Wind power base evaluation method and device and electronic equipment

The invention relates to an evaluation method and device of a wind power base and electronic equipment. The evaluation method comprises the steps of determining an evaluation index and an evaluation index value of the wind power base; wherein the evaluation indexes comprise a power generation evaluation index, a power limit evaluation index and a section utilization rate non-standard-reaching rate; the evaluation index values are substituted into a wind power base index score calculation model, and score values corresponding to the evaluation indexes of the wind power base are obtained through calculation; determining weight information of evaluation indexes of the wind power base according to the power utilization information of the wind power base; and according to the weight information of the evaluation indexes, performing weighted summation on the score value of the wind power base to obtain an evaluation value of the wind power base. Therefore, the wind power base is evaluated according ...

Grounding protection configuration method for generator stator of gas turbine system

The invention discloses a gas turbine system generator stator grounding protection configuration method, which comprises the following steps: acquiring a neutral point zero sequence voltage value, calculating a fundamental wave zero sequence voltage stator grounding protection alarm value, and connecting a generator outlet circuit breaker position contact to a generator-transformer group protection device strong current input channel through a secondary line; a main transformer low-voltage side zero-sequence voltage sampling channel is added to a generator protection device, main transformer low-voltage side zero-sequence voltage is connected to the main transformer low-voltage side zero-sequence voltage channel through a secondary line, and the generator-transformer set protection device achieves third harmonic ratio stator grounding protection according to the ratio of neutral point zero-sequence voltage of a generator to the main transformer low-voltage side zero-sequence voltage. And ...

Mn-Zn ferrite magnetic material with high magnetoconductivity and high impedance and method for making the same

The invention relates to a Mn and Zn ferrimagnetism material and a preparation method thereof. The Mn and Zn ferrimagnetism material is made of principal ingredients and subsidiary ingredients. The weight percentages of the principal ingredients which are oxides are calculated as follows: Fe2O3 accounts for 61 percent to 75 percent by weight; ZnO accounts for 12 percent to 30 percent by weight; the rest principal ingredient is Mn3O4. The subsidiary ingredients are one or a plurality of kinds of CaCO3 accounting for 0 to 300ppm by weight; SiO2 accounting for 50ppm to 250ppm by weight; Bi2O3 accounting for 0 to 500ppm by weight. The Mn and Zn ferrimagnetism material has both high magnetic permeability and high impedance.

Wind-solar-fire storage base production simulation method and device

The invention discloses a wind, light and fire storage base production simulation method and device, and the method comprises the steps: generating a power grid model according to the topological information of a base access power grid, generating a power supply constraint condition according to a power supply operation mode, and generating a production simulation optimization model according to the power grid model and the power supply constraint condition, and finally, based on a preset objective function, solving and calculating the production simulation optimization model to obtain a power supply operation curve. By acquiring the power supply operation curve, the power supply operation of the wind-solar-thermal storage base can be guided according to the power supply operation curve, so that the economic cost can be saved, the real-time benefit can be improved, the carbon emission can be reduced, and the safe operation level of the base can be improved.

Ölpumpe eines Verbrennungsmotors

Eine Ölpumpe für einen Verbrennungsmotor wird offenbart, die die folgenden Bauelemente aufweist: Eine Rotorbaugruppe (2); eine Flügelbaugruppe (3), die mit dem Rotor (7) verbunden ist; und eine Statorbaugruppe (4), die einen Stator (6) und einen Gleitblock/Läufer (9) aufweist, wobei der Stator (6) im Gleitblock/Läufer (9) eingefügt ist. Wenn sich die Flügel (10) und der Rotor (7) synchron drehen, drehen sich der Stator (6) und der Gleitblock/Läufer (9) relativ zu einander. Die Ölpumpe (1) kann anhand der tatsächlichen Betriebszustande verbessert werden, was zur Reduktion des Energieverbrauchs und Verminderung des Verschleißes führt.

