Improvement of Power Quality in Electric ship power system Using Controller of DSTATCOM

摘要

Distribution Static Compensator (DSTATCOM) is a shunt compensation device which is generally used to solve power quality problems in distribution systems.It is a device in correcting power factor, maintaining constant distribution voltage, and mitigating harmonics in a distribution network . In an all-electric navy ship has an integrated network, where the propulsion load, the distribution loads, sensor and other emergency loads, and pulse loads (rail guns, aircraft launchers, etc.) all are part of the same electrical network Among the loads, the effects of pulse loads are most detrimental for the power quality of ship power distribution system. . Powerquality issues arise due to high-energy demand loads such as pulse loadsthesepower quality problems mainly arise due to the pulsed loads, which causes the degradation of the entire system performance. This paper presents the application of DSTATCOM to improve the power quality in a ship power system during and after pulsed loads. The control strategy of the DSTATCOM plays an important role in maintaining the voltage at the point of common coupling. A novel adaptive control strategy for the DSTATCOM based on artificial immune system (AIS) is proposed. The optimal parameters of the controller are first found using particle swarm optimization. This provides a sort of innate immunity to common system disturbances. For unusual system disturbances, these optimal parameters are modified online, thus providing adaptive immunity in the control system. To evaluate the performance of the DSTATCOM and the AIS adaptive controller, a ship power system is developed in the.