Static-error-free automatic feedback high-precision fault inversion method

Abstract

The invention discloses a static-error-free automatic feedback high-precision fault inversion method, and the method comprises the steps: setting a preset short-circuit, grounding and anti-misoperation fault scene, applying high-fidelity voltage and current signals to a primary side through the control of software and hardware, verifying the fault research and judgment and processing functions andperformances of an intelligent switch, verifying the fault processing capability of a single device, in the hardware level, enabling the fault inversion test system to transmit the load side impedance to the source side through an impedance transmission mode, the control current adopts a current feedback mode, and through a fast-response static-error-free automatic feedback control circuit, driving a large-current MOS tube to generate nonlinear voltage to drive a load loop to obtain a high-precision primary signal, and then obtaining a high-precision measurement result in a two-path multi-channel high-precision synchronous sampling measurement mode; in the software level, for the steady-state signal, recovering the output signal once in real time, and enabling the voltage and current power source to perform compensation correction according to the load difference of the switch to be tested; for a transient signal, enabling the voltage and current power source to periodically perform amplitude and phase calibration setting according to the current output range in a segmented manner.

Description

technical field [0001] The invention relates to a high-precision fault inversion method without static error automatic feedback, and belongs to the technical field of primary and secondary fusion complete switchgear detection. Background technique [0002] At present, in the detection of primary and secondary fusion complete sets of switchgear, the standard range of current measurement is 0-1000A, and the standard range of voltage measurement is 0-11kV. At the same time, it is necessary to test and analyze transient faults. Primary-side fault injection needs to realize accurate simulation of current, voltage amplitude, phase and transient characteristics in a wide range, so the current and voltage injected by existing detection equipment cannot be continuously adjusted. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-precision fault inversion method without static error automatic feedback, so as to solve t...

AI Technical Summary

Problems solved by technology

Primary-side fault injection requires accurate simulation of current, voltage amplitude, phase, and transient characteristics in a wide range, so the current and voltage injected by existing detection equipment cannot be continuously adjusted.

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