and a three-phase load. In order to control output voltage waveforms, a mathematical model of the three-level inverter is established, an instantaneous value control system of the output voltage is put forward, a scheme combining a fundamental-wave disturbance instantaneous value controlled internal model with a harmonic disturbance repetitive controlled internal model under rotating coordinates is adopted, disturbance of the internal models is realized to acquire voltage output waveforms high in quality by adopting structural controllers in parallel, and a control method for fixing resultant vectors is adopted with an aim to solve problems ...

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Номер записи: 5
10-12-2014 дата публикации

Method for suppressing velocity fluctuation of flux-switching linear motor

Номер: CN104201964A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a method for suppressing velocity fluctuation of a flux-switching linear motor. The method includes inputting harmonic current to compensate thrust fluctuation caused by positioning force; compensating thrust fluctuation caused by uncertainties such as friction and parametric variations via a disturbance observer, so that the thrust fluctuation is further weakened. The method can effectively suppress positioning force and velocity fluctuation.

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Номер записи: 6
27-08-2014 дата публикации

Electric generator control method based on power factor correction and rectification algorithm in micro grid construction

Номер: CN104009694A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a permanent magnetic wind electric generator control method based on a power factor correction and rectification algorithm in micro grid construction. A three-phase PMSG is controlled through a PFC method, and in order to meet the requirement for rotor position information needed in the control, an original position di/dt detection method, a rotation high-frequency voltage injection method and a double-salient-pole decoupling observer are combined. The three-phase PMSG is controlled through the PFC method, the original position di/dt detection method, the rotation high-frequency voltage injection method and the double-salient-pole decoupling observer are combined to accurately and effectively provide accurate and reliable rotor position information to current control of the PMSG, so that current harmonic content is reduced, power factors in the PMSG approach 1, direct-current output is maintained, and good control of the PMSG based on the PFC method is achieved.

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Номер записи: 7
13-08-2014 дата публикации

Wave power generation system position detecting method in micro-grid establishing

Номер: CN103986399A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a wave power generation system position detecting method in micro-grid establishing. The dipulse nonlinearity voltage exerting method, a sliding-mode observer, a fuzzy controller and a salient pole effect tracking observer are combined. The sliding-mode observer is used for acquiring rotor position information. Firstly, the sliding-mode observer is used for estimating counter electromotive force (EEMF) of a permanent magnet synchronous generator (PMSG); secondly, a sliding film plane is formed through errors between the actual measurement current and the observing current to observe the EEMF, and the rotor position is accurately obtained. The fuzzy controller is used for replacing a traditional switch function Z, the equivalent EEMF is obtained to obtain the detecting value of the rotor position, and the error produced by low pass filter phase lag is compensated to reduce the observing error. The salient pole effect tracking observer is adopted. The initial position ...

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Номер записи: 8
20-08-2014 дата публикации

High-performance control method of electric robot driving system

Номер: CN103997269A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a high-performance control method of an electric robot driving system. A non-position ring, a speed control ring, a current control ring, a fuzzy controller, an R-PI adjuster and the switching-type SVPWM technology are combined together to control a driving motor of an electric robot. According to the high-performance control method, the stability, the accuracy and the dynamic response capacity of the electric robot driving system are improved, and meanwhile, the position-sensorless technology is achieved.

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Номер записи: 9
20-08-2014 дата публикации

Position-sensor-free control method for transformer substation patrol robot

Номер: CN103997268A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a position-sensor-free control method for a transformer substation patrol robot. The method comprises the steps that before the robot is started, voltage pulses are applied to a driving motor of the robot two times, a responsive inductance value is solved according to the current change rate detected by a current sensor, and then the rotor position angle of the driving motor before starting of the robot is obtained by combining a judgment method of a motor rotor magnetic pole according to the function relation of the motor position angle and the inductance value. After the robot operates, motor drive is based on the SVPWM control technology, three different voltage vectors exist in the PWM period of every time, the voltage vectors correspond to different phase current change values, counter electromotive force is obtained by measuring the phase current change values corresponding to the different voltage vectors and combining voltage values, and finally the active ...

