This paper proposes a new application of bees algorithm (BA). In this application, the multi-objective bees algorithm (MOB A) is developed for solving the multi-objective optimal power flow (MOOPF) problems on small and large scale power system. The objectives of MOOPF are to minimize the total fuel cost of generation, environmental pollution and power system loss by considering many constraints i.e. limits on generator real and reactive power outputs, bus voltages, transformer tap-setting and power flow of transmission lines. Proposed crowded selection mechanism and fuzzy mechanism techniques are added into selection process of proposed MOBA. Also, the algorithm based on fuzzy set theory is used to extract the best compromise solution. In order to prove the proposed MOBA method, the simulation result of weight aggregation is used for comparison. The standard IEEE-30 and IEEE-1I8 bus system is selected to test the algorithm. The result shows that Pareto front of proposed MOB A are diverse and well distributed. The proposed MOB A have good performance and efficiency to solve multi-objective optimal power flow.
Hazard is evaluated for electrical design of a major system upgrade of Thailand oil & gas production plant. The primary technique for the hazard evaluation was a Hazard and Operability (HAZOP) study; this is a brainstorming approach conducted by a multidisciplinary team. The approach simulates creativity of the team members to generate new ideas. As a result of this study, numerous, qualitative recommendations have been made to electrical design the safety and operability problems out of the major power system upgrade. Among the recommendations are suggestions on protection and control strategy, materials of construction, process material releases, alternative design options, and maintenance of this power system upgrade.Keywords: Systematic approach, Safety and operability study for electrical design, Hazard and operability study.
When power demand is foreseen to rapidly increase in near future, the need to upgrade the electrical system/ equipment became apparent. When operation must proceed while any change is in progress, the revision is very difficult. Parallel operation of electrical equipment of various vintages and ratings is inevitable for some extent of time. The special considerations and review on the monitoring, metering and control of new master PLC controller called power management system (PMS) are discussed. Electrical distribution system concepts and equipment modifications and upgrades which improve system operability, enhance reliability and contribute to safety are described.
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