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基于MCU的网络家电_电气工程论文范文_电气工程论文
电气工程论文 摘要：网络家庭已成为公认的下一个网络革命前沿目标，消费电子技术与Internet的交叉结合将会改变人们的生活方式，网络化家电将融入我们未来的生活。随着计算能力和网络技术的不断进步，全自动化的智能家电的普及已不是可望不可及。不久的将来，我们生活中的所有电器将能够互联并接入Internet。本设计的网络家电除了能在局域网内控制外，最重要的是能在互联网上控制，而且在通用的电脑上可以不用再安装软件，只要通过浏览器就能达到方便控制的目的。本文比较综合的描述了整个设计主要涉及的知识和开发的整个流程，并提供了解决动态IP的方案。相信在不久的将来，网络家电将像现在的电话一样迅速进入普通家庭。 关键词：以太网；嵌入式；TCP/IP；LPC2210 Abstract：Family Network has become a recognized under the forefront of the network revolution, Consumer electronic technology and the Internet will combine cross-change people's way of life, Networked home appliance will be integrated into our future life. With computing power and network technology progresses, the fully automated intelligent appliance is not universal and elusive. The near future, we live in all electrical appliances which will be able to access the Internet and the Internet. The design of the network home appliances in addition to LAN control, the most important thing is to control in the Internet. In the general computer without installing software, we will be able to achieve the convenience of control across the browser. This paper describes a integrated design of the whole mainly involve the knowledge and the development of the entire process, and to provide a dynamic IP address of the program. I believe in the near future, Network Appliance will quickly go into ordinary families as the telephone. Keywords： Ethernet； Embedded；TCP/IP；LPC2210
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电梯LED照明恒流源控制系统_电气工程论文范文
电气工程论文 摘要：在当前全球能源短缺背景下，节约能源是我们面临的重要的问题。在照明领域，这种具有高节能、寿命长、多变换、环保的LED发光产品的应用正吸引着世人的目光。LED作为一种新型的绿色光源产品，必然是未来发展的趋势。二十一世纪将进入以LED为代表的新型照明光源时代。LED照明的应用离不开它所需要的驱动控制电路，通过驱动电路来获得良好而平稳的电流，使LED照明更加稳定，满足各种场合的应用要求，同时可以延长LED的使用寿命。 本文介绍了一种用于提高LED光源稳定性的高精度恒流源控制系统, 该系统基于STC单片机设计, 由BUCK电路、BOOST电路、6V蓄电池充电电路和电压放大电路组成。除此之外，该系统还配备一个6V蓄电池作为应急备用电源。软件中采用多层分段控制策略。该系统输出10路恒定电流30mA,恒流精度达到±1mA。 关键词: 发光二极管；稳定性；恒流源 Abstract:In the current background of global energy shortages, energy conservation is the important issue we face. In the area of lighting, the application of LED products which has the advantage of high power conservation, long life, multi-transformation, environmental are attractive to the world's attention .As a new green lighting products, LED is the trend of development in the future .We Will enter a new lighting era which is represented by the LED in the 21st century. LED drivers are necessary in the application of LED lighting. They can supply constant output current and make the LED light even, and also can make the LED’s life longer. In this paper, we introduce the high-precision constant current source control system which can enhance the stability of the LED lighting source. The system is based on the STC single-chip processor, consists of the Buck circuit, and the BOOST circuit, and the rechargeable circuit of 6V batteries, and voltage amplifier circuit. In addition, the system is also equipped with a 6V battery power as an Emergency Backup Power. Multi-section control strategy is used in the software. This system outputs 10 channels of 30mA constant current, and constant current accuracy reaches ± 1mA. Key words: LED；stability；constant-current source
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智能信息终端开发（软件）
