船舶电力系统谐波电流检测方法研究

Research on Harmonic Detection Methods Based on Ship Power System

针对船舶电力系统在非理想状态下三相电压畸变和负载突变情况,结合现有研究,提出一种改进的基于平均值模块的谐波检测方法。采用低通滤波器(LPF)串联平均值模块的结构替代传统平均值模块,同时采用三相电压锁相电路替代传统的锁相电路,从而提高其检测精度。仿真试验结果表明,采用所设计的方法在三相电压畸变、负载突变情况下进行谐波检测能提高检测精度。

An improved harmonic detection method is presented in order to reduce the influence caused by three-phase distorted voltage and sudden changed load.According to the present research conclusions,the low-pass filter(LPF)series averaging module is used to replace the traditional averaging module,and the three-phase voltage phase-locked circuit is used to replace the traditional phase-locked circuit,so as to improve the detection accuracy.The simulation results show that the method can increase the accuracy of detection under the situation of three-phase distorted voltage and sudden changed load.