光伏接入对电能质量的影响及配电网凹陷域预估控制

Influence of PV Access on Power Quality and Predictive Control of Distribution Network SAG Area

文章主要研究光伏接入对电能质量的影响及配电网凹陷域预估控制。首先,从暂降幅值、持续时间和相位跳变方面的影响因素入手,分析分布式光伏不同接入容量和接入位置对电能质量与配电网凹陷域叠加的影响。其次,讨论故障点的凹陷域范围,并经过仿真计算故障节点临界距离,以达到缩小凹陷域范围的目的。最后,为准确评估分布式光伏接入对配电网凹陷域预估结果的影响,对不同因素下的凹陷域范围进行叠加处理,以获得准确预估结果。

This paper mainly studies the influence of photovoltaic access on power quality and predictive control of distribution network sag.Firstly,the influence factors of sags,such as sags amplitude,sags duration and sags,are analyzed,and the influence of different access capacities and locations of distributed photovoltaic on the superposition of power quality and sags is analyzed.Secondly,the range of fault point is discussed,and the critical distance of fault point is calculated by simulation to reduce the range of fault point.Finally,in order to evaluate the effect of distributed photovoltaic access on the prediction results of the distribution network sag,the different factors of the sag area were superposed to obtain the accurate prediction results.