目 录 摘 要I AbstractII 1 绪 论1 2 系统总体方案设计2 2.1 系统总体结构2 2.1.1 系统总体设计的目的2 2.1.2 系统总体设计的思路2 2.2 系统主要硬件描述3 2.2.1 控制单片机——MSP430F235的简要介绍3 2.2.2 MSP430的特点以及独特的低功耗原理3 2.2.3 U盘读写模块——PB3755 2.2.4 240128液晶显示原理及特性9 2.2.5 W32-SN简要使用说明11 3 系统硬件设计13 3.1 部分系统硬件设计原理图13 3.1.1 PB375U盘读写部分13 3.1.2液晶显示部分14 3.2 系统部分硬件设计实物图15 4 系统软件设计16 4.1 C++语言16 4.2 系统软件设计的基本思路17 4.3 U盘发送程序设计17 4.4 MSP320主程序设计18 4.5 液晶显示程序设计19 4.6 热敏打印机程序设计20 5 结 论21 致 谢22 参考文献23 附 录 源程序代码24 摘 要 世界各国政府尤其是发达国家把居民消费问题作为经济建设的重要课题。我国面临的局面更为复杂，要提高我国居民消费水平就必须发展快捷购物，改变人们购物方式，使购物方式进入一个崭新的发展模式。购物是城市消费的一个重要组成部分，商场运行管理智能化、人性化是提高公交服务水平的基础，也是提高运营效率、改善居民消费与商场管理的必要手段，体现了一个城市的现代化交通管理水平，是中国解决消费问题的重要措施之一。单片机技术的快速发展，特别是新型液晶、U盘读写模块和微型打印机的投入使用以及各种编程语言的发展，为智能购物的发展提供了充分的条件。 本文介绍智能信息终端开发方面，采用MSP430单片机、240128液晶和PB375U盘模块等器件，利用Visual C++程序编程，来实现单片机、U盘、液晶及热敏打印机之间的功能显示。 基于商场智能信息终端机的出现，为购物者提供优惠商品、动态实时信息服务，通过终端机读卡识别、现场查询、显示、自助打印等功能，构建一个面向各种出行者的综合性城市商品信息服务系统，及时准确地提供各种商品及消费服务，满足社会对商品信息服务的需求，它在今后的商业领域中也将产生巨大的作用。 关键词：单片机；液晶显示；PB375模块；VC++ Abstract The various countries government developed country expends the resident the question to take particularly the economic development the important topic. Our country faces the aspect is more complex, must raise our country resident consumption level to develop the quick shopping, changes the people shopping way, causes the shopping way to enter a brand-new development model. The shopping is a important component which the city expends, the market operational guidance intellectualization, user-friendly is raises the public transportation service level the foundation, is also raises the operation efficiency, to improve the resident expense and the market management essential method, has manifested an urban modernization traffic control level, is China solves one of expense question important measures. The monolithic integrated circuit technology's fast development, specially the new liquid crystal, the U plate read-write module and miniature printer's being operational as well as each kind of programming language's development, has provided the full condition for the intelligent shopping's development. This article introduced that the intelligent information terminal development aspect, uses components and so on MSP430 monolithic integrated circuit, 240128 liquid crystals and PB375U plate module, uses Visual the C++ procedure programming, realizes between the monolithic integrated circuit, the U plate, the liquid crystal and the hot sensitive printer's function demonstration. Based on the market intelligence information terminal's appearance, provides the preferential benefit commodity, the dynamic real-time information service for the purchaser, reads functions and so on card recognition, scene inquiry, demonstration, self-service printing through the terminal, constructs one face each kind of journey comprehensive urban commodity information service system, provides each kind of commodity and the expense service accurately promptly, satisfies the society to the commodity information service demand, it will also have the huge function in present's commercial domain. Key words: Monolithic integrated circuit; Liquid crystal display; PB375 module; VC++
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自动气压机控制系统的设计_电气工程论文范文
