考虑光伏并网的电力系统无功优化

Optimal reactive power dispatch considering photovoltaic integration

电力系统无功优化,特别是动态无功优化,对于系统的暂态安全性具有较大作用。目前,新能源接入电网,特别是光伏电池接入已成为一种趋势。但光伏设备出力通常具有较大的不确定性,对电力系统电压特性产生较大影响,因此有必要在电力系统无功优化中考虑光伏设备的不确定性,从而保证电力的安全稳定性。基于此,文章提出一种考虑光伏接入的电力系统无功优化方法,并提出一种三阶段求解算法对所提问题进行求解。所提算法在实际电网中进行分析并检验了可行性。

Reactive power dispatch,especially the dynamic reactive power dispatch,has vital effects on the transient security of power system.Currently,various renewable energy especially the PV cell integration into power grid system has become a trend.But the intermittency of the photovoltaic integration has great impacts on the power system voltage profiles.It is necessary to consider the uncertainties of photovoltaic integration in the reactive power dispatch of power system,so as to ensure the security of power system.In this perspective,an optimal reactive power dispatch method considering photovoltaic integration is proposed in this paper,and a three-stage solving process is proposed to solve the formulated model.The case study in a real-world power system demonstrates the validity of the proposed method.