Mechanical-state on-line monitoring device of transformer winding

Abstract

The invention provides a mechanical-state on-line monitoring device of a transformer winding. The output end of an electricity quantity sensor is connected with a synchronous square wave conversion circuit and an anti-aliasing low-pass filter, and the anti-aliasing low-pass filter is connected with a control unit sequentially through an amplitude-limiting circuit and an A / D conversion circuit, the synchronous square wave conversion circuit is connected with the A / D conversion circuit sequentially through a zero cross detection circuit, a modified phase locking frequency multiplier circuit and a sampling control selection circuit; the control unit comprises a single-chip microcomputer unit and a digital signal processor, the single-chip microcomputer unit and the digital signal processor are connected through a double-port RAM, the digital signal processor carries out transformer short-circuit impedance calculation on electric parameter digital signals sent by the A / D conversion circuit, and the single-chip microcomputer unit stores and displays the data and sends the data to an electricity system monitoring platform. Compared with the prior art, the mechanical-state on-line monitoring device of the transformer winding can carry out real-time on-line monitoring on transformer short-circuit impedance, avoid a sudden breakdown of a transformer due to sudden mechanical faults, and largely improve the operation reliability of the transformer.

Description

technical field [0001] The invention relates to a transformer monitoring device, in particular to an online monitoring device for the mechanical state of a transformer winding. Background technique [0002] As one of the most important hubs of the power system, the power transformer's safe operation is directly related to the safety and reliability of the power generation and power supply system. If a large-scale power transformer has an accident during the operation of the power generation and power supply system, it may cause a large-scale power outage and seriously affect people's production and life. Among them, the core component winding of the power transformer is one of the components that cause many failures of the power transformer. Therefore, monitoring the winding deformation of the power transformer is an important means to ensure the normal operation of the power transformer. However, in the prior art, the monitoring of the winding Usually, preventive tests are...

AI Technical Summary

Problems solved by technology

If a large-scale power transformer has an accident during the operation of the power generation and power supply system, it may cause a large-scale power outage and seriously affect people's production and life.

Among them, the core component winding of the power transformer is one of the components that cause many failures of the power transformer. Therefore, monitoring the winding deformation of the power transformer is an important means to ensure the normal operation of the power transformer. However, in the prior art, the monitoring of the winding Preventive tests are usually used, and regular preventive tests cannot take into account the actual operating conditions of power equipment, excessive maintenance and unnecessary shutdowns may occur, and winding defects cannot be found in time

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