Active power loss allocation in radial distribution networks with different load models and DGs

摘要

Owing to huge penetration of distributed generators (DGs) and subsequent flow of reverse currents in power distribution networks, loss allocation (LA) has become very complicated which gets further complicated for different load models and DG power injections. In this context, this paper develops a new circuit theory-based branch oriented LA technique which simplifies the difficulties associated with the decomposition of cross-term of power loss equation mathematically, without any assumptions and approximations. It assigns the exact amount of losses to the network participants with due consideration to their load demands, power factors and geographical locations with/without DGs at various load models without normalisation. The effectiveness of the proposed LA procedure is not only investigated simply at different load models rather with various types of DG penetrations (i.e. Unity power factor DGs, Zero power factor DGs, Leading power factor DGs and Lagging power factor DGs) considering two test distribution systems i.e. 9-bus and 33-bus and the results are compared with that of the other existing techniques: Proportional sharing method, Quadratic method, Exact method and Cross term decomposition method. The performance analysis of the LA method with respect to load power factor variation is the other highlight of the paper.