Rearch And Development Of Skin Effect Power Tracing System

In this thesis, the theory of Skin Effect is introduced, and the Skin Effect in Power Tracing is analyzed, so as the new designment of Skin Effect Power Tracing System is put out, and the hardware, software system designment of the Tracing System is introduced in detail. On the basis of Skin Effect theory analyzing, the thesis put out that the Skin Effect Tracing System could be improved by changing the wave shape of the current. That is to substitute the sine wave current with square wave current. Also the thesis make model for the pipeline temperature control system, simulae the system, and make experimentation for validation.The first chapter is about the summarization. It includes the history, applied background, and application of the Power Tracing System. The economic factor of the Power Tracing System and the traditional Steam Tracing System is compared, and the tasks of thesis are proposed at the end of the chapter.In chapter Two, theory of Skin Effect is analyzed. On basis of the circuit model of Skin Effect Current Heating, the Skin Effect is analyzed at the point of electromagnetic, so as to push the way of using square wave current in Skin Effect Tracing System. The measurement of circuit and distribution of electronic are discussed.Chapter Three introduces the modeling and simulation of the control system. After making up the model of the control system, several control strategy and arithmetic are introduced, and results of the system simulation is obtained.Chapter Four introduces the realization and applying of the Skin Effect Power Tracing System, which include the selection of the power component, designment of the control circuit and programming of the control system. Tt uses PLC as the control kernel, and IGBT as the power component. A serial of techniques are applied to improve the stability and robust of the system, and control flexibility of the system is realized. The application of Skin Effect Power Tracing System includes some designment about the load, such as the capacity of the system and the heat preservation of the pipeline.Chapter Five is the result of the experiment.Chapter Six is about the conclusion of the thesis. On basis of the current research, some suggestions for the system's improvement are given, and the future of the Skin Effect Power Tracing System is analyzed, so as to direct the work in the future.