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

Abstract

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.

Description

technical field [0001] The present invention relates to the technical field of power metering standard equipment, in particular to the error calibration and application technology of high-voltage high-accuracy voltage transformers, and specifically relates to the design and manufacture of a 0.001-level high-voltage high-accuracy dual-stage voltage transformer methods and extensions. Background technique [0002] The application of energy metering is extremely wide. As small as a family, as large as between substations and power plant bureaus, especially for international electricity trade settlements such as the current China-Russia, China-Mongolia, China-Kyrgyzstan (Kyrgyzstan) and mainland China and Hong Kong and Macao regions. is crucial. The obvious reason is the difference in measurement accuracy, and the difference in measurement accuracy is the difference in wealth transfer. The main disadvantage of traditional voltage transformers for metering is that it is extrem...

AI Technical Summary

Problems solved by technology

The main disadvantage of traditional voltage transformers for metering is that it is extremely difficult to achieve high accuracy, and this deficiency will greatly limit the application of voltage transformers for metering purposes and affect the wealth distribution of the country and users

The high-voltage double-stage voltage transformer is based on the low-voltage double-stage voltage transformer, which overcomes the bottleneck of high-voltage insulation and capacitance leakage technology. Its structural characteristics determine that it must be wound by hand. The process is complicated and time-consuming, just like handicraft carving. , so it is determined and limited the high-cost investment of manpower in Western countries to develop, and seek other methods

While the labor force in other developing countries is relatively low, but the relative lack of technology and funds hinders development and research, which has resulted in our strengths

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