n present power system, the engineers face variety of challenges in planning, construction and operation. In some of the problems, the engineers need to use managerial talents. In system design or upgrading the entire system into automatic control instead of slow response of human operator, the engineers need to exercise more technical knowledge and experience. It is principally the engi- neer’s ability to achieve the success in all respect and provide the reliable and uninterrupted service to the customers. This chapter covers some important areas of the traditional power system that helps engineers to overcome the challenges. It emphasizes the characteristics of the various components of a power system such as generation, transmission, distribution, protection and SCADA system. During normal operating conditions and disturbances, the acquired knowledge will pro- vide the engineers the ability to analyse the performance of the complex system and execute future improvement
上傳時(shí)間： 2020-06-07
上傳用戶：shancjb
Modern power systems involve large amount of investment. An electric power system comprises of generation, transmission, and distribution of electric energy. Growth of power systems has led to very complex networks extended across large areas. In such situations, the proper functioning of a modern power system is heavily dependent upon the healthy operation of the transmission lines within it. Transmission lines are used to transmit a huge amount of power over a long distance. But as these lines are located in the open atmosphere, they are highly affected by different types of abnormal conditions or faults.
標(biāo)簽： Transmission Protection Line
上傳時(shí)間： 2020-06-07
上傳用戶：shancjb
The next avatar of the Internet will revolutionize our world. In time, it will provide us a universal remote control, enabling us to monitor and control physical objects located anywhere on the planet, using a smart phone. It will make the universe around us programmable, allowing us to script the behav- ior of physical objects with electronic commands. This book is about such an emerging new version of the Internet.
標(biāo)簽： Infrastructure Construction Design RFID and an of
上傳時(shí)間： 2020-06-08
上傳用戶：shancjb
Building a robot and enabling it to sense its environment is a wonderful way to take your Arduino knowledge to the next level. In writing this book, I have brought together my love for invention and my experience with electronics, robotics and microcontrollers. I hope you have as much pleasure building and enhancing your robot as I did developing the techniques contained in this book.
