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weak damping    
相关语句
  弱阻尼
    5. The effect of weak damping second-order element should be considered as the influence of small parameters on feedback control system is taken into account. The high-speed performance of system will be effected under the influence of correction of low-pass filter.
    5.讨论小参数对反馈系统的影响时,需要注意弱阻尼二阶环节的作用,用低通滤波进行校正将会影响系统的快速性。
短句来源
    Analysis show that these oscillations was caused by the inherent weak damping oscillation mode existing in the system, and the LFO was induced by the negative damping torque supplied by the speed governor of No. 2 unit of the China Second Truck Factory, and can not be damped.
    分析结果证明了这些低频振荡是电网本身固有的弱阻尼低频振荡模式决定的,而维持低频振荡的直接原因是第二汽车制造厂自备电厂2号机组调速系统参与了低频振荡,它提供的负阻尼转矩使得固有的弱阻尼低频振荡模式被激发起来之后无法衰减。
短句来源
    Here, the general situation of South China power grid is introduced and the main problems in this grid such as weak damping and inadequate dynamic voltage supporting ability, etc.
    本文介绍了电网概况,分析了电网运行中存在的弱阻尼、动态电压支撑能力不足等主要问题。
短句来源
    A robust controller for STATCOMs (static synchronous compensators) installed on long connection lines was developed to damp inter-area oscillations and maintain steady voltages to reduce weak damping in interconnected power systems.
    针对互联电力系统的弱阻尼问题,该文为装设在区域间联络线上的静止同步无功补偿器(STATCOM)提出了以阻尼区域间振荡为目标并保证电压稳态精度的鲁棒控制设计方法。
短句来源
    The results showed that the low frequency oscillation with weak damping was existed in Jilin Province Grid. In view of the above,inputting PSS during operation by 100 MW and above fossil generators in local area and measuring the practical excitation system parameter were proposed.
    结果表明吉林省电网存在区域内的弱阻尼低频振荡,据此建议省内100 MW及以上火电机组运行时投入PSS,同时实际测试励磁参数。
短句来源
  弱阻尼
    5. The effect of weak damping second-order element should be considered as the influence of small parameters on feedback control system is taken into account. The high-speed performance of system will be effected under the influence of correction of low-pass filter.
    5.讨论小参数对反馈系统的影响时,需要注意弱阻尼二阶环节的作用,用低通滤波进行校正将会影响系统的快速性。
短句来源
    Analysis show that these oscillations was caused by the inherent weak damping oscillation mode existing in the system, and the LFO was induced by the negative damping torque supplied by the speed governor of No. 2 unit of the China Second Truck Factory, and can not be damped.
    分析结果证明了这些低频振荡是电网本身固有的弱阻尼低频振荡模式决定的,而维持低频振荡的直接原因是第二汽车制造厂自备电厂2号机组调速系统参与了低频振荡,它提供的负阻尼转矩使得固有的弱阻尼低频振荡模式被激发起来之后无法衰减。
短句来源
    Here, the general situation of South China power grid is introduced and the main problems in this grid such as weak damping and inadequate dynamic voltage supporting ability, etc.
    本文介绍了电网概况,分析了电网运行中存在的弱阻尼、动态电压支撑能力不足等主要问题。
短句来源
    A robust controller for STATCOMs (static synchronous compensators) installed on long connection lines was developed to damp inter-area oscillations and maintain steady voltages to reduce weak damping in interconnected power systems.
    针对互联电力系统的弱阻尼问题,该文为装设在区域间联络线上的静止同步无功补偿器(STATCOM)提出了以阻尼区域间振荡为目标并保证电压稳态精度的鲁棒控制设计方法。
短句来源
    The results showed that the low frequency oscillation with weak damping was existed in Jilin Province Grid. In view of the above,inputting PSS during operation by 100 MW and above fossil generators in local area and measuring the practical excitation system parameter were proposed.
    结果表明吉林省电网存在区域内的弱阻尼低频振荡,据此建议省内100 MW及以上火电机组运行时投入PSS,同时实际测试励磁参数。
短句来源
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  weak damping
Moreover the damping is assumed to be nonlinear with no growth assumption at the origin, which allows very weak damping.
      
