The load flow calculation in radial electric networks with distributed generation under unbalanced and harmonic polluted regime

The growth of distributed generation (DG) which is consumer driven and not centrally planned presents a number of challenges and opportunities specific mainly to low voltage (LV) distributed networks. The growth of DG in order to meet the UK government´s environmental targets for 2010 will taken into consideration for example the following LV distribution network constraints: steady-state voltage limits, voltage unbalanced limits and harmonic limits. This paper presents an algorithm developed by the authors in order to perform load flow calculation in unbalanced and harmonic polluted low voltage radial networks with distributed generation. The authors propose to model the harmonic complex quantities (a set of complex quantities corresponding to each harmonic component) through abstract data types with complex parameters. For harmonic polluted and unbalanced radial electric networks that include distributed generators, it was considered the backward/forward sweep with some specifications and adaptations.