适应多类型电网故障的储能系统预测电流控制与LVRT策略  

A low voltage ride through technology adapting to multi-grid fault of battery energy storage system

作　　者：刘其辉[1] 葛立坤[1] 郭晓芸 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]国家电网客户服务中心南方分中心,江苏南京211100

出　　处：《电力系统保护与控制》2014年第10期96-103,共8页Power System Protection and Control

基　　金：国家自然科学基金资助项目(50807012);supported by National Natural Science Foundation of China(No.50807012)

摘　　要：为了实现储能装置的功率转换系统(Power Conversion System,PCS)在电网发生对称和不对称故障时的低电压穿越LVRT(Low Voltage Ride Through,LVRT)控制,考虑到目前PCS控制方面的不足之处,通过分析预测电流控制原理,推导α-β坐标系中PCS瞬时功率方程,设计了一种电网故障情况下PCS的LVRT控制策略。建立基于PSCAD的84 kW储能电池PCS系统,针对电网多类型故障进行仿真;在已有控制策略经过仿真验证之后,又将该策略移植到硬件设施中进行实验。仿真结果表明,该控制策略可以有效实现储能系统的低电压穿越功能。In order to realize low voltage ride through （LVRT） by controlling the power conversion system （PCS） of the energy storage device in the situation of both the balance and unbalance grid voltage fault, considering the shortage of power conversion system （PCS）, and by analyzing the predictive current control principle, this paper derives PCS instantaneous power equation in α-β coordinate system and designs a strategy to realize LVRT fault control. Then it builds a single battery module （84 kW） control system based on the PSCAD to simulate multiple types of grid fault. After the existing control strategy is simulated and verified by the software simulation, the strategy is transplanted to the hardware facilities in the experiment. The results show that this control strategy can effectively achieve the LVRT function in the energy storage system.

关 键 词：储能系统 电网故障 功率转换系统 预测电流控制 低电压穿越 

分 类 号：TM711[电气工程—电力系统及自动化]