System and method for limiting direct-current grounding short-circuit current during dragging period of power station generator

The invention discloses a system and method for limiting DC grounding short-circuit current during dragging of a power station generator, and the method comprises the steps: limiting the short-circuit current caused by DC grounding of a frequency converter through employing a grounding mode that a generator neutral point grounding transformer and a grounding resistor are connected in series, thereby enabling the short-circuit current to be limited during the dragging and operation of the generator; the system and the method limit short-circuit current caused by direct-current grounding of the frequency converter, realize no operation when the neutral point knife switch of the generator is located at the closing position during dragging and operation of the generator, and achieve the purposes of shortening starting time and reducing faults.

Method and system for determining reliability target curve of single component of wind turbine generator

The invention provides a method and a system for determining a reliability target curve of a single component of a wind turbine generator. The method comprises the following steps: acquiring a reliability requirement curve of a whole wind turbine generator, a reliability expected value curve of a first component set in the whole wind turbine generator and a preset output power feasible region of the wind turbine generator; reliability index values, corresponding to the reliability requirement curve of the whole wind turbine generator and the reliability expected value curve of the first component set in the whole wind turbine generator, of all the numerical values in the feasible region are determined; and determining a reliability target value curve of the to-be-selected single component in the wind turbine generator according to the reliability index values corresponding to the values in the feasible region on the reliability requirement curve of the whole wind turbine generator and the ...

Composition material formed by natural cellulose and synthetic resin or polylactic acid

The invention relates to a composition material formed by natural cellulose and synthetic resin or polylactic acid, and belongs to the technical field of synthetic materials. The composition material formed by the natural cellulose and the synthetic resin or polylactic acid comprises 10 to 90 weight percent of natural cellulose powder, 90 to 10 weight percent of resin and 0 to 5 weight percent of coupling agent, wherein the natural cellulose powder is straw, bagasse, sawdust or low value wood; the resin is any one of synthetic resin or polylactic acid; and the coupling agent is any one of silanes and titanate esters. The composition material has the advantages of low cost, high mechanical strength, low residue of harmful substances such as formaldehyde and melamine, and quickly natural degradation of cellulose in the composition under the action of microorganisms or physical and chemical factors.

Anti-shaking hydraulic lifting platform

An oil pump, an oil tank and a lower sliding way are arranged on the upper end face of a lifting table base, and a lower sliding block is connected into the lower sliding way in a sliding mode. An upper sliding way is embedded in the lower end face of the lifting table storage plate, and an upper sliding block is slidably connected into the upper sliding way. The cross arm comprises a first movable arm and a second movable arm, the first movable arm is hinged to the second movable arm, the two ends of the first movable arm are hinged to the lifting table base and the upper sliding block respectively, and the two ends of the second movable arm are hinged to the lower sliding block and the lifting table storage plate respectively; a telescopic rod is arranged between the first movable arm and the second movable arm; the oil pump is in transmission connection with an oil tank which communicates with telescopic rods through oil pipes. According to the lifting platform, when the lifting platform ...

Method and system for calculating wind power density of base

The invention provides a wind power density calculation method and system for a base, and the method comprises the steps: dividing a target region into a plurality of grids according to different geographic information, and determining the longitude and latitude information of each grid; determining a target grid where the base is located according to the latitude and longitude information of the base to be researched and the latitude and longitude information of each grid; acquiring historical weather forecast information or real-time weather monitoring information of the target grid; and from historical weather forecast information or real-time weather monitoring information, wind speed time sequence data at the height of a hub of a wind turbine generator of the base and temperature time sequence data and air pressure time sequence data of the target grid are obtained, and the wind power density of the base is calculated according to the wind speed time sequence data, the temperature ...

Mn-Zn ferrite magnetic material with high magnetoconductivity and high impedance and method for making the same

The invention relates to a Mn and Zn ferrimagnetism material and a preparation method thereof. The Mn and Zn ferrimagnetism material is made of principal ingredients and subsidiary ingredients. The weight percentages of the principal ingredients which are oxides are calculated as follows: Fe2O3 accounts for 61 percent to 75 percent by weight; ZnO accounts for 12 percent to 30 percent by weight; the rest principal ingredient is Mn3O4. The subsidiary ingredients are one or a plurality of kinds of CaCO3 accounting for 0 to 300ppm by weight; SiO2 accounting for 50ppm to 250ppm by weight; Bi2O3 accounting for 0 to 500ppm by weight. The Mn and Zn ferrimagnetism material has both high magnetic permeability and high impedance.

