| 架空输电线路电热耦合的并网阈值估算研究 |
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| 引用本文：柳明贤?覮，李继标，李凯.架空输电线路电热耦合的并网阈值估算研究[J].计算技术与自动化,2020,(3):37-43 |
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| 中文摘要:对于通过架空输电线路与主系统相连的风电场，其系统吸收的可用风电不仅依赖于发电容量，还依赖于输电阈值。为此，研究了环境条件与功率转移极限之间的密切关系，建立了架空输电线路热平衡和输电运行的联立方程，推导了稳态稳定极限的最大传输功率，并将其表示为环境因子和线路长度的函数。进而提出了一种识别初始限制并获得相应阈值的方案。分析表明，在特定风速水平下，输电过程是决定临界值的关键因素。 |
| 中文关键词:架空输电线路 风电一体化 电热耦合 稳态稳定极限 |
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| Estimation of Grid-Connected Threshold for Electrothermal Coupling of Overhead Transmission Lines |
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| Abstract:For wind farms connected to the main system through overhead transmission lines，the available wind power absorbed by the system depends not only on the generating capacity，but also on the transmission threshold. This paper focuses on the close relationship between environmental conditions and power transfer limit，establishes a simultaneous equation of overhead transmission line thermal balance and transmission operation，derives the maximum transmission power of steady-state stability limit，and expresses it as a function of environmental factors and line length. Then a scheme is proposed to identify initial constraints and obtain corresponding thresholds. Case study shows that the transmission process is the key factor to determine the critical value at a given wind speed level. |
| keywords:overhead transmission lines wind power integration electrothermal coupling steady-state stability limit |
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