Distribution Network Voltage Controller in Presence of Lost Measurements

This paper presents a centralized voltage control scheme that uses pseudo-measurements to estimate lost voltage measurements. The controller automatically selects the bus voltages which best approximate the lost one according to dissimilarity indices computed from the system's voltage sensitivity matrix. Several computer simulations were carried out to test the performance of the controller subject to the loss of single and multiple measurements in a radial distribution network with dispersed generation. For single losses, the proposed approximation resulted in better performance of the controller as compared to simply considering the measurement unavailable. For multiple lost measurements, proper selection of association limits allowed for acceptable estimations and successful controller performance.