Transformer maintenance decision method for optimizing reliability and economy

Abstract

The invention discloses a transformer maintenance decision method for optimizing reliability and economy. The transformer maintenance decision method comprises the following steps: (1) establishing a failure rate function and a reliability function considering preventive maintenance; (2) determining the maximum maintenance period of a transformer so that the transformer meets certain reliability; (3) performing regular preventive maintenance on the transformer in the maximum maintenance period, and performing optimization solution on the optimal preventive maintenance period by using maintenance cost minimality as a target function; and (4) determining the maintenance priority of transformer components through quantitative analysis of failure mode of internal parts of the transformers so that the maintenance schedule is more definite. The transformer maintenance decision method can solve the disadvantage that the decision of the preventive maintenance period of the transformer has no regard for the reliability change of the transformer and the influence on the system, and the maintenance of the transformer is optimized in the two aspects of reliability and economy.

Description

technical field [0001] The invention relates to the field of power equipment maintenance optimization with comprehensive consideration of reliability and economy, specifically refers to a transformer maintenance decision method for optimizing reliability and economy, and belongs to the technical field of power system reliability maintenance. Background technique [0002] With the gradual expansion of the grid scale, the scope of accidents and losses caused by transformer failures will also increase. In order to achieve reliable and stable power supply in the power system, the reliability requirements for transformer operation will become more and more stringent. How to reasonably arrange the maintenance of the transformer will directly affect the safe and reliable operation of the power system. [0003] In the long-term operation of the transformer, it is affected by factors such as loss, self-aging and hidden faults. The reliability level gradually decreases with time. In o...

AI Technical Summary

Problems solved by technology

However, the working environment of the online monitoring device is very harsh, the accuracy of the measurement signal and the stability of the data will be affected, the monitoring data fluctuates greatly, and there is a big difference in the variation law and fluctuation range of various online monitoring data and offline test data

In addition, the cost of fully implementing condition-based maintenance is high and some key technologies have not yet broken through, so planned maintenance must be implemented for a long period of time

At present, the planned maintenance of transformers is usually carried out in accordance with the power equipment maintenance regulations. The power equipment maintenance regulations of China Southern Power Grid Co., Ltd. divides the planned maintenance into three maintenance levels: A-type maintenance, B-type maintenance, and C-type maintenance. The maintenance cycles of various plans are relatively fixed. , equipment of the same type and capacity has the same period under various planned maintenance, without considering the change of the reliability of the equipment itself with the operating years, and most of the research on planned maintenance is carried out under the assumption that the failure rate of equipment is constant. Optimal Arrangement of Overhaul Period

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