For nor linear inertial torsion vibrations of the structure of a nematic liquid crystal in a destabilizing magnetic field, there exist low-frequency modes with anomalously weak damping.
      
When the piston velocity is always smaller than the thermal velocity we observe weak damping.
      
We investigate the microscopic mechanisms associated with strong and weak damping in the adiabatic motion of the simple piston with finite mass and finite amount of gas.
      
Strong and Weak Damping in the Adiabatic Motion of the Simple Piston
      
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The problem of building up a high-speed servomechanical system in engineering practice have been discussed. The main points are: 1. A Small inertial electronic circuit has been developed instead of the large inertial filter circuit and power element. 2. Tachometer has been used to improve performance of servomotor. The key of this work lies on designing a satisfactory power element and avoiding the spring connection of machines. 3. The method of combining the machine and electronic circuits has been proposed...

The problem of building up a high-speed servomechanical system in engineering practice have been discussed. The main points are: 1. A Small inertial electronic circuit has been developed instead of the large inertial filter circuit and power element. 2. Tachometer has been used to improve performance of servomotor. The key of this work lies on designing a satisfactory power element and avoiding the spring connection of machines. 3. The method of combining the machine and electronic circuits has been proposed to the damping of transmission effectively. 4. By using the analytic method introduced in this paper, the specification of optimal high-speed system can be nearly realized by dynamic design. This method is simplier and easier than other general synthetic methods for handling by technicians. 5. The effect of weak damping second-order element should be considered as the influence of small parameters on feedback control system is taken into account. The high-speed performance of system will be effected under the influence of correction of low-pass filter.

本文着重讨论建造快速伺服系统工程实践中的问题。其主要之点有: 1.必须研制小惯性电子线路以取代惯性较大的平滑滤波电路及功率部件等。 2.采用测速反馈改善伺服电机性能的关键在于设计理想的功率部件和避免机组的弹性联接。 3.采用机械与电子线路相结合的方法,可以有效地的增加动力传递机构的阻尼。 4.利用本文介绍的分析方法进行动态设计,可使系统接近最优快速系统的指标。方法简便,比之一般的综合方法易为工程技术人员掌握。 5.讨论小参数对反馈系统的影响时,需要注意弱阻尼二阶环节的作用,用低通滤波进行校正将会影响系统的快速性。

Wide range low frequency oscillations (LFO) have occurred in Central China Power System several times. Analysis show that these oscillations was caused by the inherent weak damping oscillation mode existing in the system, and the LFO was induced by the negative damping torque supplied by the speed governor of No. 2 unit of the China Second Truck Factory, and can not be damped.

本文综合分析了第二汽车制造厂自各电厂2号机组多次引起的华中电网大面积低频功率振荡现象。分析结果证明了这些低频振荡是电网本身固有的弱阻尼低频振荡模式决定的,而维持低频振荡的直接原因是第二汽车制造厂自备电厂2号机组调速系统参与了低频振荡,它提供的负阻尼转矩使得固有的弱阻尼低频振荡模式被激发起来之后无法衰减。

The South China power grid is the first long-distance and huge capacity power grid with AC and DC power networks in parallel in China. Here, the general situation of South China power grid is introduced and the main problems in this grid such as weak damping and inadequate dynamic voltage supporting ability, etc., are analyzed. On the basis of analyzing the related technological strategy existing in South China power grid, the ways and the measures to solve these problems are researched and the prospect...

The South China power grid is the first long-distance and huge capacity power grid with AC and DC power networks in parallel in China. Here, the general situation of South China power grid is introduced and the main problems in this grid such as weak damping and inadequate dynamic voltage supporting ability, etc., are analyzed. On the basis of analyzing the related technological strategy existing in South China power grid, the ways and the measures to solve these problems are researched and the prospect of future works are given.

南方电网是中国首个长距离大容量送电的交直流并联运行电网。本文介绍了电网概况,分析了电网运行中存在的弱阻尼、动态电压支撑能力不足等主要问题。 在分析电网现有相关技术策略的基础上,探讨了解决这些问题的方法和手段,并对将来的工作进行了展望。

 
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