一种新型混合滤波器的控制策略及其特性研究

Study on the Control Strategy and the Characteristics of a Novel Shunt Hybrid Active Power Filter

针对一种适合于大功率场合的新型混合有源电力滤波器,从等效电路出发分析在三种典型控制策略下的滤波特性,推导出不同控制策略下电网谐波电流对系统参数波动的灵敏度系数,提出控制策略与控制参数的选取原则,为该新型滤波器的控制策略和控制参数选择提供理论依据。

Hybrid active power filters,with the advantages of both passive and active power filters, will become important apparatuses in the harmonic suppression of power systems. The key to achieve good filtering performance for such a filter is to choose appropriately the control strategy and the control parameters for its active filtering part, The filtering performance of a novel shunt hybrid active power filter for high power cases is analyzed with three control strategies, based on the equivalent circuits. The sensitivity coefficients of network harmonic current to the network parameters under the three typical control strategies are derived. The principles for choosing control strategies and control parameters are proposed. It can be used as a theoretical guide to the design of such novel hybrid filters.