Abstract
The on-load tap changing transformer can maintain voltages at desired levels by changing the tapping in primary winding of the transformer according to the load. It plays an important role in smart distribution grid. The key part of on-load tap changing transformers is on-load tap changer (OLTC), which is a complex mechanical device. The diverter switch of OLTC is traditionally accomplished in the oil. The Oil will be stained by arcing during operation and must be consequently purified by an oil filter. In order to reduce the disadvantages of conventional oil switching OLTC, OLTC applied with vacuum switch is presented in this paper. This vacuum OLTC is driven by permanent magnetic actuator. The capacity and the switching reliability of the vacuum OLTC are remarkably enhanced. The electrical life as well as the maintenance interval of the OLTC has been extended. In consideration of the electromagnetic field on site, Programmable Logic Controller (PLC) is applied to the intelligent controller of OLTC. The action sequence of the vacuum diverter switch is programmed based on the structure of vacuum OLTC. The controller using PLC can greatly decrease the complexity of the OLTC control system and effectively improve the reliability and stability of the vacuum OLTC.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
