查询词典 power transmission

In this paper the basic principle of dynamic simulation with PSS/E is presented; the effectiveness and adaptability of flexible HVDC power transmission model are analyzed, and on the basis of actual power system the quasi steady-state VSC-HVDC dynamic model VSCDCT is simulated. Simulation results show that it is available to apply PSS/E in transient stability analysis of practical large-scale AD/DC power system.

介绍了PSS/E动态仿真的基本原理；分析了柔性直流输电模型VSCDCT的有效性和适用性，并基于实际系统对准稳态直流动态模型VSCDCT进行了仿真研究，仿真结果表明 PSS/E直流模型能够满足大规模交/直流系统仿真的要求。

The monitoring results of the power frequency electric field intensity, power frequency magnetic field intensity ,radio interference and noise of sensitivity areas near the representative transformer substations and power transmission lines are analyzed emphatically.

简单介绍了安徽电网的基本概况，重点分析了具有代表性变电站和输电线路附近敏感区域的工频电场强度、工频磁场强度、无线电干扰、噪声等，全面评价安徽电网环境状况，指出存在的问题，并提出了相应的建议。

Reactive power optimization of power system is not only an effective means to ensure power system operation securely and economically, but also one of the most important methods to improve the voltage quality and reduce the transmission loss.

电力系统无功优化是保证电力系统安全、经济运行的一项有效手段，是降低网络损耗、提高电压质量的重要措施。

The results of the simulation analysis and experiments indicate that the loss of ultraviolet scattering transmission in atmosphere is high because of the particle scattering and absorbing in solar-blind zone; that is, the received power can descend 20 dB with the distance increasing 10 times. Therefore, the ultraviolet scattering is fit for short range communication. In short range, the pulse extension due to scattering is at microsecond order and its influence for low and moderate bit rate communication systems is weak. Since the light output power of a single ultraviolet LED is low, a multi-LED array can be used to increase the transmit power and extend the communication range.

仿真分析与实验结果显示：日盲区紫外光在大气中散射传输时由于大气粒子的强烈散射与吸收，传输损耗较大，距离每增加10倍，接收功率下降20dB，因此日盲区紫外光大气散射通信适用于近距离通信场合；近距离传输时散射造成的光脉冲多径展宽为微秒量级，对中低速通信系统影响较小；单个紫外LED发光功率较低，可通过多个LED阵列来提高发射功率，增大通信距离。

The authors analyze the operation characteristic of distance protection of transmission line connecting wind farm with power grid under the variation of parameters such as the amplitude ratio of electromotive force at both sides, the phase difference of electromotive force at both sides, equivalent impedance of sources, system frequency and so on; based on the real-time current and electromotive force at wind farm side as well as the information of wind power generators participating power generation, a method to adaptively set the operation boundary of distance protection by use of the information at wind farm side only is proposed.

文章分析了风电场和电网联络线的距离保护随电源电势幅值比、电势相位差、电源等效阻抗、系统频率等参数变化时的动作特性，并基于风电场侧的实时电流和电势与参与发电的发电机信息，提出了仅利用风电场侧信息量自适应整定保护动作边界的方法。

High voltage power transmission faces the problem of high altitude in China. In this paper, a mobile corona test cage is firstly applied to measure the AC corona audible noises of three types of transmission bundle lines in four areas with different altitudes. The effect on audible noise from altitudes was analyzed in details.

我国高压输电线路面临着高海拔特殊问题，利用可移动式电晕笼系统在4个不同海拔对3种导线进行了交流电晕可听噪声试验研究，得出了可听噪声海拔修正的初步结果。

The analysis of simulation result indicates that the CDMA system has much more superior performance on noise-immune; the continuous processing in the part of signal modulation can not improve the efficiency of spectrum in CDMA system; under the situation , making sure that the proximity of the reliability of information transmission to the unsmoothed system, the power of the transmission can decline to 90.5% of the unsmoothed system, the bandwidth of -50dB will decline to almost one half of the unsmoothed system in spread spectrum and dispread spectrum by using continuous WALSH codes.

仿真及分析结果表明：CDMA系统具有更优越的抗噪声性能；信息调制部分的平滑化处理在CDMA系统中不会改善频谱的利用效率；运用平滑化WALSH码进行扩频和解扩时，在保证信息传输可靠性与非平滑化系统接近的情况下，能够将发射功率降低到非平滑化系统的90.5%，-50dB带宽减小到非平滑化系统的一半左右，这有利于降低对临近频段的干扰，提高频谱的利用效率。

Detachable transformer is an important component of contactless power transmission system. This paper sets up the model of dissociable transformer by ANSYS and discusses various factors that may have influence on transmission efficiency by ANSYS and offers several guidelines to realize systems.

可分离变压器是非接触电能传输系统的重要组成之一，本文利用ANSYS软件，建立了可分离变压器的模型进行仿真，分析了电流、线圈绕制方法、变压器间距、磁导率等各种可能会影响传输效率的因素，并为实际系统选择模型提供了参考依据。

It is extensively used for different occasions that require DC power supply, including electrolytic chemistry, transmission, traction, electrostatic precipitation, electroplating and DC transmission etc.

整流变压器是指把电力网的三相正弦交流电压变换为所需要的交流整流电源的电压和相数的电源变压器，它广泛应用于点解化学、传动、牵引、静电除尘、电镀、直流输电等需要提供直流电源的场合。

At the same time, in the transmission system of construction machinery up-to-date, the power transferred by the transmission is improved greatly, while the gear friction is adopted in the transfer structure, so the heat loss will influence both the lubrication and cooling of the system, and the working intensity of the structure components. Therefore, the correction of the heat balance is necessary to the system.

同时，在现代工程机械的变速传动系统中，由于行星变速箱所传递的功率有了大幅的提高，但传递结构依然大量采用齿轮摩擦传动，其热损失不仅对系统的润滑和冷却有影响，而且对结构元件的工作强度也具有很大的影响，因此，也需要对该系统进行热平衡校核。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。