采样值

• As the kernel of software , the algorithm is another emphasis of the paper ' s works . based on the principle of relaying working , after comparing the effect between the algorithm of instantaneous sampling and the algorithm of vector , the virtue of short data windows and precision action was stood out . and the choice of algorithm with three sampling data was for the reason of short data windows
  算法理论作为微机保护的软件核心也是本文的讨论重点，以保护的动作原理为基础，认真研究了采样瞬时值法与一般的矢量值法的效果比较，突出了采样瞬时值法时间窗短、动作准确的优点；而针对低电压闭锁所采用的三采样值积算法也正是出于时间窗较短，便于配合保护动作的考虑。
• Even if the fault spread from external fault zone to internal fault zone , the differential protection can avoid misoperation . main criterion of protection is composite - percentage current differential algorithm according to every sampled value , which can accelerate the protection ' s trip , reduce large amounts of calculation and have strong stability to ta saturation
  本文采用基于采样值的比率制动式电流差动保护算法作为保护的主判据，可以明显提高保护动作速度和减少计算量；具有较强的抗ta饱和能力，在区内故障时无制动，区外故障时有极强的制动特性。
• To sum up the use of these three buttons , let ' s say that if your computer has a low computing power and if you want to use area lamps and raytracing anyway , you could find useful to set a low samples value ( like 2 . 00 ) and activate the buttons dither and / or noise in order to simulate slightly softer shadows
  总结这三个按钮的用法，我们可以得出结论：如果你的计算机主频不高，但是你想使用区域照明和光线追踪等特性，你最好设置一个较低的采样值（例如2 . 00 ） ，并且激活抖动和/或噪声，从而简单地平滑一下阴影。
• In this paper , the application of dsp technology in electric power measurement meter has been studied , meanwhile analysed the error of the electronic energy meter , put forward the measure to compensate error with software method . it not only changes the precision degree of electric power measurement meter , but also avoids the disadvantage from error compensate with hardware method , it is unnecessary to adjust the sample value of voltage and electric current in circuitry
  对dsp技术在电度表中的应用进行了研究,对电度表系统的误差进行了分析,提出了采用软件方法来补偿误差的措施,使电度表的精度达到了设计要求,又避免了利用硬件进行误差补偿所带来的弊端,不用在线路中调整电压、电流采样值,有利于生产。
• Abstract : in this paper , the setting scheme of the current differential protection based on sampled values using fault component is investigated . the setting schemes of the resistance coefficient and the least trip differential current are discussed in detail . the probable protection setting values for the hv transmission lines are described . it testifies the feasibility for the applications of the protection to the hv transmission lines
  文摘:对基于故障分量的采样值电流差动保护制动特性曲线的整定方法进行了研究，详细讨论了其制动系数和最小动作电流的整定方法，同时对该保护在输电线路中的应用进行了初步的估算，说明了该保护的优异性能。
• Based on the comprehensive analysis of the application status and the existed problems of transmission line fault location , this dissertation presented a new algorithm for fault location based on two - terminal asynchronous data , which can make correction for the integrate error of line parameter , length of transmission line , sampling value and so on . at the same time , it can work out the two - terminal asynchronous phase angle with the corrected parameters
  本论文在充分分析了国内外故障测距的理论与技术以及存在的问题后，针对输电线路故障定位因线路参数变化对定位准确度的影响，提出了能够对线路的参数、长度和采样值等误差等进行综合误差修正( cie )的新算法，并利用修正后的参数来求解两端的不同步相角差。
• Firstly the electric - drive equipment is simplified in order that its circuits " working status could be obtained by computer by disposing the sampling value . secondly interface program is designed under objectarx2000 in order to drive the static circuit diagram drawed by autocad . lastly sampling value is transferred through the communication between pc and several sampling scms
  有几个关键性技术问题得到了解决：首先将电传动装置进行简化，使其电路工作状态通过计算机对电压采样值的处理得到确定；其次利用二次开发工具objectarx2000开发出接口程序，实现了对autocad所绘制电传动电路图的驱动；最后通过pc机同多个采样单片机的通讯解决了对大量采样数据的传输问题。
• The safety of transmission line plays a important role in power system safety it is not only the requirement of ensure supply power reliability , but also the necessary precondition of enhance power system stabilization , to remove faulty line quickly and accurately , also keep non - faulty line continuous work when some transmission line faults current differential protection is a kind of simple , reliable and good - selective protection manner to any variety of transmission lines , power system development needs current differential protection apply to transmission lines , moreover the advancement of electric and communication technology enable current differential protection apply to transmission lines firstly , the paper discusses , analyses the research and application transmission line protection in detail , compare the principle and realistic presupposition of general line pilot protections secondly , because conventional current vector differential protection are influenced easily by load current and transitional resistance , in order to at the same time quicken protection act , the principle and criterion include work characteristic of differential protect based on fault component sampled values are studied , results shows that differential protect based on fault component sampled values excels general vector current differential protection in reliability , sensitivity and anti - saturation of current transformer in addition , synchronous current sampling methods at all terminals of line is analyzed and estimated lastly , the principle and criterion . also device design about current sampling values differential protection based on optical fiber communication , which apply to short transmission lines are concretely investigated ,
  基于基尔霍夫定律的电流差动保护无论对于何种形式的输电线路都是一种简单、可靠、选择性强的保护形式，电力系统的发展使得电流差动保护应用于线路保护成为需要，而电子、通信技术的发展使得电流差动保护应用于输电线路成为可能。首先，本文对目前线路保护的研究和实际应用情况进行了讨论和分析，比较了常用线路纵联保护的实现原理和实现条件及优缺点。其次，针对常规相量电流差动保护易受正常负荷电流和故障过渡电阻影响的缺点，同时为加快差动保护的动作速度，对基于故障分量瞬时采样值电流差动保护的原理、判据、动作特性等作了讨论和分析，结果表明基于故障分量瞬时采样值电流差动保护在可靠性、灵敏度、抗电流互感器饱和方面明显优于常规相量电流差动保护，对电流差动保护各端的同步采样方法和数据通信也进行了分析和评价。