TY - GEN
T1 - Accurate voltage-to-frequency sensor with galvanic isolation and bandwidth of 375kHz
AU - Yan, Decheng
AU - Zheng, Liran
AU - Kandula, Rajendra Prasad
AU - Divan, Deepak
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/10/10
Y1 - 2020/10/10
N2 - High-bandwidth low-cost MV voltage sensors with appropriate isolation are required in MV power electronic converters for utility and industrial applications. It is especially critical in low-inertia converters (reduced passives) due to the existence of fast dynamics with reduced storage elements (dc-link, filters etc.). In this paper, a MV sensor for sensing a 2kV 16kHz voltage is presented. The sensor is supposed to provide > 160kHz bandwidth which is 10 times the frequency to be sensed, 2% accuracy and >10kV isolation. It is based on voltage-to-frequency (V2F) conversion and optical isolation principles. Compared to existing solutions, the proposed sensor is fast and scalable to MV thanks to the feature of converting analog voltage into digital high-speed square wave through optical enabled MV isolation. The components chosen to build the sensor and the design trade-offs are explained in detail. The sensor delay, accuracy, bandwidth characteristics are shown both at the v2f-sensor output and after frequency to voltage conversion implemented in a FPGA.
AB - High-bandwidth low-cost MV voltage sensors with appropriate isolation are required in MV power electronic converters for utility and industrial applications. It is especially critical in low-inertia converters (reduced passives) due to the existence of fast dynamics with reduced storage elements (dc-link, filters etc.). In this paper, a MV sensor for sensing a 2kV 16kHz voltage is presented. The sensor is supposed to provide > 160kHz bandwidth which is 10 times the frequency to be sensed, 2% accuracy and >10kV isolation. It is based on voltage-to-frequency (V2F) conversion and optical isolation principles. Compared to existing solutions, the proposed sensor is fast and scalable to MV thanks to the feature of converting analog voltage into digital high-speed square wave through optical enabled MV isolation. The components chosen to build the sensor and the design trade-offs are explained in detail. The sensor delay, accuracy, bandwidth characteristics are shown both at the v2f-sensor output and after frequency to voltage conversion implemented in a FPGA.
KW - High isolation
KW - Medium voltage sensor
KW - SST
KW - Voltage-to-frequency
UR - http://www.scopus.com/inward/record.url?scp=85101013487&partnerID=8YFLogxK
U2 - 10.1109/IAS44978.2020.9334809
DO - 10.1109/IAS44978.2020.9334809
M3 - Conference contribution
AN - SCOPUS:85101013487
T3 - 2020 IEEE Industry Applications Society Annual Meeting, IAS 2020
BT - 2020 IEEE Industry Applications Society Annual Meeting, IAS 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 IEEE Industry Applications Society Annual Meeting, IAS 2020
Y2 - 10 October 2020 through 16 October 2020
ER -