Benefits & best practices of numerical busbar protection scheme designs

The application of numerical busbar protection technology is lagged behind that of other protection functions, although static technologies is still usual for busbar protection but the latest numerical technology provides security, dependability and much greater range of facilities. In comparing with conventional high impedance schemes numerical schemes are more complex, more facilities and much high component to count, so the engineering of busbar protection is vital. This paper presents engineering aspects & benefits of numerical busbar protection with all the functions required to be catered for different type of bus bars, also it presents an example of standard solution supplied for National grid UK with the consideration of various factors such as different protection functions, systems redundancy, online testing and monitoring facilities.