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   directional unit 在 电力工业 分类中 的翻译结果: 查询用时:0.168秒
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directional unit
相关语句
  方向元件
    A study of the phase angle power directional unit
    交点相角法功率方向元件的研究
短句来源
    Turn-to-turn Faults in Stator Windings of Generator and Negative Power Directional Unit
    发电机匝间保护与负序功率方向元件
短句来源
    To prevent this maloperation,negative power directional unit can be used for judging the fault between internal and external,which is a way to prevent turn-to-turn faults protection maloperation.
    提出增加用负序功率方向元件来进行判断内外部故障,可以有效防止匝间保护误动作。
短句来源
  “directional unit”译为未确定词的双语例句
    The disadvantages of transformers backup protection are analyzed detailedly, and a new scheme for transformer backup protection based on the directional unit applying fault components is presented in this paper.
    本文详细分析了现有的变压器后备保护的不足,提出了基于纵联比较原理的变压器后备保护新方案。
短句来源
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  directional unit
For modelling the directional unit, a phase comparator or power measurement technique can be chosen.
      


A nodal phase_angle power directional unit is presnted. The unit uses a phase angle between waveform of voltage and current as criterion.The dead zone is extremely small and its circuit structure is simple.Therefore,this new power directional unit is more better than traditional one.

介绍了一种新型的交点相角法功率方向元件 ,这种新型的功率方向元件是利用电流、电压相量的波形之间的交角作为动作判断量 ,其动作死区极小 ,且构成较为简单 ,因此比传统的功率方向元件更为优越

Directional unit based protection of double-circuit line is analyzed in detail. It uses the balance between two circuits to distinguish internal faults and external faults. Directional units of the two circuits are used as the criterion. The noncommunication protection will cooperate with zone 2 of distance protection. Influence of system impedance and fault types are put forward. EMTP simulation proves the correction of the principle and analysis.

为了在平行双回线上实现利用单端电气量的全线速动保护,提出了一种基于方向元件的双回线无通道保护新原理,它通过比较双回线同端两条线路上的方向元件的输出来判断远方断路器的动作情况,从而判断是否在区内发生了故障。该无通道保护可以快速、可靠地加速距离保护二段之内的区内故障动作。文中进行了故障分析和保护原理的讨论,并验证了该保护的可行性。

Unit commitment is an important means to improve operational economic efficiency in traditional power systems and a critical market clearing tool of electricity market. Colony evolution based intelligent optimization algorithms have deficiencies of poor computational efficiency and are prone to premature during the solution process. An immune algorithm based unit commitment was presented and the aforementioned faults were chastened effectively by the inherent mechanism of keeping diversity among populations...

Unit commitment is an important means to improve operational economic efficiency in traditional power systems and a critical market clearing tool of electricity market. Colony evolution based intelligent optimization algorithms have deficiencies of poor computational efficiency and are prone to premature during the solution process. An immune algorithm based unit commitment was presented and the aforementioned faults were chastened effectively by the inherent mechanism of keeping diversity among populations and immune memory of the immune algorithm. Furthermore, several important measures were adopted to achieve better performance. Firstly, the previous constraint satisfaction technique was generalized to obtain more solutions to be explored in the feasible solution space. Secondly, a bi-directional unit decommitment procedure was developed to improve local optimization performance of the individuals. Finally, initial population was generated by the priority list method, which was suitable to reflect prior knowledge about the problem. A typical system shows that the newly developed algorithm obtains better results and faster convergence speed, requires approximately linear computational complexity when the system is scaled up, and is qualified to be a new effective algorithm for solving unit commitment problem.

机组组合是改善传统电力系统运行经济性和电力市场出清的重要手段。基于群体进化的智能优化算法在求解过程中存在计算效率低和易于早熟收敛等缺点。提出机组组合的免疫算法,利用免疫算法保持种群多样性的内在机制和免疫记忆特性改进既有的智能优化方法。新算法扩展了约束处理技术,能更好地对可行解空间搜索,采用一种由后向前、由前及后、双向迂回推进的精简程序改善个体可行解的局部最优性,同时利用优先级顺序法产生能较好反映问题先验知识的初始种群。典型算例证实新算法能获得更优的结果,具有更快的收敛速度,且在系统规模扩大时有大致线性的计算复杂性,是一种新的高效的机组组合智能优化算法。

 
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