Analysis, operation and maintenance method for grounding state of 500kv transmission line towers

Abstract

This application relates to the analytical operation and maintenance method of the grounding state of the 500kV transmission line tower, including the following steps: according to the lightning operation data in the area where the 500kV transmission line section is located, calculate the maximum allowable grounding resistance limit of the 500kV tower of the 500kV transmission line section; The measured grounding resistance value of the tower is compared with the grounding resistance limit value to determine the grounding state of the 500kV tower; according to the grounding state, differential operation and maintenance of the 500kV tower is carried out. In view of the requirements for line lightning protection and grounding characteristics in power grid operation and maintenance work, determine the grounding status of 500kV towers, realize the operation and maintenance of 500kV transmission line towers, and provide support for the formulation of other operation and maintenance work plans for 500kV transmission line grounding, improve line operation The efficiency and scientificity of the maintenance work, thereby ensuring the normal and effective operation and maintenance of the power system.

Description

technical field [0001] This application relates to the field of 500kV transmission lines, in particular to an analysis, operation and maintenance method for the grounding state of towers of 500kV transmission lines. Background technique [0002] In order to transmit the electric energy from the power plant to a distant place, the voltage must be raised to become high-voltage electricity, and then the voltage is lowered as needed near the user. This work of raising and lowering the voltage is done by the substation. In my country, common AC power transmission and transformation voltage levels include 1000kV, 750kV, 500kV, 330kV, 220kV, 110kV, 66kV, 35kV, 20kV, and 10kV. The 500kV substation is generally a hub substation. Its main functions and functions in the power system are: 1. Collect the main lines from several power plants, and connect with several key points in the power grid, and also connect with the power grid of the next level of voltage; 2. As a large 1. The con...

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Problems solved by technology

[0003] In the early stage of 500kV transmission line project design, the lightning protection check in the design is only a safety check of the comprehensive lightning protection grounding performance of the entire project line, and cannot ensure the lightning protection safety of each base tower in operation and maintenance. However, there is an urgent need for 500kV power transmission at present. Risk rating of tower grounding status in line operation and maintenance, to analyze the risk of tower grounding status, and realize operation and maintenance on this basis

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