Automatic connection cold press

The utility model particularly discloses an automatic connection cold press which comprises a machine body (6) and a workbench (5), the machine body (6) comprises a first machine frame (1) and a second machine frame (2), and the second machine frame (2) and the bottom of the first machine frame (1) are connected into a whole in a tangent mode. The workbench (5) is located at the bottom of the first rack (1), and the feeding device (4) is located at the bottom of the machine body (1) and penetrates through the workbench (5). The cold press provided by the utility model is high in working efficiency, reduces a certain amount of manpower investment, and has a better cold pressing effect on products.

A low power consumption Mn-Zn ferrite magnetic material for ultra-high temperature condition and its making method

Wind power plant level MPPT prediction model control method and device

The invention provides a wind power plant level MPPT prediction model control method, and relates to the technical field of fan control, and the method comprises the steps: obtaining the wind speed field time-space sequence data of a wind power plant range of a first preset time length; on the basis of the wind speed field space-time sequence data, a trained wind speed prediction model is used for prediction, a wind speed field space-time sequence prediction result of a second preset duration is obtained, and the second preset duration is adjacent to the first preset duration; and according to the wind speed field space-time sequence prediction result, calculating a control quantity sequence of each fan within a second preset duration, and according to a first control quantity in the control quantity sequence, controlling the rotating speed of the fan at the next moment. The rotating speed of the fan can be controlled more optimally, so that the operation efficiency of the wind turbine ...

Metal surface and internal defect classification method based on magnetic anomaly signal

The invention discloses a metal surface and internal defect classification method based on magnetic anomaly signals. According to the method, on the basis of a natural geomagnetic field, the front surface and the back surface of a to-be-tested piece are scanned through a scanning device, front scanning is regarded as surface defects, and back scanning is regarded as internal defects. After magnetic signals on the surface of the test piece are collected, feature information of defects is extracted; an algorithm classification model with weak magnetic signal defect feature values as input and defect positions as output is established, and a Bayesian optimization algorithm is combined with a crossover method to optimize hyper-parameters in the LightGBM model; and utilizing the optimized LightGBM model to carry out classification prediction on defect positions.

Ordered gel resin containing aromatic polymer

Food container directly made method by paper pulp

The method uses paper pulp as raw materials, the pulp is diluted in a container, then a metallic net with the shape and size equal to that of a food container is inserted on a vacuum forming mould, and then be put into the above mentioned pulp container, and through pumping, forming in a drying machine and removing the metallic net the dried pulp adhered on the net is pressed into form, then after drying de moulding and surface treating, the product can be made. Said invention features good appearance, low cost, it can be burnt after use, conforms to sanitary requirement, and does not contaminate the environment.

Foam curtain spraying device capable of preventing coal hopper from being blocked

The invention relates to a foam curtain spraying device for preventing blockage of a coal hopper. The foam curtain spraying device comprises the coal hopper, a foam curtain generating unit and a foam mixed liquid supply unit, the foam curtain generation unit is of a hollow structure, and a foam mixed liquid temporary storage cavity is formed in the foam curtain generation unit. The foam curtain generating unit is arranged on the side wall of the coal hopper and can spray a foam curtain to the inner wall of the coal hopper, and a flowing foam curtain is formed on the inner wall of the coal hopper. The foam curtain is arranged between the coal layer close to the inner wall of the coal hopper and the inner wall of the coal hopper, so that the friction coefficient of coal and the inner wall of the coal hopper is reduced, the viscosity coefficient of the coal layer close to the inner wall of the coal hopper is effectively reduced, the blockage condition is relieved, and the operation stability ...

Cross-inductor voltage regulator for high bandwidth power delivery

The invention relates to a cross-inductor voltage regulator for high bandwidth power delivery. A voltage regulator having a plurality of primary stages and at least one acceleration voltage regulator (AVR) bridge is provided. The primary stage may respond to low frequency current transients and provide DC output voltage regulation. The AVR bridge is switched much faster than the primary stage and is responsive to high frequency current transients without regulating the DC output voltage. The AVR bridge frequency response range may overlap the primary frequency response range, and the lowest frequency responded by the AVR bridge may be set to be lower than the highest frequency responded by the primary.

