Assessing the Normalized Residuals Technique with AMB-SE for Non-Technical Loss Detection

This paper investigates the potential of using the so-called Admittance Matrix-Based State Estimator (AMB-SE), plus the normalized residuals technique, for detecting non-technical losses in distribution systems. The AMB-SE presents a constant coefficient matrix, which simplifies the implementation and reduces significantly the computational burden of the state estimation process. However, AMB-SE adopts the concept of equivalent measurements and, therefore, the normalized residuals analysis is performed over the equivalent measurements instead of the actual measurements. This issue is discussed and an adequate way to understand the normalized residuals analysis is presented. The simulations show that the proposed approach has potential do be used for detecting non-technical losses in distribution systems.