On-Line Rotor Ground Fault Location Method for Brushless Synchronous Machines

Pardo, M.A.; Mahtani, Kumar; Platero, Carlos A.; Sánchez-Fernández, José Ángel

doi:10.1109/tia.2023.3248020

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…Another technique, proposed by this research team, is using the exciter as an injection source. However, this technique requires, also, the installation of a slipring and brush [15]. Therefore, the sparking problem remains.…”

Section: Introductionmentioning

confidence: 99%

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Contactless Rotor Ground Fault Detection Method for Brushless Synchronous Machines Based on an AC/DC Rotating Current Sensor

Pardo-Vicente,

Guerrero,

Platero

et al. 2023

Sensors

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Brushless synchronous machines (BSMs) are replacing conventional synchronous machines with static excitation in generation facilities due to the absence of sparking and lower maintenance. However, this excitation system makes measuring electric parameters in the rotor challenging. It is highly difficult to detect ground faults, which are the most common type of electrical fault in electric machines. In this paper, a ground fault detection method for BSMs is proposed. It is based on an inductive AC/DC rotating current sensor installed in the shaft. In the case of a ground fault in the rotating parts of the BSM, a fault current will flow through the rotor’s sensor, inducing voltage in its stator. By analyzing the frequency components of the induced voltage, the detection of a ground fault in the rotating elements is possible. The ground faults detection method proposed covers the whole rotor and discerns between DC and AC sides. This method does not need any additional power source, slip ring, or brush, which is an important advantage in comparison with the existing methods. To corroborate the detection method, experimental tests have been performed using a prototype of this sensor connected to laboratory synchronous machines, achieving satisfactory results.

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Section: Introductionmentioning

confidence: 99%

“…Afterwards, this previous method was adapted and used for brushless excitation systems [15]. In this case, the armature winding of the exciter should be in star connection with neutral.…”

Section: Introductionmentioning

confidence: 99%

Contactless Rotor Ground Fault Detection Method for Brushless Synchronous Machines Based on an AC/DC Rotating Current Sensor

Pardo-Vicente,

Guerrero,

Platero

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

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“…Ground faults continue to be a prevalent subject across all electrical and electronic systems (Guerrero, Mahtani, Serrano-Jimenez, & Platero, 2021) (Pardo, Mahtani, Platero, & Sanchez-Fernandez, 2023) (Kumar, Vaijayanthi, Deshmukh, Vedik, & Shiva, 2022) (Bani Milhim, et al, 2022). Various approaches for ground fault health monitoring have been proposed by other researchers.…”

Section: Introductionmentioning

confidence: 99%

Automotive Electronic Control Unit Ground Line Health Monitoring Method

Milhim,

Ramadhan,

et al. 2023

PHM_CONF

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Electronic Control Units (ECUs) have been used in the automotive industry for decades to control one or more of the vehicle subsystems. The ECUs communicate primarily using the in-vehicle Controller Area Network (CAN) communication protocol. The recent rapid development of connected, electric, and autonomous vehicles expands the number of ECUs and complexity of the CAN network required to integrate vehicle systems and deliver the desired functionalities. This demands increased reliability of the ECUs to ensure for robust vehicle performance. One of the most common ECU failure modes is the ECU ground fault. A ground fault occurs when the ground path in the ECU circuit is corroded, which is usually developed slowly over time. Such failure usually results in various symptoms including ECU incapable of functioning and further impacts the vehicle functionalities negatively. This type of fault can be difficult to detect prior to vehicle functionality loss. It usually involves routinely testing the resistance of the ground circuit, visually inspecting the connectors and wirings, and checking the voltage drop across the ground circuit. Therefore, it is highly desirable to continuously monitor the ECU ground line health status to predict any degradation and thus prevent vehicle functionality losses. This paper presents a novel method to monitor the health status of ECU ground line. The method leverages measured CAN voltage data to estimate the ECU ground state of health. The CAN voltage measurements are preprocessed and fed into a real-time data buffer of predefined size. Statistical moments are calculated from the buffered data to generate health indicators, which are then combined to form a fused health indicator. The fused health indicator is used to determine the health stage of ECU ground line. The health stage is classified based on the relationship between ground line degradation level and the ECU communication loss status. The method was developed and validated using actual vehicle data.

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