Precise Assessment of Technically Feasible Power Vector Interactions for Arbitrary Controllable Multi-Energy Systems

Multi-energy systems (MESs) can often deliver the same coincident power output via different combinations of power inputs. Therefore, they are characterized by an inherent flexibility. This paper focuses a special class of MES which comprise large compounds of conversion units, and their exact off-design characteristics (i.e., potentially noncontinuous, nonlinear, and nonconvex individual feasible regions). A methodology based on computational geometry is then suggested and applied to assess the available feasible operation region (or space) of the compound system. A brief case study of different thermo-electric MES focuses on general technical limitations in power output on the one hand, and limitations in the special case of contingencies on the other. Results prove that integrated energy systems show a significant flexibility in power output vector regulation if their individual off-design characteristics are considered properly.

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