同步调相机接入高压直流近区谐振风险快速评估方法

A fast assessment method of HVDC near zone resonance after the connection of synchronous condenser

为了提高换流站的无功支撑能力,交流滤波器和同步调相机在高压直流近区得到了广泛的应用。然而换流站配置的交流滤波器易与系统背景谐波阻抗交互导致谐波谐振,且现有研究鲜有同步调相机对于系统谐振影响的分析,进一步加剧了换流站谐波谐振的风险。为此本文详细分析了不同容量的交流滤波器和同步调相机与交流侧背景谐波阻抗的交互作用,得出同步调相机有着抑制或加速系统谐波谐振风险的结论。在此研究基础上,提出换流站高压直流近区谐振风险快速评估方法,可为换流站滤波器容量配置方案提供参考。

In order to improve the reactive power support capacity of converter station,AC filter and synchronous condenser have been widely used in the near region of HVDC.However,the AC filter configured in the converter station is easy to interact with the system background harmonic impedance,resulting in harmonic resonance,and there is little analysis of the impact of synchronous condenser on the system resonance,which further aggravates the risk of harmonic resonance in the converter station.Therefore,this paper analyzes the interaction between AC filter banks and synchronous condenser with different capacities and the background harmonic impedance on the AC side in detail,and comes to the conclusion that synchronous condenser has the risk of restraining or accelerating the harmonic resonance of the system.Based on this research,a fast risk assessment method of HVDC near zone resonance in converter station is proposed,which can provide a reference for the filter capacity configuration scheme of converter station.