Optimization of Voltage Sag Monitoring Points Considering Fault Uncertainty

This paper addresses the issue of unreasonable voltage sag monitoring point configuration caused by the neglect of fault uncertainty in existing observable area (monitor reach area, MRA) methods. An optimization approach is proposed that incorporates fault uncertainty into the configuration of voltage sag monitoring points. Firstly, a typical fault set is generated using the Monte Carlo method, from which the fault uncertainty MRA matrix and node SAFRI indicator weights are calculated. Next, by constraining both the traditional MRA matrix and the fault uncertainty MRA matrix, while prioritizing node indicator weights, the method minimizes the number of monitoring points and maximizes the weighted priority for voltage sag monitoring point optimization. Finally, the effectiveness of the proposed method is validated through an example using the IEEE 39-bus system. Experimental results demonstrate that the proposed method effectively addresses the issue of monitoring blind spots due to insufficient consideration of fault uncertainty in existing configurations.