Real-time optimal reactive power control for distribution networks

Abstract A computer algorithm for optimal reactive power and voltage control, suitable f OR large distribution networks, is presented in this paper. The proposed algorithm starts with implementing a partitioning and Kron's reduction technique in order to reduce the size of the problem. The algorithm decouples the capacitor problems from the regulator problems and it uses a dynamic programming technique to maximize the reduction in line losses in a real-time environment. The net outcomes of the algorithm are the capacitor bank locations, rating and switching scheme and location of voltage regulators, and tap settings that maximizes the loss reduction. The algorithm ensures that the voltage levels for all buses in the system are within permissible limits at all times. The algorithm is efficient, fast and reliable and can be easily implemented by any utility to optimize line loss reduction on distribution feeders.