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load power     
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  负载功率
     Wavelet Analysis of Curve of Shearer's Load Power
     采煤机负载功率曲线的小波分析
短句来源
     Wavelet transform and its application in electromotor load power analysis
     电动机负载功率的小波分析
短句来源
     The results indicate that maximum efficiency of resistive class-A amplifiers is 8.6%,the maximum load power is 0.0625Ucc~2/Rc,and the amplifier efficiency can nearly reach maximum when load power reaches maximum.
     结果表明,电阻性甲类放大器理论最高效率为8.6%,负载最大功率为0.0625U2cc/Rc,而且负载功率达到最大时放大器效率基本上也达到最高.
短句来源
     The application of wavelet in electromotor load power analysis is presented.
     给出小波变换在电动机负载功率分析中的应用方法,用小波变换对采煤机截割电动机负载功率信号进行了多分辨率分析。
短句来源
     True root mean square measurement of multi-user load power
     多用户负载功率的真有效值测量
短句来源
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  负荷功率
     Load Power Impedance Moment Method for Optimal Location of Reactive Power Compensators on 10 kV Feeder
     10kV馈线无功补偿选点的负荷功率阻抗矩方法
短句来源
     THE SCADA AND STEEL ROLLING IMPACT LOAD POWER REGULATING SYSTEM
     攀钢 SCADA 及轧钢冲击负荷功率调节系统
短句来源
     The influences of time constant in dynamic load model, load power and load constitution on transient voltage stability are also studied.
     此外,还研究了动态负荷模型时间常数、负荷功率和负荷成分对暂态电压稳定性的影响。
短句来源
     Based on Newton-raphson method in polar form and derived from complex power equation, the Jacobian matrix of the proposed method has become constant by neglecting node load power which will bring less influence in iterating process and by linearizing the real and image of PV node voltage to magnitude.
     该文基于牛顿-拉夫逊法的极坐标形式,从复功率方程出发,忽略功率方程迭代过程中影响相对较小的负荷功率,把PV节点电压的实部、虚部线性拟和为幅值,建立了完全常数项的Jacobian矩阵。
短句来源
     And then, some measures to increase the load power margin and avoid voltage collapse in AC/DC power systems are studied in this paper.
     在此基础上,研究可提高交直流联合系统负荷功率裕度、防止电压崩溃发生的交流系统措施和直流系统措施。
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  功率负荷
     The author introduced the load power of various ruthenium series resistor paste and developed R-7200 series big power resistor paste in this paper
     介绍了各种钌系电阻浆料的功率负荷能力,研制出R-7200系高功率电阻浆料。
短句来源
     For a constant power load or a motor load,since the change of OLTC has no or little influence on the load power,the voltage of primary side almost has no change whether the tap operates or not.
     而对于恒功率负荷和电动机负荷,OLTC的变化不会引起负荷功率的恢复,OLTC的变化对系统电压稳定有利;
短句来源
     The new calculating method of stationary voltage stability critical node is put forward by analyzing the ability of the load power of simple alternative circuit branch.
     通过分析简单交流支路的功率负荷能力,提出了求取静态电压稳定临界点的新算法。
短句来源
  承载功率
     It feafures one fo two class higher in load power, 5 to 10 dB(A) lower in noise, one time higher in speed ratio and higher repeat use rate than the QJ reducer.
     它的承载功率比QJ提高1~2个挡次,噪声比QJ低5~10dB(A),速比比QJ增加1倍,齿轮的重复使用率比QJ高,而且加工制造方便,不需增加成本。
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  load power
The relationship between induction case depth and load power is derived.
      
The relationship between induction case depth and load power for high frequency, high load power and short heating time
      
A principal objective of this article is to compare the results from the two techniques using a database made up of observations from the Australian Loy Yang A base-load power plant and a range of similar plants in North America.
      
