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The main goal of this paper is to present a novel model for a distribution company (Disco) energy acquisition in a competitive electricity market environment with interruptible load (IL) and distributed generation (DG). The work formulates the Disco energy acquisition model as a bilevel optimization problem with some real considerations, and then studies and designs an algorithm of this optimization problem too. In order to achieve this goal, a novel two-step procedure is proposed. At the first step, a real model for an industrial IL is introduced to examine how problem modeling and solving are affected by IL model. The introduced method shows a good performance of problem modeling and solving algorithm both in terms of solution quality and computational results. A Real case study is carried out considering a test system with some assumptions. Results show the general applicability of the proposed model, with potential cost saving for the Disco.