Current online monitoring integrated system of on-load tap changer

Abstract

The invention relates to a current online monitoring integrated system of an on-load tap changer. The current online monitoring integrated system comprises a current acquisition device, a receiving device and a terminal machine, and is characterized in that the current acquisition device is fixedly arranged on the side of the on-load tap changer; the receiving device is arranged on the side of a control room; the current acquisition device is connected with the receiving device through an optical fiber; and the receiving device is connected with the terminal machine through a converting station network. The current acquisition device transmits optical digital signals to the receiving device while electrical high and low voltage side insulation is carried out through an optical fiber; and the receiving device frames the received primary current waveform data and sends to the converting station network, and simultaneously provides analogue signal for outputting. The primary current work waveform of the on-load tap changer is monitored in an online and real-time manner, the running state of the on-load tap changer can be effectively monitored, and electrical failures and mechanical failures of the on-load tap changer are diagnosed in real time; and the system sends out alarms if the on-load tap changer is in failure.

Description

technical field [0001] The invention relates to a monitoring device for an on-load tap changer of a transformer, which monitors the switching current of the on-load tap changer on-line. It belongs to the technical field of power devices. Background technique [0002] The on-load tap changer is a very important power transmission and distribution equipment in the power system substation. Voltage adjustment, to realize the on-load voltage regulation of the high-voltage transmission and distribution grid, so as to keep the system voltage of industrial power supply and residential power supply stable. This pressure regulation measure has a large pressure regulation range, less investment, and good effect. The pressure regulation range is generally 15% and above. The pressure regulation speed is fast, and at the same time, it can be adjusted at any time. The tap changer can be controlled manually or remotely and automatically, which is convenient for automation. The on-load ta...

AI Technical Summary

Problems solved by technology

[0015] The object of the present invention is to provide an integrated system for on-line current monitoring of on-load tap-changers in order to overcome the defects that the existing monitoring scheme cannot accurately and effectively monitor the dynamic process current of the on-load tap-changer in real time, and perform fault diagnosis and accurate early warning , the current acquisition device is installed inside the on-load tap-changer, which can directly monitor its switching current waveform online, and diagnose the working status of the on-load tap-changer contacts and the working status of mechanical parts through the current waveform record, and judge the fault in case of a fault source, providing field operation data for its maintenance and improvement

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