分布式光伏接入容量、位置和方式对多台区网络的影响研究

Research on Influence of Distributed Photovoltaic with Multi-transformers Network on Condition of Different Capacity,Position and Access Mode

分布式光伏的大量接入改变了配电网潮流单一流向的局面,很大程度影响了线路潮流、电压和网络损耗。通过研究多台区分布式光伏网损计算方法,利用石家庄某村实际网络结构进行仿真,分析分布式光伏接入容量、位置和方式三项因素对网损和电压的影响,得出随分布式光伏接入容量增加网络损耗先减小后增大、光伏接入容量较大且单一并网点时应尽量在线路中端并网、有多个分布式光伏并网点时应选择平均分散接入馈线等结论。最终提出光伏出力就地消纳、根据接入容量确定接入位置、增加电压协调装置和网络重构等解决措施。

With the large scale of distributed photovoltaic accessing,the state of power flow,voltage and network loss of distributed grid has been changed obviously.Research on the calculation method of network loss with distributed photovoltaic has been introduced in this paper.By simulation with village network,the influence has been illustrated on the condition of different capacity,position and access mode.The conclusions are given as network loss are reducing with capacity growth for a while,but increasing in the end.Secondly,it should be accessed in the middle of line if the capacity of distributed photovoltaic is large.Thirdly,it is suggested tochose decentralized accessing mode.And the resolutions of reducing network loss are proposed as increasing local consumption,adding automatic voltage control device,developing grid reconfiguration function and so on.