摘要
光伏发电是可再生能源中最有发展前景的一种新能源发电形式。高密度分布式光伏发电系统接入配电网可能引起电压偏差越限的问题。建立了考虑分布式光伏发电系统多点接入的馈线电压偏差计算模型,并分别分析了过电压及低电压条件约束条件下不同型号架空及电缆线路光伏电源的准入容量及最大渗透率,根据建立的计算模型采用PSS/E软件进行仿真计算,计算结果表明:利用光伏电源的调压作用可防止过电压,减短馈线长度可防止低电压;电缆线路的光伏电源准入容量主要受过电压因素的限制,而架空线路主要受低电压因素的限制。
PV generation is the most promising new energy generation form. Distribution network with multiple distributed PV generation system can cause over-limit voltage. Under this condition, a feeder voltage deviation calculation mode is proposed in this paper and the maximum penetration levels of different types of overhead lines and cables without causing over-voltage and low voltage are calculated. Moreover, the paper conducts simulating calculation utilizing PSS/E. The results show that over-voltage can be avoided by controlling the PV generation system output according to the connection point voltage,and low voltage can be prevented by reducing feeder length. By comparison of related calculation results,the paper concludes that the maximum penetration levels of overhead lines depend mainly upon over-voltage constraint,while cables’ maximum penetration levels on low voltage constraint.
出处
《电网与清洁能源》
2014年第11期118-122,共5页
Power System and Clean Energy
基金
国家高技术研究发展计划(863计划)(2011AA05A308)~~
关键词
分布式光伏发电
过电压
低电压
光伏渗透率
distributed PV generation
over-voltage
low voltage
PV generation penetration level
