Accurate voltage measurement by the quadrature method

• Published in: IEEE transactions on power delivery Vol. 18; no. 1; pp. 14 - 19
• Main Authors: Chavez, P.P., Jaeger, N.A.F., Rahmatian, F.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.01.2003; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Dielectrics and electrical insulation; Electric fields; Electric potential; Electric variables measurement; Electrical measurements; Electrodes; Mathematical models; Numerical simulation; Optical saturation; Optical sensors; Power transformer insulation; Quadratures; Sensors; Transducers; Voltage; Voltage measurement; Voltage transformers
• ISSN: 0885-8977; 1937-4208
• DOI: 10.1109/TPWRD.2002.801428

This paper introduces the quadrature method for measuring voltage using one or more electric field sensors. To date, all high-voltage sensors, from conventional inductive transformers to modern optical voltage transducers, have one or more of the following traits in common: large size and weight, high-voltage electrodes in close proximity, expensive and potentially hazardous insulation, and capacitive voltage division. Combined with the use of small electro-optic field sensors, the quadrature method enables voltage sensor designs that are free of these traits and that are, therefore, particularly ideal for high-voltage applications. It also allows for a trade-off between the accuracy of the voltage measurement and the number of required electric field sensors. Numerical simulations demonstrate the effectiveness of this technique.