Scheduling Multiple Industrial Electrolyzers in Renewable P2H Systems: A Coordinated Active-Reactive Power Management Method
Utility-scale renewable power-to-hydrogen (ReP2H) systems typically consist of multiple electrolyzers (ELZs), many of which are powered by thyristor rectifiers (TRs). A TR-powered ELZ has a nonlinear and nondecouplable relation between its active and reactive loads. The on-off switching and load all...
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Published in | IEEE transactions on sustainable energy pp. 1 - 15 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
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IEEE
27.08.2024
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Abstract | Utility-scale renewable power-to-hydrogen (ReP2H) systems typically consist of multiple electrolyzers (ELZs), many of which are powered by thyristor rectifiers (TRs). A TR-powered ELZ has a nonlinear and nondecouplable relation between its active and reactive loads. The on-off switching and load allocation across multiple ELZs impact the efficiency of P2H energy conversion and the active and reactive power flows in the electrical network. Improper scheduling may result in an excessive reactive load from the hydrogen plant, causing voltage violations and increased network losses, which compromise both safety and profitability. To address these issues, this paper first explores the tradeoffs between the energy efficiency and reactive loads of ELZs. Then, we propose a joint active-reactive power management method to coordinate the loads and thermal properties of the ELZs, renewables, energy storage, and var compensation to improve the overall productivity and profitability. Mixed-integer second-order cone programming (MISOCP) is established to achieve these goals, and a decomposition algorithm enables its applicability in large-scale systems. Case studies show that the proposed method, at best, increases the hydrogen yield by 2.49% while reducing network losses by 3.12% compared to the state-of-the-art strategies based on wind and solar power data from Inner Mongolia, China. The optimal var resource configuration for ReP2H systems is also briefly discussed. |
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AbstractList | Utility-scale renewable power-to-hydrogen (ReP2H) systems typically consist of multiple electrolyzers (ELZs), many of which are powered by thyristor rectifiers (TRs). A TR-powered ELZ has a nonlinear and nondecouplable relation between its active and reactive loads. The on-off switching and load allocation across multiple ELZs impact the efficiency of P2H energy conversion and the active and reactive power flows in the electrical network. Improper scheduling may result in an excessive reactive load from the hydrogen plant, causing voltage violations and increased network losses, which compromise both safety and profitability. To address these issues, this paper first explores the tradeoffs between the energy efficiency and reactive loads of ELZs. Then, we propose a joint active-reactive power management method to coordinate the loads and thermal properties of the ELZs, renewables, energy storage, and var compensation to improve the overall productivity and profitability. Mixed-integer second-order cone programming (MISOCP) is established to achieve these goals, and a decomposition algorithm enables its applicability in large-scale systems. Case studies show that the proposed method, at best, increases the hydrogen yield by 2.49% while reducing network losses by 3.12% compared to the state-of-the-art strategies based on wind and solar power data from Inner Mongolia, China. The optimal var resource configuration for ReP2H systems is also briefly discussed. |
Author | Yang, Bosen Zhou, Buxiang Lin, Jin Li, Jiarong Zeng, Yangjun Qiu, Yiwei Chen, Shi Zhu, Jie |
Author_xml | – sequence: 1 givenname: Yangjun surname: Zeng fullname: Zeng, Yangjun organization: College of Electrical Engineering, Sichuan University, Chengdu, China – sequence: 2 givenname: Yiwei orcidid: 0000-0002-3402-7709 surname: Qiu fullname: Qiu, Yiwei organization: College of Electrical Engineering, Sichuan University, Chengdu, China – sequence: 3 givenname: Jie surname: Zhu fullname: Zhu, Jie organization: College of Electrical Engineering, Sichuan University, Chengdu, China – sequence: 4 givenname: Shi surname: Chen fullname: Chen, Shi organization: College of Electrical Engineering, Sichuan University, Chengdu, China – sequence: 5 givenname: Buxiang orcidid: 0000-0002-0799-2546 surname: Zhou fullname: Zhou, Buxiang organization: College of Electrical Engineering, Sichuan University, Chengdu, China – sequence: 6 givenname: Jiarong orcidid: 0000-0002-9868-0512 surname: Li fullname: Li, Jiarong organization: Department of Electrical Engineering, Tsinghua University, Beijing, China – sequence: 7 givenname: Bosen surname: Yang fullname: Yang, Bosen organization: Department of Electrical Engineering, Tsinghua University, Beijing, China – sequence: 8 givenname: Jin orcidid: 0000-0002-3435-7038 surname: Lin fullname: Lin, Jin organization: Department of Electrical Engineering, Tsinghua University, Beijing, China |
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Snippet | Utility-scale renewable power-to-hydrogen (ReP2H) systems typically consist of multiple electrolyzers (ELZs), many of which are powered by thyristor rectifiers... |
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SubjectTerms | Coordinated management electrolyzers Hydrogen Job shop scheduling Power system management Productivity Reactive power reactive power optimization Renewable energy sources renewable power-to-hydrogen (ReP2H) thyristor rectifier Voltage voltage security |
Title | Scheduling Multiple Industrial Electrolyzers in Renewable P2H Systems: A Coordinated Active-Reactive Power Management Method |
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