p-q-r谐波电流检测方法及改进设计

p-q-r Harmonic Current Decetion Method and Its Improving Design

针对p-q-r法在电网电压畸变情况下存在的检测误差,运用p-q-r理论对其加以改进。采用由锁相环生成的无畸变三相电压参考信号代替实际电压检测信号参与检测运算,以避免电网电压畸变对检测精度的影响。提供了改进前后的仿真对比结果,其结果验证了改进的p-q-r检测方法的优越性,具有一定参考价值。

This article uses the p-q-r theory to improve the p-q-r method which has the detect error under the circumstance of network voltage distortion. This paper replaces the actual voltage detection signal by the phase-locked loop production arthro- scopic three-phase voltage reference signal to participate in the examination operation, in order to avoid the influence of network voltage distortion to the detection precision. It provides the improving simulation contrast result which not only has confirmed the advantage of the improving p-q-r method, but also has certain reference value.