The original signals are detected by ac sampling algorithm in the protection system , at the same time , power system parameters , such as voltage value , current value are obtained through fourier transform , which accelerates the reaction speed of mcs and improve the reliability of mcs 綜合保護(hù)系統(tǒng)直接對(duì)傳感器二次交流信號(hào)高速采樣,利用傅立葉算法獲取所需電壓、電流等參數(shù),然后對(duì)需控量進(jìn)行監(jiān)視、分析、統(tǒng)計(jì)和判斷,從而使可信度、可靠性得到保障。
The quantizing error , linear error and differential linear error of an a / d converter were deduced , after that the error model of synchronous sampling , asynchronous sampling and quasi - synchronous sampling algorithms used in power measurement were build in condition that a / d was not perfect 推導(dǎo)了a / d量化誤差、非線性及微分非線性誤差的數(shù)學(xué)模型。然后,建立了采樣功率測(cè)量同步采樣算法、非同步采樣算法和準(zhǔn)同步采樣算法在非理想情況下的計(jì)算機(jī)仿真模型。
The software system consist of some software modules which realizing independent functions , such as initialization module , pi algorithm module , sampling algorithm module and interrupt module . under connection of the main program , these modules realize an integrated system 軟件系統(tǒng)由初始化模塊、 pi算法模塊、軟啟動(dòng)算法模塊、采樣算法模塊、中斷子程序模塊等幾個(gè)可以實(shí)現(xiàn)獨(dú)立功能的模塊組成,這些功能模塊在主程序的控制連接下,實(shí)現(xiàn)了一個(gè)完整的系統(tǒng)。
The controlling part of the comprehensive measuring instrument is 16 bits single - chip microprocessor 80c196kc . it is based on sampling theory and uses synchronous sampling algorithm to measure ac parameters of power system . it has many advantages as followed : complete functions , perfectperformance , portability , high - reliability , low cost and so on 該儀器以16位單片機(jī)80c196kc作為核心控制器件,采用同步采樣法測(cè)量理論及實(shí)時(shí)數(shù)據(jù)處理方法,具有功能齊全、可靠性高、性能價(jià)格比高、便于攜帶等優(yōu)點(diǎn)。
After the comparison with many algorithm , the paper chose alternating sample algorithm , and we also proposed a kind of fourier algorithm on the basis of dispersed fourier algorithm and its fast fourier algorithm , it improved systematic operation efficiency greatly , and made it can be used online among the practical devices . the system adopted module design , which was the foundation of upgrading and expanding system 本文還通過(guò)與多種算法的比較,經(jīng)綜合考慮最終選取了適應(yīng)系統(tǒng)需要的交流采樣方式,均方根算法,并提出了一種基于離散傅立葉變換及其快速傅立葉算法的用于諧波分析的全周波傅立葉算法,其大大提高了系統(tǒng)的運(yùn)算效率,使之能夠在實(shí)際裝置中在線使用。
The algorithms " accuracy is compared with the traditional quaternion algorithm via digital simulations . the simulation results are accord to the theory conclusion . and in this paper , it is discussed that how to select the optimal sample algorithm and how to make full use of the gyro data per update 在純錐運(yùn)動(dòng)條件下進(jìn)行了數(shù)字仿真,對(duì)各算法的精度進(jìn)行了比較,仿真結(jié)果與理論結(jié)果一致,另外對(duì)如何選取旋轉(zhuǎn)矢量幾階子樣算法作為姿態(tài)更新算法,以及如何合理利用陀螺儀輸出信息的問(wèn)題進(jìn)行了說(shuō)明; 5
( 3 ) adaptive sample algorithm such as predicted covariance threshold method , pre - establish sample interval method , and recursive method have been researched . we especially analyze the advantage and disadvantage of predicted covariance threshold method and pre - establish sample interval method , and present an improved pre - establish sample interval method 分析了當(dāng)前常用的預(yù)測(cè)協(xié)方差門(mén)限法,預(yù)先定義采樣間隔法以及遞推法,特別分析了預(yù)測(cè)協(xié)方差門(mén)限法和預(yù)先定義采樣間隔法的優(yōu)缺點(diǎn)后,綜合兩者的優(yōu)點(diǎn)提出了改進(jìn)的預(yù)先定義采樣間隔法。
This algorithm laid the foundations of other sampling inference algorithms , such as importance sampling algorithm and like - hood weight sampling algorithm . in this paper , the description of accurate and complexities of some kinds of sampling algorithms are presented on the basis of introduction to basic concepts of bayesian networks . first , the mathematical foundations of them are given here in view of statistics 本文首先介紹了bayesian網(wǎng)的一般概念及推理任務(wù),并主要著眼于bayesian網(wǎng)推理算法的數(shù)學(xué)原理,提出了樣本平均值算法,對(duì)幾種推理算法從數(shù)學(xué)角度做出本質(zhì)性的刻畫(huà),給出各自的復(fù)雜度和精確度的理論分析,證明了他們?cè)诟鞣N情況下的推理效率。
Analyze cure algorithm , give some improvements to the sampling algorithm and realize the algorithm in a client intelligent analysis system ( cias ) 1 . have a research and discussion over outlier detection . analyse some reason to result in outliers . especially discuss the distance - based outlier detection methods , put forword an idea that can quicken the procedure of outlier detection by utilizing partition 研究和探討了異常(孤立點(diǎn))檢測(cè)問(wèn)題,分析了導(dǎo)致異常的某些原因,討論了基于距離的異常檢測(cè)方法,提出了利用分塊來(lái)加快發(fā)現(xiàn)異常的速度以及初步把聚類和異常檢測(cè)結(jié)合起來(lái)的思想。
Abstract : the paper proposes a mathematical model of a / d converter with quantizing error , nonlinearity and differential nonlinearity errors for computer simulation , and based on the model , the errors caused by voltage change , current change and phase change in the power measurement are analyzed by computer simulation for both the asynchronous and quasi - synchronous sampling algorithms 文摘:本文提出了具有量化誤差、非線性誤差和微分非線性誤差的a / d轉(zhuǎn)換器的數(shù)學(xué)模型,在該數(shù)學(xué)模型的基礎(chǔ)上,仿真分析了非同步采樣法、準(zhǔn)同步采樣遞推算法各種情況下的誤差,包括功率測(cè)量中電壓線性、電流線性、相位變化誤差及電壓測(cè)量的誤差。