电网频率稳定是系统正常运行的最基本条件之一。
The frequency stability of the electric network is one of the most primary conditions of power system normal running.
基于正交变换，提出了一种新的电网频率跟踪方法。
Based on orthogonal transform, a new method of tracking power grids frequency has been provided.
该文介绍一种基于相位差校正的电网频率测量方法。
The high-precision frequency measurement is the base of a great deal of applied technologies.
当风力发电机组在额定风速启动并网时，对电网频率的影响较大。
Wind turbine generators have relatively large influence on grid frequency when they start up and are connected to the power grid.
由一次调频决定的电网静态调频特性，则是电网频率稳定性的基础。
The static frequency modulation characteristic of electric network is the foundation of frequency stability of the electric network that determined by frequency modulation.
同步电动机不但功率因数高，而且其转速与负载大小无关，只决定于电网频率。
Not only high power factor synchronous motor, and its speed is independent of the load, depends only on grid frequency.
采用此算法可实时跟踪电网频率波动，极大地减小频谱泄漏提高谐波测量精度。
This method adjusts sampling interval to trail after the power system frequency while harmonics analyzing, so that this method greatly reduces the spectrum leakage.
当风力发电机组在额定输出有功功率跳闸退出电网时，对电网频率的影响最大；
Wind turbine generators have the biggest influence on grid frequency when the generators trip and exit the power grid at rated active output power.
使用本算法，在测量时可以以固定采样率进行采样，不必根据电网频率调整采样间隔。
Using this algorithm, this paper has adopted fixed sampling rate when measuring without adjusting sampling intervals according to network frequency.
在线调节步长改变电压收敛速度，设计锁相控制电路，自动同步跟踪电网频率和相位。
The online variable step can also regulate the voltage convergence rate, and the phase-locked control circuit is designed to synchronously trace frequency and phase of power grid automatically.
提出了一种适于高精度实时电力谐波分析的自适应调整采样频率的电网频率跟踪算法。
An adaptive sampling frequency tracking algorithm which adapt to realization of precise real time harmonic analysis is introduced.
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。
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.
自动发电控制(agc)是调整电网频率与有功功率、保证电网安全、经济运行的重要措施之一。
Automatic generation control (AGC) is one of the important measures to regulate the frequency and active power of power grid and ensure its security and economic operation.
针对矿井配电系统的特点，设计了适合矿井电网的LC滤波装置，通过仿真实验说明滤波器对电网频率波动具有较好的适应性。
Presents a new approach for limiting harmonic and improves the reactive compensation using LC filter in power system. The simulation experiments valid…
“这是一个巨大的改变，我们可以用更环保、更持续的方法来让电网实现频率的调整。”灯塔公司首席执行官比尔·凯普上周在华盛顿出席电网周（GridWeek）大会时说道。
"It will signal a dramatic shift to a cleaner, more sustainable method of providing frequency regulation on the grid," Beacon CEO Bill Capp told the GridWeek conference in Washington last week.
大电网互联系统的频率与潮流问题。
Frequency and power flow of interconnected large power system.
当故障导致供电系统与外电网断开后，此时供电系统因有功不平衡，将出现频率崩溃现象，导致大面积停电事故。
When disconnected with external power grid due to certain fault, it will result in frequency collapse, and even leads to large-scale blackout owing to the active power imbalance.
谐波频率在电网中是造成电能质量问题的常见原因。
Harmonic frequencies in the power grid are a frequent cause of power quality problems.
尽管供电电网中不大可能在正常工作频率下谐振，但有可能在其它谐振频率下谐振。
Although it is unlikely that resonance in a supply network be obtained at normal supply frequency, it is possible to have this condition at harmonic frequencies.
电频率快速、准确测量是电网及电气设备运行、控制、调节的基础。
Accurate and fast estimation of electric frequency is the basis of operation, control, and regulation of power system and electric equipments.
要分析电网的暂态特性，还必须考虑衰减直流分量和衰减正弦波，以及电压缺口和频率偏移等问题。
Such problems as the attenuation of DC elements and Sine waveform, voltage sag and frequency deviation should be taken into account in order to analyze the transient process in the power system.
对江苏电网部分容易引起谐振的站点进行了频率扫描，并提出了一些谐波补偿和抑制的有益建议。
Frequency scan is carried out for some sites of Jiangsu Power Grid, which are easy to be resonated. Suggestions are put forward for harmonic compensation and suppression.
该汽车的电池可以作为一种方法，以稳定的发车频率和年后，饲料储存的能量返回到电网。
The cars' batteries can serve as a way to stabilize frequency on the grid and, years from now, feed stored energy back into the grid.
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。
However, there are also problems such as frequency and voltage stability, power quality and the impact on the main network.
通过两区域互联电网仿真实验，同其他频率偏差系数的设定方式进行了分析和比较，其结果表明了该方法的优越性。
Compared with other bias Settings in two-area interconnected power system model, the simulative results indicate the superiority of the proposed technique.
当电网电压和频率的变化时，分析了电动机、变压器、控制及保护系统、照明系统、通信导航设备等受电器工作的可靠性。
When the variation of bus-bar voltage and frequency occurs, the reliability of electric motors, transformers, control and protection system is analyzed in this thesis.
复合材料交流电性能参数随频率的变化规律表明活化炭黑在聚丙烯基体中已形成导电网络。
The variation of ac electrical properties as a function of frequency shows that the conduction network of carbon black has been formed in the composites.
针对电网出现的频率偏差，提出一种谐波负序电流指令的检测方法。
According to the frequency excursion in power systems, this paper proposes a detecting method of harmonic negative current instructions.
针对电网出现的频率偏差，提出一种谐波负序电流指令的检测方法。
According to the frequency excursion in power systems, this paper proposes a detecting method of harmonic negative current instructions.
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