Electric control system of asynchronous wind generating set

Abstract

The invention relates to an electric control system of an asynchronous wind generating set. The electric control system comprises a master control system (MCS), a full power converter, a machine side self-excited capacitor unit (SCU), a breaker K and a converter controller KZQ, wherein an A port and a B port are arranged on the full power converter, the A port is connected with a stator of an asynchronous generator, and the B port is connected with a power grid through the breaker K. The full power converter comprises a ram side converter (RSC), a grid side converter (GSC) and a direct current braking unit (DBU), wherein the ram side converter (RSC) and the net side converter (GSC) are connected in a back-and-back mode through a common direct current bus, and the direct current braking unit (DBU) is connected onto the common direct current bus. A filter LB1 is arranged between an alternating current input side of the net side converter and the B port, and a filter LB2 is arranged between an alternating current input side of the ram side converter (RSC) and the A port. After the MCS obtains operation information of the asynchronous wind generating set, the converter controller KZQ is used for controlling the full power converter.

Description

technical field [0001] The invention designs an electric control system for asynchronous wind power generators, which is suitable for the transformation of fixed-pitch and constant-speed asynchronous wind power generators and variable-pitch constant-speed asynchronous wind power generators, and can also be applied to variable-pitch and variable-speed asynchronous wind power generators The technical field of power equipment control. Background technique [0002] With the continuous and rapid development of the global economy in the 21st century, energy has become a bottleneck restricting the development of energy in various countries. At the same time, due to the improvement of living standards, people pay more and more attention to the environment in which they live. energy. Among the many renewable energy sources at present, wind power is the most mature, most suitable for large-scale development, and most competitive. [0003] The main function of the wind power generati...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low wind energy utilization efficiency, large grid-connected impact, large reactive power fluctuations, and lack of low voltage ride-through capability existing in traditional fixed-pitch or variable-pitch constant-speed asynchronous wind power generating sets. A grid-friendly wind power system that can not only improve wind energy utilization efficiency and power generation, but also have dynamic reactive power adjustment and low-voltage ride-through

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