三相不对称负荷系统无功补偿控制器设计  

Reactive Power Compensation Controller of Three-Phase Unbalanced Loads

作　　者：原嘉[1] 李俊[1] 刘小宁[2] 杨振宇 

机构地区：[1]南京工业大学自动化与电气工程学院,江苏南京211816 [2]中科院等离子体物理研究所,安徽合肥230031 [3]常州市供电公司,江苏常州213000

出　　处：《中北大学学报（自然科学版）》2013年第1期41-44,共4页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50977086);江苏省科技支撑(工业)计划项目(BE2009166)

摘　　要：针对交流电弧炉、电气化铁路等三相不对称负荷不断增加的现状,设计了一种新型无功补偿控制器,提出了一种p,q运算方式与广义瞬时无功功率理论相结合的新型优化算法,对三相电压、电流信号进行采样运算并进行优化,然后用DSP2812芯片计算出实时无功功率和功率因数,自动判定控制器是否发出电容器投切指令,达到无功补偿的目的.实验结果表明,该控制器通过对电容器的投切控制,将三相不对称负荷系统的功率因数由0.93提高到0.98,有效解决了三相畸变电流采集的问题,准确地实现了无功补偿控制功能.At present,more and more unbalanced loads are used,such as AC arc furnace,electric railway and so on.A new kind of reactive power compensation controller was designed,which proposed a new optimization algorithm that combined p,q calculating mode with generalized instantaneous reactive power theory.The three-phase voltage,current signal were sampled and optimized.Then,the real-time reactive power and power factor were calculated by using the DSP2812 chip.From these,whether the controller had sent the capacitor switching instruction was automatically determined,so as to achieve the reactive power compensation.The experiment and analysis show that the unbalanced three-phase load power factor is increased from 0.93 to 0.98,through the capacitor switching control.This effectively solves the problem of three-phase distortion current acquisition,and accurately realizes the function of reactive power compensation control.

关 键 词：三相不对称 无功补偿 p q运算 瞬时无功理论 DSP 

分 类 号：TM761[电气工程—电力系统及自动化]