SVG的电压控制策略  

Voltage control strategy of SVG

作　　者：马春明[1] 解大[1] 余志文[1] 张延迟[2] 

机构地区：[1]上海交通大学国家能源智能电网(上海)研发中心,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》2013年第3期96-99,107,共5页Electric Power Automation Equipment

摘　　要：提出一种控制静止无功发生器(SVG)输出电流的策略,既能实时补偿负荷无功,又能改善负荷接入电网点的电压波形。根据装置工作原理推导了控制策略及其可行性。根据负荷峰值电压判断负荷接入处电压是否跌落。电压稳定时装置工作在常规无功补偿状态下,输出负荷所需的无功电流;当接入网点电压因补偿区域的故障或者负荷突然加重等导致电压跌落较大时,装置可在输出所需无功的基础上短时消耗储能以维持补偿点电压。仿真结果表明所设计的复合功能装置具有响应速度快、动态特性好的优点。A control strategy of SVG output current is proposed,which compensates in real time the reactive power of dynamic load and improves the voltage waveform of its grid-connected point. The control strategy and its feasibility are derived from the working principle of SVG. The voltage drop on grid- connected point is detected according to the peak voltage of load. When the voltage is steady,the device outputs the reactive power required by load;when the voltage drops due to system fault or load augment, the device consumes temporarily the stored energy to maintain the voltage stable. Simulative results show that the designed device has fast response and good dynamic performance.

关 键 词：静止无功发生器 低电压穿越 仿真 电压控制 补偿 

分 类 号：TM76[电气工程—电力系统及自动化]