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Номер записи: 10
15-10-2014 дата публикации

Flux-switching linear motor based rail transit velocity fluctuation inhibition method

Номер: CN104104297A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a flux-switching linear motor based rail transit velocity fluctuation inhibition method. Metro vehicles can operate in variable speeds and constant speeds during operation; in order to achieve the purpose of inhibiting positioning forces and velocity fluctuation, when the metro vehicles operate in variable speeds, a novel control strategy that a method of a position x-domain repetitive controller in combination with an R-PI regulator is used to inhibit the positioning forces is provided, wherein the method comprises the steps that firstly, a time-varying t-domain signal is converted into an x-domain signal with a fixed cycle, and the x-domain signal is subjected to designing of the repetitive controller; when the metro vehicles operate in constant speeds, the method of a time t-domain repetitive controller in combination with the R-PI regulator is used; meanwhile, in order to accurately obtain position and speed information of a linear flux-switching permanent magnet ...

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Номер записи: 11
16-04-2014 дата публикации

Method for detecting initial position of rotor of wind turbine system

Номер: CN103731083A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a method for detecting the initial position of a rotor of a wind turbine system. The method comprises the steps that firstly, the line current peak value is detected and according to the line current peak value, the initial position of the rotor is initially determined, and the polarity of a rotor magnetic pole is judged. According to the method for detecting the initial position of the rotor of the wind turbine system, the initial position of the rotor of a motor of a wind driven generator can be quietly accurately detected and the motor can be smoothly started; the implementation process is simple, any motor parameter is not needed, the measurement result is accurate, and the engineering practical value is quite high.

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Номер записи: 12
24-09-2014 дата публикации

Composite quench protection circuit suitable for superconducting magnet

Номер: CN104065037A
Автор: YU HAITAO, DONG KUN, HU MINQIANG, HUANG LEI, WEN CHENG, ZHONG WEIBO, MENG GAOJUN
Принадлежит:

The present invention discloses a composite quench protection circuit suitable for a superconducting magnet. The quench protection is carried out on the superconducting magnet by designing an automatic quench protection loop, an overvoltage protection loop, a sensitive protective circuit and an automatic energy transfer type energy releasing loop. According to the composite quench protection circuit suitable for the superconducting magnet provided by the present invention, the physical mediums of loops are independent, do not interfere with one another, and can be combined together effectively to form the multi-angle and multi-layer composite quench protection, thereby having the advantages of fast response, strong stability, high sensitivity, etc. With the application of an electromagnetic type voltage relay and a current relay, a technology of relay protection is fused with a quench phenomenon, thereby improving the sensitivity and accuracy of the quench protection action. The energy ...

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Номер записи: 13
19-11-2014 дата публикации

Non-position sensing control method for electric vehicle drive motor

Номер: CN104158456A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a non-position sensing control method for an electric vehicle drive motor. The method comprises the steps of using a pulse voltage injection method for detecting an initial position of a drive motor rotor before an electric vehicle is started; and in order to conduct accurate detection, using a rotary high-frequency voltage injection method at a low speed section for real-time detection of the position of the drive motor rotor after the electrical vehicle is started; in order to avoid multiple salient pole effects of a motor, adding a double salient pole decoupling observer onto a structure of the high-frequency voltage injection method, at an intermediate speed, combining the high-frequency injection method and the counter electromotive force method and through a neural network controller to process and detect the position of the drive motor rotor, and at a high speed, using the counter electromotive force method to detect the position of the drive motor rotor; ...

