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ogy can achieve the online adaptive identifica‐<br />

tion for control in real time power plant opera‐<br />

tion and offline identification for fault diagnosis.<br />

Enacheanu et al [21] proposed a distribution sys‐<br />

tem architecture that can make the reconfigura‐<br />

tion in the power easy <strong>to</strong> achieve. The reconfigu‐<br />

ration in that work is <strong>to</strong> locate and isolate the<br />

faults in the power system. A remote agent is<br />

used in that work as a central controller for the<br />

reconfiguration of power systems.<br />

Nagata et al [22] proposed MAS based res<strong>to</strong>ra‐<br />

tion methodology for power systems. The MAS<br />

proposed was composed of bus agents and a<br />

single facilita<strong>to</strong>r agent. The bus agent decides a<br />

suboptimal target configuration after faults oc‐<br />

cur. A facilita<strong>to</strong>r agent was developed <strong>to</strong> act as a<br />

manager for the decision process. The existence<br />

of the facilita<strong>to</strong>r agents make the methodology<br />

centralized. Liu et al [37] put forward another<br />

res<strong>to</strong>ration method for the power system. How‐<br />

ever, this method is also centralized because the<br />

res<strong>to</strong>ration decision is made with the help of<br />

coordinating agents that have global information<br />

in the MAS.<br />

Nagata et al [50] improved the method proposed<br />

in [22]. In the MAS proposed in [50], the coordi‐<br />

nation functions were distributed <strong>to</strong> several fa‐<br />

cilita<strong>to</strong>r agents instead of one facilita<strong>to</strong>r agent.<br />

The facilita<strong>to</strong>r agents coordinate with each other<br />

au<strong>to</strong>nomously. However, each facilita<strong>to</strong>r agent<br />

works as centralized coordina<strong>to</strong>r in the local<br />

area. So the MAS proposed in that work is not<br />

completely decentralized. The proposed res<strong>to</strong>ra‐<br />

tion can only be applied <strong>to</strong> a radial power sys‐<br />

tem. Also, the reconfiguration method was<br />

tested on a small power system simulated on a<br />

PC. The agents’ performance in the res<strong>to</strong>ration<br />

for a large power system was not provided.<br />

Wang et al [24] proposed a fuzzy logic and evolu‐<br />

tionary programming based reconfiguration<br />

methodology for distribution systems. In this<br />

<strong>MIMET</strong> Technical Bulletin Volume 1 (2) 2010<br />

research, a fuzzy mutation controller is imple‐<br />

mented <strong>to</strong> adaptively update the mutation rate<br />

during the evolutionary process. The objective of<br />

the reconfiguration is <strong>to</strong> reduce the power loss<br />

in the distribution system. Zhou et al [25] put<br />

forward another fuzzy logic based reconfigura‐<br />

tion methodology for distribution system. A<br />

fuzzy logic based reconfiguration was developed<br />

for the purpose of res<strong>to</strong>ration and load balanc‐<br />

ing in a real‐time operation environment. Kuo<br />

and Hsu [26] proposed a service res<strong>to</strong>ration<br />

methodology using fuzzy logic approach. In this<br />

research, the fuzzy logic based approach was<br />

estimated the loads in a distribution system and<br />

devised a proper service res<strong>to</strong>ration plan follow‐<br />

ing a fault.<br />

Various methods have been applied <strong>to</strong> the re‐<br />

configuration process of the terrestrial power<br />

system. However, most of the reconfiguration<br />

methodologies are centralized. A central control‐<br />

ler is a requirement <strong>to</strong> gather data from the<br />

power system, make reconfiguration decisions<br />

after calculation and analysis.<br />

Shipboard Power System Reconfiguration<br />

Compared <strong>to</strong> the terrestrial power systems, the<br />

SPS has its unique characteristics. Based on the<br />

unique characteristics of the SPS, some recon‐<br />

figuration methods have been proposed. Some<br />

of the significant literature of the SPS reconfigu‐<br />

ration process of the SPS is reviewed below.<br />

Butler and Sarma [27] propose a heuristics based<br />

general reconfiguration methodology for<br />

AC radial SPSs. The reconfiguration process is<br />

applied <strong>to</strong> the SPS for service res<strong>to</strong>ration. The<br />

reconfiguration process is based on the initial<br />

configuration and desired configuration details<br />

of the system, such as the list of load con‐<br />

nected /disconnected <strong>to</strong> the SPS, list of available<br />

component (cables, circuit breakers, etc) in the<br />

SPS, etc.<br />

| MARINE FRONTIER @ <strong>UniKL</strong><br />

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