High-precision waveform inversion system

Abstract

The invention relates to a high-precision waveform inversion system. The system comprises a primary voltage and current power source, a primary signal driver and a wave recorder, wherein the signal output end of the primary voltage and current power source is connected with the signal input end of the primary signal driver, the output end of the primary signal driver is connected with the signal input end of the wave recorder, and the signal feedback end of the wave recorder is connected with the primary voltage and current power source. The system has the advantages that the fault waveform inversion system hardware design is carried out aiming at the problems of single means and low automation level of the current single-phase earth fault function test, the high precision of the inversion waveform is ensured, and the function test of single-phase earth fault processing can be conveniently carried out aiming at the primary and secondary fusion intelligent switch.

Description

technical field [0001] The invention relates to a high-precision waveform inversion system, which is especially suitable for fault waveform inversion on a primary side, and belongs to the technical field of power distribution equipment. Background technique [0002] Feeder Automation (FA for short) is an important part of distribution automation. It means that when a distribution network fault occurs, the system performs fault diagnosis, fault location, automatic isolation and recovery based on the data monitored by the distribution automation terminal. Improve regional power supply, so as to achieve the purpose of shortening the fault outage time and narrowing the fault power outage scope; however, the correct action rate of power distribution terminals has not been optimistic for a long time. The main reasons for incorrect actions are: hardware defects, protection principles, and action strategies. unreasonable configuration, harsh operating environment (serious interferen...

AI Technical Summary

Problems solved by technology

[0003] 1. At present, most of the waveform inversion test systems on the market are based on the inversion of the fault waveform of the secondary side of the power source, which is not difficult and very mature; but the inversion of the fault waveform on the primary side requires high voltage (>10kV), large Current (720A), high precision (0.1%), the traditional current booster cannot accurately control the current magnitude and phase, and the technology is very difficult, so there are few applications;

[0004] 2. The waveform inversion test system currently on the market has a low level of automation, mainly manual testing, and cannot truly achieve closed-loop testing, and the single-phase ground fault function test still uses RTDS simulation waveforms, which cannot be used once on site. Fault waveform, so it has little effect on improving the correct rate of primary and secondary fusion intelligent switch fault actions

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