Parameter setting method for wind turbine set circuit breaker

Abstract

The invention discloses a parameter setting method for a wind turbine set circuit breaker. The method comprises the steps that 1, an equivalent model of an electrical system and an equivalent model of an electric generator of a target wind turbine set are built; 2, short-circuit calculation is carried out according to the built models, and a fault current range of the wind turbine set during a short-circuit fault is obtained; the tolerance time of each component in the wind turbine to fault current during the short-circuit fault is calculated, and the tolerance capacity of the wind turbine set to the fault current is obtained; 3, according to the obtained fault current range and tolerance capacity, setting values of acting time and current in the circuit breaker to be set are determined according to the obtained fault current range and tolerance capacity, so that according to the setting values, when the current in the wind turbine set exceeds a fault current range, the circuit breaker to be set acts in the tolerance capacity range so as to open a circuit. The parameter setting method has the advantages that implementation is easy, parameters can be set by combining electrical characteristics and fault working conditions of the wind turbine, and parameter safety is high.

Description

technical field [0001] The invention relates to a technical scheme for parameter setting of a wind turbine, in particular to a parameter tuning method for a circuit breaker of a wind turbine. Background technique [0002] Wind turbines inevitably have a large amount of flammable grease, flammable nacelle covers and blades and other materials, which are likely to cause fires when ignited by electrical fire sources. Electrical short circuit faults are one of the main causes of unit burns. The electrical fire source is caused by an electrical fault, and the electrical fault needs to be protected by the setting parameters of the circuit breaker. Therefore, the setting of the circuit breaker parameters directly affects the safety performance of the electrical system of the wind turbine. [0003] At present, there is no unified and standardized parameter setting method for the circuit breaker in the wind power industry generator connected to the power grid system. Set the setting...

AI Technical Summary

Problems solved by technology

The setting value obtained through the tuning of the asynchronous motor does not consider the electrical characteristics of the wind turbine and the fault condition during the tuning process. If the fixed value (parameter setting of the circuit breaker) does not match the short-circuit characteristics of the wind turbine and the external circuit cannot be cut off in time or there is no corresponding arc-extinguishing measure, since the voltage at the short-circuit point is high enough, the arc short-circuit will be self-sustaining, and the huge energy generated by the short-circuit Melt or directly volatilize metal parts to ignite the surrounding combustibles, causing the unit to catch fire and burn down

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