標(biāo)簽： Arduino-Controlled Robot Make an
上傳時(shí)間： 2020-06-09
上傳用戶：shancjb
This edition of Digital Image Processing is a major revision of the book. As in the 1977 and 1987 editions by Gonzalez and Wintz, and the 1992, 2002, and 2008 editions by Gonzalez and Woods, this sixth-generation edition was prepared with students and instructors in mind. The principal objectives of the book continue to be to provide an introduction to basic concepts and methodologies applicable to digital image processing, and to develop a foundation that can be used as the basis for further study and research in this field. To achieve these objectives, we focused again on material that we believe is fundamental and whose scope of application is not limited to the solution of specialized problems. The mathematical complexity of the book remains at a level well within the grasp of college seniors and first-year graduate students who have introductory preparation in mathematical analysis, vectors, matrices, probability, statistics, linear systems, and computer programming. The book website provides tutorials to support readers needing a review of this background material
標(biāo)簽： Processing Digital Image
上傳時(shí)間： 2021-02-20
上傳用戶：
歐母龍PLC例程PLC控制器源碼255個(gè)合集:1600T俄羅斯壓力機(jī).rar200噸壓機(jī)程序 omron 的機(jī)子C系列的.rar3MK136舊磨床現(xiàn)程序.rar3電機(jī)延時(shí)控制啟停.rar5V編碼器信號(hào)如何接入CP1H高數(shù)計(jì)數(shù)案例.rar6路搶答器源碼.rar902002 OMRON.rarASCII Generic Protocol Macro Object Code.zipASCII Generic Protocol Macro.zipC3電樞異物吸引.rarCalendar Calculation.zipcarbon.rarCompact Flash Memory Write.zipCounter Multiplex.zipcp1h 高速計(jì)數(shù)觸發(fā)中斷注意點(diǎn).rarcp1h-x40用在非標(biāo)飲料線上的程序,有注解.rarCP1H與愛(ài)默生溫控模塊的通訊程序.rarCP1L and CP1H EasyModbus FB.zipCPM1A編寫(xiě)的贊揚(yáng)15T立式注塑機(jī).rarCPM2A Interupt High Speed Counting Sample.zipCPM2A自身時(shí)鐘六個(gè)時(shí)間段觸發(fā)程序.rarCQM1 Host Link Master.zipCQM1H 21的例子程序，有溫度壓力等PID控制。.rarCQMaster.swp.zipCS CJ CP NSJ password set.zipCS1 C Mode Hostlink.zipCS1-CJ1 Floating Point to Fixed Point Conversion for HMI.zipcub.rarCX-Programmer Ver.5 Introduction Guide R120-E1-01..zipCX-Programmer Ver.5 Introduction to Function Blocks Guide R121-E1-01.zipC_Mode_Hostlink.zipDeviceNet Explicit Message Example.zipdieban.rarEasy to use Modbus RTU Master for CP1L CP1H CJ1 CJ2 CS1.zipExample of Using Daylight Saving FB's.zipExample Scale Meter Protocol.zipFB Calculate Day Of Week.zipFB Day light savings function block.zipFB Extract Time Date into SecMin Hr Day Mth Yr.zipFB Scale with parameters.zipGKF1250離心機(jī)CXP.rargkf1250離心機(jī)cxpgkf離心機(jī)omron.rarJH21-200程序.rarLED液壓機(jī).rarlogging+ filewrite.ziplpr-des.rarModbus Protocol Macro Object Code.zipModbus Protocol Macro.zipModbus RTU Sample Code CJ1-SCB.rarModbus TCP Client using FB's.zipOmron CS1 Sequencer.zipOMRON E6CP絕對(duì)值編碼器使用實(shí)例。