摘要
随着电力电子设备如变频器、整流器、UPS等在电力系统中的广泛应用,导致电力系统谐波分量迅速增长,使电压和电流小型产生畸变,它不仅增加了电网的供电损耗,而且干扰电网的保护装置与自动化装置的正常运行,造成了这些装置的误动与拒动,直接威胁电网的安全运行。目前,谐波的问题日益突出,谐波的治理受到了各国家的重视,制定了相关的标准和规定,以限制注入电网的谐波电流。减小或抑制谐波对电力系统和负载影响的方法主要有两种:一是采取措施减少电力电子装置产生的谐波;二是采取输入输出滤波的方法滤除谐波。
As the power of electronic equipment such as inverters、rectifiers and UPS and so on widely used in power systems,it led to the rapid growth of power system harmonics and the small distortion voltage and current. It not only increases the loss of power supply,but also disturbances the normal operation of the device and automation devices of power grid. It results in a malfunction and refusing to move of these devices,which get a direct threat to the safe operation of the grid.Currently,the problem of harmonics is increasingly prominent. Various countries attached importance to the treatment of harmonics and developed the relevant standards and regulations to limit harmonic current injected into the grid. The methods which reduce or suppress harmonics of power systems and the impact on the load are mainly to take measures to reduce the harmonics generated by power electronic devices firstly and secondly take the input and output filtering method to filter harmonics.
出处
《盐业与化工》
CAS
2014年第7期51-53,共3页
Jounral of Salt and Chemical Industry
关键词
谐波
电力系统
危害
滤波
治理
harmonic
power system
hazard
filter harmonics
control