Low dissipative ferrite material of manganese and zinc in broad frequency, and high magnetic permeability, and preparation method

Offshore wind power plant monitoring information transmission method

According to the offshore wind plant monitoring information transmission method and device and the storage medium, an offshore wind plant comprises an offshore booster station and at least one offshore wind turbine, the offshore booster station is connected with the at least one offshore wind turbine through a first submarine optical cable, and the offshore wind turbine is provided with a 4G base station; the offshore wind pressure station is connected with the control center through a second submarine optical cable, and the offshore wind power plant monitoring information transmission method comprises the steps that an offshore wind turbine obtains monitoring information of ships in a preset area through a 4G communication network, and the ships are provided with 4G mobile communication terminals; the offshore wind turbines transmit monitoring information of the offshore wind turbines to the offshore booster station through the first submarine optical cable, and the offshore booster station ...

Network server framework of high security

The utility model discloses a network server framework of high security, including secure network server, identity service engine, the accurate entry control system of network and access control system, identity service engine and secure network server both way junction, accurate entry control system of network and secure network server both way junction, access control system and secure network server both way junction, the secure network server includes power, treater, trusted platform module, network interface, hardware RAID, SSL accelerator card and memory, power and treater electric connection, the treater respectively with trusted platform module, network interface, hardware RAID and SSL accelerator card both way junction, memory and treater one -way connection.

Fire water monitor control method and system

The invention relates to the technical field of fire fighting equipment, in particular to a fire water monitor control method and system, and the method comprises the steps: obtaining the feature information of a fire scene, sending alarm information, and automatically starting a fire water monitor at a preset position; temperature zoning is conducted according to the temperature points of the fire scene, the horizontal swing angle and the pitching swing angle of the fire water monitor are determined according to the temperature points obtained after temperature zoning, and fire extinguishing is conducted after the horizontal swing angle and the pitching swing angle are determined; when the fire water monitor conducts fire extinguishing, the water spraying pressure of the fire water monitor is monitored in real time, and when the water spraying pressure exceeds a preset pressure interval, an early warning signal is sent, and the water flow of the fire water monitor is adjusted. The intelligent ...

Displacement-variable blade pump with simplified structure

The invention discloses a displacement-variable blade pump with a simplified structure. The displacement-variable blade pump comprises a pump body, a variable slide block, a rotor, a blade, a positioning support ting, a variable spring and a feedback oil cavity, wherein a cavity is formed in the pump body; the variable slide block, the rotor, the blade, the positioning support ring and the variable spring are all mounted in the cavity of the pump body; a pressure plate is arranged on the variable slide block, and is contacted with and fits the variable spring; a positioning cylindrical ring is arranged at the other end, corresponding to the pressure plate, of the variable slide block, and is provided with an opening groove or a through hole; a cylindrical hole fitting the positioning cylindrical ring of the variable slide block is formed in one side of the cavity of the pump body; the positioning cylindrical ring of the variable slide block tightly fits the cylindrical hole of the pump ...

Oil pump of internal combustion engine

The invention discloses an oil pump of an internal combustion engine. The oil pump comprises a rotor assembly, a blade assembly connected with the rotor assembly, and a stator assembly which comprises a stator and a slide block used for being connected in the stator in a sleeving manner. When the blade assembly and the rotor assembly synchronously rotate, the stator and the slide block can relatively rotate. According to the oil pump, the running state can be improved according to actual working conditions, so that the energy consumption is reduced and the friction state is improved.

High magnetic conductivity, low THD soft magnetic ferrite magnetic material and method for preparing the same

A low power consumption Mn-Zn ferrite magnetic material for ultra-high temperature condition and its making method

The invention relates to a Mn-Zn ferromagnetic material and a preparation method thereof. The Mn-Zn ferromagnetic material mainly contains (calculated by oxide): Fe2O3 52-56mol percent, ZnO 2-10mol percent, MnO 38-42mol percent, and auxiliary element selected from one or the combination of CaO 400-800ppm, Nb2O5 100-400ppm, ZrO100-800ppm, and Co2O3 1,000-5,000ppm. The Mn-Zn ferromagnetic material has high saturation induction density and low power consumption and excellent electromagnetic property under ultrahigh temperature conditions.