Reliability Improvement Strategies of Multi-Region Electricity-Hydrogen Integrated Energy Systems Considering Hydrogen Interaction between Different Regions
Meng Jun1, Ren Zhouyang1, Wang Hao2
1. State Key Laboratory of Power Transmission Equipment Technology School of Electrical Engineering Chongqing University Chongqing 400044 China; 2. Zunyi Power Supply Bureau Guizhou Power Grid Co. Ltd Zunyi 563000 China
Abstract：The multi-regional electric-hydrogen integrated energy systems (MR-EH-IESs) formed by the regional interconnection of distribution grids and hydrogen supply networks (HSNs) can give full play to the advantages of low-carbon and flexible operation of HSNs, which is of great significance to the construction of a low-carbon and safe modern energy system. However, the existing research have not analyzed the flexibility mechanism of multi-regional HSNs and the interaction characteristics of inter-regional hydrogen on the reliable supply of electric and hydrogen loads to the system under multiple fault scenarios. And the optimal load shedding model in the existing reliability assessment cannot consider inter-regional energy interactions and multi-regional energy synergistic mechanisms. Moreover, there is a lack of effective reliability assessment indexes for MR-EH-IESs to quantify the level of reliable energy supply of the system. It means that it is not possible to provide a rational decision-making basis for the planning and construction of MR-EH-IESs. A reliability assessment method for MR-EH-IESs under hydrogen interaction is proposed, which effectively quantifies the reliability level of HSNs flexible resources for MR-EH-IESs under different fault scenarios. Firstly, the cooperative operation mechanism and operation models of MR-EH-IESs are proposed considering the coordination between the inter-regional hydrogen interaction channels and the flexible resources of regional HSNs. Secondly, an optimal load shedding model of MR-EH-IESs considering the hydrogen interaction is established to minimize the total operation cost. Finally, the reliability evaluation indexes of MR-EH-IESs are constructed from the aspects of inter-regional energy interaction levels and their role in improving the reliability levels. A reliability evaluation method of MR-EH-IESs considering the hydrogen interaction is proposed based on Markov Chain Monte Carlo method. The effectiveness of the proposed method is verified by simulation example analysis. The results of the simulations demonstrate that, when considering the synergistic operation mechanism, the expected inter-regional hydrogen interaction and inter-regional electricity interaction of MR-EH-IESs are 31.79 t/year and 9 744.53 kW·h/year, respectively. This leads to improvement in hydrogen supply reliability (43.80%) and electricity supply reliability (6.12%). And its total system operating cost is reduced by 3.759 million yuan/year. In essence, fully exploiting and utilizing the inter-regional hydrogen interaction can effectively improve the system energy supply reliability and operational economics. Additionally, reasonable configuring the parameters, such as the unit penalty cost of hydrogen load shedding and the capacity of inter-regional hydrogen tube trailer, can maximize the cost-effectiveness of MR-EH-IESs. And this achieving a relative balance between energy supply reliability and operational economics in MR-EH-IESs. From the simulation results, the following conclusions can be drawn. (1) Considering the cooperative operation mechanism can make full use of the different characteristics of energy supply resources and energy demand in different regions, and effectively improve the reliability level of MR-EH-IESs through the coordination of inter-region hydrogen interaction channels and the flexible operation mechanism of intra-region HSNs. (2) Considering the cooperative operation mechanism can effectively reduce the total operation cost of the system, and the reasonable setting the unit penalty cost of hydrogen load shedding is conducive to guaranteeing the reliability level and economy level of MR-EH-IESs. (3) Increasing the capacity of inter-regional hydrogen tube trailer has a positive impact on enhancing the reliability of MR-EH-IESs, but this effect is limited by the availability and consumption of energy in each region.
蒙军, 任洲洋, 王皓. 氢能交互下的多区域电氢综合能源系统可靠性提升策略[J]. 电工技术学报, 2024, 39(16): 5011-5027.
Meng Jun, Ren Zhouyang, Wang Hao. Reliability Improvement Strategies of Multi-Region Electricity-Hydrogen Integrated Energy Systems Considering Hydrogen Interaction between Different Regions. Transactions of China Electrotechnical Society, 2024, 39(16): 5011-5027.
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2024, Vol. 39 
