In three-phase four-wire system four bridge arm APF circuit, in view of the three-phase system harmonic current rapid and accurate detection requirements, the application of a kind of combined with traditional ip-iq and synchronous detection of new detection method is used to realize the harmonic current detection. In order to APF output current in the circuit to instruction current tracking accuracy and rapidity requirements, combined with deadbeat control, three-phase four-wire system APF accurate and fast compensation are achieved. The simulation results show that application of the new test could be accurate to three-phase four-wire system to effectively quickly compensation, and can effectively improve the center line current.%目前三相四线制四桥臂有源补偿电路,针对三相系统对谐波电流快速与准确检测的要求,应用一种结合传统ip-iq和同步检测的新型检测方法来实现对谐波电流的检测,从而达到APF电路中输出电流对指令电流追踪的准确性和快速性要求.结合无差拍控制,实现三相四线制APF准确快速的补偿.仿真结果表明应用该新型检测法可以准确地对三相四线制系统进行有效快速地补偿,并且能有效改善中线电流.
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