Abstract
This paper proposes an integrated model of power-toammonia (P2A) to exploit the inherent operational dispatchability of nitrogen-ammonia (N2-NH3) cycles for high-renewable multienergy systems. In this model, the steady-state electrolytic process is mathematically formulated into a thermodynamic system based on thermo-electrochemical effects, and the long-term degradation process of P2A is transformed as the short-term degradation cost to characterize its cost-efficiency. Furthermore, the enhanced utilization of P2A is explored to form a renewable energy hub for coupled multi-energy supplies, and a coupling matrix is formulated for the optimal synergies of electrical, ammonia and thermal energy carriers. An iterative solution approach is further developed to schedule the hub-internal multi-energy conversion and storage devices for high-efficiency utilization of available hybrid solarwind renewables. Numerical studies on a stand-alone microgrid over a 24-hour scheduling periods are presented to confirm the effectiveness and superiority of the proposed methodology over regular battery and power-to-gas (P2G) storages on system operational economy and renewable energy accommodation
Original language | English |
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Journal | IEEE Transactions on Power Systems |
Volume | 35 |
Issue number | 6 |
Pages (from-to) | 4769 - 4780 |
ISSN | 0885-8950 |
DOIs | |
Publication status | Published - 2020 |
Keywords
- Energy hub
- Integrated energy system
- Microgrid
- Power-to-ammonia
- Renewable energy