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针对电气化铁道谐波和无功的特点，提出了一种能够有效降低变流器容量的高压隔离注入型有源滤波器，阐述了其滤波原理，提出了相应的谐波电流检测方法．ＰＳＰＩＣＥ仿真结果验证了系统的补滤效果
Aiming at the characteristics of harmonic and reactive power in electrified railway, a high voltage isolation injection type active filter which can effectively reduce the converter capacity is proposed. The principle of the filter is introduced and the corresponding harmonic current detection method is proposed. PSPICE simulation results verify the system’s filter effect