Decomposing economic inefficiency in base-load power plants
      
The difficulties arise from the fact that the local oscillator power is not hugely greater than the total load power incident across the RF and IR band.
      
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Switching no-load Power line is one of the operating duties for circuit breaker.This PaPer gives statistical analysis of overvoltage results of field test on switching 500kV Gezhouba-Feng-huangshan no-load Power line.Test results show that when both Gezhouba and Fenghuangshan substatons are connected with shunt reactors, circuit breaker is restrike free.When the circuit breaker is equipped with closing resistance, overvoltage is loss than 1·3 times.

切合空载长线是断路器的基本功能之一。本文对葛凤线切合空载长线试验的过电压实测结果进行统计分析。试验结果表明:当线路首、末端均接入并联电抗器后,断路器分闸无重燃、复燃。采用100Ω合闸电阻后,合闸过电压不超过1.3倍。

Most power supplies are three-phase system. However, there are cases where a single-phase arrangement is more beneficial of indeed the only solution. The connection of a single-phase load to a three-phase network results in a certain voltage unbalance, which affects also other loads. The load compensation must be taken when the degree of voltage unbalance exceed the certain limitation.Steinmetz circuit, as shown in Fig. la, is usually used for the single-phase load balancing. When load impendance varies the...

Most power supplies are three-phase system. However, there are cases where a single-phase arrangement is more beneficial of indeed the only solution. The connection of a single-phase load to a three-phase network results in a certain voltage unbalance, which affects also other loads. The load compensation must be taken when the degree of voltage unbalance exceed the certain limitation.Steinmetz circuit, as shown in Fig. la, is usually used for the single-phase load balancing. When load impendance varies the balancing conditions can be maintained by regulating the capacity of balancing equipment. The balancing equipment is regulated in such a way that variable capacitor units are used. Optimal grading of capacitors should be sta-died. There are two ways for this purpose. One takes reasonable grading combination, the other makes relative size of the step in balancing unit selected maximum. The former is capable of being implemented by binary combination and the latter will be discussed in this paper.The mathematical model of capacitor grading is represented by eq.( 4 ). If load power factor of Fig. 1 circuit is corrected to cos?ψ0, then the load currents in the three branches of the delta are expressed by eq.( 6 ).In eq.( 6 )the relation of impendance is represented by eq.( 7 ).Supply voltage is assumed to be balanced. In terms of Euler formula and eq. (7 ),the line currents are given by eq.( 8 ).Therefore, we get eqs.(11),(12)and(13). The relative size of the step in the-balancing unit selected must satisfy eq. (16). We can obtain .△Qb and △QC. Let u=tgψ0, substituting △Qb and △QC for eq. (5) yields eq.(18). According to Kuhn-Tucker's theorem, the necessary conditions for optimal solution defined by eq. (18) are eq.(19).The solution to eq.(19) are eqs.(20)and (21).It can also be proved that eqs.(20) and(21)are global optimal solution to eq. (18). Finally, we get optimal relative size of the step in the balancing unit selected which are represented by eqs.(24) and(25).The curves of △Qb, △QC and S versus ψare shown in Fig.2.By applying the optimal grading-method, it is possible to increase the availability of electric epuipment and simplify the design of balancing control system.

本文研究大功率单相负载平衡控制的电容最优分级问题。用最优化方法推导出Steinmetz电路中补偿和平衡电容的最优分级条件。采用最优分级,可提高电气设备的利用率,同时还可简化控制系统的设计工作。

When the nominal power, rated current and normal efficiency of a three-phase induction motor are known, and the no-load power and noload current under the constant network voltage, the loaded power in input and loaded stator current are determined, then the power output of the motor loaded can be calculated by the formula with error diminished within the allowance.

已知电动机的额定功率、额定电流和额定效率;测出在恒定电网电压下的空载功率、空载电流以及负载时的输入功率和定子电流、便可利用本公式计算出该负载下电动机输出的轴功率,其误差在工程允许范围之内。

 
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