New Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy Systems
Steady-state power flow calculation of integrated energy systems is fundamental to subsequent planning and operational studies. The commonly used Newton-Raphson method poses challenges in numerical stability. Moreover, with the increasing uncertainty in integrated energy systems, it becomes increasi...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
State Grid Energy Research Institute
2024-07-01
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| Series: | Zhongguo dianli |
| Subjects: | |
| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309019 |
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| Summary: | Steady-state power flow calculation of integrated energy systems is fundamental to subsequent planning and operational studies. The commonly used Newton-Raphson method poses challenges in numerical stability. Moreover, with the increasing uncertainty in integrated energy systems, it becomes increasingly vital to study the interval power flows for the safety analysis and evaluation of the integrated energy systems. Initially, based on the first and second order expansions of the Taylor function, the analytical expressions for heat load flow and nodal temperature are derived, which allow for the independent solution of flow rate and temperature, enabling the determination of system steady-state flow without solving equation set. And then, the monotonicity of the flow rate and temperature expressions is analyzed in conjunction with heat load values to determine the interval flow solutions for heat load flow and nodal temperature. The proposed method is fast in calculation speed and free from numerical stability problems while ensuring the computational accuracy. Finally, the effectiveness of the proposed method is validated through case study analysis. |
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| ISSN: | 1004-9649 |