On-line temperature monitoring system for high tension switchgear, and monitoring method thereof

Abstract

The invention brings forward an on-line temperature monitoring system for high tension switchgears, and a monitoring method thereof. The system comprises an infrared sensor, a digital temperature sensor, a data collector, a communication controller, a monitor center operator and a protocol converter. The infrared sensor and the digital temperature sensor are connected to the data collector. The data collector is connected to the communication controller, the monitor center operator and the protocol converter in sequence. The advantages are that high tension switchgears can be diagnosed intelligently, and state assessment and electric service life prediction can be performed on parts in high tension switchgears, so guidance is provided for running of a transformer station, reference is provided for electric power scheduling, and early warning is made for possible faults; and an effective means can be provided for trouble shooting, preventive unkeep transition and state maintenance for high tension switchgears, the running level of high tension switchgears is improved, the accident rate is reduced, and safe and reliable running of a transformer station can be ensured.

Description

technical field [0001] The invention relates to an on-line monitoring system and a monitoring method thereof, in particular to an on-line temperature monitoring system of a high-voltage switch cabinet and a monitoring method thereof. Background technique [0002] High-voltage switchgear is used for on-off, control or protection in power system power generation, transmission, distribution, power conversion and consumption. High-voltage switchgear is used as electrical products with a voltage level of 3.6kV ~ 550kV. Switches, high-voltage load switches, high-voltage automatic reclosers and sectionalizers, high-voltage operating mechanisms, high-voltage explosion-proof power distribution devices, and high-voltage switchgears. It has higher requirements for the use environment, such as the upper limit of the ambient air temperature does not exceed +40°C; the average value of the ambient air temperature for 24 hours does not exceed +35°C; the lower limit of the ambient air temper...

AI Technical Summary

Problems solved by technology

The high temperature in the switchgear makes it difficult for the internal heat of low-voltage electrical appliances to dissipate outward during operation, so after a certain period of time, the insulation will burn out due to aging; plastic insulated wires will also be thermally aged and broken down; Current-operated protectors and electronic meters will seriously affect the service life of the product when they are operated at high temperatures, and will also affect the stability of the protector's performance, the reliability of the action, and the accuracy of measurement; The reactive power compensation capacitors and fuses of the switchgear will also shorten the service life; the switchgear operates outdoors, it not only receives high temperature from direct sunlight, but also generates heat itself during operation, so in the midsummer high temperature season, the temperature inside the cabinet will be Reaching above +60°C, the temperature at this time greatly exceeds the ambient temperature specified in the "National Standard" of these electrical appliances, which will cause the failure of the switchgear

[0003] As far as the current technical situation is concerned, the monitoring of high-voltage switchgear is mostly based on manual inspection, and the temperature data in the switchgear is obtained with a hand-held infrared thermometer. The impact makes the infrared thermometer often unable to obtain accurate temperature data; at the same time, errors in manual operation cannot be completely avoided, and the inspection time interval is too long compared to the fault development time

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