谐波侵入引起风电场风机故障分析及抵御策略研究

Analysis and Defense Strategy Research on Wind Power Generation Fault Caused by Harmonic Penetration

对呼伦贝尔某风电场自2012年9月以来的几次风机故障停机事故进行分析研究,提出风电场谐波测试方案,研究风电场并网点、集电线路、风电机组等不同电气位置的谐波水平及特征,简要分析谐波过电压导致风电机组脱网的故障机理,得出电网侧5次、7次、11次谐波侵入是造成此类停机事故的根本原因,最后结合现场工程实际提出谐波侵入抵御方案。仿真结果显示,加装滤波器组是应对谐波入侵的一种非常有效的防范策略。

In this paper,several times of wind power generation fault in a wind farm of Hulun Buir since September 2012 were analyzed and studied.Wind farm harmonic test scheme was proposed.Harmonic levels and characteristics under the condition of wind farm connection,collecting line bus and wind power generations and other electrical location etc.were studied.The fault mechanism of the wind power generations out of the network caused by harmonic overvoltage was analyzed briefly.It was concluded that the grid side 5th,7th and 11th harmonic penetration were the root cause of this outage.The simulation results showed that harmonic absorption equipment was a very effective defense measures for harmonic penetration.