98-15U

It was proved that the displacements representation in the statistical operator is equivalent to some cyclic transformation of Fermi system partition function. On this base for the strongly coupled systems the renormalized thermodynamical perturbation theory was formulated. The obtained diagrams are built on the effective interaction potential which takes into account the local-field-type effects. The correlation energy, pair distribution functions and the moment distribution of particles calculated in the frames of random phase approximation in proposed method are close to results obtained in the local-field approximation.