Medium voltage switchgear secondary control loop simulation practical training platform and programmable logic controller logical judgment method thereof

Abstract

The invention discloses a medium voltage switchgear secondary control loop simulation practical training platform and a programmable logic controller logical judgment method thereof. The practical training platform comprises a base (1), a mounting plate (2), a programmable controller (6), a change-over switch, indicator lamps, connecting sheets, a power switch, relays, a relay protection unit anda terminal strip; the programmable controller (6) is adopted for replacing a high voltage vacuum circuit breaker, the medium voltage switchgear secondary control loop simulation practical training platform is economical and practical, and the logical judgment method is simple and reliable. By means of the practical training platform, map recognition, wiring, control principles, the relay protection action situation, the analog control operation, secondary loop trouble shooting and other practical operation practices of a medium voltage switchgear secondary control loop can be achieved for practical training or assessment. Through skill training of the practical training platform, understanding and grasping of students about secondary principles and wiring can be trained while professionaltechnical knowledge is deeply understood. By means of the medium voltage switchgear secondary control loop simulation practical training platform and the programmable logic controller logical judgmentmethod thereof, the problems of all middle and senior colleges or training institutions about secondary loop practical training, assessment and the like of medium voltage switchgears in a power system can be effectively solved.

Description

technical field [0001] The invention relates to a simulation training platform for a secondary control circuit of a medium-voltage switchgear and a logic judgment method for a programmable logic controller thereof. Background technique [0002] Medium-voltage switchgear is an important equipment in power plants and substations, which is used to control, protect and display primary equipment. At present, most of the training for the secondary control circuit of medium-voltage switchgear is written or video textbooks or materials. , relying on the oral explanations of the training teachers; the assessment of electrical skills related to the secondary control circuit of the switchgear is mostly the assessment of theoretical knowledge and the assessment of practical operation; High safety requirements, and there are many high-voltage equipment on site, it is not allowed to conduct training operations or experiments on the equipment, and it is easy to cause safety accidents to af...

AI Technical Summary

Problems solved by technology

[0002] Medium-voltage switchgear is an important equipment in power plants and substations, which is used to control, protect and display primary equipment. At present, most of the training for the secondary control circuit of medium-voltage switchgear is written or video textbooks or materials. , relying on the oral explanations of the training teachers; the assessment of electrical skills related to the secondary control circuit of the switchgear is mostly the assessment of theoretical knowledge and the assessment of practical operation; High safety requirements, and there are many high-voltage equipment on site, it is not allowed to conduct training operations or experiments on the equipment, and it is easy to cause safety accidents to affect the operation of on-site equipment, so the switch cabinets in general power plants and substations can only be closed and opened The training related to the operating procedures cannot provide practical training on the operation of the medium voltage switchgear, the wiring of the secondary control circuit, the troubleshooting of the secondary wiring, the relay protection test, etc., resulting in unsatisfactory training results and the lack of hands-on ability of the trainees , the theory and practice have not been combined, and the ability to deal with problems has not been exercised

[0003] At present, there are some simulation training systems for related equipment in power plants and substations on the market, such as the DC speed control training platform for DC speed control training, and the 10kV typical customer power distribution room simulation training system for Simulation training for power distribution system, secondary circuit maintenance training system is for secondary equipment maintenance training, etc., are not aimed at the principle, wiring, operation, relay protection test, etc. of the secondary circuit control circuit of medium voltage switchgear For a comprehensive training system, due to the high price of vacuum circuit breakers, the cost of directly purchasing medium-voltage switchgear for practical training and assessment is too high

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