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power flow     
相关语句
  潮流
     Research on FACTS Based Optimal Power Flow Control in the Market Environment
     电力市场下基于FACTS的优化潮流控制研究
短句来源
     The Research on Intelligent Control Method of Unified Power Flow Controller
     统一潮流控制器的智能控制方法研究
短句来源
     The Studies of Physical Model of Unified Power Flow Controller
     统一潮流控制器物理模型研究
短句来源
     Optimal Power Flow and Optimal Reactive Power Compensation by Newton's Method
     牛顿法最优潮流与最优无功补偿
短句来源
     Parallel Fast Decoupled Power Flow ──Application of Householder's Formula
     快速分解潮流的并行算法──Householder公式的应用
短句来源
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  功率流
     Research on Power Flow Analysis and Design of RV Reducer
     RV减速器的功率流分析和设计研究
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     A Study on Power Flow and Meshing Efficiency of 3K Type Planetary Gear Train
     3K行星轮系的功率流与啮合效率研究
短句来源
     According to the analysis of the power flow model of this transmission,the efficiency of this transmission is higher than that of the cascade system in vehicle.
     经对该变速系统的功率流模型的分析可知,基于无级变速系统的功率流数学模型的效率比常规级联式车用电传动系统高。
短句来源
     Measurement of Vibration Power Flow in Beam with PVDF Sensors
     用PVDF传感器测量梁的振动功率流
短句来源
     The coupled longitudinal-flexural wave motion and the power flow of a curved free beamassumed to be approximately of an infinite length due to vibration in the plane are studied.
     针对近似为无限长的自由曲梁在平面内的振动,研究了其中纵弯耦合波运动及功率流,得到了由激励输入曲梁的功率流及由内力作用传播的功率流
短句来源
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  潮流计算
     Optimal Power Flow Computation Based on Genetic Algorithm in Network with FACTS Devices
     基于遗传算法的FACTS网络最优潮流计算
短句来源
     A ZBUS POWER FLOW CALCULATION METHOD FOR DISTRIBUTION NETWORK BASED ON NEWTON METHOD
     基于牛顿法的配电网络Zbus潮流计算方法
短句来源
     Distributed Power Flow Calculation Based on an Improved Jacobian-Free Newton-GMRES (m) Method
     基于改进Jacobian-Free Newton-GMRES(m)的电力系统分布式潮流计算
短句来源
     2) Power flow calculation for distribution network is very important to the reliability evaluation.
     2) 研究了配网可靠性潮流计算方法。 配网潮流计算是进行配网全面可靠性评估的基础。
短句来源
     This paper analyzes the important reliability conception, power flow computation, reliability computation of distribution network,sensitivity index computation of reliability.
     论文首先对一些重要的配电系统可靠性概念以及潮流计算、配网可靠性计算、可靠性指标敏感度计算等与配电网的可靠性和经济性密切相关的模型和计算方法进行了系统性的分析。
短句来源
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  功率通量
     Only one conduction loss of the power switch is present in the power flow path during the inversionperiod.
     逆变时,在功率通量回路中只有一个功率开关上有传导损耗。
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  power flow
The possibility of using a semiconductor thermal probe to investigate the power flow distribution in waveguides
      
The electric field and power flow density distributions within and outside of amplifying FBGs permit to understand electrodynamically the process of amplification in modulated media.
      
The reformulation of Helmholtz's equation in the MSE to the full set of first-order differential equations leads to dealing with the electric field amplitude, its derivative, power flow density and phase distributions in any aperiodic media.
      
The reformulation of Helmholtz's equation in the MSE to the full set of first-order differential equations leads to dealing with the electric field amplitude, its derivative, power flow density and phase distributions in any aperiodic media.
      
As an application of the method two straight waveguides are connected by a curved bend and the power flow is determined.
      
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In the present paper an attempt has been made to clarify the effect of the hand of screw thread (right- or left-hand) of the feeding screw on the distribution of power flow during forward and backward operations of a differential screwing me-chanism in rotary drills. The functional relationship between the efficiency of the drills and the speed ratio of screw pairs has also been studied.The following results have been proved analytically and graphically by the author: 1.The mechanism with right-hand screw...