編碼器為8位格雷碼輸出.rarOmron Modbus Slave Ladder.zipOmron Plc 變頻一帶三例程.rarOMRON PLC編程示范.raromron--MOV傳送指令.raromron-cs1g-h-cpu42日本機(jī)的程序.rarOmron_CJ2_to_AB_EIP_Tag_Datalink_Example.rarOMRON接駁臺(tái).rarOMRON控制2伺服.rarOMRON溫度，壓力模擬量輸入程序.rarOMRON照明設(shè)備程序.raromron的PLC案例程序.rarOMRON程序舉例.rarOMRON程序舉例2.rarOMRON紙病分析系統(tǒng)-PLC程序(CJ1G).zipomron脈沖輸出到驅(qū)動(dòng)器的程序.rarPCB 沉銅線程序.rarPID溫度控制的PLC程序設(shè)計(jì)實(shí)例.rarPinstamp.zipPLC Clock adjustment with screen.zipPLC錳鋼程序cpm2a.zipPolls and Writes setpoints to E5CK Process Controller - E5CK.swp.zipPRO9連拉.rarProcess states sequence logics.zipQuadrature Input for Standard CPM1A DC Inputs.zipRandom Number Generator.zipScaling in CJ1 CS1 PLC's.zipSMS - GSM PLC Communications.zipsony 公司 某機(jī)臺(tái)控制程序.rarStepNext.cpt.zipSTUP Example.zipTemplate for Step-Step Next Sequence.zipToggle Button.zipTracking product on conveyor.zipTXD-RXD Quickstart Programs.zipTXD-RXD Serial Port Handling.zipUseable timer.zipV600-E5CK.zipV700-V720 RFID Protocol Macro.zipVB與OMRON PLC通訊源碼.rarWoodwood Controler Example Protocol Program.zipYH32-315油壓機(jī)程序.rar一個(gè)CJ1M的程序.rar一個(gè)OMRON程序,帶位置控制模塊.rar一個(gè)生產(chǎn)線上潤(rùn)滑控制的小程序.rar一些簡(jiǎn)單的cpm1a程序.rar一控三恒壓供水程序.rar三層提升機(jī)歐姆龍CQM1H程序.rar三菱400噸和200號(hào)沖床程序.rar上海產(chǎn)自動(dòng)模切機(jī)飛達(dá)部程序.zip上海獅印全自動(dòng)啤機(jī)程序.rar東芝壓鑄機(jī)梯形圖.rar兩步法吹瓶機(jī).rar鄉(xiāng)林剪臺(tái).rar買(mǎi)書(shū)的隨書(shū)樣例.rar井研磨邊機(jī).rar交通燈注釋全.rar今機(jī)立式注塑機(jī)程序.rar伺服電機(jī)正反轉(zhuǎn)控制.rar位置控制（旋轉(zhuǎn)編碼器與PLC）.rar充磁機(jī)程序.rar先啟后停 后啟先停 事例.rar沖床程序.rar分揀線主機(jī)一個(gè)CJ1M的分揀線程序下掛CP1H.rar利慧利樂(lè)灌裝機(jī)程序.rar刮水器停止位置檢查程序.rar力泰翻胚機(jī)程序.rar北人04印刷機(jī)程序.rar北人LQD10騎馬裝訂程序.rar半自動(dòng)吹瓶機(jī)的程.rar南京印刷機(jī).zip卡板程式.rar壓制機(jī)程序（帶解釋，注釋）.rar壓力機(jī)控制程序.rar原創(chuàng)液壓機(jī)程序帶注釋歐姆龍PLC加信捷文本.rar原點(diǎn)搜索程序.rar雙翻分揀機(jī).rar雙邊機(jī).rar反滲透整套PLC控制.rar臺(tái)灣產(chǎn)染色機(jī)歐姆龍PLC帶3只IO擴(kuò)展控制程序.rar臺(tái)灣大拉無(wú)板.rar啤酒廠酒瓶美容機(jī).rar四川綿陽(yáng)建豐熱磨工段.rar在用設(shè)備程序.rar垂直涂布.rar外端子設(shè)計(jì)數(shù)值.rar大型熱電廠 PLC程序(帶注解).rar大搖動(dòng)超聲波清洗機(jī).rar大連75密練注釋程序.rar安呼12級(jí).rar富佳扶梯程序.rar對(duì)齊度編程！！.rar小車控制程序.rar小車送料”例程.rar廣東鍛壓氣壓沖床程序（80T）有詳細(xì)注解.rar廣告牌燈箱.rar微電機(jī)刷簧自動(dòng)組裝程序.rar微粉磚自動(dòng)送料帶OMRON CQM2A+擴(kuò)展程序帶注釋.rar意大利進(jìn)口皮革壓花.rar扎鋼機(jī)程序.rar打包機(jī).rar拔蓋機(jī).rar撥碼控制.rar擋磚磨邊機(jī)（新1）.rar捷豹空壓機(jī)控制程序.rar接木機(jī).rar控制程序例子.rar推掛.rar攻絲機(jī)2（新）.rar料位顯示.rar旋轉(zhuǎn)門(mén)控制程序1.rar無(wú)協(xié)議.rar無(wú)心磨床(OMRON系統(tǒng),帶機(jī)械手有詳細(xì)注解).rar無(wú)線膠裝機(jī)歐姆龍程序.zip日本人編的程序 拋光研磨.rar日本成型磨床控制程序（附注釋）歐姆龍CPM1A.rar板坯定厚.rar樣例，有注釋.rar模擬量試驗(yàn).rar歐姆龍CJ1M鉻化機(jī)程序帶注釋.rar歐姆龍CP1H例程.rar歐姆龍CPM1A的PLC.rar歐姆龍CPM2AH PLC和歐姆龍NTZ觸摸屏編寫(xiě)的超聲波清洗機(jī)程序..rar歐姆龍CPM2AH Host Link通訊程序(發(fā)布源碼).rar
