摘要
近几年开始装备于电力系统的基于GPS的同步相量测量单元 (PMU)能够测量节点的电压相量 ,而且具有相当高的精度。从PMU可作为VΘ节点 (测量值作为潮流结果 )、潮流方程直接可解以及直接求解与VΘ节点相结合等三个方面分析了PMU高精度测量值在电力系统潮流计算中的应用 ,并从节点电压初值选择的角度讨论了PMU低精度测量值在潮流计算中的应用。算例表明 ,上述方法均可在不同程度上提高潮流计算的速度。其中效果最为显著是应用PMU高精度测量值的潮流方程直接求解方法 ,该方法不需迭代计算。效果最差的是PMU低精度测量值的初值用法 ,该方法与传统潮流计算差别不大。
GPS based synchronous Phasor Measurement Units(PMU) which have been successfully developed and equipped in power systems in recent years can provide bus voltage phasor measurements.The applications of PMU with high precision in power flow calculation are analyzed in the paper in the following ways.1)Consider the PMU buses as VΘ buses,2)Find the direct solution of power flow equations,3)Combine the direct solution of power flow with θ buses.The application of PMU with low precision is to take the measurements as initial values in the iteration of power flow.Some study cases indicate that all of these methods would improve the power flow calculation more or less.The most effective method is the direct(non iterative)solution of power flow using PMU measurements with high precision.The least effective method is to take the PMU measurements with low precision as initial values in the iteration of power flow.
出处
《东北电力学院学报》
2000年第2期6-9,14,共5页
Journal of Northeast China Institute of Electric Power Engineering
基金
吉林省科技发展计划资助项目! (990 52 5)
