低压电网无功功率自动补偿系统设计  

Design of reactive power automatic compensation system for low voltage power grid

作　　者：张琦[1] 都成刚[1] ZHANG Qi;DU Cheng-gang(NR Electric Co.Ltd,Nanjing 211100,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211100

出　　处：《电子设计工程》2018年第17期49-53,共5页Electronic Design Engineering

摘　　要：由于大量冲击性负荷被引用到工业领域,使传统补偿系统受外界因素干扰,造成补偿程度较低,为了从根本上解决该问题,需对低压电网无功功率自动补偿系统进行设计。根据自动补偿原理,设计系统总体结构框架。使用AT89S52型号CPU设计自动补偿控制器,分析控制器内部线性整流电路,通过A/D模块将电路中的电流转换为方波信号;计算控制器中功率因数,判断电容器组投切,采用循环投切方法对硬件中方波信号进行处理,直到信号队列空或满即实现低压电网无功功率自动补偿。由对比结果可知,自动补偿系统比传统系统补偿程度高出46%,可被安装在无功补偿装置中。Because a large number of impact loads are quoted in the industrial field,the traditional compensation system is disturbed by external factors and the degree of compensation is low.In order to solve the problem fundamentally,it is necessary to design the automatic compensation system for the reactive power of low voltage power grid.According to the principle of automatic compensation,we design the overall structural framework of the system.Using the AT89S52 model CPU to design the automatic compensation controller,analyze the linear rectifying circuit inside the controller,convert the current in the circuit to the square wave signal through the A/D module,calculate the power factor in the controller,judge the capacitor bank to cast and cut,and use the cyclic switching method to process the hardware wave signal of the hardware until the signal queue is empty.Or fully realize reactive power automatic compensation of low voltage network.According to the comparison results,the automatic compensation system is 46%higher than the traditional system,and it can be installed in the reactive power compensation device.

关 键 词：低压 电网 无功 功率 自动补偿 电容器 投切 

分 类 号：TN611[电子电信—电路与系统]