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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 19. Отображено 19.
17-12-2014 дата публикации

Novel busbar-free four-port bipolar DC-DC (direct current to direct current) converter

Номер: CN104218796A
Принадлежит:

The invention provides a novel busbar-free four-port bipolar DC-DC (direct current to direct current) converter which comprises an annular architecture. The annular architecture is formed by four converter unit groups in sequential connection; each converter unit group comprises two converter units in connection; each of two power electronic device branches of each converter unit comprises two power electronic devices in same-direction connection; junction points of the power electronic devices are connected through electric reactors. Compared with the prior art, the novel busbar-free four-port bipolar DC-DC converter has a power bidirectional flow capability and is applicable to different operating conditions of a direct-current system, power conversion coefficient is decreased, and power conversion efficiency of the converter is improved.

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23-09-2015 дата публикации

A magnetic force handle that is used for accurate work piece of ferromagnetism to assemble

Номер: CN0204658349U
Принадлежит:

The utility model discloses a magnetic force handle, include two magnetic force actuating mechanism and connect the rotation adjustment mechanism between two magnetic force actuating mechanism, magnetic force actuating mechanism includes magnetic base, intermediate junction board, load arm, elastically positioned mechanism and handle, the magnetic base up end passes through intermediate junction board and load arm rigid coupling, it has the through -hole to open on the intermediate junction board, is equipped with the elastically positioned mechanism that connects the magnetic base up end in the through -hole, one side of handle is connected to the one end of load arm, and the opposite side of handle is equipped with the linking arm that is used for connecting rotation regulation mechanism, rotating adjustment mechanism and including ratchet, pawl, rotation axis and spring, on the ratchet was fixed in a magnetic force actuating mechanism's linking arm, the rotation end of pawl passed through ...

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27-08-2014 дата публикации

Series type tidal current controller suitable for direct current power transmission

Номер: CN104009463A
Принадлежит:

The invention provides a series type tidal current controller suitable for direct current power transmission. The controller comprises a bi-directional DC/DC converter and an H bridge converter connected with the bi-directional DC/DC converter in series. The bi-directional DC/DC converter is connected into a high-voltage direct current power transmission network through direct current breakers, one output branch circuit of the H bridge converter is sequentially connected into the high-voltage direct current power transmission network through a reactor and a direct current fuse protector, and the other output branch circuit of the H bridge converter is directly connected into the high-voltage direct current power transmission network. Compared with the prior art, the series type tidal current controller suitable for the direct current power transmission can control fixed voltage connected inside a direct current transmission line in series in a linear mode when operating in a voltage mode ...

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15-04-2015 дата публикации

Concurrent control process voltage compensating method of energy storage system at tail end of power distribution network

Номер: CN104518511A
Принадлежит:

The invention discloses a concurrent control process voltage compensating method of an energy storage system at the tail end of the power distribution network. The concurrent control process voltage compensating method includes steps of S01, disconnecting network combination point switches and operating the energy storage system in a V/F voltage source mode in the off-network state; S02, detecting whether terminal voltage of the power distribution network is recovered or not, if yes, acquiring the terminal voltage of the power distribution network, and calculating to obtain three-phase voltage amplitude average Ugrid; S03, acquiring microgrid terminal voltage of the network combination point switches and calculating to obtain three-phase voltage amplitude average value Umicro; acquiring in-place terminal voltage of the energy storage system and calculating to obtain three-phase amplitude average value Uabc; S04, compensating voltage reference to obtain voltage control reference value Uref ...

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13-06-2023 дата публикации

Method for quickly judging voltage of mobile energy storage system in power grid fault scene

Номер: CN116256553A
Принадлежит:

The invention relates to a rapid voltage judgment method for a mobile energy storage system in a power grid fault scene. The method comprises the following steps: acquiring a positive sequence voltage vector and a negative sequence voltage vector; converting the positive sequence voltage vector and the negative sequence voltage vector to a two-phase rotation coordinate for decoupling; obtaining a d-axis current loop output, a q-axis current loop output, a d-axis voltage compensation value and a q-axis voltage compensation value of PI adjustment, and calculating a d-axis DC voltage component and a q-axis DC voltage component; filtering the obtained d-axis direct-current voltage component and q-axis direct-current voltage component by using a notch filter to obtain the filtered d-axis direct-current voltage component and q-axis direct-current voltage component; based on the filtered d-axis direct-current voltage component and q-axis direct-current voltage component, judging whether the voltage ...

