可用于高压电网的新型混合滤波器研究

Research on a novel hybrid filter for high voltage power grid

为满足大容量无功补偿和提高谐波抑制能力两方面的要求,以郑州换流站交流侧电网为滤波对象,提出一种可用于高压电网的新型混合滤波器。在分析新型混合滤波器的拓扑结构和滤波原理之后,分别探讨了把有源部分控制成电压源或电流源的情况,并且选择了合适的控制策略。设计了无源部分参数,运用Matlab软件做出谐波抑制函数曲线并对该混合型滤波器的谐波抑制能力进行分析。结果表明,在系统参数波动的情况下,该装置仍具有很高的稳定性,验证了新型混合滤波器具有良好的谐波抑制能力。

To meet large capacity reactive power compensation and to improve harmonic suppression ability,a novel hybrid filter that could be used for high voltage power network was proposed by taking the AC side of Zhengzhou converter station in power grid as a filter object. After analyzing the topological structure and work theory of the novel hybrid filter,the active part of the control into the voltage source and current source situation were discussed respectively,and an appropriate control strategy was selected. Then,the passive part parameters were chosen and a harmonic suppressing function was used to analyze the influence of different system parameters on the novel hybrid filter with Matlab. The results show that the device still has high stability when the system parameters fluctuate,implying that the new hybrid filter has good harmonic suppression ability.