高原光伏发电并网对距离保护的影响分析

Analysis in the influence on plateau photovoltaic generation to the grid to distance protection

传统配电网是单一电源的辐射状网络,继电保护按照辐射型网络进行设计和整定。随着太阳能光伏电源的接入,辐射式网络变为电源和用户互联的网络,使配电网中潮流分布发生变化。文中分析了太阳能光伏电源对原有配电网中距离保护所带来的影响,根据太阳能光伏发电接入电网位置不同提出了解决方案。

Traditional distribution network is a radial network with a single power source and its relay protection is designed and set according to the radial network.With the connection of Photovoltaic generation（PG）,radial distribution networks will become such linking networks where generation nodes and load nodes are mixed and this made a change of power flowing distribution in the networks.The influence on photovoltaic generation source to the distance protection in the original distribution network is analyzed in this paper and some relative solutions are put forward according to the different location of PG accessing to power grid.