Dsp-based Ship Non-linear Load Harmonic Suppression Study

The Multi-mode Integrated MERS (Marine Engine Room Simulation) lab is supported by the special funds of the Ministry of Communications. The background of development lies in the fast development of the shipping industry. Nowadays the manufacture of ship is improved in larger size, less fuel and higher efficiency, and multi-mode propulsion appears. The modern ship electric propulsion technology combines the most advanced digital control technology, network technology and the latest development in the fields of the drive and electromechanical control. Among which, the POD electric propulsion has been considered as the most advanced solution by the international shipbuilding and shipping fields.Since the application of high capacity power electronic elements in Electric Propulsion System and more and more utilization of all kinds of power electronic equipments in automatic marine engine room, these equipments convert the form of electric power through turning on or off of power electronic elements that have to produce reactive current and high harmonic, and result in distortion of power wave. It will seriously damage the power system and electric equipment. As a part of "Simulation of Multimode Marine Integrated Power System and Electric Propulsion System" which is supported by research project of Shanghai Municipal Education Committee (NO.03IK14) and Fund of Shanghai Science and Technology Development (NO.021107013), the research of harmonic suppression utilizing new theory and new technology has been described in this paper and develop an active power filter equipment based in DSP hardware and SVPWM algorithm.This dissertation has designed and successfully implemented the basic hardware and software system of the active power filter based on DSP hardware and SVPWM algorithm, explored a new technical method and provided a further development platform for enhancing the power quality and harmonic suppression. Main tasks of the dissertation are as following:1. The research of harmonic detection method based on instantaneous reactive power theory.2. The design and construction of hardware system based on DSP.3. The research of control algorithm of harmonic current compensation...