Device and method for detecting turn-to-turn short circuit fault of generator voltage transformer
A technology of inter-turn short-circuit fault and voltage transformer, which is applied in the field of detection device for inter-turn short-circuit fault of PT winding at generator outlet, can solve the problems of low accuracy and low sensitivity, and achieve high accuracy, high test sensitivity, and portable aspect effect
Pending Publication Date: 2019-03-26
CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD +2
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Problems solved by technology
[0007] In view of the above situation, in order to overcome the deficiencies of the prior art, the object of the present invention is to provide a detection device and method for inter-turn short-circuit faults of generator voltage transformer windings, which can effectively solve the problems of low sensitivity and low accuracy of on-site testing
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[0033] The specific implementation of the present invention will be described in further detail below in conjunction with the examples.
[0034] The present invention is a detection device for inter-turn short-circuit fault of a generator voltage transformer winding, comprising a frequency conversion signal generator, a dual-channel frequency conversion signal measurement device and a computer, wherein:
[0035] Frequency conversion signal generator: used to output a sine wave AC voltage signal whose frequency can be continuously adjusted and changed, as a signal source for the voltage transformer winding at the outlet side of the generator to be tested;
[0036] Dual-channel frequency conversion signal measuring device: used to simultaneously measure the signal voltage at the input and output terminals of the voltage transformer winding signal at the outlet side of the generator to be tested under different frequency signal sources;
[0037] Computer: used to output the chara...
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The invention relates to a device and method for detecting a turn-to-turn short circuit fault of a generator voltage transformer. The device is characterized by comprising a frequency conversion signal generator, a dual-channel frequency conversion signal measuring device and a computer, wherein a signal output end of the frequency conversion signal generator is connected with one of detection ends of the dual-channel frequency conversion signal measuring device, and an output end of the dual-channel frequency conversion signal measuring device is connected with an input end of the computer. The device is advantaged in that the structure is novel and unique, the detection method is simple and reasonable, the device volume is small, the device is portable, wiring from a primary winding of the device during test is quite convenient, the turn-to-turn short circuit fault of a generator output PT winding can be effectively detected in field, on the condition that a short circuit turn ratiois quite low, the short circuit fault can be stilly accurately detected, test sensitivity is high, accuracy is high, the turn-to-turn short circuit fault of the generator output PT winding can be effectively, simply and visually detected, and internal hidden defects in the device can be discovered early.
Description
technical field [0001] The present invention relates to the test of inter-turn short-circuit fault of winding of generator outlet side voltage transformer (referred to as generator outlet PT) in electric power industry, especially the detection device for inter-turn short-circuit fault of generator outlet PT winding by adopting frequency conversion signal generation and measurement analysis technology and methods. Background technique [0002] The voltage transformer on the generator outlet side plays an important role in measuring the generator outlet voltage, measuring the outlet electricity and providing voltage signals for relay protection. Once a failure occurs, it will seriously affect the safe and stable operation of the unit and even cause unplanned shutdown of the unit. In recent years, power generation companies in the electric power industry have repeatedly experienced unplanned outages of generators caused by short-circuit insulation defects between turns of gene...
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Login to View More IPC IPC(8): G01R35/02G01R31/06
CPCG01R35/02G01R31/72
Inventor 韩金华郭晓锋马云飞董琳琳李晏郑豫生张建华刘辉李雅琪张坤锋成志宇殷艳华许济川晏建新胡国成李尚洁
Owner CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD