On-line monitoring system that can monitor the short-circuit force of transformers in operation

Abstract

The invention discloses an on-line monitoring system capable of monitoring short-circuit force applied to a running transformer. A first insulating stay is arranged on the inner side wall of a low-voltage coil of the transformer inside the system; a second insulating stay is arranged on the outer side wall of the low-voltage coil; an insulating supporting rod is arranged on the inner side wall of an oil tank wall of the transformer, and one end of the insulating supporting rod is fixedly connected with the inner side wall of the oil tank wall; a first radial pressure sensing module is arranged between an iron core of the transformer and the first insulating stay; a second radial pressure sensing module is arranged between the inner side wall of a high-voltage coil of the transformer and the second insulating stay; a third radial pressure sensing module is arranged between the outer side wall of the high-voltage coil and the other end of the insulating supporting rod; and signal output ends of the first radial pressure sensing module, the second radial pressure sensing module and the third radial pressure sensing module are connected with a computer. Compared with traditional methods for obtaining internal pressures of transformers through theoretical calculation, the system has stronger timeliness and accuracy, so that maintenance of the transformer by technical personnel is facilitated.

Description

technical field [0001] The invention relates to the technical field of transformer intelligent detection in power transmission and transformation equipment, in particular to an on-line monitoring system capable of monitoring the short-circuit force of a transformer in operation. Background technique [0002] With the expansion of the capacity of the power system, the operating conditions for the transformer to withstand the short circuit of the power system are more stringent. The power system generally puts forward specific requirements for the ability of the transformer to withstand short-circuit, such as conducting a short-circuit test and reviewing the calculation report of the transformer coil's ability to withstand short-circuit. Due to the long period and high cost of the transformer short-circuit test, and the short-circuit test of some ultra-large-capacity transformers is difficult to complete under the existing conditions, most transformers can only evaluate their ...

AI Technical Summary

Problems solved by technology

Due to the long cycle and high cost of the transformer short-circuit test, and the short-circuit test of some ultra-large-capacity transformers is difficult to complete under the existing conditions, most transformers can only evaluate their ability to withstand short-circuit by calculation

However, due to the complex operating environment of the transformer, it is difficult to accurately obtain the impact force actually received by the transformer during the short-circuit process by theoretical calculation methods

Moreover, the timeliness of the theoretical calculation results is poor, and it cannot reflect the impact force actually received by the transformer during the short circuit process in real time.

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