Distribution network relay protection device

Abstract

The invention relates to the technical field of power distribution protection, and discloses a power distribution network relay protection device. The power distribution network relay protection device comprises a central processing unit, an abnormal signal acquisition module, a 4G transmission module, a signal processing module, a protection execution module and an alarm module, wherein the inputend of the central processing unit is connected with the output end of the abnormal signal acquisition module separately; the output end of the signal processing module is electrically connected withthe output end of the protection execution module; the output end of the central processing unit is electrically connected with the input end of the abnormal signal acquisition module, the input endof the signal processing module, the input end of the protection execution module and the input end of the alarm module separately; and the output end of the abnormal signal acquisition module is in signal connection with the input end of the 4G transmission module. The power distribution network relay protection device is provided with the abnormal signal acquisition module, the signal processingmodule and the protection execution module, so that the relay protection device is divided into three parts, and independent operation and mutual control are carried out respectively, so that the relay protection device is clear and reasonable in structure and convenient in performing overall management.\

Description

technical field [0001] The invention relates to the technical field of power distribution protection, in particular to a relay protection device for a power distribution network. Background technique [0002] When the power components in the power system or the power system itself have a fault that endangers the safe operation of the power system, it can promptly send a warning signal to the operator on duty, or directly issue a trip command to the controlled circuit breaker to terminate the development of these events. Automatic measures and equipment, the complete set of equipment to realize this automatic measure, are generally referred to as relay protection devices. The relay protection device mainly uses the change of electrical quantity (current, voltage, power, frequency, etc.) when the components in the power system are short-circuited or abnormal to constitute the principle of relay protection action. [0003] The relay is an automatic switching electrical control...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a distribution network relay protection device, which has the advantages of fault early warning mechanism, reasonable structure optimization, reasonable network configuration, etc., and solves the problem that the traditional relay protection device does not have a fault early warning system and cannot Predict the occurrence of faults, and when the distribution network implements structural isolation of the power grid in the fault area and restores power supply to the network, the requirements for network communication are high, and multi-component centralized processing in a short time can easily cause network congestion.

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