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Reactive power coordination control method and system for wind power plant

A technology of coordinated control and wind farms, applied in the direction of reactive power adjustment/elimination/compensation, AC network voltage adjustment, electrical components, etc., can solve the problems of dynamic reactive power reserve of reactive power compensation equipment and failure to meet the power grid system, etc. Achieve the effect of improving fault ride-through capability, fast response, and improving dynamic reactive power reserve

Pending Publication Date: 2022-05-10
TSINGHUA UNIV
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  • Claims
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Problems solved by technology

However, none of the existing optimization methods can make the reactive power compensation equipment have the optimal dynamic reactive power reserve, so it cannot meet the needs of the power grid system

Method used

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  • Reactive power coordination control method and system for wind power plant
  • Reactive power coordination control method and system for wind power plant
  • Reactive power coordination control method and system for wind power plant

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0045] In the related technology, for the second-level fast time-scale voltage fluctuation, in order to meet its requirements for response speed, local control mode is usually used for suppression, centralized control based on high-speed communication, and decentralized or distributed control methods. Once the power grid fails, it may cause huge economic losses.

[0046] Based on this, the inventors found that since the communication and coordination of the control of the ...

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Abstract

The invention provides a reactive power coordination control method and system for a wind power plant, and particularly relates to the field of wind power plant control, and the method comprises the steps: firstly, determining the first reactive power of a reactive power compensation device according to a power grid dispatching instruction when a power grid system is in a transient fault state, and performing first-stage reactive power compensation on the power grid system according to the first reactive power until the power grid system is in a steady-state operation state, so that the characteristics of high response speed and high speed of the reactive power compensation device are fully utilized, and transient faults can be quickly processed; and secondly, when the power grid system is in the steady-state operation state, determining second reactive power of the reactive power compensation device and third reactive power of the target wind turbine generator, and performing second-stage reactive power compensation on the power grid system in the steady-state operation state by using the second reactive power and the third reactive power, therefore, the dynamic reactive power reserve of the wind power plant can be greatly improved, and the fault ride-through capability of the wind power plant can be greatly improved.

Description

technical field [0001] The invention relates to the field of wind farm control, in particular to a wind farm reactive power coordination control method and system. Background technique [0002] Voltage is one of the important indicators to measure power quality, which directly affects the stability of power grid operation. If the grid voltage is too high or too low, the equipment will be damaged, and even cause large-scale power outages in severe cases. The voltage is generally controlled by adjusting the reactive power locally. Therefore, in order to improve the stability of the grid voltage, it is necessary to reasonably adjust the reactive power distribution of the grid. According to the requirements of the grid code, the wind farm needs to provide a certain amount of dynamic reactive power support to the grid during the fault period. [0003] In related technologies, reactive power compensation equipment and wind turbines can perform dynamic reactive power support, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/50H02J3/16H02J3/18H02J3/38
CPCH02J3/50H02J3/16H02J3/1842H02J3/381H02J2300/28
Inventor 耿华赵晟凯
Owner TSINGHUA UNIV
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