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A novel load flow algorithm for radial distribution networks with dispersed generation

During the planning and designing stage of power distribution networks development, a large number of load flow calculations have to be made. The purpose of these calculations is to check if the thermal constraints and voltage limits of network elements are breached in order to comply with the EN 50160 quality standard. With the integration of distributed generation, the once passive distribution networks are rapidly changing to active networks. As a consequence, the planners have to take into consideration the bidirectional power flow in distribution networks. Also, the existing power flow algorithms for unidirectional radial distribution feeders need to adapt to new circumstances. This paper considers a new iterative algorithm for load flow calculation of a radial distribution feeder with distribution lines represented by a detailed π equivalent model including dispersed generation. In so doing, the influence on voltage profile and technical power losses is analysed in cases with and without the connection of dispersed generation. The algorithm is implemented in Matlab programming language.

active distribution networks ; bidirectional power flow ; distribution line π equivalent model and dispersed generation

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