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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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2024-07-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309019 |
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| author | Weiwei JING Qiang WANG Hao CHENG Bo WANG Fuchang YUE Chen WANG Wenxue WANG |
| author_facet | Weiwei JING Qiang WANG Hao CHENG Bo WANG Fuchang YUE Chen WANG Wenxue WANG |
| author_sort | Weiwei JING |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-76f933df6e984ae692e5d41d74944617 |
| institution | OA Journals |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2024-07-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-76f933df6e984ae692e5d41d749446172025-08-20T02:04:31ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492024-07-0157720321310.11930/j.issn.1004-9649.202309019zgdl-57-04-jingweiweiNew Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy SystemsWeiwei JING0Qiang WANG1Hao CHENG2Bo WANG3Fuchang YUE4Chen WANG5Wenxue WANG6Lianyungang Power Supply Company of State Grid Jiangsu Electric Power Co., Ltd., Lianyungang 222000, ChinaJiangsu Qitian Electric Power Construction Group Co., Ltd., Lianyungang 222000, ChinaLianyungang Zhiyuan Electric Power Design Co., Ltd., Lianyungang 222000, ChinaLianyungang Power Supply Company of State Grid Jiangsu Electric Power Co., Ltd., Lianyungang 222000, ChinaLianyungang Power Supply Company of State Grid Jiangsu Electric Power Co., Ltd., Lianyungang 222000, ChinaSchool of Electrical and Power Engineering, Hohai University, Nanjing 211100, ChinaLianyungang Power Supply Company of State Grid Jiangsu Electric Power Co., Ltd., Lianyungang 222000, ChinaSteady-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.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309019electric-thermal interconnected integrated energy systemsteady-state power flowinterval power flowdecoupling calculationanalytical method |
| spellingShingle | Weiwei JING Qiang WANG Hao CHENG Bo WANG Fuchang YUE Chen WANG Wenxue WANG New Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy Systems Zhongguo dianli electric-thermal interconnected integrated energy system steady-state power flow interval power flow decoupling calculation analytical method |
| title | New Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy Systems |
| title_full | New Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy Systems |
| title_fullStr | New Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy Systems |
| title_full_unstemmed | New Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy Systems |
| title_short | New Rapid Decoupling Methods for Calculating Steady-State and Interval Power Flow of Integrated Electricity-Heat Energy Systems |
| title_sort | new rapid decoupling methods for calculating steady state and interval power flow of integrated electricity heat energy systems |
| topic | electric-thermal interconnected integrated energy system steady-state power flow interval power flow decoupling calculation analytical method |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309019 |
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