电气工程论文 摘要：在工业生产中，自动气压机的自动与速度发挥了巨大的作用和实际效益，此次设计基于改公司购买的气压机靠手动操作，效率低，操作人员工作强度高，并且无法控制产品是否合格，对整个洗衣机离合器的质量造成影响。因此对气压机进行改进，改进后使粉围轴承压入壳体盖，保证在压力范围内压入，大大的提高了工作效率，最主要是保证了压合的力在设定范围内，保证了产品的可靠性。可编程序控制器产生于二十世纪六十年代，经过几十年的发展，已成为以微处理器为核心，综合微电子技术、自动化技术、网路通信技术于一体的通用工业控制装置。它可靠性高、使用方便、性能价格比高。从世界范围来看，PLC是用的最多、应用范围最广的自动化产品，也可以说是最实用的自动化产品。本设计是PLC在电机控制方面的一个应用，因为用PLC来实现自动有很多优点，可使系统的硬件设备大为简化，体积减小，而且PLC的抗干扰能力强，可靠性高，操作维护简单。 关键词：PLC；自动气压机；西门子S7-200 Abstract:In industrial production, automatic air pressure machine and the automatic speed played a huge role and real benefits Based on the current design of the companies buying pressure on manually operated machines, inefficient and high-intensity work, and unable to control whether a product passes, the whole Clutch have affected the quality. So the pressure for improvements, improvements have enabled powder Wai bearings pressed into the shell cover, and ensure that the pressure within the indentation, greatly increase the efficiency of its work, the most important is to ensure that the bond strength at the set point, ensuring the reliability of the product. PLC have in the 20th century the 1960s, after decades of development, has become a microprocessor to the core, integrated microelectronics technology, automation technology, network communications technology in the integration of common industrial control devices. Its high reliability, easy to use, high performance-cost ratio. On a worldwide scale, PLC is the largest, most extensive scope of application of automation products, can be said to be the most practical automation products. The design of the PLC in the electrical control of an application, because the PLC to automatically have a lot of strengths, The system will greatly simplify the hardware and the volume was reduced, and PLC anti-interference capability, high reliability, operation and maintenance simple. Keywords：PLC；Automatic Pressure Machine；Siemens S7-200
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交流异步电机的调速仿真
目录 摘要I AbstractII 1 前 言1 2 三相异步电机变频调速3 2.1 从额定频率向下调速4 2.2 从额定频率往上调6 3 三相异步电机串电阻调速8 4 定子调压调速方法11 5 基于Matlab的异步电动机矢量控制系统的仿真14 5.1 电力系统模块库的运行机理和应用14 5.2 异步电动机矢量控制原理14 5.5 异步电机转差型矢量控制系统仿真22 6 结 论25 致 谢26 参考文献27 摘要 在分析交流异步电机数学模型的基础上，提出了交流异步电机控制系统仿真建模的新方法。在Matlab/Simulink 中，建立独立的功能模块，如电机本体模块、矢量控制模块、速度控制模块、电流滞环控制模块等，再进行功能模块的有机整合，搭建交流异步电机控制系统的仿真模型。系统采用双闭环控制：速度环采用PI 控制，电流环采用电流滞环控制。仿真结果证明了该方法的合理性、有效性，为实际电机控制系统的设计和调试提供了新的思路。因其结构简单、可靠性高、性能优良、输出转矩大等特点，交流异步电机应用广泛，且随着交流异步电机应用领域的不断拓宽，对电机控制系统的设计要求越来越高，既要考虑成本低廉、控制算法合理，又需兼顾控制性能好、开发周期短等特点。因此，如何建立有效的交流异步电机控制系统的仿真模型成为电机控制算法设计人员迫切需要解决的关键问题。 关键词：交流异步电机；仿真建模；Matlab；矢量控制 Abstract Based on the mathematical model of AC asynchronism motor, a novel method for modeling and simulation of AC asynchronism motor control system in Matlab has been proposed. In Matlab/Simulink, the independent functional blocks, such as Moter model block, Vector control block, Speed controller block, and Hysteresis current controller block etc, have been modeled. By the organic combination of these blocks, the model of control system can be established easily. In the double loop of control system, a PI controller is adopted in the speed loop and a hyteresis current controller is adopted in the current loop. The reasonability and validity have been testified by the simulation results and this novel method offers a new thought way for designing and debugging actual motors. Keywords: AC asynchronism motor; modeling and simulation; Matlab; vector control
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基于DirectShow的网络音视频通信系统的开发
