Digital computing enhanced high-reliability low-voltage distribution safety monitoring system

Abstract

The invention discloses a digital computing enhanced high-reliability low-voltage distribution safety monitoring system which comprises a system information acquisition module, an edge computing server and a cloud data center, the system information acquisition module and the edge computing server exchange information through a field bus, the edge computing server and the cloud data center are connected through a 5G mobile network, and the cloud data center is used for a user to perform access monitoring; the system information acquisition module comprises a voltage information module used for acquiring voltage information, a current information module used for acquiring current information and a primary and secondary fusion equipment information module used for acquiring related information of primary and secondary fusion equipment. According to the invention, a high-reliability electricity utilization safety monitoring system is constructed.

Description

technical field [0001] This patent relates to the technical field of electric power safety monitoring, in particular to a high-reliability low-voltage power distribution safety monitoring system enhanced by digital calculation. Background technique [0002] Traditional low-voltage power distribution safety monitoring devices, such as various relays, are generally judged by analog calculation with simple threshold setting, and the following disadvantages generally exist in its application: (1) Single-variable threshold analog calculation has a high misjudgment rate. For example, a single-phase residual current protector will act and trip as long as the residual current exceeds 30mA. When there is a surge voltage or lightning overvoltage on the power supply, there will be malfunctions, and when the insulation resistance drops in rainy days, malfunctions will also occur. (2) The accuracy of the safety device is low. The traditional relay protection is operated by switching val...

AI Technical Summary

Problems solved by technology

When there is a surge voltage or lightning overvoltage on the power supply, there will be malfunctions, and when the insulation resistance drops in rainy days, malfunctions will also occur.

(2) The accuracy of the safety device is low. The traditional relay protection is operated by switching value. Accuracy is not high

(3) The reliability of components is low. The components of traditional relay protection are all components based on the principle of electromagnetic action. Their detection characteristics and action characteristics are affected by many environmental factors, and their reliability is very poor. The influence of physical properties, etc.

Due to the rapid development of electronic information technology, microcomputer relay protection devices have not been widely used, and the technology is relatively backward

Looking at the microcomputer relay protection device with today's technical conditions, its backwardness is mainly manifested in the following aspects: (1) The reliability of the device is low. The system structure of the microcomputer relay protection device is generally a central processing unit of a microprocessor plus external equipment. structures, their performance and reliability vary considerably

(2) The computing power is not enough. The computing power of the microcomputer relay protection device is limited to the Boolean algebra operation that replaces the relay, and the simple analog quantity processing, which is far inferior to today's various application-specific integrated circuits.

(3) Single-machine operation cannot be coordinated by multiple machines. The disadvantage of single-machine operation is that it is not convenient to form multi-variable criteria

For example, in the residual current protection device, the classifier criterion composed of binary variables of current value and current change value cannot be realized

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