Development of Distributed On-line Monitoring System for Dielectric Loss Tangent of High Voltage Capacitive Apparatus

• Autorzy: Gao Q. , Sheng G. , Zhong D. , Wang M. , Liu Y. , Jiang X.

Warianty tytułu

PL

Budowa systemu rozproszonego monitorowania on-line współczynnika strat dielektrycznych w wysokonapięciowych aparatach pojemnościowych

• Języki publikacji: EN

Abstrakty

EN

This paper presents a distributed measuring system for on-line monitoring of dielectric loss factor tan δ, and capacitance of HV apparatus. The method employs the Discrete Fourier Transform (DFT) which is performed on the scaled down analog voltage and current signals obtained using digital signal processing (DSP) technology. The measuring unit of the on-line monitoring system takes a series of measures in the hardware circuit design to improve the effectiveness of the DFT algorithm. The lab test results of measuring unit show that the measuring unit has high precision of measurement based on the DFT method. Field tests at a regional substation to evaluate the insulation of two groups of 220kV current transformer units using the developed system.

PL

W artykule opisano system pomiaru rozproszonego do monitorowania on-line współczynnika strat dielektrycznych i pojemności w aparatach HV. W metodzie wykorzystano Dyskretną Transformatę Fouriera. W celu poprawy dokładności i skuteczności DFT, dokonywana jest seria pomiarów. Wyniki badań laboratoryjnych oraz w rzeczywistej podstacji, wykazały wysoką precyzję rozwiązania.

Słowa kluczowe

EN

dielectric loss factor; discrete Fourier transform; distributed measuring system; DSP; on-line monitoring

PL

współczynnik strat dielektrycznych; dyskretna transformata Fouriera; system pomiaru rozproszonego; DSP; monitorowanie on-line

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2013
• Tom: R. 89, nr 3a
• Strony: 145--148
• Opis fizyczny: Bibliogr. 6 poz., il., schem., tab., wykr.

Twórcy

autor

Gao Q.

• Shanghai Jiao Tong University
• Northeast Electric power Research Institute

autor

Sheng G.

• Shanghai Jiao Tong University

autor

Zhong D.

• Northeast Electric power Research Institute

autor

Wang M.

• Northeast Electric power Research Institute

autor

Liu Y.

• Shanghai Jiao Tong University

autor

Jiang X.

• Shanghai Jiao Tong University

Bibliografia

• [1] Pei Wang, M.R. Raghuveer, W. McDermid, J.C. Bromley, “A Digital Technique for the On-line Measurement of Dissipation Factor and Capacitance” IEEE Transactions on Dielectrics and Electrical Insulation, pp.228-232, Vol.8 No.2, April 2001.
• [2] Huiping Zhang, Kexiong Tan, Fengyu Dong, Jinchang Wang, “The Analysis of On-line Monitored Results for Capacitive Type of Equipment”, ISEIM 2001, pp805-808.
• [3] Yang Minzhong, Liu Shaoyu, Wang Zhuo and Yan Zhang, “Error Analysis for Dielectric Loss Measurement Based on Harmonic Anlysis”, ISEIM 2001, pp336-339
• [4] ]Song Huixin, Gao Liang, Wang Yanjun, Wu Baozhong, “Development of Digital Measuring Instrument for Dielectric Loss Tangent” , ICEMI’2007, PP1-102-1-106
• [5] Wang Guan, Li Qing-min, “Development of a digital algorithm based on instantaneous power transform for on-line monitoring of the dielectric loss factor”, 2006 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, pp35-38,
• [6] Q.Li, T.Zhao and W.H. Siew, “Definition and digital algorithms of dielectric loss factor for condition monitoring of high-voltage power equipment with harmonics emphasis” IEE Proc.-Gener. Transm. Distrib., Vol.152, No.3, May 2005, pp309-312