MAS-based Cooperative Optimization Of Reconfiguration In Active Power Distribution Networks

The flexible and scalable topology reconfiguration of power distribution networks with DGs is one of the essential tools for enhancing the power supply reliability upon network failures or outages. ADN has the ability of strengthening the accessibility of distribution network to the renewable, increasing the quantity of DG interconnection and operation efficiency, improving power quality and reliability, optimizing asset utilization, and delaying investment of distribution network. The traditional distribution network restoration can not meet the request of DG’s connection on a large scale, which is faced with huge challenges. The study of optimization and service restoration topology reconfiguration of power distribution networks with DGs is of great significance.In this paper, the above two topics are studied. This paper presents a multi-agent system (MAS) based optimization framework and incorporates the particle swarm optimization (PSO) algorithm to identify the optimal topology reconfiguration scheme in a cooperative manner. In finding the topology reconfiguration, the economy efficiency and the security of power supply are enclosed into the consideration. Analytical Hierarchy Process (AHP) is applied to determine a collection of feasible solutions which need to be further identified based on the additional constraint (i.e. the number of circuit breaker actions). The proposed optimization topology reconfiguration algorithm solution is evaluated through a set of simulation experiments by using the IEEE33-bus and PG&E69-bus networks as the test networks and the numerical result demonstrates the effectiveness of the suggested approach in finding the optimal topology reconfiguration solution with acceptable computational complexity and communication overhead. The service restoration topology reconfiguration is divided into three different situations according to type of DGs and the position of failures and the algorithm solution is evaluated through corresponding experiments by using the PG&E69-bus test network.The suggested approach is universal in a certain sense. Also, the approach is of great importance in the improvement of Ihe self-healing ability of AND as more and more DGs connecting to power distribution networks.