Pardo-Vicente, M.A.; Guerrero, J.M.; Platero, C.A.; Sánchez-Férnandez, J.A. Contactless Rotor Ground Fault Detection Method for Brushless Synchronous Machines Based on an AC/DC Rotating Current Sensor. Sensors2023, 23, 9065.
Pardo-Vicente, M.A.; Guerrero, J.M.; Platero, C.A.; Sánchez-Férnandez, J.A. Contactless Rotor Ground Fault Detection Method for Brushless Synchronous Machines Based on an AC/DC Rotating Current Sensor. Sensors 2023, 23, 9065.
Pardo-Vicente, M.A.; Guerrero, J.M.; Platero, C.A.; Sánchez-Férnandez, J.A. Contactless Rotor Ground Fault Detection Method for Brushless Synchronous Machines Based on an AC/DC Rotating Current Sensor. Sensors2023, 23, 9065.
Pardo-Vicente, M.A.; Guerrero, J.M.; Platero, C.A.; Sánchez-Férnandez, J.A. Contactless Rotor Ground Fault Detection Method for Brushless Synchronous Machines Based on an AC/DC Rotating Current Sensor. Sensors 2023, 23, 9065.
Abstract
Brushless Synchronous Machines (BSM) 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 challenging measuring electric parameters in the rotor. This fact highly difficult the detection of ground faults, which are the most common type of electrical fault in electric machines. In this paper, a ground fault detection method for BSM is proposed. It is based on an inductive AC/DC rotating current sensor installed in the shaft. In 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. 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 discern between DC and AC sides. To corroborate the detection method, experimental tests have been performed using a prototype of this sensor connected to laboratory synchronous machines achieving satisfactory results.
Keywords
Alternate Current; Direct Current; Rotor Fault Detection; Current Sensor
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
