• 恰当处理发电机失步振荡机网协调重要问题

    Appropriately control of generator out-of-step oscillation is an important issue of generator-network harmonization.

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  • 解列装置电力系统中的布点进行详细阐述;

    Then, it has a detail introduction for distribute location of out-of-step splitting in power system.

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  • 因此作为失步保护后备电压保护应具有反时限特性

    Thus, low voltage protection devices, served as lock-out protection reserve will also have characters uf inverse time-lag.

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  • 密钥滚动、建立失步修正等方面作了尝试性的工作。

    This paper also introduces the rolling cipher, frame synchronous, correct frame asynchronous.

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  • 同时该方法克服了外同起动过程中易产生振荡失步现象。

    The hunting and outofstep are conquered in the process of start.

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  • 实现电动机高精度运行,又解决了电动机问题。

    Motor running high-precisely and avoiding loss of synchronism are both realized.

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  • 电火花切割加工中,电动机失步产生误差,直接影响加工精度

    During the protess of elecrospark wireelectrode cutting, step motor makes mistakes because of outof synchronism, which will affect accuracy of process directly.

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  • 基于振荡中心漂移研究给出了判断中心能否落到机组内部判据

    Based on the study of the movement of oscillation center, a criterion of determining whether the center of out-of-step will lies in the interior of the generator is proposed.

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  • 文中介绍了采用静态特性限制整定原则计算方法调试方法

    The paper introduced setting principle, calculation and testing method for the low exciting limit unit using the static out of step characteristic circle.

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  • 文中介绍了采用静态失步圆特性限制整定原则计算方法调试方法

    The paper introduced setting principle, calculation and testing method for the low exciting limit unit...

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  • 结果作为判断电力系统电动机临界临界电压度的依据

    The calculation results can be taken as the judging basis for the abundance of motor critical instability and critical voltage instability in power system.

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  • 一种电机控制装置通过廉价配置可以检测进电机负载有效防止

    A control device for step motor, through low cost configuration can make the electric testing for the load of step motor and prevent braking step effectively.

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  • 每个间距行程中,进电机必须有升降速过程,这样可以防止堵转、提高效率

    There is an acceleration and a deceleration each movement between two tube columns to prevent step loss and to improve efficiency.

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  • 为避免电动机运行情况,提出了一种基于电动机角测量的新的失步保护方案。

    This paper analyzes how the non - probe exciter of synchro motor works and functions on the basis of the no.

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  • 解列作为保证电力系统安全运行重要措施保证整个电网不致完全崩溃的最后一道防线。

    Out-of-step splitting which is an important measure to assure safe running of power system, is the last line of defence to assure the whole power network not to collapse completely.

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  • 通过电力系统运行状态分析提出了利用振荡中心电压的变化特征来判断系统失步解列装置

    Through analysis of the out of step operation of power systems, a new out of step splitting device is proposed.

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  • 找出不同轨迹间的平滑切换解决了切换时电动机失步问题,提高了系统转速调节动态性能

    Furthermore, different polygonal flux linkage locus's fluent switching point is also found, which overcomes the motor 'switching failure and improves the speed adjusting dynamic performance.

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  • 人们可以发现他们期望生活方式突然新的社会地位他们发觉自己英寸,发生法国

    People can find that their expectations and ways of living are suddenly out of step with the new social position they find themselves in. This is happening in France today.

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  • 它能滑极之前准确预测,并具有构成简单适应性特点因此易于实现失步保护一种实用方法

    The criterion possesses the features of simple configuration and excellent adaptability. Because of its easy implementation it is a practicable method for out-of-step protection.

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  • 理论分析计算结果表明,此方案可以有效降低sdl平均持续时间改善了sdl帧同系统的性能

    The theoretic analysis and computation results show it greatly decrease the mean time of frame loss and amend the performances of SDL frame synchronizer.

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  • 一定控制脉冲频率下电动机可能出现振荡现象,严重影响进电动机运行严格防止这种情况发生

    When stepping motor works in some pulse frequency, it may have the problem of oscillation and miss of synchronization, so it should be avoided at full steam.

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  • 针对传统大型发电机预测保护存在的问题,并根据不同预测原理实际应用中的优缺点,提出了一种综合保护方案

    This paper presents a comprehensive method based on different conditions after disturbance to avoid the problems caused by the traditional prediction for out- of- step protection.

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  • 启动频率较高时,启动时会造成停止时由于惯性作用会发生过冲,所以电机控制必须采取升降控制措施

    When the startup speed is higher, stepping motor will lose steps. While stopping, it will also lose steps because of inertia. So, it needs to take speed control measures on control of stepping motor.

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  • 针对永磁同电动机他控式变频调速运行方式失步效率问题,通过功角特性稳定性分析,提出种功角闭环控制策略详细阐述了控制策略理论依据

    In view of this problem, under the analysis of power-angle characteristics and stability, a power-angle closed-loop control strategy was proposed and its theoretical basis was presented in detail.

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  • 奎尼匹埃克大学的另一位民意调查员彼德.布朗美国民众认为伊拉克战争得不偿补充说他们只是下一如何走有分歧

    Quinnipiac pollster Peter Brown says Americans have concluded the Iraq war was not worth the cost, but he adds that they remain divided on what to do next.

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  • 万无一训练呢?

    What are the three steps of foolproof coaching?

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  • 时间规划重力过多不前,过少则飘然

    Time management is like gravity. Too much of it, and we're stuck in place.

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  • 随着舰船摇摆频率幅度增大估计精度进一得到提高

    As the frequency and range of sway increase, the estimation accuracy of misalignment angles will be further improved.

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  • 然后根据估算投影面积可以进一近似测量能眩光

    Then based on the estimated projected area, we may further the approximate survey luminous intensity and the value of disable glare.

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  • 碱法造纸黑液主要原料经过合成工艺制备钻井泥浆降滤剂。

    The filtrate loss controller for drilling fluid is prepared by one step method using alkaline paper making black liquor as main raw material.

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