摘要
对目前文献中普遍提出的2种潮流转移识别方法—基于追加电流源补偿法估算线路电流和基于直流潮流分布系数法估算线路有功潮流,进行了深入的研究。对潮流转移因子进行进一步整理,发现在忽略支路电阻的情况下,其与潮流转移分布系数的计算公式相同。针对10机39节点系统进行编程计算,验证了上述结论的正确性。通过潮流转移的仿真计算,对上述2种方法的估算误差进行分析,认为估算电流的误差较大主要是由于其在计算时忽略了发电机节点注入无功功率的变化,并提出为估算线路有功潮流识别方法增加辅助判据,提高该方法的判断可靠性。
Two kinds of methods to identify power flow transferring,namely estimating line current based on compensation with add-on current source and estimating line active power flow based on DC power flow distribution factor,which are currently mentioned in existing references,are analyzed in depth.Through further arrangement of the calculation formula for power flow transferring factor,it is discovered that under the premise of ignoring branch resistances the calculation formula for power flow transferring factor is the same as that for distribution coefficient of power flow transferring,and the correctness of this conclusion is verified by simulation results of IEEE 10-machine 39-bus system.Simulation of power flow transferring is performed and the estimation errors of above-mentioned two estimation methods are analyzed.It is pointed out that the reason causing higher error of estimated current error lies in that the variation of reactive power injected at generator nodes is ignored during the calculation,and to improve the judgment reliability of line active power flow estimation based on DC power flow distribution factor an auxiliary criterion is proposed.
出处
《电网技术》
EI
CSCD
北大核心
2013年第2期411-416,共6页
Power System Technology
基金
国家自然科学基金项目(50777016)~~
关键词
识别方法
过负荷
补偿法
潮流转移因子
分布系数
identifying method
overload
compensation method
power flow transferring factor
distribution factor
