计及电压稳定裕度的配电网光伏发电选址与定容  

Locating and Sizing of Photovoltaic Power Generations by Considering Voltage Stability Margin of Distribution System

作　　者：白晓清[1] 吴雪颖[1] 李佩杰[1] 杨秀菊[1] 

机构地区：[1]广西电力系统最优化与节能技术重点实验室(广西大学),广西南宁530004

出　　处：《现代电力》2015年第4期34-41,共8页Modern Electric Power

基　　金：国家自然科学基金项目(51367004);广西自然科学基金项目(2011GXNSFA018026)

摘　　要：本文针对光伏出力的随机性和负荷的波动性,考虑光伏出力及负荷在不同状态下发生的概率,提出了一种多场景光伏发电-负荷混合概率模型。采用电压灵敏度分析法寻找电压支撑点,作为光伏发电接入的候选节点集,提高光伏选址的效率。以改进VPII指标为目标函数,将多场景光伏发电-负荷混合概率模型加入功率潮流平衡方程,建立光伏发电的选址和定容模型。最后,以IEEE14辐射型配电网系统为算例,验证了本文所提模型的合理性和有效性。仿真结果表明,合理选择光伏的接入位置和容量,能够有效提高配电网的电压稳定裕度,提升其稳定性并降低网损。For the stochastic characteristics of the power output of photovoltaic generation and the volatility of load, a hybrid probability model of multiple scenarios photovoltaic power generationload is proposed by considering the occur rence probabilistic of the load and photovoltaic power in dif ferent states. The supporting points of the system voltage are found by using voltage sensitivity analysis method, which are taken as the candidate buses of the photovoltaic installa tion to increase the efficiency of photovoltaic locating. Tak ing improved voltage profile improvement index （VPII） as an objective function, the locating and sizing models of pho tovoltaic power generation are built by adding the hybrid probability model of multiplescenarios photovoltaic power generationload into power flow equations. In the end, the rationality and effectiveness of the proposed model is veri fied by taking the IEEE14 radial distribution grid test system as calculation case. The simulation results show that the reasonable choice of locating and sizing of photovoltaic power generations can effectively improve the voltage stability margin of distribution system, increase the voltage stability, and reduce the loss.

关 键 词：光伏发电 配电网 改进VPII指标 光伏发电-负荷混合概率模型 候选节点集 电压稳定 

分 类 号：TM715[电气工程—电力系统及自动化]