TY - JOUR
T1 - Detection and Localization of Discharge Sources in Substation Area Using Movable UHF Antenna Array
AU - Zhang, Guanjun
AU - Zhu, Mingxiao
AU - Wang, Yanbo
AU - Liu, Qing
AU - Li, Yuan
AU - Deng, Junbo
AU - Mu, Haibao
N1 - Publisher Copyright:
© 2017 Chin. Soc. for Elec. Eng.
PY - 2017/5/20
Y1 - 2017/5/20
N2 - Partial discharge (PD) detection method based on ultra-high-frequency (UHF) antenna array has been applied to PD monitoring in air-insulated substations (AIS). In previously developed instruments, the estimated range is generally with low localization accuracy. We mainly focus on several problems such as de-noising methods, configuration optimization of antenna array, localization algorithm and development of whole system, etc. For on-site background noise of corona discharge, mobile phone communication signals and other non-impulse noises, several kinds of de-noising methods such as optimization of detection bandwidth, hardware band-stop filter and analysis of energy steepness, were proposed to reduce the influence of different kinds of noises. The configuration of antenna array was optimized by comparing the Cramér-Rao lower bound (CRLB) and mean-square error (MSE) distribution, and the antenna array is chosen as diamond array with size of 4×1m. The probability-based localization (PBL) algorithm via maximum likelihood estimation was adopted to solve the time difference equation group. The PBL reasonably integrates the time differences of continuous signal sequences, which can effectively reduce the influence of time difference of arrival (TDOA) estimation errors and improve the localization accuracy. Finally, a comprehensive system was developed, including four-antenna array, signal conditioning unit and high-speed acquisition unit. The system was applied for PD detection and location in on-site 110kV substations, and the results prove the effectiveness of the system.
AB - Partial discharge (PD) detection method based on ultra-high-frequency (UHF) antenna array has been applied to PD monitoring in air-insulated substations (AIS). In previously developed instruments, the estimated range is generally with low localization accuracy. We mainly focus on several problems such as de-noising methods, configuration optimization of antenna array, localization algorithm and development of whole system, etc. For on-site background noise of corona discharge, mobile phone communication signals and other non-impulse noises, several kinds of de-noising methods such as optimization of detection bandwidth, hardware band-stop filter and analysis of energy steepness, were proposed to reduce the influence of different kinds of noises. The configuration of antenna array was optimized by comparing the Cramér-Rao lower bound (CRLB) and mean-square error (MSE) distribution, and the antenna array is chosen as diamond array with size of 4×1m. The probability-based localization (PBL) algorithm via maximum likelihood estimation was adopted to solve the time difference equation group. The PBL reasonably integrates the time differences of continuous signal sequences, which can effectively reduce the influence of time difference of arrival (TDOA) estimation errors and improve the localization accuracy. Finally, a comprehensive system was developed, including four-antenna array, signal conditioning unit and high-speed acquisition unit. The system was applied for PD detection and location in on-site 110kV substations, and the results prove the effectiveness of the system.
KW - Antenna array
KW - Configuration optimization of antenna array
KW - Detection and localization system
KW - Localization
KW - Monitoring
KW - Partial discharge (PD)
KW - Substation
KW - Time difference of arrival (TDOA) estimation
KW - Ultra-high- frequency (UHF)
UR - https://www.scopus.com/pages/publications/85026255586
U2 - 10.13334/j.0258-8013.pcsee.170267
DO - 10.13334/j.0258-8013.pcsee.170267
M3 - 文章
AN - SCOPUS:85026255586
SN - 0258-8013
VL - 37
SP - 2761
EP - 2773
JO - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
JF - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
IS - 10
ER -