Analysis of the Influence on HVDC Transmission System of DC Voltage Measurements of Master Pole Control System at the Inverter Side:Ⅰ. Influence on HVDC Transmission System of Abnormal DC Voltage Measurements of Master Pole Control System at the Inverter Side;
逆变侧送极控主系统直流电压测量结果影响分析 (一)逆变侧送极控主系统直流电压测量值异常对直流输电系统的影响
A method to reduce DC voltage measurement errors of multimeter;
减小万用表直流电压档测量误差的一种方法
The frequency measuring instrument of frequency translating into DC voltage based on differential coefficient circuit;
基于微分电路的频率/直流电压转换原理的频率测量计
The discussions about improve Sensitivity Ratio of the Direct Voltage at Pointer Multimeter;
对针式万用表直流电压档灵敏度的改进
The paper describes a measuring circuit of direct voltage with microcontroller AT89C51 and A/D converter ICL7109.
介绍由单片机AT89C5 1、A/D转换器MAXIMICL710 9组成的直流电压测量电路。
To solve the problem, a method to stabilize the DC-side voltage and two harmonic detection methods are put forward for power system containing various harmonics.
以目前有实用先例的注入式混合有源滤波器为例分析了电网中存在的非整数次谐波对混合型有源滤波器(hybrid active power filter,HAPF)的补偿性能和安全运行造成的影响,针对系统采用的谐波检测环节对非整数次谐波的不正确检测导致滤波器性能降低并致使直流侧电压波动的问题。
Whether the hybrid active power filter could get desirable effects of harmonic suppression depends on the constancy of DC-side voltage besides the correct design of the main circuit.
有源滤波器能否按其工作原理实现预期的谐波抑制效果,除了主电路设计合理之外,在很大程度上还依赖于保持直流侧电压的恒定。
Furthermore, rectifier is usually used to provide DC-side voltage for the existence of fundamental resonance circuit, it leads to a great fluctuation in DC-side voltage.
针对注入式混合有源滤波器中无源与有源部分补偿效果叠加、补偿谐波电流在经过注入支路和输出滤波器之后会产生一定的相位和幅值偏差,以及基波谐振支路的存在使得必须通过添加整流桥的方式获取直流侧电压从而难以保持直流侧电压的稳定等问题,提出了一种改进结构的新型谐振注入式混合型有源滤波器(hybridactivepowerfilter,HAPF),使直流侧电容能够与电网产生能量交换。
However,The DC-link voltage of the converter will fluctuate when the operational status of ACEG is changing,which may cause instability of the generation system.
双脉宽调制(PWM)控制的交—直—交电压型变频器适于用做交流励磁发电机的励磁电源,但交流励磁发电机运行状态的改变会引起双PWM交—直—交变频器直流链电压的波动,不利于整个发电系统的稳定运行。
frequency-DC voltage converter
频率-直流电压变换器
A plot of dc voltage or current versus time normally produces a straight line.
直流电压或电流与时间的关系图一般成直线.
Vacuum tubes require DC voltage sources as well.
真空电子管也要求以直流电压为电源。
Electric cables and wires--Method for D.C. voltage test
GB/T3048.14-1992电线电缆直流电压试验方法
Multi-Pulse Voltage Source Converter Based on DC Voltage Injection
基于直流电压注入的多脉动电压源换流器
transistorized regulated DC power supply
晶体管直流稳压电源
D.C.resistive volt ratio boxes
GB/T3928-1983直流电阻分压箱
AC-DC digital voltage meter
交直流两用数字电压表
multiterminal HVDC transmission system
多端高压直流输电系统
two-terminal HVDC transmission system
二端高压直流输电系统
HVDC transmission line pole
高压直流输电线路极线
AC current or voltage source. DC offset can be specified.
交流电流源或电压源。可指定直流偏移。
Study on Active Fiber DC Transducer Used in HVDC;
高压直流输电有源光纤直流电流传感器的研究
Direct current cannot use transformers to change voltage.
直流电就不能用变压器来改变电压。
±800kV UHVDC Overvoltage Simulation Research;
±800kV特高压直流输电内过电压仿真研究
Calculation of Three-pulse Harmonic Voltage Source for HVDC Transmission
高压直流输电3脉动谐波电压源计算
Studies on Overvoltage During Full-Voltage Starting in HVDC Transmission System
高压直流输电系统全电压起动过电压的研究
Direct-current-controlled Voltage Source Rectifier (VSR) System Based on Digital Signal Processor;
基于DSP的直接电流控制电压型整流器