کنفرانس بین المللی ماشین و محرکه های الکتریکی

صفحه اصلی / The 5th International Conference on Electrical Machines and Drives

Multiple Partial Discharges Detection and Localization in Air-Insulated Substations: Part 2 – Localization Algorithm, Results Analysis, and Impact of Multi-Path Propagation

نویسندگان :

Morteza Bagheri¹ Asghar Akbari² Hamid Jahangir³

1- Dept. of Electrical and Electronic Engineering K. N. Toosi University of Technology Tehran, Iran 2- Dept. of Electrical and Electronic Engineering K. N. Toosi University of Technology Tehran, Iran 3- Niroo Research Institude High Voltage Group

کلمات کلیدی :

Air-Insulated Substation،Multiple Partial Discharge (PD) Localization،UHF Antenna Array،Time Difference of Arrival (TDOA) Extraction،UHF Antenna Array

چکیده :

The accurate localization of multiple Partial Discharge (PD) sources in Air-Insulated Substations (AIS) using Ultra-High-Frequency (UHF) technology is significantly challenged by environmental noise, signal reflections, and interference. Building upon the foundational methodology established in Part 1—which introduced an optimized biconical antenna, a diamond-Y antenna array, a high-fidelity AIS model with multiple PD sources, and a novel wavelet-based clustering framework—this paper presents the subsequent localization and comprehensive performance analysis. The robust platform developed in Part 1 is now employed to achieve accurate 3D localization. We detail the implementation of a Time Difference of Arrival (TDoA) algorithm to process the denoised and clustered PD signals. The results demonstrate the successful and accurate spatial localization of all five distinct PD sources within the complex substation environment, including challenging scenarios with no direct signal path. A rigorous quantitative analysis is presented, evaluating the system's localization accuracy, precision, and resilience to noise and reflections. This two-part series culminates in a validated, end-to-end methodology for reliable multi-source PD identification and localization, significantly advancing the state of online condition monitoring for air-insulated substations.

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