This added voltage is mainly power line frequency and its effect on the voltmeter reading will depend upon the normal-mode rejection capability of the meter.
这个相加的电压主要为电源频率的信号，其对于电压表读数的影响决定于电压表的串模抑制能力。
On line predicting obtaining power system post disturbances steady frequency is beneficial for frequency stability assessment and emergency control.
在线预测系统扰动后的稳态频率，有利于扰动后系统频率稳定性评估和紧急控制。
Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
Verify ac line voltage phase and frequency with the controller data plate on the enclosure door prior to connecting ac power.
在连接交流电源之前，请验证交流电压、相位和频率是否与控制装置外壳门参数板上的相应数据相同。
In this paper, a scheme of Broadband Power Line Communication based on orthogonal frequency division multiplexing (OFDM) is discussed.
本文探讨了基于正交频分复用(OFDM)的电力线宽带数据传输方案。
Underfrequency Load Shedding (UFLS), which is the third defensive line of power system, is one of effective methods to mitigate the frequency collapses.
低频减负荷（UFLS）作为电力系统的第三道防线，是一种防止系统频率崩溃的有效手段。
The power frequency overvoltage of unloaded line because of the capacity effect is studied, and the effect of eliminating power frequency overvoltage using shunt reactors is analyzed.
讨论了空载线路在电容效应下产生的工频过电压，并对并联电抗器抑制工频过电压的作用进行了理论分析。
The Wigner Ville time frequency analysis in conjunction with properly selected OFDM parameters is applied to evaluate the signal dynamic range performance over the low voltage power line network.
为了研究OFDM信号在低压电力线上的传输情况，运用基于维格纳分布的时频分析方法对电力线上的信号进行分析。
Using Portable power frequency electric quantity test instrument as controlled equipments can measure and control equipments on-line by the pocket PC.
采用便携式工频电量测试仪作为受控设备，利用掌上电脑对受控设备进行在线测量和控制。
It compares the pilot distance protection with power line carrier (PLC) in the single or double frequency and the differential protection with optical fiber in the loop or chain connection.
比较单频率与双频率载波通道的纵联距离保护和环状与链状连接光纤通道的差动保护方案。
Line frequency hum, primarily induced by imbalance in the filament circuit wiring, the transformer used to power the filament, coupling into the signal leads, etc.
市电频率Hum，主要原因包括灯丝线路走线导致的不平衡；供给灯丝的电源变压器（缺陷）导致电源杂波耦合进入信号通道，等等。
Digital Power line USES a network, known as a High Frequency Conditioned Power network (HFCPN), to transmit data and electrical signals.
数字式输电线使用一个网络，以一个高频率被适应的力量网络(HFCPN)著名，传送数据和电信号。
Secondly, the paper designs and realizes the two level variable frequency heating power supply with line of 380V.
随后，本文给出了380V电源供电的二电平变频加热电源的主电路和控制电路的设计与实现。
Orthogonal Frequency Division Multiplexing (OFDM) is a critical technology for the realization of broadband power line communication.
正交频分复用(OFDM)是实现宽带电力线通信的关键技术。
The output power is measured by horn and electric probe and the frequency is measured by a wave-guide dispersion line.
实验采用喇叭天线接收和电探针恻量两朴方法时微波功率迭行了恻量，微波颂率用波导色散线法迭行恻量。
First, a suitable mathematical model for the frequency and tie line power of decentralized control is given.
首先给出一种适于对频率和交换功率进行分散控制的数学模型。
Comparative analysis of series compensated and non series compensated EHV transmission line in power frequency over-voltage and switching over-voltage is destriked in this paper.
对有补偿和无补偿的超高压输电线路在工频过电压、操作过电压方面进行了对比性研究。
Due to many advantages of Orthogonal Frequency Division Multiplexing technique, it becomes the best choice for low-voltage power line broadband communication.
正交频分复用技术以其多种优势成为低压电力线宽带通信的最佳选择，信道估计是正交频分复用系统的关键问题之一。
The analysis of the high frequency impedance in a distribution network is an important aspect of power-line communication.
配电网高频阻抗特性分析是当前电力载波研究的一个重要内容。
This paper introduces a power line modem chip SC1128 based on Expanding Frequency technique, analyzes it' s characteristic and compare it with other modem chips.
本文介绍了一种基于扩频技术的电力线调制解调芯片SC1128，分析其通信特性，与国内外同类产品进行了对比。
Close is the correlation between frequency regulation, peak load and tie-line regulation in the interconnected power system.
互联电网的调峰调频问题与联络线调整密切相关。
The dynamic power frequency impedance of TCSC is of great importance to the analysis of protective relaying characteristics on transmission line with TCSC.
TCSC的动态基频阻抗特性分析对研究含TCSC线路上的线路保护的特性具有重要意义。
The method to extract power character, the measure to find the peculiar frequency band and the results of classification will contribute to the design of an on-line BCI system.
所采用的特征提取方法、特征频段能量确定方法及分类结果都被应用于在线脑机接口系统设计中。
There is provided a method for measuring a parameter of a power frequency current being carried by a power line.
本发明提供一种测量由电力线承载的工频电流的参数的方法。
There is provided a method for measuring a parameter of a power frequency current being carried by a power line.
本发明提供一种测量由电力线承载的工频电流的参数的方法。
应用推荐