Broadband voltage transformer suitable for power electronic equipment

Abstract

The invention provides a broadband voltage transformer which is fixed on a shielding case (5) of power electronic equipment. The transformer comprises a patch bottom plate, a measuring electrode (1) and a shielding electrode (2), the shielding electrode (2) is of an annular structure, the measuring electrode (1) is located in the shielding electrode (2), the measuring electrode (1) and the shielding electrode (2) are both fixed to the patch bottom plate, the measuring electrode (1) and the shielding electrode (2) do not make contact with each other, the environmental adaptability is high, andthe broadband voltage measurement can be achieved. The broadband voltage transformer provided by the invention can directly measure the potential distribution and transient voltage of the power electronic equipment, does not change the potential distribution of the power electronic equipment, is non-invasive, does not comprise a heating element, is not sensitive to the environment temperature, andis high in environment adaptability; the broadband voltage transformer provided by the invention is simple in structure, remarkably reduced in longitudinal size, volume and weight, convenient to install and applicable to power electronic equipment.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a broadband voltage transformer suitable for power electronics equipment. Background technique [0002] Power electronic equipment such as converter valves and DC high voltage circuit breakers are composed of power electronic devices, voltage equalizing capacitors, lightning arresters and other components. During the design process, it is necessary to accurately calculate the overvoltage and insulation coordination. The more uniform the voltage drop of each component , the higher the reliability of power electronic equipment. During operation, the difference of electrical components or damage during operation will cause the potential distribution of power electronic equipment to change, which will affect the reliability of power electronic equipment. It is necessary to monitor the transient voltage of power electronic equipment. [0003] Existing voltage transformers g...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor environmental adaptability and difficulty in realizing broadband voltage measurement in the prior art, the present invention provides a broadband voltage transformer suitable for power electronic equipment, which is fixed on the shielding cover (5) of power electronic equipment. It includes a patch base plate, a measuring electrode (1) and a shielding electrode (2); the shielding electrode (2) is a ring structure, the measuring electrode (1) is located inside the shielding electrode (2), and the measuring electrode (1) and the shielding electrode ( 2) They are all fixed on the patch bottom plate, and there is no contact between the measuring electrode (1) and the shielding electrode (2), and the transformer is used to Capacitance realizes the measurement of broadband voltage of power electronic equipment, has strong environmental adaptability, and can realize the measurement of broadband voltage

Images