A novel approach to high voltage substation surveillance using radio frequency interference measurement

Nesbitt, A.; Stewart, Brian G.; McMeekin, Scott G.; Conner, S.; Gamio, J.C.; Liebech-Lien, K.; Kristiansen, H. O.; Krakenes, S.

doi:10.1109/eic.2009.5166336

Cited by 11 publications

(3 citation statements)

References 13 publications

(11 reference statements)

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“…Due to the acceleration of charge within impulse currents, PD pulses are a source of broadband radiated electromagnetic energy, which may cause electromagnetic interference (EMI) from the low MHz region up to and beyond 1GHz. A number of PD surveillance methods use radio antennas to detect the presence of these signals and to evaluate the severity of the electrical insulation [4].…”

Section: Introductionmentioning

confidence: 99%

A combined algorithm approach for PD location estimation using RF antennas

Fresno

Robles

Martínez-Tarifa

et al. 2017

2017 IEEE Electrical Insulation Conference (EIC)

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To locate the positions of partial discharge sources in free space at least four RF antennas are arranged in a suitable spatial geometry to detect the radiated electromagnet energy from the discharge. The time-difference-of-arrival (TDOA) between the signals from each antenna are then used within multi-lateration equations to determine the position of the source. The iterative Hyperbolic Least Squares (HLS) method and the non-iterative Maximum Likelihood Estimator (MLE) method are two common techniques used in the literature to solve the multi-lateration equations. This paper investigates the ability of combining MLE and HLS to improve location accuracy and maintain fast location computation time. To this end HLS, MLE and the combined MLEHLS method are evaluated in terms of location accuracy and computation performance for three spatial antenna configurations, namely Square, Pyramidal and Trapezoidal arrangements. The location accuracies for each method are evaluated for theoretical TDOA values and also for the case when a finite sampling rate of 10G samples-per-second is considered, the latter is implemented through appropriate rounding up of TDOA values by one sample time. It is shown that MLE-HLS produces improved location accuracy compared with HLS and MLE for both theoretical and finite sampled TDOA values. In addition, it is shown that MLE-HLS improves significantly the computation time over the iterative HLS method

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Section: Introductionmentioning

confidence: 99%

A combined algorithm approach for PD location estimation using RF antennas

Fresno

Robles

Martínez-Tarifa

et al. 2017

2017 IEEE Electrical Insulation Conference (EIC)

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“…Spectrum analyzers and Electromagnetic Interference Measurements (EMI) scanning receivers are widely available and used in the detection and measurement of RFI signals. However, their use for measuring low repetition rate broadband signals presents particular challenges for reliable and repeatable detection and measurement [1].…”

Section: Introductionmentioning

confidence: 99%

Field experiences using radio frequency scanning (RFS) to detect partial discharge (PD) in bus duct and metal clad switchgear of electrical generating and transmission substations

Acevedo¹

2012

2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials

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It is well known that the occurrence and evolution of partial discharge phenomena within electrical insulation can lead to their destruction. Early detection of this phenomenon can avoid catastrophic failures of electrical equipments installed on transmission, distribution and generating stations. In this paper, two practical experiences using radio frequency scanning to detect partial discharge activity in electrical equipments are described. In the first case, partial discharge activity in two of three phases of a l3.8 kV air isolated bus duct was detected using radio frequency scanning after suspicions of PD activity in a 115 kV GSU power transformer and a 160 MVA generator was detected using acoustic emission and electromagnetic interference measurements tests with radio frequency current transformers. The second case describes the use of radio frequency scanning to detect partial discharge and corona activity inside a 34.5 kV metal clad switchgear located on a 500 kV substation. Although the electrical interference in the area was the main concern to get a reliable measurement, digital filtering and wide band scanning of the radio frequency scanning technique showed high efficacy to discriminate partial discharge activity inside the switchgear. Final results confirmed the abnormal condition of a circuit breaker in the switchgear.

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“…Spectrum analyzers and EMI scanning receivers are widely available and used in the detection and measurement of RFI signals. However, their use for measuring low repetition rate broadband signals presents particular challenges for reliable and repeatable detection and measurement [1]. The first case corresponds to a generation gas central fired with three units and four 115/13.8 kV power transformers where previous Electromagnetic Interference Measurements (EMI) were done by Doble Global Power System team in September 2009.…”

Section: Introductionmentioning

confidence: 99%

Field experiences using Radio Frequency Scanning (RFS) to detect partial discharge in bus duct and metal clad switchgear of electrical generating and transmission substations

Acevedo¹

2011

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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It is well known that Partial Discharge (PD) is the latest stage of almost all failure modes in electrical insulation. Early detection of this phenomenon can avoid catastrophic failures of electrical equipments installed on transmission, distribution and generating stations. In this paper, two practical experiences using Radio Frequency Scanning (RFS) to detect partial discharge in electrical equipments are described. PD occurrence in two of three phases of a 13.8 kV air isolated bus duct was detected using RFS combined with single phase energizing of each phase of the bus at different voltages. In this case, RFS technique was used after suspicions of PD activity in a 115 kV GSU power transformer and a 160 MVA generator was detected using acoustic emission (AE) and EMI tests with Radio Frequency Current Transformers. Finally, the source of PD was detected in the 13.8 kV bus duct connecting generator with power transformer. The second case describes the use of RFS to detect PD and corona activity inside a 34.5 kV metal clad switchgear located on a 500 kV substation and close to an energized overhead line. Although the electrical interference in the area was the main concern to get a reliable measurement, digital filtering and wide band scanning of the RFS technique showed high efficacy to discriminate PD activity inside the switchgear. Additional infrared scanning was done with the purpose of locating the points where corona and PD occurred. Final RFS results confirmed the abnormal condition of a circuit breaker in the switchgear.

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A novel approach to high voltage substation surveillance using radio frequency interference measurement

Cited by 11 publications

References 13 publications

A combined algorithm approach for PD location estimation using RF antennas

A combined algorithm approach for PD location estimation using RF antennas

Field experiences using radio frequency scanning (RFS) to detect partial discharge (PD) in bus duct and metal clad switchgear of electrical generating and transmission substations

Field experiences using Radio Frequency Scanning (RFS) to detect partial discharge in bus duct and metal clad switchgear of electrical generating and transmission substations

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