Optimal Placement Of Distribution Network Automation Terminal Considering Reliability And Observability

Power supply companies consider distribution network automation as an investment strategy to improve reliability and observability effectively.Moreover,the distribution network automation terminal plays an important role in the distribution automation system(DAS).However,the current optimal placement methods of distribution network automation terminals mainly consider the improvement of power supply reliability by distribution network automation terminals and ignore the improvement of observability by distribution network automation terminals.Furthermore,these methods cannot make full use of resources.A comprehensive optimization configuration method for distribution network automation terminal considering both reliability and observability is lacking.In response to the above problems,this paper proposes an optimal placement method of distribution network automation terminal considering reliability and observability.This method optimizes the configuration of various types of distribution network automation terminals in the distribution network with branch lines.The objective function of the proposed method is to minimize the total cost considering the technical and economic constraints.The total cost includes equipment cost and interruption cost.Among many automation devices,the proposed method considers the first remote automation terminal,the second remote automation terminal,the third remote automation terminal,and the transformer terminal unit(TTU).Mixed-integer nonlinear programming(MINP)is used to model,and a large-scale commercial solver is used to solve the built model.The equipment optimization configuration plan includes the optimized configuration number and location of the distribution network automation terminal.The proposed method is applied to the relevant examples to verify the proposed method’s effectiveness and practicability.The simulation results show that the optimal configuration plan of the equipment obtained by the proposed method can effectively improve the reliability and observability of the distribution network.Moreover,the optimal configuration plan of the equipment obtained by the proposed method can guide the actual project well.The main contributions and innovations of this paper are summarized as follows:(1)In this paper,a mixed-integer nonlinear model is proposed to solve the optimal configuration problem of different types of distribution network automation terminals.The optimal configuration scheme of the distribution network automation terminal can ensure that the distribution network has high power supply reliability and high observability,with the lowest investment cost and high return on investment.(2)In this paper,the differences between different types of distribution network automation terminals are fully considered.The problem of how to quantify and model the coordination relationship between different types of distribution network automation terminals is solved.The locations that have a significant impact on the reliability and observability of the distribution network will be found,and the distribution network automation terminal will be configured.The optimal configuration scheme of the distribution network automation terminal can better guide the practical project.(3)This paper solves the problem of how to quantify and model the impact of branch feeders on the placement of distribution network automation terminals and avoids the insufficient estimation of reliability and observability in manual planning.The optimized configuration scheme of the distribution network automation terminal is more realistic and can better improve the reliability and observability of the distribution network.