Microprocessor-based protection measurement and control device

Abstract

The invention discloses a microprocessor-based protection measurement and control device, which comprises a display screen, an operation panel, an indicator lamp, a wiring terminal and a measurement and control circuit. The measurement and control circuit includes a controller, an AC sampler, a switching-in circuit, a protection circuit, a communication circuit and a power supply. The protection circuit includes a quick-breaking over-current protection circuit, a reclosing protection circuit, an over-voltage protection circuit and a low-cycle load shedding protection circuit. The measurement and control device of the invention uses keys to select tasks, and realizes six functions including sampling, parameters, value setting, events, clocks and switching-out. The protection mechanism is comprehensive and accurate, can protect various circuit conditions accordingly, and ensures the safety of the circuit. The device has strong operation processing ability and high sampling frequency, and greatly improves the stability of work.

Description

technical field [0001] The invention relates to a microcomputer protection measurement and control device, which belongs to the technical field of power equipment protection. Background technique [0002] With the continuous development of electronic information technology, the types and models of electrical equipment are becoming more and more diverse and complex, and their automation is getting higher and higher. Ensuring the normal operation of power equipment is an important prerequisite for the normal operation of every city and people's normal life, and it is also an important guarantee for the normal output of every production unit. For example, traditional circuit protection components such as glass tube fuses have long been eliminated, and microcomputer protection measurement and control devices are now being increasingly applied to various circuit protection systems, such as transformers used in large power plants for power transmission, and various components used...

AI Technical Summary

Problems solved by technology

[0003] However, there are still some defects in the existing microcomputer protection measurement and control devices.

On the one hand, most of the central processors of existing microcomputer protection measurement and control devices use single-chip microcomputers. Due to the limited computing power of single-chip microcomputers, the computing and processing capabilities of the entire microcomputer protection measurement and control devices are poor and the sampling frequency is low.

On the other hand, the existing microcomputer protection measurement and control devices have fewer types of protection circuits, a single type of protection mechanism, fewer dangerous situations that can be handled, and a smaller protection range.

Moreover, the circuit design of the existing microcomputer protection measurement and control device is relatively complicated, the work is unstable, and the maintenance cost in the later period is relatively high.

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