改善调度员潮流计算收敛性的措施

Practical improvement on convergence of dispatcher power flow calculation

就计算条件问题分析了潮流计算不收敛的成因,总结了PV节点和平衡机设置的若干原则,对系统改变运行方式过程中的电压和平衡机监控提出了一些人工干预的经验。根据广东省电力调度中心能量管理系统的实际情况,就状态估计数据对潮流计算的影响作了分析,编写了应用补丁屏蔽状态估计的PV节点配置和电压,实现了PV节点数据的自动保存。这些措施的实施极大地提高了潮流计算的收敛率,保证了调度员潮流应用的运行可靠性,使应用的操控更加以人为本。

This paper discusses the main factors which cause non-convergence in load flow calculation in terms of the initial data. Some principles for setting PV nodes and slack nodes, as well as some experiences in supervision and control on the power system voltage and slack node when changing operating mode, are generalized for convergence. In addition, this paper presents a couple of programs compiled in FORTRAN 77. As a patch to the dispatcher power flow application, these programs shield the undesirable PV node and PV voltage data acquired from status estimate application. By setting PV node configuration of their own, operators may obtain more practical calculation results as the convergence of the dispatcher power flow calculation improved greatly. With the help of the programs, maintenance and operations of the application become much more convenient.