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first swing
相关语句
  第一摆
     Power system signal is divided according to time. Physical character of power system dynamic variable is the basis of it. First swing error, frequency comparability, damp comparability and energy error are purposed as error index.
     论文详细分析了电力系统动态变量的特点,提出以prony算法作为电力系统动态变量特征提取工具,按照分时原则将信号分时,并针对各个时段的特点提出第一摆误差、频率相似度、阻尼相似度、误差能量比等仿真误差计算指标。
短句来源
     ? Transient stability control of thyristor controlled series compensator (TCSC) is a multi objective control problem since we need to keep back the first swing of power angle, and to damp the power swings after the faults rapidly.
     可控串补暂态稳定控制,既要抑制功角第一摆,又要快速阻尼系统故障后的功率振荡,这是一个多目标控制问题。
短句来源
  第一摇摆
     The valve control,the system dumping resistor control and excitation control is coordinated effectively. In the first swing after short circuit fault,the system dum ping resistor be used together with the fuzzy valve control and excitation control,the amplitude of the first swing can be restrained;
     在发生短路故障后的第一摇摆过程中,加入制动电阻控制来辅助模糊变结构汽门控制及励磁控制,可以有效地抑制第一摇摆的幅值,在以后的振荡过程中,只依靠模糊汽门控制及模糊附加励磁控制来控制系统;
短句来源
  首次摆动
     Through many iterations, the dynamic and " First swing" transient stability limit are found, the late is compared with the results obtained by transient torque-angle characteristic and equal area criteria.
     经过多次迭代,分别得到了动态稳定极限和“首次摆动”瞬态稳定极限,并与由瞬态功角特性和等面积法则得到的瞬态稳定极限进行了比较。
短句来源
  “first swing”译为未确定词的双语例句
     Finally, this paper prospects the study's future of the transient stability, points out that the present energy function method only fits for the first swing transient stability analysis. With the energy function method's deep study, the energy function method for the fast transient stability has good on-line application future.
     本文总结了国内外有关能量函数法和求取主导不稳定平衡点的BCU法(the Boundary of Stability Region based Controlling Unstable Equilibrium Point Method)的研
短句来源
     The main view set forth in this paper is that the generator representation using E'_q model (constant quadrature axis voltage behind transient reactance) instead of classical E' model (constant internal voltage behind transient reactance) can be modeled more realistically for first swing stability analysis.
     主要论点是发电机用E_q′模型代替经典的E′模型,它对于首次摇摆稳定分析更为实用。
短句来源
     he extended equal area criterion ( EEAC)has been extended to the cases with multiple operations,in which both first swing and second swing stable problem can be resolved.
     本文首先对扩展等面积法(EEAC)进行了推广研究,使之能处理多重操作时的第一、第二摇摆问题,以适应实际应用之需。
短句来源
     This is an important improvement to DEEAC whereonly first swing instability can be treated.
     这一软件在精度上大大优于动态EEAC(DEEAC),并且保持了其快速性;
短句来源
     The fast valving control system of a reheat turbogenerator is proposed in this paper, which adopts switch control in interceptor valve and optimal fault-tolerant control in governing valve and has the following superiorities: (1) The switch control of interceptor valve, which can be realized easily, can quickly respond to the system failure and ensure the transient stability of the first swing;
     提出的对中压缸阀门采用开关控制,对高压缸阀门采用最优容错控制的再热汽轮发电机快关控制系统具有以下优越性:(1)中压缸阀门采用开关控制,响应快,易实现,能有效地保证故障后第一摇摆的暂态稳定;
短句来源
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      first swing
    -Finally, the fatigue life reduction was compared to the improvement of first swing stability under the two control systems.
          
    Operations are essentially the same as for the first swing-by.
          
    Moving in closer, they first swing the flashlight in an arc to dynamically illuminate the surface at a low angle from a variety of directions.
          
    First swing stability and power oscillation damping Captive generators, frequency excursions, load shedding and braking.
          


    Because the fault cleaning time is very short due to rapid action of protective relays and circuit breakers used in present-day high voltage networks, the effect of conventional forced excitation on transient stability is not obvious. The paper describes the effect of discrete supplementary excitation control on transient stability. Excitation is applied at the instant of fault cleaning and increased continually up to the instant, at which the maximum power angle of the first swing is reached. Excessive...

