分布光伏并网在配网继电保护中的影响作用分析

Analysis of the Influence of Distributed Photovoltaic Grid Connected in the Relay Protection of Distribution Network

电能质量、网损以及供电等指标影响配网继电保护效果,现有分析方法数据追踪能力不佳,为解决上述问题,提出分布光伏并网在配网继电保护中的影响作用分析。选择电能质量、网损、供电可靠性以及安全性参数,设置分布光伏并网的影响作用评估指标;采用分布光伏并网等效算法,跟踪继电保护过程中的最大功率;基于前推回代构建影响作用分析模型,实现对影响作用的跟踪分析。实验结果表明方法面对25%、50%、75%以及100%的电压和逆变电流,能够准确追踪到正确的波形,而现有分析方法只能追踪到正确的电压波形,研究方法得到的影响作用分析结果与实际数据更接近。

Power quality,network loss,power supply and other indicators affect the effect of distribution network relay protection.The data tracking ability of existing analysis methods is poor.In order to solve the above problems,the impact analysis of distributed photovoltaic grid connected in distribution network relay protection is proposed.The parameters of power quality,network loss,power supply reliability and security are selected,and the impact evaluation index of distributed photovoltaic grid connection is set;The distributed photovoltaic grid connected equivalent algorithm is used to track the maximum power in the process of relay protection;Based on the forward backward generation,the impact analysis model is constructed to realize the tracking analysis of the impact.The experimental results show that the designed method can accurately track the correct waveform for 25%,50%,75%and 100% voltage and inverter current,while the existing analysis methods can only track the correct voltage waveform.The analysis results of the influence effect obtained by the research method are closer to the actual data.