Vacuum isolation circuit breaker online temperature measurement system

Abstract

The invention discloses an online temperature measurement system for a vacuum isolation circuit breaker, which includes a temperature measurement node, a temperature measurement device and a data processing device. The temperature measurement nodes are distributed on the contacts of the vacuum isolation circuit breaker, and the temperature measurement device includes a passive wireless acoustic surface wave temperature sensor and wireless antenna, the passive wireless surface acoustic wave temperature sensor is in contact with the temperature measuring node, the temperature measuring device measures the temperature of the temperature measuring node, the data processing device processes the temperature measured by the temperature measuring device, and generates a radio frequency signal to transmit to Wireless surface acoustic wave temperature sensor. The passive wireless surface acoustic wave temperature sensor is in contact with the temperature measurement node, so that the surface acoustic wave signal with temperature information converted by the passive wireless surface acoustic wave temperature sensor can change according to the temperature change of the temperature measurement node. The vacuum isolation circuit breaker online temperature measurement system disclosed by the present invention has the characteristics of being able to realize passive wireless measurement of the temperature of each temperature measurement node of the vacuum isolation circuit breaker contact, convenient to use, simple in structure, and the sensor does not need a power supply.

Description

technical field [0001] The invention belongs to an on-line temperature monitoring system of a high-voltage switch device in a power system, in particular to an on-line temperature measurement system for a vacuum isolation circuit breaker. Background technique [0002] Switching products in the power system generate heat during operation, resulting in high temperature, which is the main cause of failure. At present, in the medium and high voltage field, such as vacuum circuit breakers and other high-temperature power systems, the known online temperature measurement technology includes three parts: temperature sensing part, temperature data processing part and temperature data display part. Based on these three parts, the technologies for online temperature measurement include: 1. Thermocouple temperature measurement; 2. Fiber Bragg grating temperature measurement; 3. Infrared temperature measurement; 4. Active wireless temperature measurement, etc. Thermocouple temperature ...

AI Technical Summary

Problems solved by technology

However, the operation characteristics of the power system require continuous and uninterrupted operation. After the battery fails, the replacement of the battery is a big problem; on the other hand, if the temperature in the working area is too high, there is a hidden danger of lithium battery explosion

[0005] 2. Adopt the small CT saturation power supply mode. When there is current in the primary circuit, a voltage power supply is induced by a small CT to supply power. When the primary circuit current is too small, the required power supply voltage cannot be sensed as the power supply. At this time, it cannot be real-time. Online temperature monitoring

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