动态无功电流的瞬时采样直接法  

Dynamic var compensation control based on instantaneous sampling

作　　者：解大[1] 卢婧婧[1] 张延迟[2] 王承民[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海电机学院电气工程系,上海200240

出　　处：《电力自动化设备》2011年第8期29-32,共4页Electric Power Automation Equipment

基　　金：国家863目标导向类资助项目(2009AA05Z213)~~

摘　　要：通过分析单相动态无功补偿系统结构,提出了一种新型的单相动态无功电流检测算法,并将其应用于静止同步补偿器。所提算法通过三角函数的数学关系导出无功电流的计算方法,采用电压与电流的瞬时采样值直接得到无功电流的幅值,是一种动态无功电流的瞬时采样直接法。该算法的控制目标是使补偿装置发出的电流为系统的无功电流,结构简单且易于实现,并且不受负荷电流为容性或者感性的影响,总体响应时间为1/4正弦周期。数值仿真与在静止同步补偿器中应用的实验结果都表明,算法能够保持系统电流无畸变,无功补偿范围广。Based on the analysis of its system structure,a detection algorithm of single-phase dynamic reactive current is presented and applied to STATCOM.The reactive current amplitude is calculated directly from the instantaneous samplings of voltage and current by means of the mathematic relation of trigonometric function.Its control objective is to keep the output current same as the system reactive current.It is simple,easy to realize,and immune to capacitive or inductive load current.Its total calculation time is 5 ms.The numerical simulation and application experiment prove that,the system current keeps no distortion and the compensation range is large.

关 键 词：无功功率 补偿 电流检测 仿真 静止同步补偿器 采样 

分 类 号：TM743[电气工程—电力系统及自动化]