输电支路参数与电压等级的相关性
Interdependence of Transmission Branch Parameters on the Voltage Levels
摘要：
Transformers和输电线路是电网的关键部件。本文分析了输电支路电气参数的统计特性，特别是研究了它们对电压水平的依赖性。一些有趣的发现包括：（a）通过MVA额定值的适当转换，Transformers器每单位电抗表现出与电压水平和容量无关的一致的统计模式;（b）输电线路的分布电抗（欧姆/千米）也具有与电压水平无关的一些一致的模式;（c）其他参数，例如支路电阻、MVA额定值、输电线路长度等，表现出对电压电平的强烈依赖性，其可以由具有不同功率常数的功率函数来近似。研究结果将有助于综合电网测试用例的创建和现有电网模型的验证。
英文摘要：
Transformers and transmission lines are critical components of a grid network. This paper analyzes the statistical properties of the electrical parameters of transmission branches and especially examines their interdependence on the voltage levels. Some interesting findings include: (a) with appropriate conversion of MVA rating, a transformers per unit reactance exhibits consistent statistical pattern independent of voltage levels and capacity; (b) the distributed reactance (ohms/km) of transmission lines also has some consistent patterns regardless of voltage levels; (c) other parameters such as the branch resistance, the MVA ratings, the transmission line length, etc, manifest strong interdependence on the voltage levels which can be approximated by a power function with different power constants. The results will be useful in both creation of synthetic power grid test cases and validation of existing grid models.
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