This paper compares and analyses various types of main fault location algorithms and puts forward a new fault location algorithm for double transmission lines on a same tower.

比较分析了各种主要的测距算法，并在此基础上提出了一种同杆并架双回线的故障测距新算法。

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Main functions and characteristic for zero sequence current protection setting program are presented in this paper. Ways of no_balance zero sequence current for double lines are introduced.

主要介绍了零序电流保护整定计算程序的主要功能和特点，简要介绍了双回线零序电流的不平衡解决方法。

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This paper introduces the main processes about typical structure, welding sequence, lines fairing and quality control etc. for the conversion from single-hulled tanker to double-hulled tanker.

本文主要介绍了油轮单壳改造为双壳的典型结构、焊接顺序、线型光顺、质量控制等方面的主要工艺流程。

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