分布式光伏电源谐波对剩余电流动作保护器的影响

Effect of Distributed Photovoltaic Power Harmonic on Residual Current Protective Device

介绍了分布式光伏并网电源的谐波特性,分析了分布式光伏并网电源谐波对剩余电流、剩余电流动作保护器(RCD)的影响。为了解决分布式光伏电源谐波对RCD的影响,研制了抗谐波型RCD,并进行了抗谐波功能分析测试。测试结果表明,抗谐波型RCD的谐波分析功能在实际应用中体现良好的效果,避免了RCD因谐波干扰而误动作,提高了RCD的投运率和线路的供电可靠性。

This paper introduced the harmonic characteristics of distributed photovoltaic grid power,and analyzed the effect of distributed photovoltaic grid power on the residual current and residual current operated protective device（ RCD）. To solve the effect of distributed photovoltaic grid power harmonic on RCD,the anti-harmonic type RCD was developed,and the anti-harmonic function test was carried out. The test results show that the harmonic analysis function of anti-harmonic type RCD has a good effect in practical application,which avoids the misoperation of RCD,and improve the operational percentage of RCD and the reliability of power supply.