No abstract

Security assessment of Naval-ship power system under different fault conditions is important for real time operation of Naval-ship power system. The existing indices of security assessment did not incorporate the probability of disturbances: therefore this paper proposes a probabilistic security assessment index. As the Naval ship architecture is integrated with DC zonal distribution, then a special power flow analysis is needed for the AC/DC IPS system. The paper addresses the incorporation of power flow analysis of Naval-ship power system with power electronic devices, security analysis of architecture based on the expected contingency margin, and rank of different contingencies and their implication on system security. The approach is tested on one of the DC zonal naval ship power system topologies.

No abstract

No abstract

No abstract

Economic dispatch (ED) is an important optimization task in power system which involves determination of the optimal combination of power outputs for all generating units which will minimize the total fuel cost while satisfying load constraints. There are three criteria in solving the economic load dispatch problem. They are minimizing the total generator operating cost, total emission cost and multi-objective (cost and emission). This paper proposes Moth Flam Optimization (MFO) algorithm for solving the economic dispatch problem with valve point effects and emissions. It determines the optimal generation schedule of generating units by minimizing three criteria. Two test systems consisting of 6 generating units and isolated microgrid have been used to illustrate the effectiveness of the proposed MFO method. The results obtained from MFO is compared with different algorithms. The results show better global convergence and also gives good optimum solution by reducing system generation cost and emission cost.

No abstract

No abstract