Digital HVDC partial discharge testing

Hoogenraad, G.; Beyer, J.B.

doi:10.1109/elinsl.2000.845545

Cited by 17 publications

(12 citation statements)

References 1 publication

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“…Nevertheless, extending the same approach (test method, pattern assessment, and so forth) for analyzing the discharges initiated under high voltage DC is not possible. [19][20][21][22][23] Currently practiced method of measuring/assessing PD signals initiated by high voltage DC neither is sensitive in revealing incipient fault condition and not capable of producing any patterns describing the PD events. [19][20][21][22][23] Pertinent analysis procedures adopted are in-sensitive, time consuming and quite primitive in nature.…”

Section: Introductionmentioning

confidence: 99%

“…[19][20][21][22][23] Currently practiced method of measuring/assessing PD signals initiated by high voltage DC neither is sensitive in revealing incipient fault condition and not capable of producing any patterns describing the PD events. [19][20][21][22][23] Pertinent analysis procedures adopted are in-sensitive, time consuming and quite primitive in nature. Understanding this, the present study attempts to develop a pattern-based approach to measure, quantify and monitor the surface discharges occurring on a tar polluted indoor bushing under DC voltage and characterize the typical behavior.…”

Section: Introductionmentioning

confidence: 99%

“…3,19,[37][38][39][40] The PD signals arising on the surface of the tar polluted porcelain initiated under positive and negative DC voltage carries significant information about the nature of the incipient fault, its location, and its level of intensity. [20][21][22][23] Nevertheless, they are highly stochastic in nature and uncorrelated to the applied DC voltage consequently disabling any possibility for the development of a pattern-based assessment method. 18,20,21,23 The currently practiced methods to assess PD signals initiated under DC voltage are very primitive in nature.…”

Section: Introductionmentioning

confidence: 99%

“…18,20,21,23 The currently practiced methods to assess PD signals initiated under DC voltage are very primitive in nature. 19,22 They employ 'GO or NO-GO' approach which only qualifies the apparatus indicating only PASS or FAIL. In this approach, the number PD pulses for a certain time is counted and based on the number of PD pulses, its intensity, repetition, and so forth, the level of PD is decided while the other valuable information are totally neglected.…”

Section: Introductionmentioning

confidence: 99%

“…In this approach, the number PD pulses for a certain time is counted and based on the number of PD pulses, its intensity, repetition, and so forth, the level of PD is decided while the other valuable information are totally neglected. 22 The other non-conventional methods are also still in process of investigation which requires sensors and PD detections units with high signal-noise-ratio (SNR) value. 3,19,[41][42] Recently, there are several attempts made to develop a pattern-based assessment of PD signals initiated by DC voltage.…”

Section: Introductionmentioning

confidence: 99%

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Quasi‐phase resolved partial discharge pattern analysis of surface discharges arising on the tar polluted porcelain bushing of an electrostatic precipitator unit under high voltage DC

Schröder¹,

Neubauer²,

Schoenemann

et al. 2021

Engineering Reports

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This paper investigates on understanding the DC electrical discharges arising on the surface of feed-through type indoor bushing with tar depositions. Such information not only provides diagnostic status but also characterizes the multitude of species forming tar depositions which is currently unavailable in literatures. The current practice on analyzing surface discharges initiated under DC voltage employs primitive methods that accounts for the individual discharge events over a larger span rendering it less sensitive and time consuming.The usual practice is to count the discharge events initiated under DC voltage as PD pulses and count the events, repetition rates, time of occurrence, and so forth, to estimate the severity of the fault condition. On contrary, synchronizing these discharge pulses to the phase of the AC voltage, input to the rectifier unit, manifests a pattern, which is time independent and is sensitive in revealing diagnostic status of the bushing. These objectives are initially verified on a sample extracted from a tar polluted bushing. A half-wave bridge rectifier that produces an uncontrolled positive and negative DC voltage is selected to initiate surface discharges. Pertinent pulses are then correlated to the phase of the AC voltage input to the rectifier and a quasi-phase resolved partial discharge pattern (QPRPD) is developed. Using this QPRPD pattern, the significance of positive and negative DC voltages applied on the surface of the polluted sample is studied and the inception of discharges events and their correlation to the defect conditions are evaluated. Following this, the pertinent findings are validated on an ‡ Dipl.-Ing. (FH) Philipp Schröder and Dr. Ing. York Neubauer worked at the Institute of Energy Engineering at TU Berlin on the topic presented in this paper within the "EMF project". Both continued their work on high voltage applications in gas cleaning and gas conditioning in the junior research group NWG-TCKON at the same institute.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quasi‐phase resolved partial discharge pattern analysis of surface discharges arising on the tar polluted porcelain bushing of an electrostatic precipitator unit under high voltage DC

Schröder¹,

Neubauer²,

Schoenemann

et al. 2021

Engineering Reports

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Application of UHF-based partial discharge detection and analysis of tar-polluted insulator of a wet ESP unit

Arumugam¹,

Schröder²,

Neubauer³

2018

Meas. Sci. Technol.

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This paper investigates partial discharges occurring on the tar-polluted surface of a porcelain insulator through UHF-based non-conventional partial discharge measurements. First a sample is extracted from an actual tar-polluted porcelain insulator, and the UHF signals arising due to partial discharges on the tar-polluted surface are recorded and analyzed. The patterns manifested by the surface discharges are studied and the respective signals are analyzed in time and frequency domain. Once this is accomplished, pertinent findings are validated on an actual porcelain insulator installed in a wet electrostatic precipitator unit. It is expected that the results from the test sample and on-site validation may help in improving existing maintenance strategies, thereby minimizing procedures hazardous to the environment and human life. At the least, the typical response of tar and its influence on the condition of the porcelain insulator must be determined in the macroscopic scale, which still requires deeper investigation.

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A Preliminary Study of Prediction Method for Oil-paper Insulation Critical Breakdown under DC Voltage Oriented to Power Transformer Protection

Liu

Zhang

Deng

et al. 2019

2019 IEEE 8th International Conference on Advanced Power System Automation and Protection (APAP)

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Digital HVDC partial discharge testing

Cited by 17 publications

References 1 publication

Quasi‐phase resolved partial discharge pattern analysis of surface discharges arising on the tar polluted porcelain bushing of an electrostatic precipitator unit under high voltage DC

Quasi‐phase resolved partial discharge pattern analysis of surface discharges arising on the tar polluted porcelain bushing of an electrostatic precipitator unit under high voltage DC

Application of UHF-based partial discharge detection and analysis of tar-polluted insulator of a wet ESP unit

A Preliminary Study of Prediction Method for Oil-paper Insulation Critical Breakdown under DC Voltage Oriented to Power Transformer Protection

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