Results were also run for different high ( relative to the line impedance) impedance values, including 900 ohms. 此结果也在不同(相对于线路阻抗)的阻抗值上运行了,包括900欧姆。
The reflection of tapered transmission line impedance is analyzed in theory and the VSWR curve of coaxial to plane converter is drawn. 从理论上分析了渐变式传输线阻抗变换的反射与频率的关系,进而分析了同轴到平板过渡的电压驻波比关系式;
So for the medial and low voltage electrical networks, the voltage quality always cannot be satisfied with users 'needs because of the increase of the line impedance and transmission power; 因此,在中低压电网中往往由于线路阻抗和输送功率的增大而使电压质量不能满足用户的要求;
Rigorous field analysis of radial line impedance transformers in rectangular waveguides 矩形波导中径向线阻抗变换器的严格场分析
In the calculation the parameters of the cable must be determined first, including the line impedance, phase sequence impedance, self and mutual impedance. 这必然涉及线路阻抗、相序阻抗和自互阻抗等参数。
The capacitance selection of DC-link voltage for SVG inverter is dependent on the inverter type, control strategy, and line impedance. SVG中逆变器直流电容的选择与逆变器结构、控制策略、线路参数等都有很大的联系。
By analyzing current distributions, raised applicable to the fault location methods of all parallel AT traction system, and obtained the line measured impedance of these three short circuit faults. 通过对电流分布分析,提出了适合全并联AT供电牵引网的故障测距方法,并给出了3种情况下的线路测量阻抗。
The numerical results were obtained in a table by solving the combined equation of transmission line impedance transfer equation and terminal input impedance expression in gas capacitance. 通过解传输线阻抗转移公式和终端输入阻抗的气隙电容表达式的联立方程得出了数值结果。
Series capacitor has advantages of decreasing transmission line impedance and increasing transmission capability, and is used more and more widely in high voltage transmission system. 串联补偿电容器能在一定范围内减小输电线路阻抗,提高输送功率极限,在高压输电系统中得到越来越广泛的应用。
It is thoroughly considered in this new method that harmonic attenuation, reactive power compensation, mistuning, background harmonic and resonance with power line impedance. 该方法较全面地考虑了谐波治理、无功补偿、背景谐波、失谐、与电网阻抗的串并联谐振等问题。
This paper discusses the complicated oscillation behavior of power systems affected by small perturbations of load or transmission line impedance. 本文讨论电力系统受负荷或线路阻抗小扰动的复杂振荡行为。
This paper treats of frequency stability of conventional 12-channel carrier transmitters as used in collieries, with particular reference to the considerable variations of underground transmission line impedance and fluctuations of supply voltage. 本文根据煤矿井下载波传输线路阻抗变化大、电源电压波动大的特点,针对传统的矿用十二路载波发射机,讨论了其振荡频率(即发射频率)的稳定性问题。
This system can solve the problems brought by the variation of power line impedance. 实验表明,阻抗测量算法准确性很高,匹配方法可行,从而解决了因电力线载波通信中电力线阻抗实时变化带来的各种问题。
Analysis of matrix line impedance, matrix phase sequence impedance and parameters of power cables in underground tunnels 地下隧道中电力电缆的线路阻抗矩阵相序阻抗矩阵和参数的分析
In this paper a plain expression of a line impedance matrix and phase sequence impedance matrix is presented to express the two ends earthing transmission cable system with the intersect connection of cable sheath but non transposition of the cable core. 文章给出了电缆线芯不换位、金属护套交叉互联两端接地系统的线路阻抗矩阵、相序阻抗矩阵的直观表达式;
The lightning current distribution is analyzed under different waveform of the injected current, different line impedance, and earthing impedance etc. 研究表明,接地电阻的改变对雷电流的分布影响较大。
Multiple Fixed Points Transmission Line Impedance Measurement for Energy Storage Antenna 储能天线阻抗的传输线多定点测量方法
To solve the problems in instrument transformer calibrating device, improving methods and suggestions are proposed. At the same time, The error of instrument transformer which is affected by secondary line impedance configuration, and measurement, is further expounded. 针对互感器检定装置中存在的问题,提出了改进的方法和建议,同时对影响互感器误差的二次线路阻抗的配置和测量做了进一步阐述。
A perfect DGS includes parallel inverter module, output line impedance, AC mains, and the load connected to AC mains. 理想的分布式发电系统包括并联的逆变电源模块、输出线路阻抗、交流总线以及接在交流总线上的负载。
The parallel effects of line impedance on the coordination of different type SPD are studied. And the software simulation is used to prove the correctness of the analysis. 研究了多分支线路的并联效果对不同类型SPD间配合的影响,并通过软件仿真验证了理论分析的正确性。
In order to improve the phenomenon that parallel system has poor current sharing under different line impedance, the paper improves PQ droop control from the aspect of line impedance voltage compensation, and the new control strategy are validated by simulations and experiments. 为了改善连线阻抗不等时并联系统均流性的问题,本文从连线阻抗电压降补偿的角度入手,给出了改进的PQ下垂法,并对这种新的控制策略进行了仿真和实验验证。
The periodic current subtransient attenuation of generator is taken into consideration, when calculating the short-circuit of generators, and the decay time constant is corrected in view of the line impedance when the short-circuit point is away from the bus-bar. 2. 在计算发电机短路电流时,考虑周期分量的超瞬态衰减,考虑短路发生在远离汇流排位置时线路阻抗对短路电流的影响,并对周期分量衰减时间常数进行修正。
The characteristic impedance of signal lines in low and high frequency of expressions are derivated in this chapter. And it summarizes the types of signal lines and the advantages and disadvantages of commonly used transmission line characteristic impedance formula. 在本章中,推导了信号线在低频及高频时特性阻抗表达方式;概括出信号线的种类和优缺点,及常用传输线的特性阻抗公式。
Next, it introduces the principle of PQ droop control method, shows the current sharing control equations under different line impedance and illustrates the limitations of PQ droop control method. 接着介绍了PQ下垂控制法的原理,给出了不同连线阻抗下的均流控制方程,并对PQ下垂控制法应用的局限性进行了说明。
Based on the assumption that the fault path resistance is purely resistive and current distribution factor is real number, fault line impedance is obtained. 算法假设接地故障的过渡电阻为纯电阻性,电流分配系数为实数,求解故障线路阻抗。
The transmission line impedance which contains a series compensator is no longer uniform. 线路中含有串联补偿器,而破坏了输电线阻抗的均匀性。
Using the commonly method used in engineering to determine the re-transmission line characteristic impedance of the bus board and calculate the optimal matching resistor. 对总线板的传输线特性阻抗重新进行确定,计算出最佳的匹配电阻阻值,并对总线板相关的匹配电阻进行更换后重新带载测试。
At the same time, through the analysising that current and voltage amplification principle and line impedance frequency characteristics. 同时,结合对电流、电压放大原理和线路阻抗频率特性的分析得知。
The parallel effect of line impedance and load on the protection distance of SPD is studied. 研究了多分支线路和负荷的并联效果对SPD保护范围的影响。