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26-02-2014 дата публикации

Mixed-liquid-flow energy-storage system with reactive compensation function

Номер: CN103606942A
Принадлежит:

The invention provides a mixed-liquid-flow energy-storage system with a reactive compensation function. The system includes a liquid-flow battery energy-storage system and a supercapacitor group, which are connected through a DC circuit breaker group. The supercapacitor group, a bidirectional DC/AC converter, a boosting transformer, an AC circuit breaker and an AC power grid are connected in order. The liquid-flow battery energy-storage system includes an all-vanadium liquid-flow battery, a sodium-sulfur battery and a zinc-bromine battery. The supercapacitor group is formed by serial or parallel connection of single-body supercapacitors. The single-body supercapacitors are double-electric-layer supercapacitors or electrochemical supercapacitors. Compared with the prior art, the mixed-liquid-flow energy-storage system with the reactive compensation function is capable of improving effectively stability and reliability of power supplying a distributed power generation system.

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15-04-2015 дата публикации

MMC topological structure based hybrid energy storage system

Номер: CN104518518A
Принадлежит:

The invention discloses an MMC topological structure based hybrid energy storage system which comprises a plurality of chemical energy storage batteries, a plurality of capacitors and an MMC topological structure based converter. Each chemical energy storage battery and each capacitor are connected with the converter through submodules, and one end of each submodule is connected with the corresponding chemical energy storage battery or the corresponding capacitor while the other end of each submodule is serially connected in the converter. Preferably, each submodule is a half-bridge submodule consisting of two fully-controlled power components and a capacitor, wherein the two fully-controlled power components are connected serially and then parallelly connected with the capacitor. More preferably, each submodule is a full-bridge submodule consisting of four fully-controlled power components and a capacitor, wherein the four fully-controlled power components are connected serially pairwise ...

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24-09-2014 дата публикации

Micro grid rapid grid connection method based on three-phase independent regulation

Номер: CN104065104A
Принадлежит:

The invention provides a micro grid rapid grid connection method based on three-phase independent regulation. The method comprises the following steps: (1) a grid connection protection controller of a micro grid and a distribution network sends the collected three-phase voltage value of a distribution network side and the state signal of a grid connection circuit breaker to a master power supply controller of a micro grid side, (2) the master power supply controller uses a PI control algorithm to respectively adjust the active power, reactive power and phase parameter of each phase of the micro grid side, (3) the master power supply controller carries out real-time comparison of the voltage parameters of the distribution network side and the micro grid side, and if the comparison result satisfies the synchronous closing judgment condition of a power grid, a closing command is sent to the grid connection circuit breaker. Compared with the prior art, according to the micro grid rapid grid ...

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06-08-2014 дата публикации

Method for controlling high-dynamic properties of high-power bidirectional DC/DC converters

Номер: CN103973105A
Принадлежит:

The invention provides a method for controlling high-dynamic properties of high-power bidirectional DC/DC converters. The method includes steps of enabling a controller to receive constant-voltage control instructions and constant-voltage control instruction values and acquiring AD (analog-digital) sampled voltage feedback values; changing PI (proportion and integration) control parameters of outer voltage loops when low fluctuating power is outputted by a DC/DC converter and determining current instructions outputted by closed voltage loops under PI control; changing PI parameters of the outer voltage loops according to voltage difference values when the DC/DC converter is subjected to high-power charge and discharge conversion, and outputting the current instructions; changing integration items of inner current loops according to state switching directions when working modes of the DC/DC converter are switched over; transmitting PWM (pulse width modulation) driving signals according to ...