目录 摘 要I AbstractII 前 言1 1 DirectShow简介2 1.1 COM基础2 1.1.1 COM组件标准2 1.1.2 COM组件类型3 1.2 DirectShow体系结构3 1.3 DirectShow的 Filter4 1.3.1 注册Filter5 1.3.2Filter的媒体类型5 1.3.3 连接Fliter6 1.3.4 Filter重组6 1.3.5 数据传输8 1.4关于Filter Graph Manager10 1.5 GraphEdit的使用10 2 音视频编码标准13 2.1 MPEG系列编码13 2.1.1 MPEG-213 2.1.2 MPEG-414 3 网络传输协议18 3.1网络协议18 3.1.1TCP/IP协议18 3.1.2 UDP协议19 3.1.3 UDP协议的特性20 3.1.4 TCP协议和UDP协议的区别21 3.2 Socket介绍22 3.2.1常用的Socket类型22 4 音视频系统开发23 4.1 Filter组件的开发23 4.1.1VC环境设置23 4.1.2 创建工程以及Filter的入口函数24 4.1.3 实现Filter 的类厂对象26 4.1.4 实现自己的 Filter28 4.1.5 开发Filter需要的条件30 4.2 DirectShow应用开发32 4.2.1 开发环境的配置32 4.2.2 Filter Graph Manager接口32 4.2.3创建 Filter Graph Manager接口33 4.2.4创建 Filter Graph34 4.2.5使用 DirectShow的事件响应机制34 4.3音视频系统开发35 4.3.1实现原理35 4.3.2开发网络发送、接收Filter38 4.3.3设备自检40 4.3.4角色控制40 5总结42 致 谢43 参考文献44 摘 要 个人电脑和各种网络电子产品（手提电脑、智能手机、MP4等）的空前繁荣伴随着因特网的普及，使得流媒体在网络上的广泛应用，于是流媒体处理的复杂性和技术性使怎样处理流媒体变得简单而富有成效逐渐成为了焦点问题。选择一种合适的应用方案处理媒体流，事半功倍。微软的DirectShow给了我们一个不错的选择。DirectShow是微软公司提供的一套在Windows平台上进行流媒体处理的开发包，与DirectX开发包一起发布。 DirectX是一套基于Windows平台的编程接口,它能出色的完成高速的实时动画渲染、交互式音乐和环境音效、高效多媒体数据处理等一般API很难完成的任务。 DirectShow为在Windows平台上处理各种格式的媒体文件的回放、音视频采集等高性能要求的多媒体应用，提供了完整的解决方案。 多媒体应用开发所面临的众多挑战：需要高效的处理巨大的数据量，音频和视频时刻保持同步，还需用简单的方法处理复杂的媒体源问题，还需处理各种各样不同的媒体格式，支持系统中不可预知的硬件等。 Directshow的设计初衷就是尽量要让应用程序开发人员从复杂的数据传输、硬件差异、同步性等工作中解脱出来，总体应用框架和底层工作由Directshow来完成，这样，基于Directshow框架开发多媒体应用程序就会变得非常简单。 关键词 DirectShow; 流媒体; 音视频; API Abstract along with the popularity of Internet,personal computers and networks of electronic products (laptops, smart phones, MP4, etc.) become unprecedented prosper, so streaming media is on the network everywhere，which makes how to deal with easy and effective streaming media a focal point，with extensive use of streaming media handling the complexity and technical nature. Selecting an appropriate media stream processing applications is more efficiently. Microsoft's DirectShow, gives us a good choice. DirectShow provides a set of the development of streaming media processing package on Microsoft Windows platform, released with DirectX SDK. DirectX is a Windows-based platform programming interface, it can outstanding in completing the high-speed real-time animation rendering, interactive music and environment sound, efficient processing of multimedia data, which the general API is difficult to accomplish. DirectShow provides a complete solution for handling playback of various formats of media file , multimedia applications of high-performance requirements such as capturing audio and video on Windows platform. Multimedia application development faces many challenges: the need for efficiently handling of huge amount of data, audio and video time synchronized, a simple way to deal with the complex issue of media source, also need to address a variety of different media formats, support unpredictable hardware in system. Directshow is designed is to try to let the application developer freed from the complexity of the data transmission, hardware differences, synchronization, the general application framework and the underlying work to be completed by the Directshow, so the development of multimedia applications based on Directshow framework becomes very simple. Keywords DirectShow ; streaming; audio and video; API
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电力地理信息系统的开发与应用_电气工程论文范文
电气工程论文 目录 摘要3 Abstract4 1.绪论7 1.1目的和意义7 1.2国内外配电地理信息系统发展现状8 1.3规划建设电力地理信息系统的必要性、可行性9 2.地理信息系统11 2.1地理信息系统GIS及其特点11 2.2电力地理信息系统及其特点13 3. 电力地理信息系统的设计16 3.1系统设计机理16 3.2系统软件特性17 3.3系统平台18 3.3.1系统平台选择18 3.3.2系统平台确定21 3.4 PowerGIS 简介22 3.5 数据采集23 3.5.1 GPS简介23 3.5.2 数据具体采集25 4. 高陵县电力局地理信息系统26 4.1高陵县电力局简介26 4.2 系统概述26 4.3 系统应能实现的功能27 4.3.1图资管理29 4.3.2图形显示30 4.3.3查询统计31 4.3.4输配电生产管理33 4.4.系统的维护管理35 4.5 高陵系统所采集的数据36 4.5.1配电线路37 4.5.2应采集的具体电器设备数据37 4.6 GIS技术在配网管理中的应用41 5.总结43 致谢44 参考文献45 摘要 随着国民经济的飞速发展，电力用户对电力的需求在不断的提高，城乡电网也在迅猛发展。以往那种主要靠图纸和配电人员的工作经验对配电线路进行管理和维护的方法，不仅显得落后，而且严重影响了工作效率。如何用先进的管理方法来替代在电力生产中传统的低效、烦琐的手工管理模式，使电力建设和管理进一步高效化、自动化、科技化，越来越受到人们的重视。