Graph Theoretic Loss Allocation Method for Microgrids having Variable Generation

With some assumptions and limitations, various methods have been developed in literature mainly for loss allocation in transmission network and afterwards extended for radial distribution network and some methods are specifically developed for radial distribution network. But, these methods are not suitable for microgrids which are integrated with conventional grid at sub-transmission and distribution levels depending on their geographical location. This paper presents a loss allocation method based on power flow results and relative position of buses for interconnected microgrid which is very effective in case of frequent change of generations due to intermittent nature of renewable resources. The implementation of the proposed method is very simple in microgrid with both meshed as well as radial topology without any computational complexity and requires only power flow solution and network data. The results are illustrated for different generating conditions of renewable sources in microgrid to demonstrate the efficiency of proposed loss allocation method.

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Keywords: Loss allocation , microgrid , Variable generation , Power flow solution , Relative position