A superconducting current limiter state monitoring system and state monitoring method

Abstract

A superconducting current limiter state monitoring system and method, comprising a superconducting current limiter body, a liquid nitrogen storage tank, a low temperature refrigeration system, a sensor assembly, a real-time data acquisition system and a monitoring system; the sensor assembly includes a voltage sensor, a temperature sensor, Pressure sensor and liquid level sensor; the real-time data acquisition system includes a voltage acquisition module, a temperature acquisition module, a pressure acquisition module and a liquid level acquisition module, which convert the sensor signal into the corresponding digital quantity; the monitoring system for the operating parameters of the superconducting flow limiter Carry out analysis and state monitoring; by collecting and transmitting the state parameters of the superconducting current limiter in real time, based on the fault criterion of the superconducting current limiter, the fault characteristics of the superconducting current limiter are analyzed, and the superconducting current limiter is realized. The status assessment of the current limiter, and the early detection and resolution of equipment defects, to avoid equipment and system failures, and to improve the reliability and stability of the entire system.

Description

technical field [0001] The invention belongs to the technical field of state monitoring, in particular to a state monitoring system and a state monitoring method for a superconducting current limiter. Background technique [0002] The superconducting current limiter uses the physical characteristics of superconducting state to normal state transition of superconductors to achieve the purpose of current limiting. The loss during normal operation is very low and can be automatically reset. It is an ideal current limiting device. Once a fault occurs, the DC short-circuit fault current cannot be effectively limited, which will lead to an unplanned outage, which directly threatens the safe and stable operation of the power grid. [0003] The superconducting current limiter is in the operating environment of ultra-low temperature, high voltage, and electromagnetic oscillation, which brings great difficulties to the state monitoring of the superconducting current limiter. Tradition...

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Problems solved by technology

[0004] At present, one of the most critical factors to realize the practical application of superconducting current limiter is to maintain the low temperature environment. It is difficult for the traditional state monitoring device of superconducting current limiter to ensure that the whole current limiting Synchronous collection of internal and external state information of the conduction current limiter and state assessment and fault analysis of the entire system, so it is very important for the online monitoring of state parameters such as liquid level, pressure and temperature of the superconducting current limiter and cryogenic container

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