Novel Method For Numerical Transformer Differential Protection Setting Up Using Its Detailed Mathematical Model

The authors are working on the creation of novel methods for setting up relay protection (RP) of modern power systems using detailed mathematical models that take into account the specific features of specific RPs and processes in instrument transformers. The use of such models in combination with an adequate power system simulator will eliminate the need to use approximate generalized coefficients for calculating the RP settings. In addition, this approach is flexible in terms of adaptation to new trends in the development of power systems. In the framework of this direction, a novel method for numerical transformer differential protection setting up using its model has been developed and presented in the article. It also presents the results of the study, which shown its effectiveness in terms of identifying modes with a high degree of risk of incorrect protection actions.