超谐波引发的电能质量问题及相关研究

Power quality problems caused by supraharmonics and related research

电网中电力电子化电器设备不断增多,电力线载波通信技术应用日益普及,越来越多的超谐波发射注入电网中,其引发的新的电能质量问题日益突出。在全面梳理超谐波发射干扰造成电器设备非人为通断、电力线通信失败、电能表计量准确性下降及滤波设备烧毁等故障,归纳盘点国内外在超谐波的产生机理、传播特性、等效电路及仿真模型、测量方法和标准制定等方面研究结果的基础上,发现超谐波造成的电能质量问题仍未引起足够重视,目前相关研究仍处于起步阶段,然而电器设备的电力电子化与智能控制是大势所趋,超谐波发射引发的电器设备故障、运行不正常等将有增无减,因此需及时加大研究力度,以应对超谐波所引发的电能质量新问题所带来的多方面挑战。

With more and more power electronic appliances and power line carrier communication(PLC)technology are applied in power systems,more and more supraharmonics emission are injected into the gird,which have caused many new power quality problems.In this paper,the interference caused by supraharmonics is reviewed,such as electrical equipment unintentional switched on and off,PLC interrupted,power meter accuracy declined and filter burned,etc.,the generation mechanism,propagation characteristics,equivalent circuit and simulation model,measurement methods and standardization of supraharmonics are also summarized.We notice that the power quality caused by supraharmonics has not been given sufficient attention,and related research is still in its initial stage.However,power electronics and intelligent control of the grid is the trend,the interface and mal-function of the electrical equipment caused by supraharmonics will be more seriously than ever.Therefore,the aim of this paper is to call for scientists at home and abroad to work together to cope with this challenge and to find solutions.