Online temperature measurement system of vacuum isolation circuit breaker

Abstract

The invention discloses an online temperature measurement system of a vacuum isolation circuit breaker. The online temperature measurement system comprises temperature measurement nodes, a temperature measurement device and a data processing device. The temperature measurement nodes are distributed on a vacuum isolation circuit breaker contact. The temperature measurement device comprises a passive wireless acoustic surface wave temperature sensor and a wireless antenna. The passive wireless acoustic surface wave temperature sensor makes contact with the temperature measurement nodes. The temperature of the temperature measurement nodes is measured through the temperature measurement device. The data processing device processes the temperature measured by the temperature measurement device, generates radio-frequency signals, and transmits the radio-frequency signals to the wireless acoustic surface wave temperature sensor. The passive wireless acoustic surface wave temperature sensor makes contact with the temperature measurement nodes so that acoustic surface wave signals which carry temperature information and are obtained by the passive wireless acoustic surface wave temperature sensor through conversion can change according to changes of the temperature of the temperature measurement nodes. The online temperature measurement system of the vacuum isolation circuit breaker has the advantages that the temperature of the temperature measurement nodes of the vacuum isolation circuit breaker contact can be measured in a passive and wireless mode, use is convenient, the structure is simple, and no power supply is needed by the sensor.

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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