IOLTC2020 On-load Switch On-Line Monitoring System

On-load tap changer (On-load Tap Changer-OLTC) is a key component of on-load tap-changer, and the failure rate is up to 20%, accounting for 40% of the total fault of the on-load tap-changer. The monitoring of the on-load tap-changer is particularly important for reducing the failure rate of the transformer.

The on-load tap-changer on-line monitoring system (IED) obtains data information (current and voltage rms) from the process layer network and obtains the on-load tap-changer gear status from the on-load switch controller and records the number of operations, OLTC anomalies State (such as power failure, refused to move) and other information; the system can increase the controller to achieve on-load tap-changer on-site control and based on network control.