Method for determining electric insulation reliability of power transmission line
A technology for electrical insulation and transmission lines, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as line insulation failure, power loss, line outage, etc., to improve safety and reliability, significantly economical and The effect of social benefits
Inactive Publication Date: 2016-07-06
SOUTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP CORP
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Problems solved by technology
With the erection and development of UHV backbone grids, the insulation failure of the lines will cause line outage in light cases, and cause systemic power failure risks in severe cases
Method used
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[0070] In the following, the method of the present invention will be described in detail by taking the ±800kV Nuozhadu DC line as an example in conjunction with the accompanying drawings.
[0071]A method for determining the electrical insulation reliability of a transmission line, comprising the following contents:
[0072] 1. Determine the pollution flashover reliability of the entire line:
[0073] (1) Divide the polluted area, and count the salt density data of each polluted area and the corresponding configuration of insulator strings:
[0074] The division of polluted areas of ±800kV Nuozhadu DC Line is shown in Table A-1:
[0075] Table A-1 Line length of polluted area of the whole line
[0076]
[0077] Contamination division and design salt density combination along the line are shown in Table A-2:
[0078] Table A-2 Design value of salt density in polluted area
[0079]
[0080] The statistics of the number of pole towers, straight towers, corner towers a...
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The invention discloses a method for determining the electric insulation reliability of a power transmission line. The method comprises the following steps: dividing pollution areas, counting salt density value data and insulator string configuration conditions of various pollution areas, building a pollution flashover evaluation probability analysis model to determine the pollution flashover reliability of an overall line; dividing ice areas, counting icing-thickness historical data, the salt density value data and the insulator string configuration conditions of various ice areas, and building an ice flashover evaluation probability analysis model to determine the ice flashover reliability of the overall line; and counting the species and number of towers adopted by the line, counting the topography distribution condition along the line, and building a lighting flashover evaluation probability analysis model to determine the lighting flashover reliability of the overall line. According to the method disclosed by the invention, the problems in configuration performance evaluation and risk and weak link prediction of transmission line insulation equipment are mainly solved; the line insulation level can be configured in a targeted manner; the operation and maintenance risk and key links of the power transmission line can be found out by 'suiting the remedy to the case'; the safety and the reliability of the power transmission line are improved; and the method has significant economic and social benefits.
Description
technical field [0001] The invention belongs to the technical field of transmission line engineering, and in particular relates to a method for determining the electrical insulation reliability of a transmission line. Background technique [0002] With the development of my country's national economy, the power industry has also entered a stage of rapid development. UHV power transmission technologies such as ±800kV DC and 1000V AC have been widely used in the State Grid and South China Grid, and UHV backbone grids are gradually being formed. The UHV transmission line has the characteristics of large transmission capacity, long transmission distance, and high investment cost. Once an accident occurs in the UHV line, it will cause regional power outages, and even endanger the stable operation of the entire power grid, causing more serious consequences. Therefore, It is very important to ensure the safe and reliable operation of UHV lines. [0003] In the engineering design s...
Claims
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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 唐巍梁明李育兵胡全许泳朱长青刘从法王军成鲁俊罗鸣徐毅盛道伟
Owner SOUTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP CORP