电力系统潮流收敛性的实用性改进

本讨论在能量管理系统的高级应用软件设计中改进潮流计算的收敛性问题。实用中潮流不收敛的主要原因是：缓冲机设置不当、初始功率不平衡和环网开断。改进措施是：合理选择缓冲机位置、预先处理不平衡功率和专门处理环网开断算法。通过对华北、华中、山东和华东等电网的实际计算，证明了新潮流软件的收敛性能得到了极大的提高。

PRACTICAL IMPROVEMENTS UPON CONVERGENCE OF LOAD FLOW CALCULATION

In this paper the convergence of loadflow calculation is discussed.Calculating load flow inEnergy Managenent System(EMS),incorrect selec-tion of slack bus,outage of electromagnetic loop andunbalance of initial power are the reasons of non-con-vergence. Thus correctly selecting slack bus,prepro-cessing the unbalanced initlal power and using specialalgorithm for loop outage are the improving measures. The measures mentioned above are successfullyapplied to practical load flow calculation of CentralChina power system,East China power system,etc.,and the effectiveness of the measures is proved by theresults of these calculations.