Intentional Islanding Methods as Post Fault Remedial Action: A Review

Abstract

<p>Intentional islanding is the last defense mechanism executed to avoid cascading failures and total blackout in power system network during severe or critical contingency. It is performed when other mitigation techniques are unable to save the network from collapse. Intentional islanding is preferred compared to unintentional islanding, which produces unstable islands. The objective of intentional islanding is to split the network by disconnecting appropriate transmission lines to produce electrically stable and balanced islands. There are many methods suggested by previous researchers on intentional islanding. This paper presents a comprehensive review on various intentional islanding methods proposed based on the common objective function used which are minimal power imbalance and minimal power flow disruption. The paper focuses on five intentional islanding methods which are analytical, numerical, heuristic, meta-heuristic and hybrid approaches. This review paper will serve as guideline and reference for researchers to explore further in this topic of interest.</p>

Power System Controlled Islanding using Modified Discrete Optimization Techniques

“…3, the initial solution obtained from the graph theory approach is used as the initial population, x i in the MDPSO technique. Then, the objective function (minimal power flow disruption) is then calculated for each candidate using the equation in (1). The initial pbest and gbest are determined and the mutation process is begun.…”

“…This cascading event causes the system to form few unstable islands (unintentional islanding) that finally lead the system to lose its stability and experience a blackout. According to the blackout cases happened around the world, cascading failures is the main reason for the blackout occurrence [1]- [2]. Therefore, prevention on cascading failures which causes the unintentional islanding is important in order to save the system from total collapse.…”

Load shedding scheme based metaheuristic technique for power system controlled islanding

“…Saharuddin) 1307 particle swarm optimization (BPSO) [13], angle modulated particle swarm optimization (AMPSO) [14], tabu search algorithm [15]. Detail explanation on the islanding techniques can be found in [16]. The main objective of these islanding techniques is to determine the suitable islanding strategy for a power system network.…”