On-line early-warning system for traction transformer faults

Abstract

The invention provides an on-line early-warning system for traction transformer faults, which is characterized by comprising an industrial computer, a PLC, a main circuit and a sample which are successively connected in series, wherein a protection circuit is arranged between the industrial computer and the main circuit, and the main circuit comprises a power switch cabinet, a low-voltage switch cabinet, a high-voltage switch cabinet, a voltage regulator, a testing transformer and a voltage-current mutual inductor. The system can carry out comprehensively on-line test and pre-warning on a traction transformer so as to ensure that all indexes of the traction transformer are normal and the operation is reliable.

Description

technical field [0001] The invention belongs to the technical field of electric locomotive equipment monitoring, and in particular relates to an online early warning system for traction transformer faults. Background technique [0002] There are many test items for electric locomotive transformers, and there are corresponding control requirements and different control accuracy. In the past, intermediate relays and contactors have been used in the system structure to control the adjustment and conversion of the test power supply. The equipment is bulky and has a high failure rate, which makes it difficult to meet the requirements of the test; because the system with this structure must be manually controlled and adjusted, Therefore, it is difficult to guarantee the scientific nature of the test results in the test. Moreover, the transformer test system has high requirements on the power supply. During the test, the 8 sets of power supplies not only have high-voltage and high...

AI Technical Summary

Problems solved by technology

In the past, intermediate relays and contactors have been used in the system structure to control the adjustment and conversion of the test power supply. The equipment is bulky and has a high failure rate, which makes it difficult to meet the requirements of the test; because the system with this structure must be manually controlled and adjusted, Therefore, it is difficult to guarantee the scientific nature of the test results in the test.

Moreover, the transformer test system has high requirements on the power supply. During the test, the 8 sets of power supplies not only have high-voltage and high-current power supply systems, but also voltage and current stabilization systems, and the operation logic is very complicated.

Therefore, if manual relay control is adopted, not only the work efficiency is low, the system volume is huge, the capital investment is large, but also it is difficult to meet the control requirements.

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