基于稀疏PMU配置的电力网络实时拓扑分析方法

Real-time Topology Analysis Method for Power Network Based on Sparse PMU Placement

为了提高WAMS系统感知电网拓扑改变的能力,本文提出了母线有功负荷相对改变量指标用于判断母线负荷是否发生负荷构成改变,并基于此发展了一种新的电力网络拓扑实时分析方法。该方法依靠PMU测量量突变检测和潮流分析进行初步判别;对于拓扑改变后线路两端潮流仍处于合理范围内的特殊情况,则依靠假设验证法进一步进行区分和定位。仿真实验表明该方法能够有效地区分拓扑改变与大负荷增减扰动。

In order to improve the ability of WAMS system to perceive the power grid topology change, this paper proposes the relative variation indicator of active bus load, applied to identify the change of bus load structure. Furthermore, a novel real-time topology analysis method is advanced for power grid. Thereby the preliminary identification can be conducted on the basis of PMU measured topology perturbation detection and power flow analysis. But for the special case that the power flow change is within the reasonable range after the perturbation, the hypothesis-verification method is used to distinguish and locate topology change further. The simulation results show that the proposed method can effectively distinguish between the topology change and large load fluctuation disturbance.