Large-scale hydro-generator stator winding partial discharge analysis system

A technology for partial discharge analysis and hydraulic generators, which is applied in the direction of motor generator testing, measuring electricity, and testing circuits. It can solve problems such as stoppage, fluctuation of partial discharge test values, and inability to ensure the accuracy of test results, so as to reduce configuration. Cost, good stability, and the effect of reducing the amount of data calculation
CN113109680AActive Publication Date: 2021-07-13GUODIAN SCI & TECH RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUODIAN SCI & TECH RES INST
Publication Date
2021-07-13

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Abstract

The invention relates to a large-scale hydro-generator stator winding partial discharge analysis system, which comprises a time-delay-free conversion system, a synchronous signal clock system, a partial discharge signal high-speed acquisition system and a partial discharge data analysis system. The time-delay-free conversion system accesses a voltage signal from a generator outlet high-voltage test loop; then the voltage signal is linearly reduced and then is respectively input into a synchronous signal clock system and a partial discharge signal high-speed acquisition system, and the synchronous signal clock system is used for generating a synchronous clock signal synchronous with the voltage signal; the partial discharge signal high-speed acquisition system is used for performing high-pass filtering, analog-to-digital conversion and storage on the reduced voltage signal; and finally, the partial discharge data analysis system is used for processing the partial discharge data. According to the partial discharge analysis system, the data calculation amount and the configuration cost can be greatly reduced.
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Description

technical field

[0001] The invention relates to a partial discharge analysis system for stator windings of large hydraulic generators, belonging to the field of insulation state evaluation of stator windings of large hydraulic generators. Background technique

[0002] my country has built large-scale hydropower stations with an installed capacity of 10 million kilowatts such as the Three Gorges Project, Xiluodu, and Wudongde. The stator winding insulation system of a large hydroelectric generator is relatively complex, including the main insulation, the semiconductor layer in the slot, the anti-corona layer at the end, etc.; at the same time, it has the characteristics of high operating voltage, the highest has reached 24kV. In recent years, due to factors such as dispersion of process quality in the process of localization of stator winding insulation materials, many large-scale hydro-generator stator winding insulation faults have occurred.

[0003] Stator winding insulat...

Claims

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