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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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