State evaluation method and device for cooling water system of dual water internal cooling synchronous condenser

Abstract

The present invention proposes a state evaluation method and device for the cooling water system of the dual-water internal cooling synchronous condenser, which solves the real-time evaluation problem of the health status of the stator cooling water system and the rotor cooling water system of the dual-water internal cooling synchronous motor, including stator cooling The establishment of the state evaluation index system of the water system and the rotor cooling water system, the de-dimensionalization of the evaluation index, the division of the health state level, the determination of the weight of each evaluation index, and the specific state evaluation steps. The invention adopts the entropy weight method to establish the dynamic weight of each index in real time, determines the similarity between the cloud to be evaluated and each standard cloud based on the similar cloud, and uses the maximum similarity principle to determine the health state of the cooling water system. The invention can reflect the real health state of the stator cooling water system and the rotor cooling water system of the double-water inner cooling synchronous motor, and can realize the online state evaluation of the cooling water system.

Description

technical field [0001] The present invention relates to the fields of index evaluation, operation maintenance and repair of synchronous motors, and more particularly relates to a state evaluation method and device for dual-water inner-cooled synchronous motors. Background technique [0002] In recent years, with the continuous planning and commissioning of UHV DC transmission projects, the converters need to consume a large amount of reactive power during the transmission process. If the grid fails, the reactive power that needs to be absorbed will increase significantly during the rapid dynamic adjustment process; and when the grid voltage is too high, reactive power needs to be released to meet the grid's requirements for voltage stability. It can be seen that insufficient or excess reactive power will cause AC voltage instability, which may endanger the safe and stable operation of the entire AC and DC system in severe cases. Because the synchronous condenser is easy to ...

AI Technical Summary

Problems solved by technology

[0006] The preventive experiments of the synchronous motor cooling water system are usually water cut-off experiments and hollow wire flow experiments. There are still deficiencies in the daily maintenance and operation status analysis of the water system: the preventive experiments generally have a long interval, and it is difficult to guide the daily maintenance; The performance test is not comprehensive enough to evaluate the health status of the entire water system of the synchronous motor, and it is difficult to find hidden troubles in time

Images