Electrical Drive System Research Of Scientific Investigation Ship

According to the early scientific investigation and distribution system on the ship, to use more convention all variable frequency drive mode, because scientific research vessel belongs to a special type of ship, the ship environment test equipment to the work requirements are relatively high, electric propulsion system of conventional variable frequency drive covering a larger and heavier in weight space layout, is not suitable for the new scientific research ship active front end, and the variable frequency drive system will become the future scientific expeditionon the ship electric propulsion development direction of variable frequency drive. This paper relies on the "scientific survey ship design project", the electric drive system of scientific investigation ship to do an in-depth study, the main research work and achievements are as follows:(1) First introduced the electric propulsion of several types of applied in the world more, further analysis of the characteristics of main equipment and scientific exploration ship power system several subsystems, for scientific investigation ship electric propulsion system development, especially for the practical application of scientific investigation ship electric propulsion system, and lay a solid foundation.(2) According to ship Oriental provides scientific survey ship design task request, after the study on the distribution system structure frame, according to the equipment load of marine engineering, outfitting, air-cooled professional feedback, the calculation method of using three types of load method, the power load under different working conditions of the ship were calculated, and choose the number of generator and the power.(3) Because of high power nonlinear load will produce harmonic, through the introduction of the harm of harmonic, including the impact of scientific research vessel, according to the IEC standard and China classification rules on the harmonic requirements, respectively introduces the often used on ship harmonic suppression and elimination method, and analyzes their principles, advantages and disadvantages.(4) According to the scientific survey ship equipment function and use the principle of hull structure, meet the requirement of space and equipment arrangement, the difference between the basic situation of active front end inverter driving scheme and mode with the conventional variable frequency drive, through the implementation of the paradigm of theoretical analysis and practical application, to determine the final out electric propulsion motor.