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27-08-2014 дата публикации

Mobile energy storage system for dual power supply

Номер: CN104009490A
Принадлежит:

The invention relates to a mobile energy storage system for dual power supply. The mobile energy storage system comprises an energy storage battery, an energy storage current converter cabinet, a direct current converter cabinet, a UPS, a first AC/DC switching power source, a first DC/DC switching power source, a second AC/DC switching power source and a second DC/DC switching power source. The output end of the energy storage battery is respectively connected to the input end of the first DC/DC switching power source and the input end of the second DC/DC switching power source. The output end of the first AC/DC switching power source and the output end of the first DC/DC switching power source are respectively connected with the input end of the energy storage current converter cabinet. The output end of the energy storage current converter cabinet is connected with the input end of the UPS, and the output end of the UPS is respectively connected with the input end of the first AC/DC switching ...

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17-12-2014 дата публикации

Unipolar-bipolar convertible direct-current converter

Номер: CN104218805A
Принадлежит:

The invention provides a unipolar-bipolar convertible direct-current converter comprising a unipolar side power module and a bipolar side power module connected to two sides of a medium-frequency transformer. The unipolar side power module comprises a first power electronic device full-bridge circuit, a voltage stabilizing capacitor and a direct-current breaker; two ends of the power electronic device full-bridge circuit are connected with the medium-frequency transformer; other two ends of the power electronic device full-bridge circuit are connected with a unipolar direct-current system; the bipolar side power module comprises a second power electronic device full-bridge circuit, a capacitor, a voltage stabilizing capacitor, a reactor and a direct-current breaker; two ends of the second power electronic device full-bridge circuit are connected with the medium-frequency transformer, and other two ends of the second power electronic device full-bridge circuit are connected with a bipolar ...

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17-12-2014 дата публикации

Output voltage positive and negative polarity inversion method based on modular multilevel converter

Номер: CN104218808A
Принадлежит:

The invention provides an output voltage positive and negative polarity inversion method based on a modular multilevel converter. The method includes 1, constructing a modular multilevel converter module; 2, inverting the output voltage positive and negative polarities by adjusting the bridge voltage of the modular multilevel converter module; modulating the upper bridge voltage uu and lower bridge voltage ul of each phase, according to a bridge voltage wave image, into sine wave voltage symmetrical about a horizontal line U = UN/2 vertically, and allowing that the LCC terminal output voltage ULCC = UN; modulating the upper bridge voltage uiu and lower bridge voltage uil of each phase into sine wave voltage symmetrical about a horizontal line U = -UN/2 vertically, and allowing that the LCC terminal output voltage ULCC = -UN. Compared with the prior art, the method has the advantages that the operation requirements of LCC-HVDC and VSC-HVDC interface converters are met, and LCC-HVDC and VSC-HVDC ...

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13-08-2014 дата публикации

Energy storage converter parallel operation optimizing control method in three-phase imbalance system

Номер: CN103986174A
Принадлежит:

The invention provides an energy storage converter parallel operation optimizing control method in a three-phase imbalance system. The method includes the following steps that a three-phase voltage actual measurement effective value, a three-phase active power value and a three-phase reactive power value of an energy storage converter in parallel operation are calculated; a three-phase frequency set value and a three-phase voltage effective set value of the energy storage converter in parallel operation are calculated; active power and reactive power of all phases of the energy storage converter in parallel operation are balanced by adjusting the output frequency and voltage of each phase. The energy storage converter parallel operation optimizing control method in the three-phase imbalance system solves the problems that the voltage and frequency of the energy storage converter are not balanced and currents of the energy storage converter are not distributed evenly in multi-machine parallel ...

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05-11-2014 дата публикации

Voltage optimization control method of off-grid energy storage converter based on compound control

Номер: CN104135021A
Принадлежит:

The invention provides a voltage optimization control method of an off-grid energy storage converter based on compound control. The optimization control method comprises the steps of summing outputs of repetitive control and PID (Proportion Integration Differentiation) control as a control signal of the energy storage converter, allowing the PID control to adjust a deviation of an effective value of voltage, obtaining PID control quantity, allowing the repetitive control to adjust a deviation of actual output voltage and analog sinusoidal voltage of the energy storage converter, and obtaining repetitive control quantity. The method solves the problem of poor power quality of a power supply system caused by non-linear load connection, and improves the power quality of the power supply system during off-grid operation of the energy storage converter.

