The multifunctional numerical transformer protection and control system with adaptive and flexible features

For several decades, the power system protection relay has experienced many important changes, from a purely electromechanical type to the mixture of electronic and electromechanical type, then to fully static, and now fully numerical relays based on microprocessors. In the transformer protection area, similar changes can be seen. It is a dream for protection engineers to have a system that not only has many different functions for customer options, but also can be easily configured for different applications. On the other hand, it is expected to have control functions such as on load tap changer control function in combination with a protection system so that a protection and control system can be formed within one hardware and software system. With the fast development in the area of digital technology, the hardware and software must be possible to provide economic solutions regarding the cost of functions and hardware cards for a dedicated application. It is the motivation to build a powerful transformer protection and control system in order to fulfil the requirement from different applications. In this paper, distinct futures in the newly developed transformer protection and control system are presented.