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Research on Frequency Characteristics of the Overhead Line Parameters

机译：架空线参数的频率特性研究

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Having been learned a lot from the previous work , this paper proposed a new medium-frequency current ice-melting method employing skin effect and proximity effect phenomena to overcome the weaknesses of existing de-icing method of overhead line. By the interaction of the two phenomenon, the transmission line unit resistance is expected to increase, compared with the working frequency current, the intermediate frequency current with the same ice-melting power can be reduced effectively to protect the conductor. First, this paper set up a simplified ACSR model according to the Principle of Equivalence Area, and then the calculation of frequency characteristics of three types of transmission line's resistance and inductance is undertook based on the model mentioned above and Finite Element Technique (FET).The result indicates that the unit resistance is increasing significantly when injected 400+HZ current. Similarly, the other type of ASCR has the same performance; however, the resistance of conductor with more layers is changing rapidly than the other conductors. All types of the ASCR have their inductance decreasing at the initial stage, then increase at certain point. By defined theory analysis, this paper proposed an intermediate frequency (1600 HZ) ice-melting method, the increase of the unit resistance and the choice of frequency is within the ideal extent. The proposed ice-melting method appears promising, and it needs further experimental practice.
机译：从前人的工作中学到很多，提出了一种利用趋肤效应和邻近效应现象的中频电流融冰方法，克服了架空线除冰方法的不足。通过这两种现象的相互作用，预计传输线单元电阻会增加，与工作频率电流相比，可以有效降低具有相同融冰能力的中频电流，从而保护导体。首先，根据等效面积原理建立了简化的ACSR模型，然后在上述模型和有限元技术的基础上，对三种传输线的电阻和电感的频率特性进行了计算。结果表明，注入400 + HZ电流时，单位电阻显着增加。同样，其他类型的ASCR具有相同的性能。但是，多层导体的电阻比其他导体变化快。所有类型的ASCR的电感都在初始阶段减小，然后在特定点增大。通过理论分析，提出了一种中频（1600 HZ）融冰方法，单位电阻的增大和频率的选择均在理想的范围内。拟议的融冰方法似乎很有希望，还需要进一步的实验实践。

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