潮流计算是电网规划与运行分析的基础,目前一些系统分析工作需要收敛的潮流工况.针对电力系统研究所潮流及暂态稳定程序(power system department,Bonneville Power Administration,PSD-BPA)中运行方式安排时出现的无功潮流无解问题,提出一种无功潮流收敛性的二阶段自动调整方法.对于不收敛的潮流,首先通过节点类型转换将500 kV输电网上含无功补偿的节点转为PV节点,获取量化无功不收敛的指标.其次,按电网分区将转换类型的节点逐步还原,以还原节点的电压幅值及各分区的电压水平为参考制定第一阶段调整策略;通过Floyd算法确定输电网无功调整路径且由节点补偿量进行修正,获得第二阶段调整策略并使潮流恢复收敛.最后,以某省实际电网验证算法在无功潮流收敛性调整方面的有效性.
Two-stage Automatic Adjustment Method for Reactive Power Flow Convergence Based on PSD-BPA
Power flow calculation is the foundation of power grid planning and operation analysis and some system analysis work requires convergence of power flow conditions.This paper proposes a two-stage automatic adjustment method for the convergence of reactive power flow to address the problem of reactive power flow instability in the operation mode arrangement of PSD-BPA.For non-converging power flows,the nodes with reactive power compensation on 500 kV transmission network are firstly transformed into PV nodes through node type conversion to obtain quantitative indicators of non-converging reactive power.Secondly,the conversion type nodes are gradually restored according to the grid partition,and a one-stage adjustment strategy is formulated based on the voltage amplitude of the restored nodes and the voltage level of each partition as a reference.By using the Floyd algorithm to determine the reactive power adjustment path of the transmission network and correcting it with node compensation,a two-stage adjustment strategy is obtained and the power flow is restored and converged.Finally,the effectiveness of the algorithm in adjusting the convergence of reactive power flow is verified using an actual power grid in a certain province.
PSD-BPAconvergence of reactive power flownode type conversiontwo-stage automatic adjustment
万方数据
维普
