Development and application of 0.001-grade high-voltage and high-accuracy double pole voltage transformer

• Main Authors: SHAO HAIMING, QIN XICHANG, PENG SHIXIONG, LIN FEIPENG, XIA XINGNENG, FU XIANDONG, WANG XIAOLING
• Format: Patent
• Language: English
• Published: 08.04.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TESTING; TRANSFORMERS

The invention discloses development and application of a 0.001-grade high-voltage and high-accuracy double pole voltage transformer and relates to the technical field of power measurement standard equipment. The main innovation points of the development and the application are that innovative design and extensive application of a double pole voltage transformer structure are realized in the high-voltage field; a high-potential and low-voltage excitation component is adopted; and the design of a double pole structure of an annular core and an innovative method arranging a secondary winding outside a primary winding enable the reduction of primary winding resistance R1 and primary leakage reactance X1 of the high voltage winding. In practical engineering application, the voltage transformer is high in accuracy and good in stability; the calibration measurement transfer accuracy and working efficiency of the transformer are improved. An all-insulation 110kV/square root of 3 double pole voltage transformer and a semi-insulation 110kV/square root of 3 double pole voltage transformer are connected in series to form the 220kV/square root of 3 0.001-grade double pole voltage transformer, so that a high-accuracy voltage measurement range is doubled; and the voltage transformer belongs to a domestic and international leading project.