由于阻抗法易受过渡电阻、互感器误差、线路结构不对称等因素的影响，所以测距精度不高。
Because the impedance fault location method is easily influenced by the factor such as fault resistance, transformer error and asymmetrical line configuration, the fault location accuracy is lower.
本文就高压输电线路故障，提出了一种基于实时对称分量法的故障测距新算法。
A new algorithm for fault location of HV transmission lines based on the real-time symmetric component method is proposed.
四相架空输电线路对称性好，线路及杆塔结构简单，在多相输电线路中具有独特的优势。
Because four-phase transmission system has the advantages of good symmetry and simple structure of its lines and poles, it has obvious superiority over other multi-phase power transmission system.
结果表明了PWM-FCL不但可以快速有效地限制住短路电流，并且在系统发生三相不对称故障时，可以保证故障线路非故障相以及非故障线路的正常运行。
The obtained results show that the PWM-FCL can limit the fault current quickly, and the unfaulted phase(s) and unfaulted line(s) will keep stable operation state when an asymmetry fault occurs.
水平地基的变形大致对称于线路中心线，斜坡地基的变形集中在下坡一侧边坡下；
The deformation of level foundation is generally symmetric of road central line and the deformation of slope foundation is mainly concentrated on the border side of the declivity.
产品类型POTS分离器。系统的应用，非对称数字用户线路。
Product type POTS splitter. System application asymmetric digital subscriber line.
研究了一种利用对称缓和曲线生成电力线路巡检飞行机器人平滑轨迹的方法。
A method to generate a continuous smooth path for flying robot for overhead powerline inspection(FROPI) is suggested.
为了减少电力系统正常运行时电流和电压的不对称性，原则上高压架空线路应采用换位措施。
In order to decrease the asymmetry of current and voltage of the power system, the high voltage transmission lines should be transposed in principle.
四相架空输电线路对称性好，线路及杆塔结构简单，在多相输电线路中具有独特的优势。
Four-phase overhead transmission lines have special advantages in high phase order transmission lines, because of the good symmetry and the simple structure of its lines and poles.
计算分析结果表明，该方法能够有效抑制由线路参数不对称产生的负序电流和电压。
The results from calculation and simulation show that the proposed method can effectively restrain the negative sequence voltage and current caused by unbalanced parameters of transmission line.
在铁路线路三维场景中，存在着大量的对称物，如树木、亭子、栏杆等，大部分对称物都属于复杂地物。
There are a lot of symmetry objects in the railway 3d sight, such as tree, georgette, and balustrade and so on.
针对电力系统中平行线路的跨线故障，提出一种融合对称分量法与相分量法的大规模电力系统跨线故障计算方法。
In this paper, a method of large scale power system transient Stability evaluation by system decomposition -aggregation and transient energy function method is presented.
针对电力系统中平行线路的跨线故障，提出一种融合对称分量法与相分量法的大规模电力系统跨线故障计算方法。
In this paper, a method of large scale power system transient Stability evaluation by system decomposition -aggregation and transient energy function method is presented.
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