Intelligent temperature control system for protecting arc-extinguishing medium of SF6 circuit breaker in alpine region from being liquefied

Abstract

The invention discloses an intelligent temperature control system for protecting the arc-extinguishing medium of an SF6 circuit breaker in an alpine region from being liquefied, and relates to the high-voltage electrical field. The invention aims at effectively increasing the temperature of the arc-extinguishing medium of the SF6 circuit breaker and the temperature of the working environment of an operating mechanism. The system consists of a heating band unit, a temperature display adjustment unit, a temperature collection and transmission unit, and a self-powered supply unit. The temperature collection and transmission unit enables the temperature data of an arc extinguish chamber and a circuit breaker cross beam box to be transmitted to the temperature display adjustment unit in a wireless mode, and the temperature display adjustment unit carries out the comparison processing of the data. A subsequent heating band circuit is driven to adjust the internal temperature of the arc extinguish chamber and the circuit breaker cross beam box. The system achieves the closed-loop control, effectively increases the temperature of the arc-extinguishing medium of the SF6 circuit breaker and the temperature of the working environment of the operating mechanism, and improves the work stability of the circuit breaker.

Description

technical field [0001] The invention relates to the electrical field, and mainly relates to an intelligent temperature control system for preventing the liquefaction of an arc-extinguishing medium of an SF6 circuit breaker in an alpine region. [0002] technical background [0003] SF6 gas is widely used in high voltage equipment due to its excellent insulation, arc extinguishing performance and high electric strength. my country has a vast territory and a large temperature difference between the north and the south. In some alpine regions with frequent frosts, the lowest temperature in some areas in winter can reach -40°C, and some areas can even reach -50°C. The liquefaction temperature of SF6 gas is relatively high, which limits its use in alpine regions For regional application, for example, at 0.1 MPa and 0.6 MPa, the liquefaction temperature of SF6 gas is about -64°C and -25°C respectively, and SF6 will liquefy, and the gas pressure in the arc extinguishing chamber will ...

AI Technical Summary

Problems solved by technology

[0004] At present, the external heating belt heating structure is mainly used in domestic alpine regions to heat the circuit breaker. However, due to the structural problems of the circuit breaker, the installation position of the heating belt used is relatively far from the arc extinguishing chamber, the heat utilization rate is not high, and there is no temperature acquisition unit inside the circuit breaker. The medium temperature of the arc extinguishing chamber cannot be accurately monitored, the temperature control effect of the arc extinguishing chamber is not good, the temperature difference is too large, and there is no precise temperature control system. This is why the traditional heating structure cannot solve the liquefaction of the arc extinguishing medium of SF6 circuit breakers in the alpine region. The main cause of the problem, this design tries a new idea, designs a comprehensive temperature control system and an effective heating structure

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