Identification and Compensation for D-Dot Measurement System in Transient Electromagnetic Pulse Measurement

Jin, Mengzhe; Li, Hao; Liu, Shanghe

doi:10.3390/s22218538

Cited by 3 publications

(4 citation statements)

References 30 publications

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“…Figure 11 shows the conceptual structure and equivalent circuit of a typical LPVT with a capacitive voltage divider (CVD) principle based on the C-divider. The LPVT's output can be expressed as the following Equation ( 15) [82].…”

Section: Accuracy Of Evts and Ectsmentioning

confidence: 99%

“…Figure 13 shows a block diagram of a typical LPIT. Unlike the EIT describe earlier, derivative output signals are not within the scope of an LPIT according to IE The LPVT's output can be expressed as the following Equation ( 15) [82].…”

Section: Accuracy Of Evts and Ectsmentioning

confidence: 99%

“…Figure 12 shows the structure and equivalent circuit of an LPCT. The LPVT's output can be expressed as the following Equation ( 15) [82].…”

Section: Accuracy Of Evts and Ectsmentioning

confidence: 99%

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Trends in Measuring Instrument Transformers for Gas-Insulated Switchgears: A Review

Kim,

Lee,

Kil

et al. 2024

Energies

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Voltage and current measurements in high-voltage substations are fundamental for stable operation. Conventional instrument transformers (ITs) face challenges in gas-insulated switchgears (GISs), such as size, weight, accuracy limitations, and behavioral instability at abnormal voltages and currents. Non-conventional instrument transformers (NCITs) have emerged to address these issues, complying with International Electrotechnical Commission (IEC) standards and providing millivolt-level signals, enabling downsizing of GIS bays. The transition to digital substations, as mandated by IEC 61850-9-2, requires a shift from the conventional 110 V/5 A outputs to levels ranging from millivolts to volts. Electronic instrument transformers (EITs), compliant with the IEC 60044-7 and 8 standards, offer alternatives to conventional ITs with smaller sizes and wider frequency ranges. However, issues remain with EITs, including limited adoption, the necessity of separate power sources, and susceptibility to electromagnetic interference. Recent standards, transitioning to IEC 61869, focus on low-power instrument transformers (LPITs). Low-power voltage transformers (LPVTs) and low-power current transformers (LPCTs), designed with passive components, present potential solutions by directly connecting to merging units (MUs) for digital signal transmission. This review outlines the current status of various IT standards, covering conventional ITs, EITs based on IEC 60044-7 and 8, and LPITs based on IEC 61869-10 and 11. Advancements in sensor technology relevant to these standards are also explored. The paper provides insights into the evolving landscape of instrument transformers, addressing challenges and offering potential pathways for future developments in digital substations.

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Section: Accuracy Of Evts and Ectsmentioning

confidence: 99%

Section: Accuracy Of Evts and Ectsmentioning

confidence: 99%

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Trends in Measuring Instrument Transformers for Gas-Insulated Switchgears: A Review

Kim,

Lee,

Kil

et al. 2024

Energies

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“…They found that the apparent discharge measured by the EM field sensors was almost identical to the reference PD pulse measured with an oscilloscope. Jin and colleagues [ 32 ] studied the measurement of a transient-pulsed electromagnetic field using a D-dot sensor and outlined a compensation system for the recovery of the incident E-field to improve the dynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

The Design, Fabrication, and Evaluation of a Phase-Resolved Partial Discharge Sensor Embedded in a MV-Class Bushing

Lee,

Kim,

Kim

et al. 2023

Sensors

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This paper proposes a novel phase-resolved partial discharge (PRPD) sensor embedded in a MV-class bushing for high-accuracy insulation analysis. The design, fabrication, and evaluation of a PRPD sensor embedded in a MV-class bushing aimed to achieve the detection of partial discharge (PD) pulses that are phase-synchronized with the applied primary HV signal. A prototype PRPD sensor was composed of a flexible printed circuit board (PCB) with dual-sensing electrodes, utilizing a capacitive voltage divider (CVD) for voltage measurement, the D-dot principle for PD detection, and a signal transducer with passive elements. A PD simulator was prepared to emulate typical PD defects, i.e., a metal protrusion. The voltage measurement precision of the prototype PRPD sensor was satisfied with the accuracy class of 0.2 specified in IEC 61869-11, as the maximum corrected voltage error ratios and corrected phase errors in 80%, 100%, and 120% of the rated voltage (13.2 kilovolts (kV)) were less than 0.2% and 10 min, respectively. In addition, the prototype PRPD sensor had good linearity and high sensitivity for PD detection compared with a conventional electrical detection method. According to performance evaluation tests, the prototype PRPD sensor embedded in the MV-class bushing can measure PRPD patterns phase-synchronized with the primary voltage without any additional synchronization equipment or system. Therefore, the prototype PRPD sensor holds potential as a substitute for conventional commercial PD sensors. Consequently, this advancement could lead to the enhancement of power system monitoring and maintenance, contributing to the digitalization and minimization of power apparatus.

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Design, Fabrication, and Evaluation of a Phase-Resolved Partial Discharge Sensor embedded in MV-Class Bushing

Lee,

Kim,

Kim

et al. 2023

Preprint

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This paper proposes a novel phase-resolved partial discharge (PRPD) sensor embedded in MV-class bushing for high-accuracy insulation analysis. The design, fabrication, and evaluation of a PRPD sensor embedded in MV-class bushing aimed to detect partial discharge (PD) pulses that are phase-synchronized with the applied primary HV signals. A prototype PRPD sensor was composed of a flexible printed circuit board (PCB) with dual-sensing electrodes, utilizing a capacitive voltage divider (CVD) principle for voltage measurement and D-dot principle for PD detection, and a signal transducer with passive elements. A PD simulator was prepared to emulate typical PD defects, i.e., a metal protrusion. The voltage measurement precision of the prototype PRPD sensor was satisfied with the accuracy class of 0.2 specified in IEC 61869-11, as the maximum corrected voltage error ratios and corrected phase errors in 80%, 100%, and 120% of the rated voltage (13.2 kV) were less than 0.2% and 10 minutes, respectively. In addition, the prototype PRPD sensor had good linearity and high sensitivity for PD detection compared with a conventional electrical detection method. According to performance evaluation tests, the prototype PRPD sensor embedded in the MV-class bushing can measure PRPD patterns phase-synchronized with the primary voltage without any additional synchronization equipment or system. Therefore, the prototype PRPD sensor holds potential as a substitute for conventional commercial PD sensors. Consequently, this advancement could lead to the enhancement of power system monitoring and maintenance, contributing to the digitalization and minimization of power apparatus.

show abstract

Identification and Compensation for D-Dot Measurement System in Transient Electromagnetic Pulse Measurement

Cited by 3 publications

References 30 publications

Trends in Measuring Instrument Transformers for Gas-Insulated Switchgears: A Review

Trends in Measuring Instrument Transformers for Gas-Insulated Switchgears: A Review

The Design, Fabrication, and Evaluation of a Phase-Resolved Partial Discharge Sensor Embedded in a MV-Class Bushing

Design, Fabrication, and Evaluation of a Phase-Resolved Partial Discharge Sensor embedded in MV-Class Bushing

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