TY - JOUR
T1 - Optimal inter- and intra-hour scheduling of islanded integrated-energy system considering linepack of gas pipelines
AU - Bao, Zhejing
AU - Chen, Dawei
AU - Wu, Lei
AU - Guo, Xiaogang
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/3/15
Y1 - 2019/3/15
N2 - In an integrated energy system (IES), such as electricity-heating-gas system, remarkable difference in response time among multiple energy subsystems make the overall energy scheduling a challenging issue. Meanwhile, storage capabilities, such as inherent storage capability of gas pipelines, provide a potential way to improve system scheduling flexibility. In this paper, an optimal scheduling approach for IES operated in an islanded mode is developed, while covering inter- and intra-hour timescales simultaneously. Specifically, in inter-hour timescale, steady-state models of individual energy subsystems are used, and the heuristic particle swarm optimization (PSO) is integrated into the decomposition-based sequential multi-energy flow (MEF) calculation to derive optimal scheduling of CHPs and flow rates of gas sources with respect to forecasts of renewable energy sources (RESs); While in intra-hour timescale, with the dynamic model of gas flows, the optimal range of pressure of gas source node is scheduled to ensure robustness against RES uncertainties while leveraging storage capabilities of gas pipelines. An integrated energy test system is studied to demonstrate effects of integrated inter-hour and intra-hour schedules in handling different dynamic response time and effects of storages capabilities of gas linepack in achieving robust operation against uncertainties.
AB - In an integrated energy system (IES), such as electricity-heating-gas system, remarkable difference in response time among multiple energy subsystems make the overall energy scheduling a challenging issue. Meanwhile, storage capabilities, such as inherent storage capability of gas pipelines, provide a potential way to improve system scheduling flexibility. In this paper, an optimal scheduling approach for IES operated in an islanded mode is developed, while covering inter- and intra-hour timescales simultaneously. Specifically, in inter-hour timescale, steady-state models of individual energy subsystems are used, and the heuristic particle swarm optimization (PSO) is integrated into the decomposition-based sequential multi-energy flow (MEF) calculation to derive optimal scheduling of CHPs and flow rates of gas sources with respect to forecasts of renewable energy sources (RESs); While in intra-hour timescale, with the dynamic model of gas flows, the optimal range of pressure of gas source node is scheduled to ensure robustness against RES uncertainties while leveraging storage capabilities of gas pipelines. An integrated energy test system is studied to demonstrate effects of integrated inter-hour and intra-hour schedules in handling different dynamic response time and effects of storages capabilities of gas linepack in achieving robust operation against uncertainties.
KW - Integrated energy system (IES)
KW - Multi-energy flow (MEF)
KW - Particle swarm optimization (PSO)
KW - Scheduling
KW - Uncertainty
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U2 - 10.1016/j.energy.2019.01.016
DO - 10.1016/j.energy.2019.01.016
M3 - Article
AN - SCOPUS:85060332404
SN - 0360-5442
VL - 171
SP - 326
EP - 340
JO - Energy
JF - Energy
ER -