By means of analyzing the VSC-HVDC technology, it is put forward to consider the error of the stored energy unit power as an additional signal for the DC bus voltage control. 通过对有源型电压源直流输电技术的分析,提出将储能单元的充放电功率与其参考值的偏差作为直流电压控制的附加信号的控制策略。
This voltage has some assumed value of impulse current through it, plus an additional voltage related to the distance between the arrester and that point. 此电压值为设定冲击电流流过避雷器时的电压,再加上避雷器与该点间距离所相关的附加电压。
The upper metal nanocrystals as an additional charge trap layer enable the direct tunneling mechanism to enhance the flat voltage shift and prolong the retention time. 说明顶层的金属纳米晶作为一层额外的电荷俘获层可以通过直接隧穿机制进一步延长保留时间和提高平带电压漂移量。
However, the utility source for a plant may contain additional harmonic voltage distortion arising from external sources. 然而,对工厂实用电源可能包括由外部电源引起的额外的谐波电压畸变量。
It is suggested that the additional voltage adjustment for excitation regulator of large generator should be put into service. 建议大型发电机组励磁调节器应投入附加调差。
The turns of the transformer additional winding should be determined from the trade-off between lower voltage across the energy-storage capacitor and lower total harmonic distortion of input current. 因此,在选择变压器附加绕组匝数时要折中考虑,在保证储能电容电压较低时,又要使变换器输入电流谐波满足有关标准。
Additional loss and voltage deviation caused by unbalanced operation of distribution transformer and Countermeasures 配电变压器三相不平衡运行带来的附加损耗、电压偏差及补偿方法
An additional high voltage pulse generator is constructed to make the MH lamp be fast and safely turned on. 巧妙利用主电路整流器件构造高压脉冲触发电路,使车用MH灯能瞬时快速启动;
Moreover, the present patterns have two additional important characteristics. First, the intensity distribution of patterns changes with the electron energy ( the electron accelerating voltage). 这种花样具有两个重要性质:(1)花样的强度分布是随着电子能量(电子的加速电压)而改变;
Additional H_ ∞ controller of VSC-HVDC system is designed by use of H_ ∞ control theory. Meanwhile, a simulation on Matlab/ Simulink is proceeded to do some researches and the results show that the designed controller can effectively limit the disturbance of AC voltage d-axis component. 利用H∞控制理论设计了VSC-HVDC系统附加H∞控制器,使用Matlab/Simulink进行了控制器的仿真研究,其结果表明设计的控制器能有效抑制交流侧直轴电压分量的扰动。
In additional, a computer-based simulation to the ultrasound transmitting circuit is performed so as to prove the feasibility of low voltage triggering and portable function. 另外,本文还对超声发射电路进行了计算机仿真,验证低电压触发与实现便携式的可行性。
In additional, the use of inner negative feedback makes a steady-going voltage for the band gap reference and increase the PSRR. 此外电路又采用了内部负反馈回路,使基准电压源工作一个稳定的电压下,从而提高基准电压源的电源抑制比(PSRR)。
Additional nonlinear controllers are designed based on the exact linearization approach by state feedback. The control modes are constant AC voltage at the inverter and constant direct current at the rectifier. 为进一步改善高压直流输电系统的性能,用状态反馈精确线性化方法设计了整流侧定直流电流、逆变侧定交流电压的非线性附加控制器,只需少量局部反馈信号便可获得良好的调节性能。
The new topology can balance the DC link capacitor voltages by itself without additional circuit and separated DC voltage sources, regardless of the load characteristics. 该拓扑不需要附加电压平衡电路和使用独立直流电压源,不管在什么负载特性下,自身都能够实现中点电位平衡。
An Additional Study on Site Selection for Three Gorges Converter Station The phenomenon of voltage instability on the converter bus is an important problem affecting normal running of HVDC, especially HVDC system connected to weak AC system. 对交直流混合电力系统,特别是含多个直流换流站的电力网络,换流站交流母线的电压稳定问题是困扰直流输电系统正常运行的一个重要问题,特别在受端系统较弱时更是如此。
It requires an additional DC-DC converter to boost the output voltage ( VSI) or the output current ( CSI). 如果要得到更高的电压(或更大的电流),就必须增加一个额外的直流升压变流器。
The test result shows that the quantity of embeded flock increased with the added flocking time and additional voltage, but decreased with the added distance of plate. 实验证明在其他条件一定时,植入绒毛量随着植绒时间和外加电压的增加而增加,随极板距离的增加而减小。
The characteristics of a G-M counter under an additional RF voltage 附加射频电压供电时盖格计数管的性能
But chopper regulator control system can produce harmonic, cause additional loss, the motor heat, power grid voltage distortion, and other hazards. 但是斩波调压系统会产生谐波,引起附加损耗和电机发热、造成电网电压畸变等危害。
The entire system has no any additional sensors, and is full use of electromagnetic induction to generate drive signals and the feedback of the induced voltage signal, with strong anti-interference, suitable for on-site advantages of the online environment. 其整个系统没有任何附加的传感器,完全利用电磁感应原理来产生驱动信号和检测感应电压信号的反馈,具有抗干扰能力强,适合于现场环境下的在线测量等优点。
In additional to these works, the spring constant, pull-in voltage, operation voltage, natural frequency, switch time and squeeze-film air damp coefficient were deduced. 此外,还推导了GMLM器件的等效弹性系数、吸合电压、工作电压、固有频率、开关速度和压膜空气阻尼系数的理论计算公式。
In AC/ DC parallel system with single machine case, the parameters of VSC additional reactive power controller have been selected, and dynamic simulation result has verified that VSC with the additional reactive power controller can suppress AC voltage fluctuation effectively. 在单机交直流并联系统算例中对VSC附加无功控制器参数进行了配置,动态仿真结果表明该附加无功控制器相比于定无功功率控制能够有效的抑制交流电压波动。