分次补偿方式的并联型混合电力滤波器研制

介绍了由有源电力滤波器和无源滤波器并联构成混合滤波系统的工作原理，分析了有源和无源滤波器并联补偿谐波时谐波电流分配的问题，提出采用分次补偿的控制策略，并对系统控制策略的软件方法和控制电路的硬件实现进行了阐述。在此基础上研制了一台250kVA／380V并联混合型电力滤波器装置。该装置已应用于治理中频炉负载的工业现场。仿真和现场应用结果表明，采用该控制方法，可以在保证良好的补偿特性的同时，有效减少有源滤波器部分的容量，从而降低了整个装置的成本，更加适用于治理中大容量谐波负载的场合。

Development of a Parallel Hybrid Power Filter with Respective Harmonic Compensation Method

The working principles of a shunt hybrid power filter consisting of an active power filter and passive filters are introduced. The harmonic current distribution in the harmonic compensation of the shunt hybrid power filters is analyzed. A novel respective harmonic compensation control strategy is introduced to separate the compensation frequency bands of active and passive filters. According to the control requirements, the software method of the control strategy and the hardware implementation of the control circuit are described. A 250 kVA/380 V shunt hybrid power filter equipment consisting of an active power filter and two passive filters connected in parallel is developed for compensating a large power rating rectifier. The simulation and experimental results demonstrate that the control strategy proposed can reduce the power rating of active part effectively for harmonic mitigating of large capacity nonlinear loads with good compensation characteristics.