含新能源场站的变电站无功优化

Reactive power optimization of substations containingnew energy stations

随着新能源大规模地接入电网,传统潮流计算已不能满足配电网的需求,配电网无功配置的有效性降低,进而影响整个配电网的安全稳定性。为此,文章对含新能源场站的变电站潮流影响特性进行分析,建立新能源场站接入地区电网的PCC节点模型,以面向支路前推回代法作为配电网潮流计算方法;分析含新能源场站接入的变电站无功补偿特性,基于等量分组方式对无功补偿电容器作出规划。最后以某变电站为例,对所提计算方法的可行性进行验证,充分证明了该方法的有效性。

With the large-scale access of new energy into the power grid,traditional power flow calculation can no longer meet the needs of the distribution network,and the effectiveness of reactive power allocation of the distribution network is reduced,thus affecting the safety and stability of the entire distribution network.Therefore,this paper analyzes the influence characteristics of power flow in substations including new energy stations,establishes the PCC node model of new energy stations connected to the regional power grid,and uses the branch forward push-back method as the power flow calculation method of distribution network.The characteristics of reactive power compensation in substation with new energy station access are analyzed,and the reactive power compensation capacitors are planned based on equal quantity grouping.Finally,taking a substation as an example,the feasibility of the proposed calculation method is verified,which fully proves the effectiveness of the proposed calculation method.