上傳時(shí)間： 2021-10-22
上傳用戶：
基于TMS320F2812 光伏并網(wǎng)發(fā)電模擬裝置PROTEL設(shè)計(jì)原理圖+PCB+軟件源碼+WORD論文文檔,硬件采用2層板設(shè)計(jì)，PROTEL99SE 設(shè)計(jì)的工程文件，包括完整的原理圖和PCB文件，可以做為你的學(xué)習(xí)設(shè)計(jì)參考。 摘要：本文實(shí)現(xiàn)了一個(gè)基于TMS320F2812 DSP芯片的光伏并網(wǎng)發(fā)電模擬裝置，采用直流穩(wěn)壓源和滑動(dòng)變阻器來(lái)模擬光伏電池。通過(guò)TMS320F2812 DSP芯片ADC模塊實(shí)時(shí)采樣模擬電網(wǎng)電壓的正弦參考信號(hào)、光伏電池輸出電壓、負(fù)載電壓電流反饋信號(hào)等。經(jīng)過(guò)數(shù)據(jù)處理后，用PWM模塊產(chǎn)生實(shí)時(shí)的SPWM 波，控制MOSFET逆變?nèi)珮蜉敵稣也ā１疚挠肞I控制算法實(shí)現(xiàn)了輸出信號(hào)對(duì)給定模擬電網(wǎng)電壓的正弦參考信號(hào)的頻率和相位跟蹤，用恒定電壓法實(shí)現(xiàn)了光伏電池最大功率點(diǎn)跟蹤（MPPT），從而達(dá)到模擬并網(wǎng)的效果。另外本裝置還實(shí)現(xiàn)了光伏電池輸出欠壓、負(fù)載過(guò)流保護(hù)功能以及光伏電池輸出欠壓、過(guò)流保護(hù)自恢復(fù)功能、聲光報(bào)警功能、孤島效應(yīng)的檢測(cè)、保護(hù)與自恢復(fù)功能。系統(tǒng)測(cè)試結(jié)果表明本設(shè)計(jì)完全滿定設(shè)計(jì)要求。關(guān)鍵詞：光伏并網(wǎng)，MPPT，DSP Photovoltaic Grid-connected generation simulator Zhangyuxin，Tantiancheng，Xiewuyang(College of Electrical Engineering, Chongqing University)Abstract: This paper presents a photovoltaic grid-connected generation simulator which is based on TMS320F2812 DSP, with a DC voltage source and a variable resistor to simulate the characteristic of photovoltaic cells. We use the internal AD converter to real-time sampling the referenced grid voltage signal, outputting voltage of photovoltaic, feedback outputting voltage and current signal. The PWM module generates SVPWM according to the calculation of the real-time sampling data, to control the full MOSFET inverter bridge output sine wave. We realized that the output voltage of the simulator can track the frequency and phase of the referenced grid voltage with PI regulation, and the maximum photovoltaic power tracking with constant voltage regulation, thereby achieved the purpose of grid-connected simulation. Additionally, this device has the over-voltage and over-current protection, audible and visual alarm, islanding detecting and protection, and it can recover automatically. The testing shows that our design is feasible.Keywords: Photovoltaic Grid-connected，MPPT，DSP 目錄引言 11. 方案論證 11.1. 總體介紹 11.2. 光伏電池模擬裝置 11.3. DC-AC逆變橋 11.4. MOSFET驅(qū)動(dòng)電路方案 21.5. 逆變電路的變頻控制方案 22. 理論分析與計(jì)算 22.1. SPWM產(chǎn)生 22.1.1. 規(guī)則采樣法 22.1.2. SPWM 脈沖的計(jì)算公式 32.1.3. SPWM 脈沖計(jì)算公式中的參數(shù)計(jì)算 32.1.4. TMS320F2812 DSP控制器的事件管理單元 42.1.5. 軟件設(shè)計(jì)方法 62.2. MPPT的控制方法與參數(shù)計(jì)算 72.3. 同頻、同相的控制方法和參數(shù)計(jì)算 8
標(biāo)簽： tms320f2812 光伏 并網(wǎng)發(fā)電 模擬 protel pcb