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Номер записи: 14
10-12-2014 дата публикации

Sub-module capacitance voltage balance control method for three-phase modular multilevel converter applicable to VSC-HVDC (voltage source converter-high voltage direct current)

Номер: CN104201910A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a sub-module capacitance voltage balance control method for a three-phase modular multilevel converter applicable to VSC-HVDC (voltage source converter-high voltage direct current) and belongs to the technical field of level converters. The three-phase modular multilevel converter comprises three phase units and a first voltage capacitor, each phase unit comprises two bridge arms which are parallelly connected, and each bridge arm comprises an electric reactor and N sub-modules. The sub-module capacitance voltage balance control method includes: firstly, well setting switching frequency of the sub-modules; secondly, determining triggering state of the sub-modules according to changes of modulating waves, adjusting charging and discharging time, and realizing capacitance voltage balance of the sub-modules in the bridge arms. By the method, stability of direct-current voltage and dynamic adjustment of power can be guaranteed, and consumption of the sub-modules is minimized ...

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Номер записи: 15
11-07-2023 дата публикации

Wind-light-pumped storage system joint scheduling optimization method, storage medium and equipment

Номер: CN116418047A
Автор: TANG YUN, MENG GAOJUN, YU LINLIN, ZHANG YANGFEI, RAO YUFEI, ZHA YUNLONG, YUAN YE, XIA TAO
Принадлежит:

The invention discloses a wind-light-pumped storage system joint scheduling optimization method, a storage medium and equipment, and the method comprises the steps: collecting the latest meteorological information of a wind power plant and a photovoltaic power station in a certain region, carrying out the normalization processing, inputting the information into an ELM model improved through a papilionet optimization algorithm, and carrying out the optimization of the ELM model, predicting new energy output of the wind power plant and the photovoltaic power station; constructing a dynamic model of a pumped storage power station reservoir through an adaptive reverse correction algorithm, collecting rainfall and temperature information of the pumped storage power station, inputting the rainfall and temperature information into the dynamic model, and predicting the water level of the reservoir; and according to the predicted new energy output and the water level of the water storage reservoir ...

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Номер записи: 16
19-11-2014 дата публикации

Two-way DC/DC converter for micro-grid and magnetic bias digital suppression method

Номер: CN104158405A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a two-way DC/DC converter for a micro-grid and a magnetic bias digital suppression method. A working mode of phase-shifting type full-bridge two-way DC/DC topology for the micro-grid is analyzed in detail, the deduction process of transmission power is provided, the possibility of two-way energy flow is introduced, the principle of digital control over magnetic bias suppression is explained, a digital compensation method capable of effectively achieving magnetic bias suppression is provided, a phase-shifting method in a DSP is provided, the problems that efficiency is reduced and the duty ratio is decreased are effectively solved with the method, meanwhile, additional hardware is not added, converter digital PWM control algorithm current rings and voltage rings are adjusted through a PI adjuster, direct currents are sampled in order to eliminate influences caused by peak currents and the like, and the direct currents are filtered through a two-order analog low-pass ...

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Номер записи: 17
27-08-2014 дата публикации

Method for detecting position information of patrol robot of transformer substation through mixed observation device

Номер: CN104009697A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a method for detecting position information of a patrol robot of a transformer substation through a mixed observation device. The method combines an initial position detection closed-loop control system, the mixed observation device, a model reference normalization algorithm, a fuzzy controller and a salient pole effect compensating controller to detect rotor position and velocity information of the patrol robot of the transformer substation accurately and effectively. The method can detect position and velocity information of the patrol robot of the transformer substation accurately and effectively.

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Номер записи: 18
14-04-2023 дата публикации

Quantitative relation analysis method and system for energy storage scale and effective output of new energy station

Номер: CN115967106A
Автор: JIANG XIAOLIANG, XING PENGXIANG, MENG GAOJUN, MAO YUBIN, ZHANG JING, JIA PENG, LI TIANTIAN, YAN XINTONG, WANG YANG, CHEN SHUYU
Принадлежит:

The invention discloses an energy storage scale and new energy station effective output quantitative relation analysis method and system, and the method comprises the steps: constructing a wind power historical output characteristic evaluation system, and correcting the data in the wind power historical output characteristic evaluation system through a multiple data detection method; performing dimension reduction clustering on the data in the corrected wind power historical output characteristic evaluation system to generate typical output characteristic operation data; and according to the typical output characteristic operation data and the energy storage scale, calculating a stabilizing fluctuation rate, a new energy output peak-valley difference reduction rate and a system peak-valley difference reduction rate, determining each change rate weight by using an optimal weight coefficient method, and quantitatively evaluating the relationship between the energy storage scale and the effective ...

