An effective method of microcomputer aided detection and frequency analysis of harmonic in power-network is presented.
本文给出了一种应用微机进行电网谐波检测与频谱分析的有效方法。
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。
This paper proposes a novel structure of high frequency AC hybrid resonant inverter power for electric vehicles, and describes design and analysis principle of the hybrid resonant network.
提出了一种用于电动汽车的高频交流混联谐振逆变电源的结构，描述了混联谐振网络的设计原则和分析方法。
The hybrid time-frequency method was modified to analyze the simultaneous switching noise in power distribution network.
对时频域混合方法加以改进用于分析电源分配网络同步开关噪声。
The frequency stability of the electric network is one of the most primary conditions of power system normal running.
电网频率稳定是系统正常运行的最基本条件之一。
The disconnection from power network of power plants under emergency conditions may cause serious frequency drop and then large area outage, even power network collapse.
在突然恶性事故情况下，由于发电厂的退出，电力系统有可能产生严重的频率下降，导致系统崩溃和大面积停电事故。
A medium frequency induction heating power source controlled by the microprocessor can not be run normally, in case its synchronous signals are disturbed by the harmonic from common network.
由于同步信号受电网谐波的干扰，常使微机控制的中频感应加热电源不能正常运行。
From the viewpoint of propagation of transient voltage and current in distribution network, the transfer characteristics of two-way power frequency signals in distribution network are analyzed.
从暂态电压和电流在配电网中传播的角度，分析了双向工频通信信号在配电网中的传输特性。
However, there are also problems such as frequency and voltage stability, power quality and the impact on the main network.
但微电网也存在频率电压稳定和电能质量、对主网的冲击等题目。
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。
High frequency harmonic in electric power network can pollute the network, control high frequency harmonic is an important research problem in electrical system function.
电网中的高次谐波对电网有污染，抑制高次谐波是电力系统运行中的重要研究课题。
Network traffic is broken down into different frequency, and anomaly change of network traffic is detected through the high-frequency power analysis, that is the change of wavelet variance.
将网络流量分解到不同的频段，根据高频段频谱能量，即小波方差的变化对网络流量异常进行检测。
Aiming at actual instance that the frequency of electric network is waving, based on twin-T resistance-capacitance active-trap filter, a trap filter which can filter the power interference between 49.
针对电网频率波动的实际情况，基于双t型阻容有源陷波电路，设计了可以滤除频带在49。
As a backbone of the Northwest power Network, Liujiaxia Hydropower Plant plays the roles of generate electricity, peak modulation, frequency modulation and voltage modulation.
刘家峡水电厂在西北电网中主要承担发电、调峰、调频和调压任务，是西北电网的骨干电站，在西北电力系统中处于十分重要的地位。
So harmonic current should be suppressed firstly rather than harmonic voltage. The harmonic characteristic on the network side and the ac side of medium-frequency power supply is analyzed.
分析了电网侧和中频电源交流侧的谐波特性，并针对中频电源提出了几种谐波抑制措施。
A novel high frequency switch power supply, which is suitable for power network outside, is introduced in this paper, and a automation switching circuit for 110V/220V input voltage has been designed.
介绍了一种适用于户外电网远程监测监控的不间断高频开关电源，设计了一种简易可靠的110V/2 2 0V自动切换电路，以满足宽范围电压输入要求。
Based upon discuss of the application of frequency-converter in the start, acceleration, exciting model transform and other processes the economic reconstruction plan is introduced for power network.
对同步电机启动、加速、励磁模式切换等工作过程中变频器的应用进行了论述，介绍了电网改造的经济方案，提出了变频器在使用时的注意事项，达到既要节能又要省费用的电网改造效。
Based upon discuss of the application of frequency-converter in the start, acceleration, exciting model transform and other processes the economic reconstruction plan is introduced for power network.
对同步电机启动、加速、励磁模式切换等工作过程中变频器的应用进行了论述，介绍了电网改造的经济方案，提出了变频器在使用时的注意事项，达到既要节能又要省费用的电网改造效。
应用推荐