Device and method for testing temperature rising characteristics of nonlinear resistors of generator de-excitation systems

Abstract

The invention belongs to the technical field of industrial automation, and particularly relates to a device and a method for testing temperature rising characteristics of nonlinear resistors of generator de-excitation systems. An infrared thermal imaging lens A, an infrared thermal imaging lens B and an infrared thermal imaging lens C are connected with a controller through communication cables; the controller is connected with input signals and output signals of other external controllers through communication cables in a RS232, switching value and analog quantity mode; the controller is connected with a printer through a cable; and a nonlinear resistor element is connected with a fixed support frame through insulated screws. The device and the method have the advantages of being safe and reliable, the occurrence rate of accidents of short circuit, perforation, breakage and the like of resistance valve plates can be reduced, and nonlinear resistors are guaranteed to operate stably and reliably.

Description

technical field [0001] The invention belongs to the technical field of industrial automation, and in particular relates to the technical field of a non-linear resistance temperature rise characteristic testing device and method of a generator demagnetization system. Background technique [0002] In recent years, the application of non-linear resistors in generator de-excitation system has become more and more common due to its excellent volt-ampere characteristics. Accidents such as short circuit, perforation, and fracture of the resistance valve plate. A comprehensive comparison of various accidents found that there are mainly two forms of failure damage to nonlinear resistance elements: one is that the current flowing through the resistance element exceeds the rated current value, and the other is that the demagnetization energy absorbed by the resistance element exceeds the specified demagnetization value. The value of the magnetic capacity, and these two forms of damage...

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Problems solved by technology

At present, there is no unified test standard and test method in China to conduct a complete appraisal of the characteristics and operation of the nonlinear resistor. The existing technology lacks the means to track and judge the temperature rise characteristic of the resistor element alone.

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