Abstract
The interaction between natural gas and electricity networks is becoming more significant due to the projected large penetration of renewables into the energy system to meet the emission targets. This is due to the role of gas-fired plants in providing backup to renewables as the linkage between these networks. Therefore, this paper proposes a deterministic coordinated model for the secure and optimal operation of integrated natural gas and electricity transmission networks by taking into account the N-1 contingency analysis on both networks. In order to reduce the computational burden and time, an iterative algorithm is proposed to select the critical cases and neglect other contingencies, which do not have a significant impact on the energy system. The proposed integrated mixed-integer nonlinear programming operational model is evaluated and compared to another enhanced separated model on the IEEE 24-bus and 15-node gas test systems. The results emphasize the importance and effectiveness of the proposed framework (up to 6.7% operational costs savings are achieved).
Highlights
According to International Energy Agency (IEA), global natural gas demand and the share of renewable energy are projected to increase by 1.6% and 12.4% in 2023, respectively [1,2].Gas-fired power plants (GFPPs) characterized by low carbon emissions, low investment cost, and high flexibility play a key role in maintaining the challenging issue of supply-demand balance in power systems with the ever-increasing penetration of renewable energy sources (RESs).GFPPs, the appearance of power-to-gas (P2G) technologies and gas compressors driven by electricity have intensified the linkage between the natural gas and electricity networks (NGEN) [3,4].From security perspectives, incidents such as outage of components in NGEN result in significant challenges in the operation of these networks to supply the energy demand
The proposed models are validated on the IEEE reliability testtransmission system (RTS) 24-bus electricity and 15-node gas test
Generator 9 is disconnected the rest of the network and can only supply loads on bus 7, which has happened with load from the rest ofatthe network shedding certain times.and can only supply loads on bus 7, which has happened with load shedding at certain times
Summary
Gas-fired power plants (GFPPs) characterized by low carbon emissions, low investment cost, and high flexibility play a key role in maintaining the challenging issue of supply-demand balance in power systems with the ever-increasing penetration of renewable energy sources (RESs). Incidents such as outage of components in NGEN result in significant challenges in the operation of these networks to supply the energy demand. The security and reliability of each network directly influences the other energy vector. As a result, this interaction between these networks highlights the importance of integrated operation of NGEN to enhance the energy system security [5,6,7]
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