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Active power optimization control method for distributed wind farms equipped with energy storage power stations

An energy storage power station, decentralized technology, applied in the direction of 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: 2018-04-13
STATE GRID CORP OF CHINA +2
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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

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  • Active power optimization control method for distributed wind farms equipped with energy storage power stations
  • Active power optimization control method for distributed wind farms equipped with energy storage power stations
  • Active power optimization control method for distributed wind farms equipped with energy storage power stations

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Embodiment Construction

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

[0071] as attached figure 1 As shown in the figure, the control object proposed by the present invention is: the wind turbine 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; in the same regional power grid, there are also m wind storage power stations of the same mode, after converging 35kV, are transported 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 as follows: frequency fluctuation, pitch load and line loss of the power grid can be optimized through optimal regulation, the active power loss of the power grid can be reduced, the voltage quality can be improved, and the electrical equipment can be used to operate safely and reliably.

[0073...

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Abstract

The invention relates to a distributed wind farm active power optimization and control method equipped with an energy storage power station. And the power generation characteristics of the energy storage power supply unit, and establish the active power output constraint conditions. According to the external conditions of wind farm operation, it is divided into power-restricted operation and unrestricted power operation. The power-restricted operation is optimized with the minimum pitch control load, line loss and frequency fluctuation; the unrestricted power operation is based on the maximum wind energy capture efficiency and line loss. The minimum loss and the minimum frequency fluctuation are the optimization objectives, and the multi-objective hierarchical optimization problem is used as the objective function. The particle swarm algorithm is used to solve it. This research minimizes and stabilizes the output of wind power active power output through the energy storage system, so as to realize the effective connection between the energy storage system and the existing dispatching operation mode, and at the same time achieve the best economic benefits.

Description

technical field [0001] The invention relates to an active power optimization control method for a decentralized wind farm equipped with an energy storage power station, and belongs to the technical field of active power control for grid-connected operation of wind farms. 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 to optimize the energy structure and promote sustainable development. However, after the large-scale wind power is 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. The decentralized access wind power project refers to the wind power project located near the power load center, not for the purpose of large-sc...

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Application Information

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Patent Type & Authority Patents(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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