多台并联型APF联合补偿协调控制

Coordination Control of Combined Compensating by Shunt APFs

针对大容量有源电力滤波器(active pow er filer,APF)实际应用困难,从参考电流角度提出截断限流策略,确保多台APF联合运行的安全可行。根据APF补偿极限,提出补偿容量按比例分配的原则,达到大容量APF多补偿,小容量APF少补偿的目标。设计了由上层控制器进行协调控制的APF投切控制策略,保证能根据实际负荷谐波电流投切APF。最后,通过大量的仿真验证了截断限流补偿和补偿容量按比例分配的有效性,以及协调控制策略在多台APF联合运行中的可行性。

As large capacity active power filter （APF） is hard to put into put to practical use, truncating current limiting compensating is advanced to guarantee feasibility and security of combined running of APFs according to reference current. According to compensation limits of APFs, compensating capacities are proposed to be proportional distributed, so that large capacity APFs will compensate more, while small ones will compensate less. The control strategy for APFs＇ switching coordinated by upper controller is designed, which can ensure APFs switch according to actual load harmonic currents and impact slightly to system. In the end, a large amount of simulation results testify the validity of truncating current limiting compensating and proportion compensation capacities of APFs and the feasibility of coordination control strategy for combined running of APFs.