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Номер записи: 19
10-12-2014 дата публикации

Three-phase modularized multi-level converter for VSC-HVDC (voltage source converter-high voltage DC) and carrier phase-shifting modulation method of converter

Номер: CN104201909A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a three-phase modularized multi-level converter for VSC-HVDC (voltage source converter-high voltage DC) and a carrier phase-shifting modulation method of the converter and belongs to the technical field of level converters. The three-phase modularized multi-level converter comprises three phase units and a first voltage capacitor, and two of the phase units are connected with each other at first and connected with the first voltage capacitor and the rest phase unit in parallel; each phase unit comprises two bridge arms connected in parallel, each bridge arm comprises a reactor and N submodules. For N+1-level three-phase modularized multi-level converter, each bridge arm comprises N cascade submodules, N groups of two-level triangular carriers are adopted and phases thereof are sequentially staggered by 2 pi/N degrees. The three-phase modularized multi-level converter cannot generate extra switching loss and loss of the converter caused by power devices can be conveniently ...

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Номер записи: 20
20-08-2014 дата публикации

Transformer substation patrol robot position detecting method based on high-frequency injection method

Номер: CN103997263A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a transformer substation patrol robot position detecting method based on a high frequency injection method. According to the method, an initial position tracking closed-loop control system, a rotating high frequency voltage injection method, a PMSM inductance identification model, a multiple-salient-pole decoupling observer and a rotor position anti-interference observer are combined together to conduct rotor position angle detection. By means of the transformer substation patrol robot position detecting method based on the high frequency injection method, the smooth starting of the transformer substation patrol robot PMSM is achieved, and precise, effective and real-time detection of the rotor position information of the transformer substation patrol robot PMSM can be achieved.

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Номер записи: 21
06-06-2023 дата публикации

Secondary frequency modulation-oriented energy storage power station auxiliary power grid frequency modulation method

Номер: CN116231684A
Автор: LI JIE, MENG GAOJUN, YU LINLIN, ZHANG YANGFEI, RAO YUFEI, LIU HAITAO, YUAN YE, XIA TAO
Принадлежит:

An energy storage power station auxiliary power grid frequency modulation method oriented to secondary frequency modulation belongs to the technical field of power system energy storage frequency control methods, and comprises the following steps: acquiring an ACE (Area Control Error) signal in real time, when the ACE signal exceeds a value set by a dead zone, enabling battery energy storage to participate in secondary frequency modulation, otherwise, enabling the battery energy storage to carry out SOC (State Of Charge) adaptive adjustment, the method comprises the following steps: acquiring ACE signals, acquiring Area Regulation Request (ARR) signals according to the ACE signals, acquiring a battery energy storage SOC state and frequency deviation delta f, selecting a control mode according to a mode switching criterion table, establishing a maximum efficiency charging and discharging model of a battery energy storage unit group, constructing a target function with minimum power loss ...

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Номер записи: 22
15-10-2014 дата публикации

Cogging force suppression method for flux-switching linear motor

Номер: CN104104298A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a cogging force suppression method for a flux-switching linear motor, which is used for realizing the purpose of suppressing a cogging force and velocity fluctuation by a novel repetitive controller and a position recursive control algorithm, and realizing a position-free sensing technology simultaneously. According to the cogging force suppression method, a time-varying t-domain signal is converted to an x-domain signal with a fixed period, and then the design of the repetitive controller is carried out on the x-domain signal, thus achieving the purpose of suppressing a cogging force and velocity fluctuation; meanwhile, in order to accurately obtain the position and velocity information of LFSPM, the invention puts forward that the position recursive control algorithm is used for replacing a position sensing technology simultaneously, thus the rotor position information of the flux-switching linear motor can be accurately and effectively detected in real time.

