Control method of wind farm cluster static reactive power compensation device

A control method and technology of compensation device, applied in reactive power adjustment/elimination/compensation, wind power generation, flexible AC transmission system, etc., can solve the problem of lack of multiple interconnected SVCs, etc., to improve the transmission capacity and improve the capacity Extreme, adaptable effect

Active Publication Date: 2019-02-15
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0015] At present, the research on the basic control method of a single SVC is quite mature, but there is still a lack of a comprehensive control method for multiple interconnected SVCs, that is, clustered SVCs.

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  • Control method of wind farm cluster static reactive power compensation device
  • Control method of wind farm cluster static reactive power compensation device
  • Control method of wind farm cluster static reactive power compensation device

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] According to the economic voltage difference, the inventors of the present application innovatively proposed the idea, adjustment method and process of the clustered SVC, and took the minimum reactive power loss of the power grid as the main goal, the maximum power factor as the secondary goal, and the upper and lower limits of the voltage As constraints, a multi-objective optimization model is established. Then, the inventor proposes a control method of the clustered SVC in the wind farm. The clustered SVC simultaneously controls the voltage regulation equipment at multiple locations according to the infor...

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Abstract

For overcoming the shortcomings of the prior art, the invention provides a control method for a wind power plant cluster-type static var compensator. The control method comprises the following steps: S1, the U, P and Q data of each wind turbine generator in running are obtained in real time through a SVC (static var compensator) data collection and monitoring control system, and the obtained data is sent to a centralized control terminal; S2, the centralized control terminal calculates to obtain a reactive power real-time optimized value QOPT according to the obtained U, P and Q data in the step S1; the reactive power optimized value QOPT and a real-time reactive power Qret are compared and analyzed to determine a regulating behavior of the reactive power compensating equipment, and a regulating instruction is sent; and S3, the SVC performs regulation and control and performs the step S1 repeatedly according to the regulating instruction sent from the step S2. According to the method, the voltage control mode of the whole system is centralized to a control system, the SVC setting in each wind power plant is dynamically optimized, the reactive power compensating equipment with dynamic regulating capabilities are subjected to the unified coordination, and comprehensive control instructions are sent out according to the online information.

Description

technical field [0001] The invention belongs to the field of intelligent control of power grids, and relates to a control method for a clustered static reactive power compensation device of a wind farm. Background technique [0002] With the increase of the grid-connected capacity of wind farms, the injection of wind power changes the power flow distribution of the local power grid, and the characteristics of wind power are volatility and intermittent, which has a great impact on the voltage quality and stability of the local power grid, and reduces the voltage stability. In order to maintain voltage stability, dynamic reactive power compensation devices with sufficient capacity must be installed in each wind farm and substation. [0003] Static var compensation device (hereinafter referred to as SVC) is a kind of var compensation device widely used in wind farms. The basic control methods of a single SVC include constant voltage control, constant reactive power control, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E10/76Y02E40/10
Inventor 刘鹏李海吕志来
Owner STATE GRID CORP OF CHINA
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