集群LED路灯谐波与超高次谐波的发射特性研究

Research on Harmonics and Super High Harmonics of Cluster LED Street Lights Emission Characteristics

随着节能降耗的环保政策的快速落实,发光二极管(LED)路灯已经成为低压配电网中一类重要的非线性负荷。LED路灯的驱动电路常采用升压型功率因数校正(Boost-PFC)技术,功率因数高,但是高频率的开关管的通断会产生40次以上的超高次谐波,功率因数校正(PFC)技术调制死区的存在也会导致网侧电流出现低次谐波。从理论上分析了基于Boost-PFC型的集群LED路灯的网侧谐波和超高次谐波特性,并通过仿真和实际测试的结果证明了理论分析的准确性。

With the rapid implementation of environmental protection policies for energy conservation and consumption reduction,light-emitting diode(LED)street lamps have become an important non-linear load in low voltage distribution networks.The driving circuit of LED street lamp often adopts Boost-PFC(Boost type power factor correction)technology,and the power factor is high,but the switching of high frequency switching tube will produce more than 40 times of super high harmonics,the presence of the PFC(power factor correction)technology modulation dead band also causes low-order non-characteristic harmonics in the grid side current.The grid-side harmonics and ultra-high-order harmonic characteristics of cluster LED street lights based on Boost-PFC were theoretically analyzed,and the accuracy of the theoretical analysis was proved through simulation and actual test results.