Digital-type hysteresis control current source

Abstract

The invention provides a digital-type hysteresis control current source, which comprises a rectification transformer unit, a stable current unit and a load unit; the rectification transformer unit comprises a transformer and an H-type full-bridge uncontrollable rectifier; a municipal power alternative-current voltage is converted by the rectification transformer unit into a direct-current voltage after being boosted and rectified, and the direct-current voltage is inputted to the load unit after being inputted to the stable current unit by an inversion unit; and a signal collection unit transforms a collected current signal of the load unit into a voltage signal, and then the voltage signal is inputted to a micro processing unit (MCU) after being amplified and inputted to an analog-digital (AD) conversion unit to process. By adopting the digitalized control, the temperature drift is small, the interference resistance is strong, the stability is good, and the reliability is high; a digital-type part has a firm structure, small size and light weight and is easy to standardize, and the control strategy is flexible; and the performance is excellent, the digital-type hysteresis control current source is more stable to run and is easy to upgrade and maintain.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a digital hysteresis control current source. Background technique [0002] At present, series compensation technology has been widely used abroad. In recent years, my country's power grid has developed rapidly, and several sets of series compensation equipment have been developed successively. The gap trigger control circuit is a control circuit with electronic measurement that enables reliable and controllable ignition discharge of the gap in the series compensation device. The power supply of the gap trigger energy storage control circuit and the energy storage to the capacitor are provided by the current transformer, referred to as energy harvesting CT. However, the secondary output of the on-line energy harvesting CT must be used in the process of gap trigger energy storage control, production, improvement, field test, circuit board test machine, etc. of t...

AI Technical Summary

Problems solved by technology

[0005] The current source based on the hysteresis control principle is realized by an analog circuit. However, the analog circuit uses a large number of scattered components and circuit boards, the hardware cost is high, and the reliability of the system is reduced. Due to the existence of manual debugging devices such as adjustable potentiometers, the production efficiency The consistency of the reduction and control system is poor, there are aging and temperature drift of the device, and it is difficult to upgrade the product, etc.

If you need to upgrade the product, you must redesign the hardware and control system

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