Evaluation method for insulator icing flashover risk of ultrahigh voltage alternating-current transmission line

A UHV AC and ice-covered flashover technology, which is applied in the direction of measuring electricity, measuring electrical variables, and testing dielectric strength, etc., can solve the problems of little historical data of ice flashover, difficulty in realizing, and error in evaluation results, etc., and achieve real-time evaluation , High prediction accuracy, easy to use effect

Active Publication Date: 2016-07-20
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, there is little historical data on ice flash on UHV transmission lines, the risk assessment model established therefrom is not representative, and the error of the evaluation results is also large; in addition, there is a lack of online monitoring devices for icing on UHV transmission lines, However, the UHV line used as the backbone grid frame for power transmission in the

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  • Evaluation method for insulator icing flashover risk of ultrahigh voltage alternating-current transmission line

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[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] Such as figure 1 As shown, the UHV AC transmission line insulator icing flashover risk assessment method according to the embodiment of the present invention includes the following steps:

[0035] S1. Meteorological and line basic data collection: investigate the basic data of UHV AC transmission lines to be evaluated, and obtain real-time meteorological data of the corridors along the transmission line through the automatic weather observation station of the meteorological department or the micro-meteorological online monitoring device of the power grid company;

[0036] S2. Judgment on th...

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Abstract

The invention discloses an evaluation method for an insulator icing flashover risk of an ultrahigh voltage alternating-current transmission line. The method comprises: S1, carrying out meteorological and line basic data collection; S2, carrying out determination of an insulator icing flashover initial condition; S3, carrying out insulator icing flashover voltage calculation; and S4, carrying out insulator icing flashover risk evaluation. According to the invention, on the basis of the real-time meteorological data, an insulator icing flashover risk is evaluated by combining basic data of the ultrahigh voltage alternating-current transmission line and the powerful guidance can be provided for disaster prevention and reduction of the power grid operation management department. The method can be realized simply with high feasibility; and the prediction result has the high reference value.

Description

technical field [0001] The invention belongs to the field of disaster prevention and mitigation of power grids, and in particular relates to a risk assessment method for ice-covered flashover of insulators of UHV AC transmission lines. Background technique [0002] UHV transmission has the advantages of large transmission capacity, long transmission distance, and high transmission efficiency. It has become the main power transmission method in my country to alleviate problems such as unbalanced distribution of energy bases and load centers, increasing transmission capacity, and increasingly tight line corridors. During the "Twelfth Five-Year Plan" period, the State Grid Corporation invested 500 billion yuan, 40,000 kilometers of UHV transmission lines have been built and are under construction, and the transmission capacity is 430 million kVA. Networked energy allocation pattern. During the construction of UHV transmission lines, due to the increasingly tense line corridors...

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Application Information

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IPC IPC(8): G01R31/12G08B21/18
CPCG01R31/1245G08B21/182G08B21/185
Inventor 卢恩泽王海涛谷山强赵淳郭钧天田浩陶汉涛吴大伟章涵张磊陈玥何君
Owner STATE GRID CORP OF CHINA
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