A robust measurement placement method in distribution system state estimation

A robust measurement system can take account of the influence on Distribution System State Estimation (DSSE) caused by network reconfiguration. This paper proposes an optimization algorithm to determine the number and position of the measurement devices separately. The concept of measurement saturation is proposed, and the position of measurement devices is determined based on a heuristic algorithm constrained by the saturate number. Both network reconfiguration and the uncertainties introduced by the measurements are taken into account. The probabilities of different network configurations are given by Markov chain, and the uncertainties introduced by the measurements are simulated by Monte Carlo algorithm. The results obtained on IEEE33-bus system demonstrate that saturate number is usually one third of the number of nodes for a system, and the robust measurement placement method considering different network configurations can improve the precision of DSSE.