基于数学模型的低压配电系统节电器的研究与应用  

Research and application of power saver for low voltage distribution system based on mathematical model

作　　者：喻明江[1] 董勤 冯万兴[1] 周盛[1] 熊佳俊 Yu Mingjiang;Dong Qin;Feng Wanxing;Zhou Sheng;Xiong Jiajun(Wuhan Nari Limited Company of state Grid Electric Power Research Institute, Wuhan 43007)

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074

出　　处：《电气技术》2018年第3期20-25,共6页Electrical Engineering

摘　　要：本文基于多绕组磁链耦合的原理,建立了一种低压配电系统节电器的数学模型,重点分析了零序等值电路的特性,说明其既可滤除负载的零序基波和谐波电流,又可避免因电源侧电压的零序分量产生较大的零序电流。Matlab仿真方法验证了理论分析的正确性。低压配电系统节电器使电源和负载之间构成了零序低阻旁路,将负荷产生的基波不平衡、三倍频高次谐波电流等零序电流导入,达到了滤波节电的效果。低压配电系统节电器具有滤除谐波、平衡三相不平衡负载,提高电能质量的作用。Based on the principle of multi-winding flux coupling, a mathematical model of low voltage power distribution system is established. The characteristic of zero order equivalent circuit is analyzed, which shows that it can filter out the zero-sequence first harmonic and harmonic load current, and reduces the zero-sequence current caused by the zero-sequence component of power source. The Matlab simulation method verifies the correctness of the theoretical analysis. The power saver for Low voltage power distribution system makes the zero sequence low resistance bypass between the power supply and the load, the fundamental imbalance current, the third harmonic frequency harmonic current and other zero sequence current generated by the load flow into the zero sequence low resistance bypass to save the electric power. The power saver for Low voltage power distribution system can filter out harmonic current, balance three-phase unbalanced load to improve the power quality.

关 键 词：低压配电系统节电器 数学模型 谐波 

分 类 号：TM64[电气工程—电力系统及自动化]