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有源电力滤波器在抑制电网谐波、提高电能质量方面有良好的应用前景。提高有源电力滤波器的装置容量是应用中有待解决的关键技术问题之一。文中在综合国内外目前实现大容量有源电力滤波器方法的基础上 ,介绍了一种采用多个模块化 PWM主电路单元组合实现的大容量并联型有源电力滤波器 ,给出了该有源电力滤波器的主电路结构拓扑 ,分析了系统的工作原理及控制方法 ,并对在实现该装置时所遇到的问题进行了讨论。工业现场实验结果表明 ,采用该方法实现的有源电力滤波器有着良好的补偿特性 ,有效地解决了有源电力滤波器在大容量时器件与装置容量之间的矛盾。
Active power filter in the suppression of power grid harmonics, improve power quality has a good prospect. Increasing the device capacity of the active power filter is one of the key technical issues to be solved in application. Based on the current domestic and foreign large capacity active power filter method, a large capacity shunt active power filter using a combination of multiple modular PWM main circuit units is introduced. The topology of the main circuit of the power filter is analyzed. The working principle and control method of the system are analyzed. The problems encountered in the realization of the device are also discussed. The field test results show that the active power filter realized by this method has good compensation characteristics and effectively solves the contradiction between the active power filter and the device capacity at large capacity.