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Study on the Transformer Economic Operation Mode and Its Optimal Switching Strategy in Electric Distribution Network

Author: ZuoChuYun
Tutor: WangChengMin
School: Shanghai Jiaotong University
Course: Electrical Engineering
Keywords: Economic operation interval Energy-saving profit Optimal switching strategy Reactive power compensation
CLC: TM406
Type: Master's thesis
Year: 2010
Downloads: 195
Quote: 1
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Abstract

The transformer is widely used in electrical equipment in the power system. Transformer a wide range of distribution, and frequent application of power loss is accounted for as much as 30% of the total loss of the entire power grid, the economic operation of the transformer is of great significance to the energy consumption of the entire grid. Generally, the economic operation of the transformer means in the transmission power is the same conditions, by preferentially select the optimum operating mode and adjust the load, so that the energy losses of the transformer to a minimum. Which merit to select the operation mode of the transformer economic operation, but also the focus of this thesis. Merit select a run called economic operation, the transformer loss minimum run. Select transformer economic operation is achieved by dividing the economic operation interval, so extensive literature for the economic operation of transformer, the transformer economic operation interval classification method study accounted for the vast majority. Economic operation interval division, the critical load point to make switching action that is able to keep running in the way of economic operation, this saving benefits the transformer. Shortcomings extensive literature is often limited to the divided transformer economic operation interval economy running interval can only provide the critical load points and run, and can not be a one-to-one correspondence with the time point. Therefore, relying solely on the division of the range of economic operation, the actual operator is not clear at what moment what kind of switching, it is not effectively guide the economic operation of the transformer. However, the division of economic operation range is economical operation mode is selected on the basis of its significance can not be ignored. A series of improved research of this thesis are expand on this basis. This dissertation first division distribution transformer economic operation interval compared comprehensive research and presentations, and on this basis, the processing load curve and the critical demarcation points combined, \saving benefits, \\action causes the breakage and saving benefits of transformer life calculation method for a set of switching strategies saving profit to provide a basis for calculation; \transformer within several switching strategy enables optimal switching strategy to obtain maximum power saving profit concept and presents a genetic algorithm-based calculation principle; account reactive compensation transformer optimal switching strategy \These four innovative content as the focus of this thesis and innovation, it successively and gradually improve, and played the role of complement and refine the existing achievements of the previous reference to the entire grid energy saving significance.

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