An algorithm which USES output of the Fourier filter to measure power system frequency is presented.
提出了一种利用富氏滤波器的输出测量电力系统频率的算法。
The recent achievements in the field of power system frequency measurement are summarisedin this paper.
较为全面地综述了国内外在电力系统频率概念及其测量技术方面的研究成果。
Only area power system frequency information data will be measured. The measurement will be taken at any level of power outlets.
可以选择测量区域，并在高压输电网和配电系统上的任何电压等级上进行测量。
An algorithm for power system frequency measurement based on numerical differentiation and central Lagrange interpolation is presented.
提出了一种基于数字微分和拉格朗日插值的系统频率快速而准确的测量算法。
Electric power system frequency is an important indicator of power quality and is one of the most important parameters of power system operation.
电力系统频率是电能质量的重要指标之一，也是电力系统运行最重要的参数之一。
This method adjusts sampling interval to trail after the power system frequency while harmonics analyzing, so that this method greatly reduces the spectrum leakage.
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。
It covers five aspects: supply voltage tolerance, utility harmonic, three-phase voltage unbalance, power system frequency tolerance, voltage fluctuation and flicker.
它涵盖五个方面：供电电压允许偏差、公用电网谐波、三相电压不平衡度、电力系统频率允许偏差、电压允许波动和闪变。
In a drive system of power transistor inverter-motor, not only can it be used in fine control of motor current waveform, phase, amplitude and frequency, but can also be used to sense, fault current.
在大功率晶体管逆变器——电动机驱动系统中，它不但可用来对电动机电流的波形、相位、幅值和频率进行精细控制，而且能快速地检测出故障电流。
This paper mainly discusses the control and protection system for the 20kw VSCF (Variable Speed Constant Frequency) Wave Power Electric Station.
本文着重介绍了20千瓦变速恒频波力发电系统的控制功能和保护体系。
System frequency of substation is dependant on active load of power grid. when system frequency exceeds allowable limits load shall be regulated immediately for stabilization of system frequency.
变电站的系统频率由电力网的有功负荷来决定，当系统频率超出允许范围时，应及时调整所带负荷以稳定系统频率。
Design work has also built a system is very particular about the power divider, it has a lower frequency than traditional units in terms of series inductance values.
系统还内置一个设计做工都非常讲究的功率分频器，它有着相对传统而言更低的低频单元串联电感值。
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。
A new method is proposed to reduce the peak-to-average power ratio of orthogonal frequency division multiplexing system.
提出了一种新的降低正交频分复用系统峰均功率比的方法。
LEO satellite communication system has the properties of larger power dynamic range, larger and faster changed doppler frequency shift and rapid fluctuation compared to ordinary communication system.
相对于一般的通信系统而言，低轨卫星通信系统具有信号动态范围大，多普勒频移大且变化速度快，信道起伏剧烈等特点。
The working processes of the frequency-tracking phase-shift PWM controlled full bridge power supply load series resonant type DBD ozone generation power system are analyzed.
系统的分析了频率跟踪移相PWM控制全桥供电的串联谐振负载式DBD型臭氧发生器电源系统的工作过程。
Maintenance department: maintenance industries circuit boards, machine equipment system, main board, controller, power supply, frequency converter, PLC and touch screen.
维修部：维修各行业电路板，机加工设备系统，主板，控制器，电源，变频器，PLC触摸屏等。
This paper presents a new method for adaptive Power System Stabilizer (PSS) design in frequency domain.
本文提出了一种自适应电力系统稳定器设计的频域方法。
The switch frequency of the direct power control system using hysteresis comparator is not fixed, which is a technical issue in practical needing be solved.
采用滞环比较器的直接功率控制系统的开关频率不固定，是实用化过程中需要解决的一个技术问题。
A long field running of the medium-frequency power supply shows that the control system presented in this paper greatly improves its stability and quality.
长期的现场运行表明，这一控制系统大大提高了电源的可靠性及中频电源产品质量。
The frequency stability of a ship power station is decided by the speed response characteristic of diesel engine speed regulation system.
船舶电站频率的稳定性主要取决于柴油机调速系统的转速响应特性。
This paper describes a new technique for measuring the operating frequency of a power system.
该文介绍一种用来测量电源系统工作频率的新方法。
The authors propose an additional control strategy, which changes the power or current order according to the variation of system frequency, thus the power balance of the grid can be implemented.
提出了一种附加控制策略，该附加控制策略根据系统频率的变化改变直流系统的功率或电流指令，从而实现系统功率的平衡。
A variable speed constant frequency wind power generation system of doubly-fed induction generator based on converter excitation was described.
建立了基于变换器励磁的双馈感应电机的变速恒频风力发电功率控制系统的模型。
The frequency stability of a ship power system is determined by the speed response characteristic of the diesel engine speed regulation system in the ship power station.
船舶电力系统频率的稳定性主要取决于船舶电站柴油机调速系统的转速响应特性。
Under malignant emergency conditions, the frequency of power system seriously and consequently drops down which lead, system to collapse and a large area outage.
在突然恶性事故情况下，电力系统产生严重的频率下降，导致系统崩溃和大面积停电。
After discussing the conceptions of power system average frequency and power system oscillation period.
探讨了系统平均视在频率及振荡频率的概念。
The frequency response function of power saw system reflects the dynamic characteristic of the system.
油锯系统的频率响应函数反映油锯系统的动态特性。
The main purpose of modeling is to reflect the actual process of ALFC and main factors that influence the frequency quality of power system in the process.
建模的主要目标是：反映自动负荷频率控制的实际过程，以及在这一过程中影响系统频率质量的主要因素。
If the frequency of oil-pressure pulsation is near to power system natural oscillations frequency, power system low frequency oscillations of resonance mechanism can be induced.
全液压调速系统的油压容易产生脉动，如果油压脉动的频率与电力系统固有频率接近时也可能引发电力系统共振机理的低频振荡。
If the frequency of oil-pressure pulsation is near to power system natural oscillations frequency, power system low frequency oscillations of resonance mechanism can be induced.
全液压调速系统的油压容易产生脉动，如果油压脉动的频率与电力系统固有频率接近时也可能引发电力系统共振机理的低频振荡。
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