Untangling Non-Contact Power Monitoring Puzzles

Donnal, John; Lindahl, Peter; Lawrence, David M.; Zachar, Ryan; Leeb, Steven B.

doi:10.1109/jsen.2017.2696485

Cited by 19 publications

(6 citation statements)

References 15 publications

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“…Combining ( 3) and ( 5), we can estimate the value of C X . Furthermore, ĜX is the approximation of G X and can be calculated by (6):…”

Section: Voltage Sensor Self-calibration Methods Based On High-freque...mentioning

confidence: 99%

“…Noncontact voltage measurement technology without electrical contact is adopted to measure the line voltage, which greatly improves the safety of operation and eliminates the need to peel off the insulation layer of the wire, thus greatly reducing the risk of electric shock caused by bare wire. At present, many researchers have studied voltage root mean square (RMS) measurement [5][6][7][8][9][10], and mature products already exist in the market [11]. Methods for measuring the voltage of transmission lines and corresponding contactless voltage sensors have also been proposed [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Noncontact Voltage Measurement System for Low-voltage Power Line

Su,

Li,

Liang

et al. 2024

PIER M

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As one of the most basic electric quantities in a power system, voltage plays an important role in many fields such as condition monitoring and fault diagnosis. The construction and development of the smart grid cannot be separated from the reform and progress of the advanced sensing and measurement technology. Noncontact voltage measurement technology, as one of the important technologies, has many advantages such as no electrical contact, low insulation requirements, easy installation, and great potential in improving the panoramic perception ability of the power system. In this paper, a noncontact measurement method of the power line voltage based on capacitive coupling principle is proposed, which realizes the reliable measurement of the line voltage waveform. First, the principle of the noncontact voltage measurement method is introduced, which mainly includes self-calibration and online measurement of the sensor. The high-frequency voltage signal is injected into the capacitive coupling network of the sensor to implement the self-calibration of the sensor. Then, the digital integration method is used to integrate the output signal of the sensor to measure the line voltage waveform. Second, the noncontact voltage sensor prototype and signal processing circuit are designed. Finally, the test platform of the line voltage measurement is built, and the measurement test of 220 V/50 Hz line voltage waveform is carried out. The test results show the relative amplitude error of the voltage measured by the sensor is less than 2.5%, the maximum phase error less than 2 • at 50 Hz, and the linearity better than 0.5%. The frequency response experiment shows that the system has almost constant gain in the frequency range of 50-1800 Hz, and the phase error reaches a maximum of 2.8 • at a frequency of 1800 Hz.

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“…Combining ( 3) and ( 5), we can estimate the value of C X . Furthermore, ĜX is the approximation of G X and can be calculated by (6):…”

Section: Voltage Sensor Self-calibration Methods Based On High-freque...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Noncontact Voltage Measurement System for Low-voltage Power Line

Su,

Li,

Liang

et al. 2024

PIER M

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“…NILM sensors are installed at the main power entry or at a subpanel. These sensors measure currents and voltages with either conventional voltage and current transducers or with non-contact sensors that do not require ohmic contact [5], [6]. Measurements are sent to This work was supported in part by the Office of Naval Research NEPTUNE program, the Grainger Foundation, the MITei-Exxonmobil collaboration, and the Cooperative Agreement between the Masdar Institute of Science and Technology and MIT.…”

Section: Introductionmentioning

confidence: 99%

“…1). On each ship, the NILM system in place consists of four non-contact meters [5], [6] monitoring the overall power consumption of the vessel and two contact meters (featuring conventional current and voltage transducers) monitoring two electrical subpanels (Fig. 2).…”

Section: Introductionmentioning

confidence: 99%

“…NILM sensors installed at six locations in the electrical network on a USCG Cutter lenges is demonstrated through its incorporation into NILM systems installed aboard US Coast Guard Cutters (USCGC) ESCANABA and SPENCER, two 270-ft (82-m) US Coast Guard ships (Fig.1). On each ship, the NILM system in place consists of four non-contact meters[5],[6] monitoring the overall power consumption of the vessel and two contact meters (featuring conventional current and voltage transducers) monitoring two electrical subpanels (Fig.2). The contact meters on the subpanels provide high resolution measurements of equipment crucial to the proper operation of ship propulsion, power generation, and auxiliary services.…”

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confidence: 99%

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NILM Dashboard: A Power System Monitor for Electromechanical Equipment Diagnostics

Aboulian

Green

Switzer

et al. 2019

IEEE Trans. Ind. Inf.

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Non-intrusive load monitoring (NILM) uses electrical measurements taken at a centralized point in a network to monitor many loads downstream. This paper introduces NILM Dashboard, a machine intelligence and graphical platform that uses NILM data for real-time electromechanical system diagnostics. The operation of individual loads is disaggregated using signal processing and presented as time-based load activity and statistical indicators. The software allows multiple NILM devices to be networked together to provide information about loads residing on different electrical branches at the same time. A graphical user interface provides analysis tools for energy scorekeeping, detecting fault conditions, and determining operating state. The NILM Dashboard is demonstrated on the power system data from two United States Coast Guard (USCG) Cutters.

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