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15-04-2015 дата публикации

Direct current source coordination controller and direct current converter parallel connection control method thereof

Номер: CN104518509A
Принадлежит:

The invention discloses a direct current source coordination controller which comprises an information collecting module, a power calculating module, a control parameter setting module and a coordination control module. The information collecting module is respectively in communication connection with the power calculation module and the control parameter setting module. The power calculation module and the control parameter setting module are both in communication connection with the coordination control module. The information collecting module and the coordination control module are both externally connected with direct current sources. The invention further discloses a method for using the direct current source coordination controller to control direct current converter parallel connection. The direct current source coordination controller has the advantages that the controller acquires real-time power and sets a boundary value by collecting the capacities, protecting parameters, limit ...

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08-04-2015 дата публикации

Voltage fault monitoring system and method for electron irradiation accelerator

Номер: CN104502742A
Принадлежит:

The invention discloses a voltage fault monitoring system and method for an electron irradiation accelerator. The system comprises n voltage detectors which are used for detecting the voltages of n to-be-measured points, and also comprises a communication node network and a database. The communication node network consists of n communication node network units and one network access point unit, thereby forming a star-shaped topological structure. The n communication node network units are connected with the network access point unit in a mode of wireless communication. The network access point unit is connected with the database through a network line. The input ends of the n voltage detectors are respectively connected with n voltage to-be-measured points in the accelerator, so as to collect the voltages of the to-be-measured points. The output ends of the n voltage detectors are respectively connected with n communication node units. According to the data in the database and a preset ...

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30-12-2015 дата публикации

Light stores up integrated device suitable for distributing type electricity generation

Номер: CN0204928192U
Принадлежит:

The utility model provides a light stores up integrated device suitable for distributing type electricity generation, including photovoltaic unit, energy storage battery unit and the unit that is incorporated into the power networks, the photovoltaic unit is including the photovoltaic module, first fuse group, first direct current preliminary filling circuit, a LC wave filter and the BOOSTBUCK circuit that connect gradually, the energy storage battery unit is including the energy storage battery, second fuse group, a EMI wave filter and the second direct current preliminary filling circuit that connect gradually, the unit that is incorporated into the power networks is including the third fuse group, the 2nd EMI wave filter, interchange preliminary filling circuit, isolation transformer, the 2nd LC wave filter and the inverter circuit that connect gradually, the electric wire netting is gone into in the montage of third fuse, inverter circuit respectively with BOOSTBUCK circuit and second ...

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09-09-2015 дата публикации

Magnetic lifting handle for assembling ferromagnetic precision workpieces

Номер: CN104900391A
Принадлежит:

The invention relates to a magnetic lifting handle, in particular to a magnetic lifting handle for assembling ferromagnetic precision workpieces. The magnetic lifting handle comprises two magnetic actuating mechanisms and rotating adjustment mechanisms connected between the two magnetic actuating mechanisms, each magnetic actuating mechanism comprises a magnetic seat, a middle connecting plate, a force bearing arm, an elastic positioning mechanism and a handle, the upper end faces of the magnetic seat are fixedly connected with the force bearing arms through the middle connecting plates, through holes are formed in the middle connecting plates, the elastic positioning mechanisms connected with the upper end faces of the magnetic seats are arranged in the through holes, one end of each force bearing arm is connected with one side of the corresponding handle, a connecting arm for connecting the corresponding rotating adjustment mechanism is arranged on the other side of the handle, each rotating ...

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11-07-2023 дата публикации

Configuration method and system for optimized operation of multi-mobile energy storage flexible support regional power grid

Номер: CN116415419A
Принадлежит:

The invention provides a configuration method and system for optimized operation of a multi-mobile energy storage flexible support regional power grid. The configuration method comprises the following steps: acquiring operation configuration information of a regional power distribution network and multi-mobile energy storage; inputting the regional power distribution network and the multi-mobile energy storage operation configuration information into a pre-constructed mobile energy storage multi-target optimization model to obtain a multi-mobile energy storage optimization configuration scheme; wherein the mobile energy storage multi-objective optimization model is constructed by taking minimization of power distribution network loss, wind curtailment and light curtailment quantity and operation cost of the power distribution network as objectives; the multi-mobile energy storage optimal configuration scheme comprises the positions, the energy storage charging and discharging states and ...

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