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Studies on Modeling and Analysis for Voltage Level Series Optimization of District Power Supply Network

Author: SuYuePing
Tutor: GuanLin
School: South China University of Technology
Course: Proceedings of the
Keywords: Voltage sequence optimization 20kV medium voltage distribution To simplify grid voltage level Mathematical Modeling and Analysis
CLC: TM715
Type: Master's thesis
Year: 2011
Downloads: 64
Quote: 1
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Abstract


Grid design and operation goal is to meet the security, reliability, under the premise of stable operation of power transmission will be compliant with the greatest economic benefits to each user. The increasingly nervous energy resources, land resources and environmental constraints makes the main power plant capacity is constantly increasing and further away from the user (load center), led to the continuous improvement of the grid voltage level, so that by the limited transmission channel, conveying greater power. Every household at the end of the of the grid requires a small capacity, the safety of electrical energy, which in turn clamped to live a voltage level of the end of the distribution network. Thus forming the structure of the grid voltage level of the power system from transmission to distribution progressively buck and distribution of electrical energy. With the rapid economic development of the modern city, facing a series of challenges to the power grid construction. One of the most prominent issues: the high cost of land \If through the optimization of voltage level, reducing the voltage level or an appropriate increase in the voltage level of the medium-pressure, in theory, can reduce the the substation number and line back a few of the city, thereby significantly reducing the demand of land for construction of power grids. It can be said that simplify and optimize the configuration of the grid voltage level is an important and effective technical means to solve the puzzle of land for construction of power grids. Meanwhile, 20kV medium voltage makes the success of the pilot in the Suzhou Industrial Park, raising the city's power grid voltage level possible. The papers from the Guangdong Power Grid Corporation of the city grid using 20kV voltage level of technical and economic feasibility studies and the voltage level optimization research. The city common 500kV/220kV/110kV/10kV/0.4kV voltage level sequence, thesis aims to analyze the feasibility and scope of 20kV instead of 10kV level and simplify the 110kV level Also the 35kV currently not suitable as a medium-voltage distribution voltage level analysis of argumentation. The paper first summarizes the voltage level configuration status at home and abroad, and then summarize the different pressure voltage level select technical and economic analysis of the relevant theoretical results and the main parameters. Subsequently, the mathematical modeling of the emerging areas of for urban high load density, voltage distribution network from the point of view of the economy argument 20kV superiority, as well as analysis of the scope of application of the simplified 110kV level. Then, through the new Knowledge City and Guangzhou Metro area, voltage level optimization studies summarized in the emerging area of ??the city high load density voltage sequence optimization principles and recommendations. Finally, the example structure for low load density areas of the city in remote areas to assess the feasibility and scope of a city in remote areas 20kV distribution. The contents of the thesis for the assessment of urban pressure distribution network promotion of 20kV argument, and simplify the scope of application of the 110kV level to guiding significance and value of engineering applications.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Theory and Analysis > Power system planning
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