High-potential current real-time detection device

Abstract

A high-potential current real-time detection device comprises a high-potential power gaining circuit, a power module, a current sensor, a signal conditioning circuit, a coding and decoding digital circuit and a photoelectric signal converter. The high-potential energy gaining circuit acquires power from high potential near detecting points directly and transmits to the power module after the power in converted into low-voltage alternating current. The power module rectifies the alternating current, filters, and outputs direct current to the current sensor. The current sensor transmits signals to the signal conditioning circuit, and the signal conditioning circuit outputs shaped current signals. The coding and decoding digital circuit converts analog signals into digital signals and codes the signals, and the coded signals are transmitted to a remote control system through the photoelectric signal converter. The device has the advantages of simple and compact structure and low cost, detected current information is high in interference resistance, instantaneity and accuracy, high voltage and low voltage are isolated actually, and using security of a high voltage device is improved.

Description

technical field [0001] The invention mainly relates to the state detection field of a converter in a high-voltage system, in particular to a real-time detection device for a high-potential current. Background technique [0002] At present, the current detection device applied to the converter in the high-voltage system mainly adopts the following two methods: [0003] One is to use the current transformer to measure, and then directly transmit the analog signal to the converter control system through the secondary cable. The disadvantage of this method is that the analog signal is easily disturbed by the external electromagnetic environment when transmitted through a long secondary cable, which reduces the electromagnetic compatibility of the entire control system; at the same time, it is difficult to design the secondary cable inside the converter due to the consideration of insulation , Only by current mutual isolation, effective high and low voltage isolation cannot be a...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: aiming at the technical problems existing in the prior art, the present invention provides a simple and compact structure, low cost, which can make the detected current information strong anti-interference, good real-time and high precision, and at the same time It is a high-potential current real-time detection device that ensures the real isolation of high and low voltage and improves the safety of high-voltage equipment, and effectively solves the problem of insufficient insulation of current sensors in high-voltage systems

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