并网光伏电源对配电网保护的影响

Influence of Grid Connected Photovoltaic Power Supply on Distribution Network Protection

随着清洁能源的迅猛发展,将清洁能源运用至电力系统发电的分布式电源逐渐成为电力行业关注的热点。其中,光伏发电具有资源丰富、便于采集等特点,得到了大力推广。目前我国光伏电站的数量越来越多,在为电网带来巨大效益的同时也带来了挑战。由于光伏电源具有波动性与不确定性,当其接入电力系统时很可能会对配电网带来一定的风险。为此,阐述了光伏系统的相关理论,分析了并网光伏电源对配电网保护的影响,讨论了并网发电系统的保护措施,为后续并网分布式能源的研究奠定了基础。

With the rapid development of clean energy,distributed power sources that apply clean energy to power generation in the power system have gradually become a hot spot in the power industry.Among them,photovoltaic power generation has the characteristics of rich resources and easy collection,and has been vigorously promoted.At present,the number of photovoltaic power plants in China is increasing,which brings huge benefits to the power grid as well as challenges.Due to the volatility and uncertainty of photovoltaic power,when it is connected to the power system,it is likely to bring certain risks to the distribution network.To this end,the relevant theories of photovoltaic systems are expounded,the influence of grid-connected photovoltaic power sources on the protection of distribution networks is analyzed,and the protection measures of grid-connected power generation systems are discussed,which lays the foundation for the subsequent research on grid-connected distributed energy.