光伏电站接入孤立电网的动态建模与稳定性分析  

Analysis on dynamic modeling and stability of isolated grid with photovoltaic station connected

作　　者：盛四清[1] 侯磊[1] 范辉[2] 唐宝锋 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]河北省电力科学研究院,河北石家庄050021

出　　处：《电力系统保护与控制》2012年第23期126-131,共6页Power System Protection and Control

基　　金：河北省电力公司科技计划(KJ2010-112)

摘　　要：为了分析光伏电站接入孤立电网的可靠性和稳定性,开发了基于PSASP的光伏电站仿真模型及其储能系统控制策略。利用PSASP的用户自定义模型(UDM),设计了完整的适于工程应用的光伏阵列模型、逆变器装置模型、MPPT控制模型以及蓄电池储能装置模型。分析了储能系统的工作原理,确定了蓄电池储能系统的容量配置方法和并网控制策略,并对实际孤立电网进行了仿真分析。仿真结果表明,在发生光照强度变化和三相短路故障的情况下,蓄电池储能系统能够维持电网的功率平衡以及并网点的电压水平,减小故障后的系统振荡,确保了孤立电网的稳定性,证明了该系统及其控制策略稳定可靠。A simulation model of photovoltaic （PV） station and a control strategy of energy storage system are developed in order to analyze the reliability and stability of isolated grid with photovoltaic （PV） station connected. Using the User Defined Model （UDM） based on PSASP, the photovoltaic array model, inverter model, MPPT controller model and storage battery system model are designed, which can be suitable for engineering application. The operation principle of energy storage system is analyzed. The capacity allocation method and grid-connected control strategy of storage battery system are determined. Simulation analysis results based on a practical isolated grid indicate that the battery energy storage system is capable of maintaining grid power balance and a constant voltage, reducing the oscillation of the system after faults, ensuring the stability of the isolated grid, when the change of the sunshine intensity and three-phase short-circuit fault happen respectively. The system and its control strategies are proved stable and reliable.

关 键 词：光伏电站 孤立电网 PSASP仿真 用户自定义模型 稳定性 

分 类 号：TM615[电气工程—电力系统及自动化] TM712