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Method for optimizing and regulating and controlling active power of distributed wind power plant with energy storage power station

A technology for energy storage power stations and wind farms, applied in wind power generation, optimization of machine performance, control of wind turbines, etc., can solve the problem of large overall loss of wind turbines

Active Publication Date: 2013-12-11
STATE GRID CORP OF CHINA +2
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  • Application Information

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Problems solved by technology

[0007] The invention provides a distributed wind farm active power optimization control method equipped with an energy storage power station. Based on the different operating conditions of the field, a multi-objective function can be established, which can effectively control the frequency fluctuation and at the same time reduce the wind turbine pitch load and reduce the active power loss of the wind farm

Method used

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  • Method for optimizing and regulating and controlling active power of distributed wind power plant with energy storage power station
  • Method for optimizing and regulating and controlling active power of distributed wind power plant with energy storage power station
  • Method for optimizing and regulating and controlling active power of distributed wind power plant with energy storage power station

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Embodiment Construction

[0070] The present invention will be further described below in conjunction with the accompanying drawings.

[0071] as attached figure 1 As shown, the control object proposed by the present invention is: the wind turbine unit and the energy storage power station are connected to the 10kV local substation circuit together, and then connected to the public access point (PCC / 1) through 10kV / 35kV; m wind storage power stations of the same model, converging 35kV and then transmitting to different end-user loads; 35kV can be boosted and then connected to the public large power grid.

[0072] The basic idea of ​​the present invention is that the frequency fluctuation, pitch load and line loss of the power grid can be optimized through the optimization regulation, the active power loss of the power grid can be reduced, the voltage quality can be improved, and the electric equipment can be used for safe and reliable operation.

[0073] The active power optimization problem considered...

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Abstract

The invention relates to a method for optimizing and regulating and controlling active power of a distributed wind power plant with an energy storage power station. According to the method, the constraint condition is set to top and bottom limitation constraint output by the active power and maximum and minimum limiting values of single body power generation according to the wind power net-in guide rule, and the output constraint condition of the active power is set up according to the wind power and energy storage power source single body power generation characteristic. According to the external condition of wind power plant operation, the method is divided into limited power operation and unlimited power operation, the optimization objective of the limited power operation is to enable pitch control loads, line loss and frequency fluctuation to be minimum, the optimization objective of the unlimited power operation is to enable wind energy capture efficiency to be maximum and the line loss and the frequency fluctuation to be minimum, and the objective function of the unlimited power operation is the multiple target layered optimization problem. The particle swarm optimization is used for carrying out solution. According to the method, the wind power active power output under the effect of an energy storage system is output stably with minimized loss, and therefore effective connection between the energy storage system and an existing scheduling operation mode and optimum economic benefits are achieved.

Description

technical field [0001] The invention relates to an active power optimization control method for a distributed wind farm equipped with an energy storage power station, and belongs to the technical field of active power control for wind farm grid-connected operation. Background technique [0002] As the country attaches great importance to renewable energy power generation, my country's wind power has become an important emerging industry for optimizing energy structure and promoting sustainable development. However, with the large-scale wind power connected to the grid, the security, reliability, power quality and grid dispatching of the power system will be affected by the volatility and randomness of wind power generation. The centralized large power grid has strong coupling and cannot track changes flexibly and reliably. Distributed access wind power projects refer to wind power projects that are located near the power load center and do not aim at large-scale long-distan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48
CPCF03D7/0284F03D7/048H02J3/48F05B2270/20H02J3/28Y02E70/30H02J2300/28H02J3/381H02J3/46Y02E10/72Y02E10/76
Inventor 邢作霞王文杰杨俊友刘劲松李玉婷姜立兵崔嘉王海鑫
Owner STATE GRID CORP OF CHINA
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