Test method of transformer transient characteristics based on Rogowski coil digital simulation

Abstract

The invention discloses a transient characteristic test system of a mutual inductor based on digital simulation of a Rogowski coil. The system comprises a signal conditioning module, an optical fiber sending module, an optical fiber Ethernet module, a digital analog converter, an FPGA (Field Programmable Gate Array), a POWERPC, a crystal oscillator, a human-computer interface and a storage module, wherein the crystal oscillator is connected with the FPGA and the POWERPC, the FPGA is connected with the digital analog converter, the optical fiber sending module, the optical fiber Ethernet module and the POWERPC, the POWERPC is connected with the storage module and the human-computer interface, and the digital analog converter is connected with the signal conditioning module. The FPGA comprises a synchronization module, a data receiving module and a DAC (Digital-to-Analog Converter) control module. The POWERPC comprises a digital simulation model module of the Rogowski coil, a parameter configuration module, a test data processing module and a transient characteristic analyzing module. Based on an ideal Rogowski coil model, a differential signal output is established for all-digital simulation test to be not limited in individual professional laboratories. Advantages of hardware integration and software integration can be compared, and all-around simulation test of transient characteristics of the electronic mutual inductor can be realized.

Description

technical field [0001] The invention belongs to the technical field of simulation testing of transient characteristics of electronic current transformers, aims at testing the transient characteristics of electronic current transformers based on the principle of Rogowski coils, and relates to a digital simulation technology based on the establishment of ideal models of Rogowski coils. transient testing techniques. Background technique [0002] Electronic transformers have been widely used in power systems. At present, electrical and electronic transformers based on the Rogowski coil principle are still the mainstream products in the market. However, because the output of the electronic transformer based on the Rogowski coil principle is a differentiated signal, it must be restored through the integral link. The final impact of the change in transient characteristics brought about by this link from the differential to the integral is still insufficient. test data. At present...

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Problems solved by technology

When the system transient process occurs, the amplitude of the current will increase significantly, and the fundamental component often contains a large number of attenuated DC components and harmonic components. In this case, how to quantitatively test the electronic transformer is currently the The biggest challenge facing the electronic transformer laboratory

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