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TopThe Proposed Aggregation Methodology
In power system analysis, bulk load supply points (BLSPs) at 11 kV, 33 kV or higher voltage levels are typically represented by aggregate system load models. In order to be accurate, these aggregate models should correctly represent not just the supplied loads, but also all network components (e.g., cables, transformers, or reactive power control elements), as well as all distributed generation units connected downstream the point of aggregation.
Aggregation of highly dispersed loads and MG units in typical distribution networks is not a simple task and there is virtually no work in this area in existing literature. In order to fill this gap, an aggregation methodology is introduced in this paper and discussed for residential load sector, where end-use loads and MG units are connected in parallel in LV networks. Figure 1 illustrates the general process of aggregation, which starts at LV level and proceeds to higher, i.e., MV levels (Collin, 2011a).
Figure 1. The proposed aggregation methodology