基于概率潮流的SVC选址方法研究

基于确定性潮流分析法的传统静止无功补偿器(SVC)的选址尚未考虑系统运行中随机变量的影响,电网运行中不确定性因素的日益增加凸显了传统方法的局限性。对此,提出一种基于概率潮流的SVC选址方法。该方法根据线性参与因子筛选出预选节点集,采用半不变量法计算每个预选节点安装SVC后的负荷裕度概率特征,并据此进行SVC选址。算例分析表明,该方法可给出不同节点安装SVC后系统的概率负荷裕度特征,刻画了随机变量的变化对SVC选址结果的影响,具有较好的应用前景。

The Study of SVC Allocation Method Based on Probabilistic Load Flow

The traditional SVC allocation method does not consider the effect of stochastic variables in power system operation based on deterministic load flow analysis. The limitations continue to enlarge with the increase of power system uncertainties. In view of the situation, an SVC allocation method based probabilistic load flow is proposed. The method screens out several buses as preselected set according to linear participation factors. Then the load margin probability characteristics of preselected buses are calculated by using semi-invariant method. The SVC allocation is decided by the probabilistic results. Simulation results of test system indicate that this method can provide the system probabilistic load margin characteristic after SVC installation of different buses. Moreover, it can consider the effect of stochastic variables change to the SVC allocation results. Thus, the method has a good application prospect.