新能源并网发电对配电网电能质量的影响研究

配电网中的新能源并网发电情况越来越普遍,但新能源输出功率的间歇性和不确定性会对配电网电能质量带来很大影响.本文在分析新能源输出功率特性的基础上,对新能源并网造成配电网电能质量的影响原理进行了分析.建立配电网电能质量仿真计算模型,对新能源在不同位置和不同容量并网情况下及多个新能源不同方式并网下的节点电压偏差、节点电压总谐波畸变率仿真计算,获得了新能源并网发电对配电网电能质量的影响规律.本文研究成果可为新能源并网发电及配电网电能质量优化提供有效的理论指导和借鉴.

Influence of New Energy Generation Connected on Power Quality of Distribution Network

The scale of new energy grid-connected power generation in the distribution network become more and more common, but the intermittency and uncertainty of the new energy output power will have a great impact on the power quality of the distribution network. Based on the analysis of new energy output power characteristics, the influence principle of power quality of distribution network caused by new energy grid-connection is analyzed. The power quality simulation calculation model of distribution network is established, simulation calculation of the node voltage deviation and the total harmonic distortion rate of the node voltage under the situation that the new energy is connected to the network at different locations and capacities and under the different ways of multiple new energy sources. The research results of this paper can provide effective theoretical guidance and reference for new energy grid-connected power generation and power quality optimization of distribution network.