A Proposed Algorithm for the Self-Healing of Power Distribution Networks

Abstract

The proposed algorithm contributes towards an automated power distribution system, which optimally restores the power supply of the network by changing the existing topology, during an unplanned power outage. By automatic reconfiguration of the network, a fault can be isolated and power can be supplied to customers who are downstream of the fault section. BPSO technique has been implemented, which ensures maximum customer connectivity and minimum power losses while maintaining a radial topology which has acceptable voltage profile, allowable thermal limits and protection selectivity. Simultaneously, new protection settings are generated for the proposed network topology, thus preventing any compromise to grid's integrity. The proposed algorithm was tested for an IEEE 33-bus distribution network on MATLAB simulation platform. The generated network configuration achieved an optimal postfault topology. The proposed algorithm automates the process of power restoration and thereby reduces the work for engineers and improves the reliability of distribution networks.

A stochastic framework for secure reconfiguration of active distribution networks

“…Step 3) Since the distribution network structure should be radial, from the mathematical point of view, the reduced graph should be a spanning tree. In graph theory, a spanning tree is a graph in which all of its nodes are connected with minimum possible edges [20,21]. In such a graph, no loops exist.…”

Simulation of Self-Healing in Samawa City Distribution System

“…To obtain an optimal post fault configuration, different switching combinations will be tested to select a configuration which ensures a maximum customer connectivity and minimal power losses by satisfying a number of objectives with constraints [8,10].…”

“…Self-healing protection technique reconfigures the network by opening and closing switches to restore power to consumers, as quickly as possible, after an outage [8], according to heuristic algorithm [13]. To restore power to consumers; this requires upgrading manual switches to remotecontrolled switches [14].…”

“…Even so, the operating conditions of the entire network required for the solution of the problem are observed, with taking into consideration of their pre-fault conditions. The author in [8], proposed implementing a Binary Particle Swarm Optimization (BPSO) technique for reconfiguration of the network. The technique ensures maximum customer connectivity and minimum power losses.…”

Ajuste automático de la protección de sobrecorriente de tipo inverso en una red de distribución soterrada sujeto a la conmutación de equipos de seccionamiento / Ajuste automático de proteção de sobrecorrente de tipo inverso em uma rede de distribuição subterrânea sujeita a comutação de equipamentos de isolamento

“…En [5] se utiliza una técnica basada en MAS (Multi-Agent System) para la restauración del servicio en una red de distribución radial, esta técnica utiliza reglas que consideran la prioridad del consumidor y la presencia de generadores distribuidos. El algoritmo propuesto en [6] y el propuesto en [7] contribuye con la automatización del sistema de distribución de potencia mediante el cambio de la topología Brazilian Applied Science Review, Curitiba, v.6, n.1, p. 139 158 jan./feb. 2022 de la red existente ante un contingencia del sistema; mediante estos algoritmos y la reconfiguración de la red se puede aislar la falla optando por minimizar la pérdida de potencia y maximizar la conectividad de usuarios buscando el menor tiempo de reconexión.…”