【摘要】 采用直流潮流模型的新息图法状态估计利用支路有功功率得到新息值,忽略了有功损耗,有一定误差。文章提出在电网的某些节点装设相量测量单元(PMU)后,利用PMU所得的电压和电流量测值,将直流潮流模型下的新息网络图变换为交流潮流模型下的新息网络图来进行状态估计,提高了拓扑变化的识别精度,并且在拓扑发生变化时同样可以给出较真实的网络运行状态。更多还原

【Abstract】 Former innovation graph state estimation adopting the DC load flow model utilizes branch active power to compute the innovation vectors, while the loss of active power is neglected so there are certain errors in calculation results. The authors propose that after installing phasor measurement units (PMUs) at some nodes, the innovation graph under DC load flow model can be transformed into a new innovation graph under AC load flow model by use of the measured values of voltages and currents with PMUs, then the state estimation can be conducted. Using this method the identification accuracy of topology transformation can be improved, and a more truthful power network operation state can be given while the network topology transformation occurs.更多还原