Topology error processing in distribution networks by normalized residuals analysis of three-phase models

摘要

In recent times the automation level of distribution networks (DN) are growing. Different calculation methods are beginning to appear in the area to monitor operation conditions. One such method is state estimation (SE). The current power system model is necessary for most of calculations. These models should be three-phase to simulate usymmetrical operation conditions. Taking into consideration that DN have a large scale and a lot of control objects, and some of their equipment does not have state signals, model information updating is difficult task for topology processor. Consequently, some equipment in the current model may be in a wrong state. Thus, topology errors analysis is of crucial importance for DN. There is the method that utilized SE results for checking of network element states. It based on normalizing residuals analysis and can be apply to positive sequence power system models. The method does not affect the SE duration, since it can be performed on an individual computer. The paper proposes modified topology error processing for three-phase power system models. It can be employed for errors detection and identification in DN equipment state.