上傳時(shí)間： 2021-11-02
上傳用戶：
5G移動(dòng)通信網(wǎng)絡(luò)關(guān)鍵技術(shù)綜述.pdf陳 婧，韓遠(yuǎn)兵，徐 川 (重慶郵電大學(xué)未來(lái)網(wǎng)絡(luò)研究中心 重慶 400065) 摘 要: 為適應(yīng)未來(lái)海量移動(dòng)數(shù)據(jù)的爆炸式增長(zhǎng)，加快新業(yè)務(wù)新應(yīng)用的開(kāi)發(fā)，第五代移動(dòng)通信( fifth generation mo- bile communication network，5G) 網(wǎng)絡(luò)應(yīng)運(yùn)而生。目前，國(guó)內(nèi)外已經(jīng)逐漸明確了 5G 的愿景和需求，如何將現(xiàn)有技術(shù)和 多種潛在的新技術(shù)進(jìn)行融合以實(shí)現(xiàn) 5G 網(wǎng)絡(luò)成為下一步的研究與發(fā)展重點(diǎn)。面向未來(lái) 5G 的技術(shù)發(fā)展，介紹 5G 的 概念、應(yīng)用場(chǎng)景以及終端用戶對(duì) 5G 的相關(guān)需求; 然后，重點(diǎn)闡述 5G 在無(wú)線網(wǎng)絡(luò)方面具有發(fā)展前景的 10 大關(guān)鍵技 術(shù)，包括: 超密集異構(gòu)網(wǎng)絡(luò)、自組織網(wǎng)絡(luò)、D2D( device-to-device) 通信、M2M( machine-to-machine) 通信、軟件定義無(wú)線 網(wǎng)絡(luò)、
標(biāo)簽： 5G 移動(dòng)通信
上傳時(shí)間： 2022-02-25
上傳用戶：zhaiyawei
隨著光伏發(fā)電系統(tǒng)快速發(fā)展,以及電動(dòng)汽車充電樁的普及,傳統(tǒng)的剩余電流保護(hù)器無(wú)法滿足實(shí)際需求。介紹了一款B型剩余電流保護(hù)器,采用磁調(diào)制剩余電流互感器和零序電流互感器采集剩余電流。根據(jù)GB/T 22794—2017標(biāo)準(zhǔn)要求,可識(shí)別1 kHz及以下的正弦交流、帶和不帶直流分量的脈動(dòng)直流、平滑直流等剩余電流信號(hào)。經(jīng)信號(hào)調(diào)理電路將電壓信號(hào)送到單片機(jī)進(jìn)行采集和判斷。通過(guò)試驗(yàn)測(cè)試,該樣機(jī)在測(cè)試精度和速度上均符合國(guó)家標(biāo)準(zhǔn)的相關(guān)要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
標(biāo)簽： 電流保護(hù)器
上傳時(shí)間： 2022-03-27
上傳用戶：
為了提高超高頻RFID系統(tǒng)中閱讀器在低信噪比的情況下仍具有較高的識(shí)別能力,提出一種基于FPGA系統(tǒng)結(jié)合軟件無(wú)線電方法實(shí)現(xiàn)超高頻RFID射頻前端電路方案。超高頻射頻識(shí)別系統(tǒng)必須符合EPC Class 1generation 2標(biāo)準(zhǔn),所設(shè)計(jì)的電路系統(tǒng)以Xilinx公司的XC6SLX16-2CSG324FPGA芯片為硬件基礎(chǔ),將數(shù)字基帶調(diào)制解調(diào)和中頻濾波電路在FPGA系統(tǒng)中設(shè)計(jì)實(shí)現(xiàn),重點(diǎn)闡述了射頻前端電路的設(shè)計(jì)結(jié)構(gòu)、AD/DA轉(zhuǎn)換電路,以及數(shù)字濾波器的設(shè)計(jì)。實(shí)驗(yàn)結(jié)果表明,所設(shè)計(jì)的超高頻RFID閱讀器簡(jiǎn)化了前端電路系統(tǒng)結(jié)構(gòu),提升了穩(wěn)定性,增強(qiáng)了抗干擾能力。該電路系統(tǒng)在信噪比較低的情況下,能夠較好地實(shí)現(xiàn)915MHz頻率的射頻接收和發(fā)送。In order to improve the reader UHF RFID system still has a higher ability to identify,in the case of low signal-to-noise ratio.The UHF RFID systems must comply with EPC Class 1 generation 2 standard.In this paper,the design of the circuit system based on Xilinx＇s XC6SLX16-2CSG324 FPGA chip,and presents UHF RFID RF front-end circuit with software radio based on FPGA system.Digital baseband modem and IF filter circuit is designed and implemented in the FPGA system,and focused on designing the structure of the RF front-end circuit,AD/DA conversion circuits,and digital filter.Experimental results show that the UHF RFID reader de...
標(biāo)簽： 915mhz 超高頻 rfid 閱讀 射頻 前端 電路 設(shè)計(jì)
上傳時(shí)間： 2022-04-17
上傳用戶：shjgzh
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