    Because the fault cleaning time is very short due to rapid action of protective relays and circuit breakers used in present-day high voltage networks, the effect of conventional forced excitation on transient stability is not obvious. The paper describes the effect of discrete supplementary excitation control on transient stability. Excitation is applied at the instant of fault cleaning and increased continually up to the instant, at which the maximum power angle of the first swing is reached. Excessive terminal voltage is limited by a limiter. In the study, a dynamic model of "single machine through impedance connected to an infinite bus" was used. The data obtained in the dynamic model experiments show that the application of discrete supplementary excitation manner described above may improve the transient stability by about 10% under ordinary conditions.

    由于现代高压电网继电保护、开关动作迅速,切除短路的时间很短,一般的发电机的强 行励磁对提高电力系统暂态稳定性的效果是不明显的。文章提出,可以采用励磁附加断续控 制,在短路切除到功角到达最大值这段时间内继续增大励磁,改善暂态稳定性,而用定子电 压限止器来限止定子过电压。通过单机无穷大系统动态模型试验,取得了在多种情况下断续 控制对提高暂态稳定性的效益的数据,一般情况下提高暂态稳定极限的幅度为10%左右。

    This paper makes a brief analysis on the preparation patterns of earthquakes ( Ms=7.6,7.2 ) in Lancang of Yunnan on November 6, 1988 from the follow-ing reports:the research and prediction process of the seismic dangerous region in the South Yunnan Province,the distribution of the extremeshock area and main aftershock,the collapse directions of buildings and relavant destruction characteri-stic, the focus mechanism and first swing directions of P waves of the earthqua-kes record by Lancang station, etc....

    This paper makes a brief analysis on the preparation patterns of earthquakes ( Ms=7.6,7.2 ) in Lancang of Yunnan on November 6, 1988 from the follow-ing reports:the research and prediction process of the seismic dangerous region in the South Yunnan Province,the distribution of the extremeshock area and main aftershock,the collapse directions of buildings and relavant destruction characteri-stic, the focus mechanism and first swing directions of P waves of the earthqua-kes record by Lancang station, etc.

    本文阐述了近两年来“MSP”工程对滇南地震危险区的研究和预报过程,对澜沧7.6级地震的主余震分布、极震区分布、建筑物倒塌方向及有关破坏特点、震源机制、澜沧台单台P波初动方向等方面进行了研究,并对其蕴震型式作了简要分析。

    In this paper, a method for practical stability domain estimate of power system utilizing topological energy function (TEF) based on a structure preserving model (SPM) is presented. The main view set forth in this paper is that the generator representation using E'_q model (constant quadrature axis voltage behind transient reactance) instead of classical E' model (constant internal voltage behind transient reactance) can be modeled more realistically for first swing stability analysis.Besides the generator...

    In this paper, a method for practical stability domain estimate of power system utilizing topological energy function (TEF) based on a structure preserving model (SPM) is presented. The main view set forth in this paper is that the generator representation using E'_q model (constant quadrature axis voltage behind transient reactance) instead of classical E' model (constant internal voltage behind transient reactance) can be modeled more realistically for first swing stability analysis.Besides the generator model is treatd to accommodate one-axis E_q model, the arbitrarily voltage dependent loads are considered. It has been obtained in acerate identifying the system transient energy, especially the component due to voltage dependent active loads. The boundary of practical stability domain is determined using potential energy boundary surface (PEBS) method. The effectiveness of this method has been investigated with 16-generaton 51-bus reduced East China power system. The simulation study has been made to support the issue proposed.

    本文论述了基于网络结构保持的拓扑能量函数法评估多机系统暂态稳定域的数学模型与算法。主要论点是发电机用E_q′模型代替经典的E′模型,它对于首次摇摆稳定分析更为实用。同时在系统模型中计入了负载的电压特性,并有效地判定系统的暂态能量,运用位能边界曲面方法决定稳定域。用16机51结点简化的华东系统对上述方法的有效性进行了研究,仿真结果验证了所提论点的正确性。

     
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