According to the fact that power factor of low voltage power networks is very low in china and field bus technology is developing in the world , in order to enhance power factor of low voltage power networks , on the basis of central transmitting and controlling information among every compensation equipment , the author of this dissertation studies systematically the design principles of power factor dynamic compensation system . based on analyzing structure of control system at present , the author of the dissertation puts forward a distributed completely and multi - layer structure framework based on field bus technology and builds a power factor intelligent dynamic compensation system . the functions of compensation unit , intelligent node , host computer , are presented 根据目前低压电网用电负载功率因数偏低和国内外现场总线技术的应用现状，立足于提高交流电机的功率因数，基于将每个补偿装置进行集中监控、信息集中传递的思路，本文作者在分析现有的控制系统体系结构的基础上，提出了基于现场总线技术的全分布式多层控制系统的体系结构，构建了功率因素智能动态补偿系统；对补偿执行单元子系统、智能节点子系统、上位机子系统三部分进行了功能分析。
The simulation results prove that active power filter can not only eliminate harmonic current effectively , but also have well dynamic compensation characteristics . designing of digital low pass filter and the effect of its cut off frequency on precision of instruction current are discussed in this paper 仿真结果证明，有源电力滤波器对于三相平衡负载或三相不平衡负载的谐波电流都起到了很好的补偿作用；同时当负载电流突变时，有源电力滤波器具有良好的动态补偿特性。
With the development of the technology of compensating the harmonics and var in the power system , the reactive power compensation device with bidirectional compensate timely is in great need in research on advanced reactive power compensation . and the device itself does not pollute power system with harmonic 随着电力谐波治理和无功补偿技术的发展，开发和研制能够对系统无功功率进行双向动态补偿的装置，而装置本身又不会对系统造成谐波污染，已成为现代无功补偿技术研究的热点。
Equipment of power quality dynamic compensation control realization can be either digital or analogical . the advantage of digital compensation control ( dcc ) is that it can compensate harmonics to a precision level and is independent of the surrounding environment . but dcc need high - speed real - time chips to deal with digital signal processing , so it has high price 电能质量动态补偿装置的控制是影响电能质量动态补偿装置的性能的重要因数,电能质量动态补偿装置的谐波补偿主要有数字补偿控制和模拟补偿控制两种,数字补偿的优点是可以对电网谐波的补偿达到很精确的程度,不容易受到外界运行环境的影响,但是要求运行速度很高的实时数字信号处理器,因此造价较高,模拟补偿控制对硬件要求比较严格。
Abstract : the digital pid control equation in microcomputer - based control systems is introduced . the effects of the technologies of digital smooth filtering ， first order recurrence filtering and dynamic compensation for improving the control features and enhancing the control accuracy are emphasized . the results of simulation test are illustrated 文摘:介绍了微机控制系统中的数字pid控制算式，重点分析了数字平滑滤波、一阶递推滤波和动态补偿技术在改善控制性能、提高控制精度中的作用，给出了仿真实验的结果图。
Secondly , this paper emphasizes how to apply this new friction model to practical valve controlled cylinder position servo system and realize the dynamic friction compensation . the paper designs the compensation law and uses the matlab / simulink tools to testify the compensation effect 其次，本文重点放在如何将新型摩擦模型应用到实际的电液位置伺服系统中，以实现对阀控液压缸电液位置伺服系统的摩擦力进行动态补偿，并应用matlab的simulink仿真工具进行仿真，通过调节摩擦补偿环节的参数可得到良好的补偿效果。
