Electronic current transformer transient transformation delay time measuring device and method

Abstract

The invention discloses an electronic current transformer transient transformation delay time measuring device and method. The device comprises a signal conditioning module, an optical signal transceiver, an analog-to-digital conversion module, a high-precision constant-temperature crystal oscillator module, a field programmable gate array, a microprocessor and a display module, wherein the signal input end of the signal conditioning module is used for inputting a standard source signal, the signal output end of the signal conditioning module is connected with the first signal input end of the field programmable gate array through the analog-to-digital conversion module, the second signal input end of the field programmable gate array is connected with the transmitting end of the optical signal transceiver, the receiving end of the optical fiber transceiver is used for being connected with a to-be-measured source signal, the signal transmitting end of the field programmable gate array is connected with the microprocessor, the microprocessor is connected with the display module, and the high-precision constant-temperature crystal oscillator module is respectively connected with the analog-to-digital conversion module, the field programmable gate array and the microprocessor.

Description

technical field [0001] The invention relates to the field of transient characteristic testing of electronic transformers used in smart grids, in particular to a measuring device and method for transient transmission delay time of electronic current transformers. Background technique [0002] At present, electronic current transformers are widely used in smart grids. Interval layer equipment such as relay protection, metering, measurement and control, and fault recording are all based on the sampling values ​​of electronic current transformers to complete their respective automation functions. Electronic current transformers The steady-state characteristics and transient characteristics of the device directly affect the performance of the back-end bay layer equipment. Relay protection equipment is the key equipment for the safe and stable operation of the power system. When a fault occurs, it must be accurately judged and decided whether to act at the fastest speed. At this t...

AI Technical Summary

Problems solved by technology

Method 1 Since the characteristics of electronic current transformers in the transient state and the steady state process are very different, and the application of the current sampling value of the relay protection equipment in the transient state is different from that in the steady state, it is determined The absolute delay time in the steady state cannot replace the delay time in the transient state, and the reference effect is very limited

Method 2 The test of the entire set of delay time cannot reflect the action time of each individual device, and it will not play a big role in qualitative analysis and the improvement of the performance of each independent device

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