A novel equilvalent model to analyze the influence between the parallel UHVDC and EHVAC transmission lines
A novel equilvalent model to analyze the influence between the parallel UHVDC and EHVAC transmission lines
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一种新的等效模型来分析并联特高压直流输电线路和超高压交流输电线路之间的影响
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Liu Zhi
中科院分区：
文献类型：
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作者：
Ren Shu;He Wei;Yang Fan;Cheng Jianbin;Liu Zhi
提出了一种新的分析特高压直流输电线路与特高压交流输电线路并联影响的等值模型。在该模型中，首先计算输电线路和接地线路之间的分布电容，然后得到等值电路。计算了交流输电线路对直流输电线路的感应电压。通过将文[1]中的结果与本文的结果进行比较，证实了本文模型的准确性。对不同的交流导线布置和不同的交、直流输电线路间距下的直流输电线路感应电压进行了计算，结果表明，紧凑型交流输电线路可以降低直流输电线路上的感应电压，当交流输电线路和直流输电线路之间的距离为40m时，直流输电线路上的感应电压从23.9KV降到17.3KV。当交流和直流输电线路之间的距离超过140m时，感应电压接近于零。
A novel equivalent model to analyze the influence between the parallel UHVDC and EHVAC transmission lines is presented in the paper. In the model, the distributed capacitance between the transmission lines and the grounding lines is calculated firstly, then the equivalent circuit can be obtained. The induced voltage on the DC transmission lines caused by the AC transmission lines is calculated. The accuracy of the model in the paper is confirmed by comparing the result in [1] and result obtained in this paper. Calculation for the induced voltage on the DC transmission lines for different arrangement of the AC conductors and different distance between the AC and DC transmission lines were carried out, results indicate that the compact AC transmission lines can decrease the induced voltage on the DC transmission line, for which the inducted voltage decreases from 23.9kV to 17.3kV when the distance between the AC transmission lines and DC transmission lines is 40m. When the distance between the AC and DC transmission lines is beyond 140m, the induced voltage is near to zero.