A safety detection and evaluation method for the operation and maintenance of important lines in AC-DC joint construction converter stations

Abstract

The invention discloses a method for detecting and evaluating the operation and maintenance safety of important lines of an AC-DC combined converter station. The commutation failure sensitivity and line power transfer detection and analysis are carried out to obtain the commutation failure sensitivity index and line power transfer index; the overload rate and overload margin, line power deviation, branch sensitivity and line temperature rise are detected for the target line respectively. Analysis, obtain overload rate and overload margin index, line power deviation index, branch sensitivity index and line temperature rise index; adopt fuzzy multi-objective decision-making method to comprehensively consider each index for all the indexes obtained above, so as to select different time points The optimal evaluation index below is used to evaluate the importance of the line. This method selects and evaluates the most important degree of satisfaction index, which is used to guide the operation and maintenance personnel and the monitoring center to make the most reasonable choice.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a safety detection and evaluation method for the operation and maintenance of important lines of an AC-DC joint construction converter station. Background technique [0002] With the rapid development of the national economy and the rapid improvement of the degree of work, the user's demand for electricity is developing rapidly, and the scale of the power system is also increasing. At the same time, the objective conditions of asymmetrical and uneven distribution of resources will inevitably lead to the development of power grid structure varies from place to place, and there are "backbone" lines in power transmission in the area. The composition of the entire power grid, or even a small area of ​​the power grid, is becoming more and more complex. From the perspective of the system concept, the more complex the system, the higher the probability of component failure, and ...

AI Technical Summary

Problems solved by technology

[0003] At present, super-large converter stations are all AC-DC co-construction stations, and most of them are local power supply support points. It is true that the impact of line failures on the area and even the entire power grid is serious, but not all line failures will lead to serious consequences. Therefore, The degree of operation and maintenance of different lines should also be differentiated

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