Optimal Allocation of Real Time Measurement in Distribution Network Considering Network Observability

Power Internet of things measurement terminal device is a new type of information distribution network equipment. If all nodes in the distribution system are equipped with measuring devices, the state estimation problem will be greatly simplified, but this configuration method is difficult to achieve due to economic constraints, so it is necessary to study the optimal distribution scheme of measuring devices. This paper presents an optimized distribution scheme for new distribution measurement terminals, establishes the mathematical model of terminal distribution based on 0-1 integer programming, and formulates the principle and process of node configuration based on tree graph search technology. Based on the measurement characteristics of the Internet of things measurement terminal device applied to power distribution, the calculation methods to make the zero injection nodes and connected nodes observable in the network are deduced, and the terminal distribution methods suitable for large and small-scale systems are proposed. In order to meet the requirements of complete observability and economy of power distribution system, the proposed two methods are configured and compared in different common network architectures.