Isolation switch contact temperature monitoring model for GIS shell and environment temperature measurement

Abstract

The invention belongs to the technical field of on-line monitoring temperature of contact temperature of a gas insulated composite appliance, in particularly relates to an isolation switch contact temperature monitoring model for GIS shell and environment temperature measurement. A GIS isolation switch temperature rise test loop is used for providing experimental large current to a GIS isolation switch and comprises a large current generator, a bus 1, a circuit breaker and a bus 2 connected in order, and the large current generator, the bus 1, the circuit breaker and the bus 2 are connected in series and then are connected to the GIS isolation switch to form an experimental loop. The GIS isolation switch comprises a GIS isolation switch and a shielding cover which is arranged outside the GIS isolation switch. A sensor is arranged at the surface of a GIS isolation switch shell and is used for testing a shell temperature in a test. The model can be widely applied to GIS isolation switch contact temperature monitoring based on GIS isolation switch shell and environment temperature measurement, and a simple and easy method is provided for GIS isolation switch contact temperature monitoring research.

Description

technical field [0001] The invention belongs to the technical field of on-line temperature monitoring of gas insulated switches (Gas Insulated Switchgear, GIS), and specifically relates to a GIS isolating switch temperature rise experiment, a GIS isolating switch shell, an arrangement of environmental sensors, and a GIS isolating switch contact temperature monitoring algorithm. Background technique [0002] Gas Insulated Switchgear (GIS) is not affected by the environment, short construction and installation time, low construction cost, safe and reliable operation, less maintenance workload, low operating cost, free from radio interference, small footprint, etc. Advantages Rapid development and widely used in high voltage and extra / ultra high voltage fields of power systems, and will be applied on a larger scale in the future. [0003] However, the joints used in large quantities in GIS equipment (such as disconnectors, busbars, and circuit breakers) are often due to insuffi...

AI Technical Summary

Problems solved by technology

[0005] At present, it is impossible to directly arrange sensors on the contact to monitor its temperature, and there are few related studies on GIS contact temperature monitoring

Some scholars proposed to use the experimental data to carry out the least squares fitting on the corresponding relationship between the temperature rise of the busbar contact and the single-point temperature rise of the shell, and then use the single-point temperature rise of the shell to reverse the temperature rise of the busbar contact. The contact temperature monitoring of temperature provides a new idea, but the monitoring accuracy and accuracy are still difficult to meet the requirements of practical engineering applications.

Some scholars also measured the temperature of multi-point housing, ambient temperature and isolating switch contact through experiments, and used neural network to fit the relationship between ambient temperature, housing temperature and contact temperature of isolating switch, so as to indirectly monitor the isolation by using ambient temperature and housing temperature. Switch contact temperature, due to the limited experimental data, and the neural network training network is suitable for large sample data, and its calculation can only get the local optimal solution instead of the global optimal solution, so it is still necessary to explore better methods to monitor the contact temperature. head temperature

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