A new loss of grid protection based on power measurements

The growth in the use of embedded generation operating in parallel with electric utility distribution systems has increased the importance of loss of grid protection. A new loss of grid protection algorithm is described in this paper which has been designed to be amenable to inclusion in a multi-function numeric protection package. In particular, it has been designed to detect, reliably, a loss of grid within 120 milliseconds, remain stable during other power system disturbances and demand a minimum of processing resources of the microcomputer host relay