Fault Diagnosis of Broken Rotor Bars Based on the Steady-state Stator Current 基于稳态定子电流的感应电机转子断条故障诊断
Calculation of the loop closing steady-state current in radial power distribution network 辐射型配电网合环稳态电流计算方法研究
Unified fixed point coordinate transformation ( UFP-CT), and a novel zero steady-state error current control method for active power filter ( APF) based on UFP-CT were proposed. 提出一种统一定点坐标变换和基于该变换的有源电力滤波器零稳态误差电流控制方法。
The AC steady-state circulation current can be suppressed by regulatingreference voltage amplitude according to average circulation current in half line cycle. 利用半个工频周期环流电流的平均值来修正参考电压幅值,用以抑制交流静态环流;
This paper describes the steady-state current responses of the amperometric enzyme electrodes operating with electron-transfer mediators. 描述电子传递体参与工作时电流法酶电极的稳态响应特性。
This article analyzes the fault characteristics of small current neutral grounding systems. The authors present "Residual Current Method" which is based on Fourier algorithm to calculate steady-state zero sequence current. 分析了小电流接地系统的故障特征,以基于傅立叶算法的稳态零序电流为依据提出根据消弧线圈调整前后之残流变化量实现单相接地故障选线的方法。
At the same time, the PI controllers using stationary-frame generalized integrator are adopted to realize zero steady-state error for current tracking. 同时将广义积分应用于电流控制策略中,实现了电流跟踪零稳态误差的目标;
The effects of Co_3O_4 on the catalytic activity and ohmic drop of RuO_2-TiO_2 ( 60)/ Ti anode for chlorine evolution were studied by steady-state galvanostatic method and current interruption technique, etc. 用稳态恒电流法和断电流技术研究了Co3O4对RuO2-TiO2(60)/Ti阳极析氯催化活性和欧姆降的影响。
Conventional electromagnetic current transformers ( CT) possess high accuracy of steady-state electrical current measurement, but produce problems caused by magnetic saturation. 传统电磁式CT具有较高稳态电流测量精度,但存在饱和问题;
The authors also discuss, in the light of the similarity between the electrostatic field and the steady-state current field, the realization of the first approach including the integral equation, division of moment method, singularity treatment and establishment of algebraic equations after division. 应用静电场和恒定电流场的相似性,论述了第1种方法的实现过程,包括积分方程的建立,矩量法离散,奇点的处理,以及离散后的代数方程式等。
Amperometric Enzyme Electrodes: Steady-state Current Responses and Design of Enzyme Membranes 电流法酶电极:稳态响应特性与酶膜设计
Simulation results for one practical line are coincident with the results by EMTP, which shows that the new twice-modal transformation method provides an alternative approach to calculate the steady-state values of the secondary arc current and the recovery voltage. 对某实际线路进行了计算,其结果与EMTP计算结果一致,表明此方法为进行潜供电流和恢复电压稳态计算提供了另一种途径和选择。
Correspondingly, the steady-state H_2 permeation flux increases steeply with the increase of polarizing current either cathodic or anodic polarization. 氢渗透测量表明:不论阳极极化或阴极极化,随着电流增大,饱和氢渗透量明显增加,极化对da/dt和氢渗透通量的影响相似。
The steady-state phase selection elements formed by the zero-sequence current I_0 and negative-sequence current I_ ( 2A) can be used to select phase exactly; 0和负序电流(?)(2A)构成的稳态量选相元件能正确选相;
Because a complicated power system is composed of many simple branches and the operation region of a large-scale power system is composed of the intersection of the steady-state operational characteristics of each simple alternating current circuit. 由于一个复杂电力系统是由许多简单支路组成的,大型电力系统的运行域是由各简单交流电路的稳态运行特性的交集所构成。
The Transient Reversible Diffusion Equation At Microdisk Electrodes& ⅱ Steady-state Current FOR Reversible Electrode Reaction with Coupled First-order Homogeneous Chemical Reactions 微圆盘电极上暂态可逆扩散方程&Ⅱ.耦合一级均相化学反应的可逆电极反应的稳态电流
As the loop closing operation will generate steady-state current and impulse current, that if the current is too large may has a bad effect on power system security. 由于合环操作时对系统将会产生稳态电流及冲击电流,如果电流过大有可能会影响到系统的安全。
