Smart Distribution Power Losses Estimation: A Hybrid State Estimation Approach

This paper presents a method to estimate and identify technical and non-technical power losses in distribution systems based in a hybrid state estimation approach. The proposed method is divided in two steps. In the first step, non-technical power losses are detected, identified and corrected using a geometrical based state estimator technique. In the second step, a pattern recognition technique is applied on consumers aiming intelligent weight of load measurements. On this second step, power losses are estimated with the updated weight matrix. The proposed approach was numerically analyzed in a 69-bus distribution system considering an advanced metering infrastructure. The results show a potential improvement of the proposed method when compared with the state-of-the-art residual based state estimator approach.