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Method for controlling sub-synchronous resonance of wind power station series compensated transmission system

A technology of subsynchronous resonance, power transmission system, applied in the direction of reducing/preventing power oscillation, etc., can solve the problems of small capacity of double-fed fan converter, limited SSR suppression capability of decentralized control method, etc., and achieves easy installation and maintenance, strong suppression capability, The effect of easy expansion

Active Publication Date: 2015-03-11
TSINGHUA UNIV +4
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Problems solved by technology

However, the capacity of DFIG converters is generally small, so the SSR suppression capability of the decentralized control method is limited

Method used

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  • Method for controlling sub-synchronous resonance of wind power station series compensated transmission system
  • Method for controlling sub-synchronous resonance of wind power station series compensated transmission system
  • Method for controlling sub-synchronous resonance of wind power station series compensated transmission system

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Embodiment Construction

[0033] The method for controlling the subsynchronous resonance of the wind farm series compensation transmission system proposed by the present invention has a flow chart as shown in figure 1 shown, including the following steps:

[0034] (1) Connect a coupling transformer in parallel at the bus bar of the wind farm output end of the wind farm series compensation transmission line, and connect the output end of a power electronic converter to the primary side of the coupling transformer;

[0035] In one embodiment of the present invention, the power electronic converter: the product model is RSVG, produced by Rongxin Power Electronics Co., Ltd. Coupling transformer: the product model is SFP-120000 / 220, produced by Jinan Siemens Transformer Co., Ltd.

[0036] (2) Measure the voltage signal at both ends of the series compensation capacitor in the wind farm series compensation transmission line;

[0037] (3) filtering the above-mentioned voltage signal to obtain a sub-synchrono...

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Abstract

The invention relates to a method for controlling the sub-synchronous resonance of a wind power station series compensated transmission system and belongs to the electric power system control technical field. A sub-synchronous current reference signal is given through appropriate signal processing so as to control a switch arranged in a power electronic converter to be on and off and accordingly a sub-synchronous current signal is generated to be injected into the series compensated transmission system, the resonance energy in the wind power station series compensated transmission system is consumed, and accordingly the sub-synchronous resonance in the wind power station series compensated transmission system is effectively inhibited. According to the method for controlling the sub-synchronous resonance of the wind power station series compensated transmission system, the method is based on the modern power electronic technology and the capability of the inhibition on the wind power station SSR (Sub-Synchronous Resonance) is high and the defect that the SSR inhibition capability is limited by the capacity of a fan converter by the traditional decentralized control method is overcome, wherein a sub-synchronous resonance damping control ring can be attached to a converter control system of a doubly-fed fan in the traditional decentralized control method.

Description

technical field [0001] The invention relates to a method for controlling subsynchronous resonance of a series compensation transmission system of a wind farm, and in particular proposes a subsynchronous resonance control method based on a high-power power electronic converter, which belongs to the technical field of power system control. Background technique [0002] Wind energy is a non-polluting renewable energy with abundant reserves. In recent years, the development and utilization of wind energy has attracted widespread attention. With the rapid development of wind power generation, the system part oscillation problem caused by the grid connection of large-scale wind turbines has gradually emerged. Unstable subsynchronous resonance phenomenon (hereinafter referred to as SSR, Subsynchronous Resonance) has occurred in the series compensation transmission system of the wind farm. The SSR phenomenon of the wind farm will cause the current and power of the wind farm to oscil...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 谢小荣胡应宏刘华坤李雨王亮邓春董晓亮刘辉彭珑赵媛端木林楠马鑫晟李蕴红牛晓民王萍
Owner TSINGHUA UNIV
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