Digital microcomputer protection measurement and control device

Abstract

The invention discloses a digital microcomputer protection measurement and control device. The device comprises a display screen, an operation panel, an indicating lamp, a controller, a relay output circuit, a communication interface, an input quantity input circuit, a voltage loop, a current loop, a grounding device and a power supply. An operation control loop is arranged in the controller and comprises a control power supply positive electrode, a tripping input, a tripping outlet, a closing input, a closing outlet and a control power supply negative electrode. According to the measurement and control device, the keys are used for task selection, six functions of sampling, parameters, value setting, events, clocks and outputting are achieved; whole-process digital control is achieved; the protection mechanism is comprehensive and accurate; corresponding protection can be conducted according to various different circuit conditions; and circuit safety is guaranteed; the device is high in operation processing capability and high in sampling frequency; and the working stability is greatly improved.

Description

technical field [0001] The invention relates to a digital 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 compone...

AI Technical Summary

Problems solved by technology

[0004] 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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