Device and method for testing volt-ampere characteristics of a solid-state decoupler

Abstract

The present invention provides a volt-ampere characteristic test device and method of a solid-state decoupling device. The test device includes a direct-current voltage source, a digital direct-current voltmeter, a digital direct-current milliammeter, a signal processing unit, a test module and a shielding case; the digital direct-current voltmeter monitors voltage at the two ends of the solid-state decoupling device in real time; the digital direct-current milliammeter is connected in series into a loop to monitor current passing through the solid-state decoupling device; the signal processing unit receives test data and sends instructions to the direct-current voltage source through the test module; an upper computer sets a test program and test parameters and receives the data of the signal processing unit and sends instructions to the signal processing unit; the on threshold value of the solid-state decoupling device can be calculated according to the acquired value of the voltage at the two ends of the solid-state decoupling device and the value of the current passing through the solid-state decoupling device, a volt-ampere curve is drawn, and overvoltage protection voltage is determined. The device has the advantages of simple and easy use and convenient wiring, and can provide more accurate and detailed volt-ampere characteristic test data and automatically generate the volt-ampere characteristic curve.

Description

【Technical field】 [0001] The invention belongs to the test field of solid-state decouplers, and in particular relates to a test device and method for volt-ampere characteristics of a solid-state decoupler. 【Background technique】 [0002] A large number of high-grade transmission lines intersect or parallel with electrified railways and oil pipelines. In many areas, oil pipelines and electrified lines share the same public corridor, and AC voltage will be induced on the pipelines through magnetic induction; at the same time, when high-voltage transmission lines are struck by lightning or When it fails, it will also produce resistive interference to the oil pipeline. If the induced AC voltage is too high, it will affect the normal operation of the oil pipeline. Therefore, it is necessary to adopt the drainage method of AC slowdown, among which the solid-state decoupler is the most effective drainage device at present. [0003] A solid-state decoupler is a device that blocks ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low test data accuracy and low test efficiency due to the lack of a complete set of test equipment for the volt-ampere characteristic test in the existing solid-state decoupler test technology, the invention provides a volt-ampere characteristic test device for a solid-state decoupler And methods, can realize the high-accuracy automatic measurement of the conduction threshold, volt-ampere characteristics, overvoltage protection voltage, etc. of the solid-state decoupler

Images