Observability Analysis and Optimal Meter Placement in Active Distribution Networks

Abstract

In this paper, the observability analysis method based on meter placement was employed. Each consumer is classified, and the Distributed Generation (DG) is considered as a special negative load with constant power, which contains two types: photovoltaic (PV) power and wind turbine generation (WTG). The load variation is represented using typical load patterns. An efficient graph partitioning method is adopted to partition the weighted tree in the performing meter placement to achieve the network observability. Then an algorithm of optimization meter placement based on observability degree is presented to improve the state estimation accuracy. Finally, the validity of the proposed method has been tested in the IEEE 33-bus distribution network.