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Research on Control Methods of Harmonic in Power System of Electric Propulsion Ship

Author: WuFuYuan
Tutor: ChenHui
School: Wuhan University of Technology
Course: Marine Engineering
Keywords: Marine Electric Propulsion Harmonic Simulation Filter
CLC: U665.1
Type: Master's thesis
Year: 2009
Downloads: 191
Quote: 3
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Abstract


With the rapid development of power electronics technology, and high-power AC motor frequency control technology matures, marine electric propulsion technology at home and abroad are highly valued and can develop rapidly. Marine electric propulsion system has the incomparable advantage of many of the traditional propulsion systems, domestic and international shipping industry research. According to the current form to see electric propulsion will be the main direction of development of the shipbuilding industry in the future. Therefore, in-depth research ship electric propulsion system has important practical significance. Nonlinear power electronics equipment widely used in various ship power, on the one hand to improve the production efficiency, improve the work environment; the other hand, some of the fundamental energy into harmonics injected into the grid, resulting in equipment to increase capacity and line losses, deterioration of power quality, affecting the power supply, safe and economic operation of the electrical equipment. Increasing the emergence of a large number of harmonics in the ship power electrical equipment the harmonic standard form sharp contradiction, harmonic pollution has become an important issue affecting the quality of power supply. How to effectively deal with the harmonics, harmonic control below the allowable limits, is a current topic of great practical significance. Ship electric propulsion system power grid harmonic problems already harmonic control methods were analyzed and summarized, and passive and active power filter simulation study, the experimental results in full compliance with the requirements of harmonic standards, confirmed the construction of the simulation model is reasonable and effective. Specific research work of the paper can be summarized as the following aspects: (1) discusses the phenomenon of ship electric propulsion system harmonic, harmonic generation, harmonic hazard limit harmonic standards and harmonic control method. (2) analysis of the ship power grid harmonic current control method, focusing on passive and active power filter, and compare the advantages and disadvantages of both. (3) characteristics of the passive filter, summarize the steps and methods of its design, and simulation experiments, the simulation results well in line with the the harmonics standard requirements to prove the validity of the simulation model. (4) combined with dynamic compensation of active power filter characteristics, the application of current hysteresis control method, shunt active power filter system simulation model was created in SIMULINK simulation environment, and its simulation experiments. The simulation results show that the parallel active power filter can effectively eliminate the harmonic current and reactive current, at the same time has a good dynamic compensation. (5) Hybrid Active Power Filter make full use of the advantages of passive and active power filter has high significance. Parallel and series resonant injection-type hybrid active power filter, modeling and simulation, and experimental results in full compliance with the requirements of relevant standards.

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CLC: > Transportation > Waterway transport > Marine Engineering > Electrical installations in ships,observation, communication equipment > Marine power installations
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