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首页> 外文期刊>Electric power systems research >Non-steady state electro-thermally coupled weather-dependent power flow technique for a geographically-traversed overhead-line capacity improvement
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Non-steady state electro-thermally coupled weather-dependent power flow technique for a geographically-traversed overhead-line capacity improvement

机译：非稳态电热耦合天气相关功率流技术，用于地理上架空线容量的改善

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摘要

Overhead lines rated under conventional line rating techniques have limited power transfer capacity to avoid congestion and line overloading. Rating and operating them under actual weather and loading conditions with electro-thermally coupled parameters can significantly increase line loadability. As a result, line congestion and overloading can be minimized, thus avoiding load shedding. This paper presents an electro-thermally coupled (ETC) line rating technique for an overhead line passing through a large geographical area and exposed to multiple weather conditions. The presented technique, using a dynamic weather scenario, was found to enable efficient and reliable transfer of excess electricity to avoid load shedding. Because the line passed through a large geographical area, regions exposed to the worst weather exhibited the lowest thermal and current loadability with regard to electricity transmission. This paper therefore focuses on these spans to find the line temperature, temperature-dependent line AC resistance, branch active power flow and bus voltage magnitude based on timeand space -dependent weather conditions in comparison to time- and space-independent weather conditions, using the newly developed weather-integrated power flow tool. The paper also addresses the sensitivity between weather-dependent line temperature and associated weather across critical spans, where weather affecting critical spans is used to determine the line temperature.
机译：在常规线路额定技术下进行额定的架空线路具有有限的功率传输能力，以避免拥塞和线路过载。使用电热耦合参数在实际天气和负载条件下对它们进行评级和操作可以显着提高线路的负载能力。结果，可以使线路拥塞和过载最小化，从而避免了负载减少。本文提出了一种电热耦合（ETC）线额定值技术，该技术适用于穿越大地理区域并暴露于多种天气条件的架空线。发现使用动态天气情况的所提出的技术能够有效且可靠地传输多余的电力，以避免负载减少。由于该线路穿过较大的地理区域，因此在电力传输方面，遭受最恶劣天气影响的区域显示出最低的热负荷和电流负荷能力。因此，本文着重于这些跨度，以与时间和空间无关的天气状况为基础，与时间和空间无关的天气状况相比，根据时间和空间来查找线路温度，温度相关的线路交流电阻，支路有功功率流和母线电压幅值。新开发的天气集成式潮流工具。本文还讨论了取决于天气的线温度与跨关键跨度的相关天气之间的敏感性，其中影响关键跨度的天气用于确定线温度。

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