26 January 2016 Research of on-line detection system for power capacitor
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Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 990324 (2016) https://doi.org/10.1117/12.2214434
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China
Abstract
The hidden danger exists in the power capacitor of power system due to long-time operation under the environment of high voltage. Thus, it is possible to induce serious fault, and the on-line detection system is urgently required. In this paper, two methods of the on-line detection system are compared in order to realize the better real-time condition detection. The first method is based on the STM microprocessor with an internal 12 bit A/D converter, which converts analog signals which is arrived from the sample circuit into digital signals, and then the FFT algorithm is used to accomplish the measurement of the voltage and current values of the capacitor. The second method is based on the special electric energy metering IC, which can obtain RMS (Root Mean Square) of voltage and current by processing the sampled data of the voltage and current, and store RMS of voltage and current in its certain registers. The operating condition of the capacitor can be obtained after getting the values of voltage and current. By comparing the measuring results of two methods, the second method could achieve a higher measurement accuracy and more simple construction.
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Junda Yao, Zheng Qian, Hao Yu, Jiuyun Xia, "Research of on-line detection system for power capacitor", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 990324 (26 January 2016); doi: 10.1117/12.2214434; https://doi.org/10.1117/12.2214434
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