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Номер записи: 23
27-08-2014 дата публикации

Non-position sensing control method for electromagnetic launch

Номер: CN104009685A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a non-position sensing control method for electromagnetic launch. Before a motor is started, a high-frequency low-voltage injection method is adopted, and the phase current response peak values of a U phase, a V phase and a W phase are detected respectively, trigonometric function changing is conducted on the phase current response peak values, and then the initial position of a rotor is calculated; a grating ruler is used for conducting position signal detection at a low-speed section, and a back electromotive force method based on the PWM modulation technology is adopted for detecting the position of the rotor at a medium speed section and a high speed section; in a low-speed and medium speed conversion section, a PI adjustor is adopted, the difference between the position signal detected by the grating ruler and the position signal detected by the back electromotive force method serves as the input of the PI adjustor, and after adjustment is conducted, the position ...

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Номер записи: 24
26-11-2014 дата публикации

Position sensor-free control method used for sea wave power generation system

Номер: CN104167969A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a position sensor-free control method used for sea wave power generation system. A double-pulse nonlinear voltage applying method, a sliding-mode observer, a neural network controller and a rotor position anti-interference observer are combined; the sliding-mode observer is adopted to obtain rotor position information, firstly the sliding-mode observer is adopted to estimate back electromotive force (EEMF) of a permanent magnet synchronous generator (PMSG), and then a sliding film plane is formed through an error between measured current and observed current to observe EEMF, thereby accurately obtaining the rotor position; at the same time, the neural network controller is adopted to replace a conventional switch function Z, equivalent EEMF is obtained, thereby obtaining a rotor position detection value, and to reduce an observation error, an error generated by a phase lag of a low pass filter is compensated; the rotor position anti-interference observer is designed ...

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Номер записи: 25
07-05-2014 дата публикации

Method for detecting initial position of rotor of power robot

Номер: CN103780193A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a method for detecting the initial position of a rotor of a power robot. The method comprises the steps of firstly exerting three high-frequency low-voltage pulses on a motor by controlling a driving circuit, utilizing an average current oblique differential method for calculating wire inductance values Lab, Lbc and Lac, comparing the inductance values Lab, Lbc and Lac to determine the section of the position angle of the rotor, controlling an inverter to exert a high-frequency low-voltage pulse again according to the section of the position angle of the rotor, selecting the three optimal detection values in the four current peak value detecting processes for rotational coordinate transformation, and finally determining the initial position angle of the rotor. The method for detecting the initial position of the rotor of a permanent magnet synchronous motor can detect the initial position of the rotor of the permanent magnet synchronous motor quite accurately, and ...

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Номер записи: 26
15-10-2014 дата публикации

Control method capable of improving electric energy quality of microgrid system

Номер: CN104104111A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
Принадлежит:

The invention discloses a control method capable of improving the electric energy quality of a microgrid system. According to the control method, the purposes of maintaining a constant direct-current voltage, compensating the reactive power of a power grid and suppressing current harmonics are achieved by controlling a grid connection converter and designing an electric energy quality compensator. According to the method disclosed by the invention, a constant direct-current bus voltage can be kept and bus ripple waves are suppressed by adopting a double control strategy of a direct-current bus voltage outer ring and an alpha-beta current inner ring in a GCC control system; the purposes of suppressing harmonic currents and a reactive current can be achieved due to the design of the electric energy quality compensator and adopting a novel control strategy of suppressing the harmonic currents and the reactive current by virtue of the repeated control of a time-varying periodic signal.

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Номер записи: 27
14-04-2023 дата публикации

Multi-time scale energy storage power station frequency modulation control method and system

Номер: CN115967105A
Автор: SI RUIHUA, WANG CHUANJIE, MENG GAOJUN, JIANG XIAOLIANG, LI JIE, XING PENGXIANG, CHENG YUMING, ZHANG LIHUA, LIU WANXUN, SHAO HONGBO
Принадлежит:

The invention provides a multi-time-scale energy storage power station frequency modulation control method, belongs to the technical field of power system energy storage power station frequency control, and provides a primary frequency modulation and secondary frequency modulation coordinated multi-time-scale control technology aiming at the problems that the primary frequency modulation stabilization time of an energy storage system is short and the theoretical value of primary frequency modulation cannot be reached when an accident occurs. After the primary frequency modulation action of the energy storage power station, secondary frequency modulation ACG is started in a delayed mode, and the starting criterion is delta fgt; the frequency is 0.033 Hz; adjusting the SOC of each energy storage unit according to the energy storage charging power prediction, the load power prediction and the corrected next-day scheduling discharging plan; and determining power output of each energy storage ...

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Номер записи: 28
07-05-2014 дата публикации

Method for detecting initial position of rotor of power robot

Номер: CN103780192A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
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The invention discloses a method for detecting the initial position of a rotor of a power robot. The method comprises the steps of firstly exerting three different voltage pulses on a motor by controlling a driving circuit, respectively detecting the phase current response peak values of the phase A/the phase B/the phase C, comparing the phase current peak values of the three phases, initially judging the section where the rotor is located, controlling an inverter to exert a voltage pulse relative to the section again according to the section where the rotor is located, meanwhile, detecting the current peak value of the phase, comparing the current peak value of the phase and the detected current peak value in the first step, selecting the three detection values in the four current peak value detecting processes for triangle function transformation, and finally determining the angle of the initial position of the rotor. The method for detecting the initial position of the rotor of a permanent ...

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Номер записи: 29
01-08-2023 дата публикации

Phase modifier optimization site selection method for new energy power generation cluster

Номер: CN116526500A
Автор: CHANG YUE, MENG GAOJUN, YU LINLIN, ZHANG YANGFEI, RAO YUFEI, LIU HUIXIAN, YUAN YE, XIA TAO
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The invention discloses a phase modifier optimization site selection method for a new energy power generation cluster, and the method comprises the steps: carrying out the apparent power and voltage correction of a power system from the angle of new energy multi-infeed according to an optimization particle swarm algorithm, and building a new energy power generation cluster system improved dynamic model containing a phase modifier; according to the improved dynamic model of the new energy power generation cluster system containing the phase modifier, determining a new energy cluster improved short circuit ratio iSCR based on new energy reactive output, a reactive loss compensation device, an ectopic impedance angle difference and an initial phase angle; and establishing a polymerization model of phase modifier drop point configuration through an improved beetle beetle algorithm of simulated annealing by taking maximized improvement of the improved short-circuit ratio iSCR as a target, and ...

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Номер записи: 30
05-11-2014 дата публикации

Control method for improving power quality of microgrid system

Номер: CN104135026A
Автор: YU HAITAO, MENG GAOJUN, HU MINQIANG, HUANG LEI
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The invention discloses a control method for improving power quality of a microgrid system. The microgrid system comprises a three-phase alternating current grid I, a delta/Y connected three-phase isolation transformer, a three-phase grid-connected converter, a direct current bus voltage udc, a three-phase alternating current grid II and a grid reactive compensator, wherein purposes of keeping direct current voltage constant and compensating reactive power of the grids are achieved by GCC control and the design of the grid reactive compensator. According to the control method, a direct current bus voltage outer loop and alpha and beta current inner loop dual control strategy is adopted by a GCC control system, so that direct current bus voltage can be kept constant and a bus ripple can be restrained; a repetitive controller and PI (Proportional Integral) regulator combined compound control mode is adopted, so that the steady accuracy and the dynamic property of the system can be ensured ...

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Номер записи: 31