Method of increasing capacity of transmission line considering safety check and economic analysis

Abstract

The invention provides a method of increasing capacity of a transmission line considering safety check and economic analysis, which includes ensuring a capacity increasing demand of the transmission line and a temperature constraint check, obtaining a maximum load rate which satisfies temperature constraint and a failure rate constraint checking, obtaining a maximum load rate which satisfies the failure rate, choosing a transmission line load rate which satisfies both the temperature constraint and the failure rate constraint, carrying out an economic verification, and obtaining a final increasing program of the transmission line. A real-time temperature of line is calculated according to the heat balance equation, a short term failure rate of line is calculated by establishing a short term failure rate model of transmission line which is based on PHM, profits of increasing capacity of the transmission line is evaluated by three indexes of transmission revenue, line loss cost and life loss cost. The method of increasing capacity of the transmission line considering safety check and economic analysis belongs to the evaluated field of loading capacity of power transmission and transformation equipment.

Description

technical field [0001] The invention belongs to the field of loadability evaluation of power transmission and transformation equipment, and in particular relates to a method for increasing the capacity of a power transmission line in consideration of safety check and economic analysis. Background technique [0002] The capacity-increasing operation of transmission lines is an effective method to alleviate the contradiction between the lagging power grid construction and the rapid growth of load demand. At the same time, improving the transmission capacity of existing transmission lines is of great significance for saving land resources and metal resources and improving the economic benefits of existing power grid enterprises. In the process of capacity increase operation, the safety and economy of transmission lines have always been issues that need to be paid attention to and solved. At present, there are many models and analysis methods for the loadability analysis of tra...

AI Technical Summary

Problems solved by technology

This method does not consider the impact of the increase in the operating temperature of the transmission line on the short-term failure rate of the line, and does not discuss the rationality of the operation method of increasing the capacity of the transmission line from an economic point of view

[0004] The capacity-increasing operation of the transmission line will lead to an increase in the operating temperature of the line. On the one hand, it may exceed the maximum allowable temperature of the transmission line, resulting in a rapid increase in its short-term failure rate. On the other hand, it will cause the loss of tensile strength of the transmission line, shortening The normal service time of the transmission line, resulting in an increase in the long-term failure rate and loss of equipment life

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