It is clear that, the grid side of converter operates at unity or maximum power factor in the start and steady-state stage, dc current was also distributed dynamically. 通过分析给出了控制框图,在电解整流装置的启动和稳态阶段,动态的分配直流侧电流的同时,都可以使网侧以单位功率因数或最大功率因数运行。
With the aim of controlling the air gap magnetic field, when the load changes, the steady-state model control the stator current to maintain the excitation current approximate stable to make sure the relationship between the rotor current and the load is linear. 前者以控制气隙磁场为目的,当负载变化时,通过控制定子电流来近似控制励磁电流恒定,以满足转子电流与负载的线性关系。
This paper adopts the MATLAB software to conduct FFT spectral analysis of the actual collected appliance steady-state current waveforms. ( 3) The key technology of the transient current characteristics of appliances were studied, mainly on the high-speed acquisition and cache technology. 文中采用MATLAB软件对实际采集的家电稳态电流波形进行了FFT谱分析。(3)对家电瞬态电流特性关键技术进行了重点研究,主要研究了高速采集及缓存技术。
Detailed and quasi steady-state models of FHD simulation are discussed, and over-excitation limiter, armature current limiter and synthetic load are modeled. 论述了FHD仿真的详细模型和准稳态模型,并对励磁、电枢电流限制器和综合负荷进行了建模。
However, two conflicting issues exist in the traditional MPPT control method, they are the tracking speed and steady-state performance, therefore current research focuses on how to adjust the step size to balance these issues. 而传统的MPPT控制方法中存在两个相互矛盾的问题:跟踪速度和稳态性能,所以目前的研究主要集中在如何调整步长来平衡这两个问题。
Finally, we get the power frequency steady-state components and operating characteristics in inverter circuit output current, provides a new theoretical basis for design, manufacture, study of control method. 最后,得到了逆变电路输出电流的工频稳态分量及运行特性,为变流装置的设计、制造、控制方法研究提供了新的理论依据。
In order to reduce steady-state error and improve output waveform, indirect control of current with closed loop is employed. This strategy actually is controlling amplitude and phase of output voltage to control var current. 为减小稳态误差和改善输出波形,文章采用电流间接闭环控制策略,通过调节主电路逆变器输出电压幅值和相位来间接控制无功电流。
To solve the problem of the command cannot pass zero, a virtual 2-dimensional UFP-CT is presented, and a zero steady-state error current control method based on virtual 2-dimensional UFP-CT is proposed to apply to single-input single-output systems. 本文探讨了一维UFP-CT的形式,针对其指令无法过零的问题,提出一种虚拟二维UFP-CT,并以此为基础设计了适用于单输入输出系统的零稳态误差电流控制方法。
In addition, as steady-state accuracy and current ripple of dynamic shim amplifier is very demanding, this thesis uses noise analysis method to analyze the feedback circuit and designs output filter for the power stage, in order to achieve performance requirements. 另外,由于动态匀场放大器对稳态精度和纹波要求非常苛刻,本论文还采用噪声分析的方法对反馈电路进行分析设计,并为功率级输出设计滤波器,以便达到性能的要求。
An advantage of this technology is that the SECM measurements are carried out under steady-state conditions, so that the complication caused by ohmic potential drop and charging current can be overcome, therefore, the reliability of the data was strengthened. SECM的优势是在稳态条件下测量,可以克服双电层电流和电势降,从而提高测定数据的准确性和可靠性。
And a number of detailed analysis for the key issues of those protection methods were analyzed, such as the current rate, the maximum short circuit current, time constant, steady-state short-circuit current ext. 文中针对以上几种保护方式的若干关键问题进行了详细分析,如电流变化率、最大短路电流、供电回路时间常数、稳态短路电流等。
The closed-loop operation is an effective way to solve the problem when the equipment was repaired and the load was transferred in the distribution networks. However, the generated large closed-loop steady-state current would cause over-current protection movement, which would directly affect the power grid safety. 配电网络合环操作是解决配电网进行设备检修时需要进行负荷转移问题的有效方式,但由此产生的过大合环稳态电流会引起过流保护动作,直接影响电网的安全运行。