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Low voltage ride through verification method for wind power station

A low-voltage ride-through and capability verification technology, applied in the field of verification, can solve problems such as long equipment transportation cycles, and achieve far-reaching social and market benefits

Inactive Publication Date: 2012-09-12
NORTHEAST POWER SCI RES INSTITUTION +2
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AI Technical Summary

Problems solved by technology

[0004] Low-voltage ride-through testing equipment is used to verify the low-voltage ride-through capability of wind farms. The equipment transportation period is long, and the random inspection can only be performed on a single wind turbine in the entire wind farm.

Method used

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  • Low voltage ride through verification method for wind power station

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Embodiment 1

[0065] Such as figure 1 As shown, the present invention is a method for verifying the low-voltage ride-through capability of a wind farm. The present invention conducts artificial short-circuit test on the 35kV collector line of the wind farm according to the natural conditions of the wind farm, and controls the voltage drop depth of the 35kV bus according to the distance between the short-circuit point and the 35kV bus of the wind farm and the impedance of the collector line, so as to achieve the assessment of the operation of the wind turbine in the wind farm The purpose of the low voltage ride through capability.

[0066] The present invention uses a short-circuit test method to verify the low-voltage ride-through capability of the wind farm. The basic principle is to conduct an artificial short-circuit test on the 35kV collector line of the wind farm according to the natural conditions of the wind farm, and based on the distance between the short-circuit point and the 35kV...

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Abstract

The invention belongs to the technical field of low voltage ride through verification methods for wind power stations, in particular to a verification method designed by aiming at nationally required wind power station low voltage ride through spot check. According to the verification method, the low voltage ride through of a wind power station is simply and quickly verified by adopting a short-circuit testing mode and evaluated according to a short-circuit testing result. The fundamental principle of the low voltage ride through verification method lies in that a manual short-circuit test is carried out on a 35kV current collection line of the wind power station according to natural conditions of the wind power station, and a 35kV bus voltage drop depth is controlled according to a distance from a short-circuit point to a 35kV bus of the wind power station so as to achieve the purpose of checking the low voltage ride through of a running wind generation set of the wind power station.

Description

technical field [0001] The invention belongs to the technical field of a verification method for low-voltage ride-through capability of wind farms, in particular a verification method designed for sampling inspection of low-voltage ride-through capabilities of wind farms required by the state. Background technique [0002] Since the beginning of this year, there have been many large-scale wind turbine off-grid accidents in my country, which have adversely affected the safety of power grid operation. Among them, the lack of low-voltage ride-through capability of wind turbines is the main reason for the release of accidents. The lack of low-voltage ride-through capability of wind turbines is the biggest safety hazard in wind power operation at present. [0003] In accordance with the requirements of the National Energy Administration and the State Grid Corporation of China, it is necessary to comprehensively carry out sampling inspections of the low-voltage ride-through capabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 戈阳阳刘劲松李胜辉谢赐戬孙峰程绪可付尧张佳斌
Owner NORTHEAST POWER SCI RES INSTITUTION
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