Fault detection method, low-voltage energy storage pre-operation device, controller and system

Abstract

The invention relates to the technical field of fault detection, in particular to a fault detection method based on a low-voltage energy storage pre-operation group device, a low-voltage energy storage pre-operation group device, a controller and a system. Among them, the fault detection method based on the low-voltage energy storage pre-operation group device includes first obtaining the high-voltage loop current collected by the high-voltage current transformer and the low-voltage current provided by the low-voltage energy storage pre-operation device, and then determining the high-voltage current according to the low-voltage current and the high-voltage loop current. Fault conditions in the power distribution system. Therefore, before the high-voltage power distribution system is operated, the low-voltage energy storage pre-operation group device detects the faults of the high-voltage power distribution system, and the fault state detection is accurate and reliable, thereby improving the reliability of the high-voltage power distribution system.

Description

technical field [0001] The invention relates to the technical field of fault detection, in particular to a fault detection method, a low-voltage energy storage pre-operation group device, a controller and a system. Background technique [0002] Distribution automation terminal equipment has been widely used in the distribution network. It not only efficiently realizes remote control, telemetry and remote signaling functions, but also plays an important role in system protection and detection, ensuring the stability of my country's power distribution network automation operation. . The main working mode of the distribution terminal is to connect to the distribution network automation system. After the system is inspected or eliminated, it receives the control command of the distribution automation system based on communication, and realizes the closing and opening of the circuit breaker when the state of the circuit breaker is correct. gate operation. But in fact, due to fac...

AI Technical Summary

Problems solved by technology

But in fact, due to factors such as personnel maintenance technology and equipment defects, there are factors such as the failure of the grounding switch to open, fault defects still exist, and insufficient preparation of the circuit breaker body, so that when the circuit breaker is closed, it is equivalent to directly closing the fault, which is harmful to the system. If the circuit breaker cannot be removed for a short time due to the defect of the circuit breaker body, it will have a great impact on the life of the equipment and the stability of the system; if the personnel are still in the maintenance state and misoperation occurs, it may cause casualties event

[0003] Therefore, it is necessary to accurately detect fault conditions such as grounding switch status or line faults, and the current detection methods have at least some disadvantages such as low reliability, complex logic coordination, and difficulty in realizing at the system terminal.

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