In the present paper an attempt has been made to clarify the effect of the hand of screw thread (right- or left-hand) of the feeding screw on the distribution of power flow during forward and backward operations of a differential screwing me-chanism in rotary drills. The functional relationship between the efficiency of the drills and the speed ratio of screw pairs has also been studied.The following results have been proved analytically and graphically by the author: 1.The mechanism with right-hand screw during forward feeding has circulating power, whereas with left-hand screw there is none or less than that with right-hand screw.2. The mechanism with left-hand screw during backward feeding has circulating power, whereas with right- hand screw there is none or less than that with left-hand screw 3.The mechanism with right-hand screw during backward feeding or with left-hand screw during forward feeding has circulating power only when: Mpower in mechanism increases the torques on the feeding screw and the intermediate shaft, and therefore increases the size of the machine parts and the overall dimension of the drill.5.Further, its presence also greatly decreases the mechanical efficiency of the drill.In order to decrease the size of the drill and to raise its efficiency, measures should be taken as follows: 1.If the drill is to take the forward feeding only, a left-hand power screw should be used. Hence by using the efficiency equations, derived in this paper, the optimum speed ratio to get higher efficiency of the screw pairs can readily be selected.2.If the drill is to take both the forward and backward feedings,then the exis-tence of circulating power could not be avoided. In this case, according to the exter-nal loads M and P during forward and backward feedings, the thread-hand should be so selected that the circulating power will be kept to a minimum. And then, by selecting the proper speed ratio of screw pairs in the corresponding efficiency equation, a higher mechanieal efficiency could still be obtained.

本文阐明采用差动螺旋推进机构的旋转式钻机,在前进钻孔与后退扩孔时,差动螺旋的螺纹方向(左或右)对钻机功率流的影响.此外,对于丝杠螺母角速比跟钻机效率之间的关系也作了分析. 本文用分析法得出如下结果: 1.右螺纹丝杠在前进钻孔时将产生涡流功率,此时如采用左螺纹,则一般无此现象,即使有的话,也较右螺纹时的涡流功率小得多. 2.左螺纹丝杠在后退扩孔时将产生涡流功率,此时如采用右螺纹,则一般无此现象,即使有的话,也较左螺纹时的涡流功率小得多. 3.右螺纹丝杠,后退扩孔或左螺纹丝杠前进钻孔时,出现涡流功率的条件是 M

本文阐明采用差动螺旋推进机构的旋转式钻机,在前进钻孔与后退扩孔时,差动螺旋的螺纹方向(左或右)对钻机功率流的影响.此外,对于丝杠螺母角速比跟钻机效率之间的关系也作了分析. 本文用分析法得出如下结果: 1.右螺纹丝杠在前进钻孔时将产生涡流功率,此时如采用左螺纹,则一般无此现象,即使有的话,也较右螺纹时的涡流功率小得多. 2.左螺纹丝杠在后退扩孔时将产生涡流功率,此时如采用右螺纹,则一般无此现象,即使有的话,也较左螺纹时的涡流功率小得多. 3.右螺纹丝杠,后退扩孔或左螺纹丝杠前进钻孔时,出现涡流功率的条件是 M

In this paper the power-flow relations between the mixed waves in optical frequency range are derived for the dispersive media from the Maxwell's equations. Thus, the Manley-Rowe relationships in the theory of parametpic amplifiers are extended to the optical frequency range.The process to generate third harmonic by twice using the second nonlinear effect is studied here. And it is shown from the results of counting that under certain condition of phase matching (|k_2-2k_1|

In this paper the power-flow relations between the mixed waves in optical frequency range are derived for the dispersive media from the Maxwell's equations. Thus, the Manley-Rowe relationships in the theory of parametpic amplifiers are extended to the optical frequency range.The process to generate third harmonic by twice using the second nonlinear effect is studied here. And it is shown from the results of counting that under certain condition of phase matching (|k_2-2k_1|

由Maxwell方程组求得了非线性色散介质中产生的光频混频波功率之間的关系,将参量放大的Manley-Rowe关系式推广到光频波段。本文还討论了由二次二級非綫性效应产生三次諧波的过程,計算結果表明,在一定的位相匹配条件下(|k_2-2k_1|

In this paper, test results on dynamic models of static var compensators as chief means to control the node-voltages and reactive power flows in power systems are described. Particularly, the characteristics of node-voltages versus reactive power flows is analyzed, then followed by an application of this characteristics to the problem of automatic voltage control of power systems, and finally general conclusions about the actions of the excitation control regulator of static var compensator...

In this paper, test results on dynamic models of static var compensators as chief means to control the node-voltages and reactive power flows in power systems are described. Particularly, the characteristics of node-voltages versus reactive power flows is analyzed, then followed by an application of this characteristics to the problem of automatic voltage control of power systems, and finally general conclusions about the actions of the excitation control regulator of static var compensator on the automatic voltage control of node points in power systems are given. According to this idea, electric power systems are possible to be designed.

文中概述了利用静止无功补偿器作为电力系统无功补偿及电压控制的主要手段在动态模型上的试验研究结果。着重分析了电力系统的电压-无功功率特性,并将电力系统的这一特性应用于自动调节系统的分析中,从而得出关于静止补偿器励磁调节器在电力系统中自动调压作用的一般概念,为工程设计提供依据。

 
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