Detection of inverse current component of the designed current filter

Based on the theoretical model of two-components “Г” analog LC current filters, the current filter was designed. The parameters of the power transformer to which filters are connected have a great impact on the current filters for relay protection. Based on the theory of four-ends the following was determined: relations between components, optimal reduction of the influence of disturbances and required values of the power the output of the current filters based on the given low frequency f (Hz). The selection of parameters of filter components that corresponds to the requirements of relay protection was performed.