Ubiquitous UHF monitoring system for partial discharge detection and trending

Andle, J.C.; Murray, Jonathan; Chap, M.; Baquero, Elkin; Jordan, Jeffrey T.

doi:10.1109/isgt-asia.2015.7387016

Cited by 3 publications

(6 citation statements)

References 4 publications

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“…Both the antenna and the measuring instrument are designed to measure PD on-line mainly in MV switchgears. The instrument used with this method consists of an inexpensive radio frequency (RF) tuner that autonomously discriminates electrical noise and PD pulses, analysing the acquired signals in three frequency bands by using the discrete Fourier transform [ 28 ]. With this method, when PD activity is detected an alarm is automatically triggered, and the type of defect is autonomously identified.…”

Section: Measuring Methods Sensors and Measurement Devicesmentioning

confidence: 99%

“…With this method, when PD activity is detected an alarm is automatically triggered, and the type of defect is autonomously identified. The defect identification is performed by the analysis of the acquired signals in the frequency domain [ 28 ]. When a defect is detected in a switchgear, it can be assured that this defect is inside that switchgear; however, it is not possible to discriminate if the defect is on the switchgear side or in a cable termination connected to it.…”

Section: Measuring Methods Sensors and Measurement Devicesmentioning

confidence: 99%

“…PD instrument used with the measuring method one (IntelliSAW IRM-48). This instrument is designed to measure or monitor PD activity, temperature, and humidity in switchgears and in bus duct chambers [ 28 ]. Measurement of PD pulses is performed in the UHF frequency range with the antenna described in previous section.…”

Section: Measuring Methods Sensors and Measurement Devicesmentioning

confidence: 99%

“…In such a way, plant operators can be notified of the type of defect without the requirement of further analysis of the measurements. The identification is performed by the analysis of the frequency spectrum of the acquired signals [ 28 ]. When internal discharges are detected, the PD activity is represented in the time diagram with large dots, and when surface discharges are detected the activity is shown with small dots.…”

Section: Experimental Measurementsmentioning

confidence: 99%

“…By analysing the distribution of the PD activity shown in Figure 11 , it can be asserted that this method enables the detection of PD activity in the voltage level of 10 kV (inception voltage), although this detection was not very significant. With this method, the objective is to perform a trend analysis of the PD activity, so in some cases this solution tends to classify discharges near inception as noise, since they do not present a reproducible discharge repetition [ 28 ]. This is done with the aim of avoiding false alarms that may confuse power plant operators; thus, no consistent report of internal PD at the inception voltage should be expected.…”

Section: Experimental Measurementsmentioning

confidence: 99%

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Diagnosis of Insulation Condition of MV Switchgears by Application of Different Partial Discharge Measuring Methods and Sensors

Gómez

Albarracín‐Sánchez

Vecino

et al. 2018

Sensors

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Partial discharges (PD) measurement provides valuable information for the condition assessment of the insulation status of high-voltage (HV) electrical installations. During the last three decades, several PD sensors and measuring techniques have been developed to perform accurate diagnostics when PD measurements are carried out on-site and on-line. For utilities, the most attractive characteristics of on-line measurements are that once the sensors are installed in the grid, the electrical service is uninterrupted and that electrical systems are tested in real operating conditions. In medium-voltage (MV) and HV installations, one of the critical points where an insulation defect can occur is inside metal-clad switchgears (including the cable terminals connected to them). Thus, this kind of equipment is increasingly being monitored to carry out proper maintenance based on their condition. This paper presents a study concerning the application of different electromagnetic measuring techniques (compliant with IEC 62478 and IEC 60270 standards), together with the use of suitable sensors, which enable the evaluation of the insulation condition mainly in MV switchgears. The main scope is to give a general overview about appropriate types of electromagnetic measuring methods and sensors to be applied, while considering the level of detail and accuracy in the diagnosis and the particular fail-save requirements of the electrical installations where the switchgears are located.

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Section: Measuring Methods Sensors and Measurement Devicesmentioning

confidence: 99%

Section: Measuring Methods Sensors and Measurement Devicesmentioning

confidence: 99%

Section: Measuring Methods Sensors and Measurement Devicesmentioning

confidence: 99%

Section: Experimental Measurementsmentioning

confidence: 99%

Section: Experimental Measurementsmentioning

confidence: 99%

See 3 more Smart Citations

Diagnosis of Insulation Condition of MV Switchgears by Application of Different Partial Discharge Measuring Methods and Sensors

Gómez

Albarracín‐Sánchez

Vecino

et al. 2018

Sensors

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Current and Future Communication Solutions for Smart Grids: A Review

et al. 2022

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A smart grid provides a bidirectional flow of electricity and information whilst ensuring wellbalanced electricity supply and demand. The key enabler for the smart grid is its robust communication infrastructure. Choosing the best communication technology for the smart grid is crucial as it involves a mixture of critical and non-critical traffic. This study provides a comprehensive review on smart grid communication and its possible solutions for a reliable two-way communication toward supporting diversified power grid applications. Existing networking methods along with their advantages and weaknesses are highlighted for future research directions. The communication network architecture in the smart grid, with details on each networking technology, switching methods and medium for data communication, is critically reviewed to identify the existing research gaps. A discussion on issues and challenges encountered in smart grid communication for current implementation is highlighted together with the recommendations for further improvement. Overall, the highlighted issues and recommendations from this study are useful to researchers, technology providers and industries to develop new communication technologies for the smart grid that will provide reliable, robust, and suitable two-way communication in the future.

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