某海上风电场谐波谐振实测及仿真分析

Test and simulation research on harmonic resonance of offshore wind farm

海上风电发展迅速,很多海上风电场采用长距离交流海底电缆接入电网,海缆较高的对地电容使风电场谐波谐振问题愈加突出。本文对某海上风电场因5次谐波谐振造成谐波异常及风机偏航系统故障进行实测,就谐振原因开展阻抗频率扫描和谐波潮流分析并提出相应的抑制措施。

As the rapid development of offshore wind farms,long distance AC submarine cables are widely used.The high grounding capacitance of submarine cable is likely to cause harmonic resonance,which may threaten the safety of wind farms.Tests are taken to investigate the harmonic abnormal and yaw system fault of wind turbines in an offshore wind farm caused by 5th harmonic resonance.Impedance frequency scan and harmonic power flow analysis are applied to simulate the causes of resonance and methods for resonance suppression are suggested.