随着信息产业的迅猛发展，特别是计算机技术的广泛地应用，为配电线路管理模式的改变提供了可能。 在电力系统配电线路的设备管理中，需要处理大量的设备数据和图纸，这些数据和图纸均和地理位置密切相关。本文针对高陵县配电网管理现状与需求，运用地理信息系统(Gls)和卫星定位系统(GPS)先进技术，完成了配电网地理信息系统的设计与实现。它主要的功能就是利用计算机在地理信息系统上进行有关图纸和文件的管理，并可及时、准确、完整地提供出电力部门所需要的各类管理信息。此系统的建成不但对电力安全生产起到了有力的保障，同时对线路的科学规划等提供了辅助决策的功能。 本文主要介绍了电力地理信息系统的基本概念、发展历史、发展趋势、功能特点。高陵县电力局相关信息，根据其需求提出系统要能实现的功能。电力地理信息系统的开发是一项复杂的工程，本文还从软件工程学的角度对其进行了设计。根据这些问题，提出了电力地理信息系统的基本目标。在此基础上，进行了系统的方案设计，包括GIS平台选型、GIS平台与应用系统的集成方式、系统的体系结构，采用美国天宝公司的Juno ST GPS仪，测量所辖9个变电站的地理信息，记录了配电线路的相关数据信息。 关键词：地理信息系统、电力地理信息系统、GPS、系统平台、数据采集 Abstract With the national economy rapidly developing，the eonsumers’demand for electri一city is higher，so the power distribution network is being expanded and improved on alarge scale in the city and rural country. The managing and maintaining method to power distribution network，which is mainly dependant on the drawings and the work experience for the distribution network，s old full time staff，notonly looks backwards but also affeets working efficiency heavily .How to make the electrieal construction and management be highly efficient，automatic，scientiflc further and use advaneed management method to replace the old manual kind of management which is not efficient and trivial ，that is payed attention by many people concerned more and more.At preseni ，the information industry are violently developing,especially computer technology which provides the possibility to reform the management model of the electricald is tribution network. In the equipment imanagement of the power distribution network system，which is needed to proeeed more equipment data and drawings which are connected with geographical information . The paper presentis GaoLing County practieal system design of the power Distribution Network GIS System and GPS technologies and tools etc. It，s main function is using computers to manage the specific drawings and files on GIS，which can provide all kinds of management information for the electricalde partment timely，accurately and completely. The system that is builded is not only powerful enough to guarantee electrical safety production but also provides the basis of auxiliary decisions for the power distribution network，s Program scientificly. This text main introduction Power GIS, development history, development trend, function characteristics.The related information of Gao Ling county electric power bureau, put forward system according to its need have to the function of realization. Because to develop Power GIS is a sophisticated engineering, the design of P Power GIS here is concentrated on software project only. This paper analyzes the problem existing in medium-small power-supply bureaus and advances the fundamental purpose of the Power GIS, then presents structure design including the type selection of GIS platform, the integration mode of GIS software platform with applied system, and the structure of system。Adoption the Trimble GPS Juno ST measure 9 transformer substation govern of geography information, record go together with the related data information of electric wire road.
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直流断路器安秒特性测试系统软件开发
目 录 摘要II AbstractIII 1 绪论1 1.1 研究背景1 1.1.1 直流断路器的发展概况1 1.1.2 断路器的现状概况5 1.1.3 直流断路器原理6 1.1.4 断路器测试软件概况7 1.2研究任务与目标7 2 基于VC++开发串口通信的方法8 2.1 串口通信的工作原理8 2.2 串口通信实现的简介15 2.2.1 采用MFC串口通信编程16 2.2.2 采用ActiveX控件 (MScomm控件)编程24 2.2.3 利用VC＋＋运行时库的标准通信函数实现串口编程28 2.3 串口通信实现的总结28 3 开发软件Visual C++相关30 3.1 Visual C++ 6.0的开发环境简介30 3.1.1 Visual C++ 6.0的用户界面简介30 3.1.2 MFC的结构和向导工具的使用31 3.1.3 MFC编程31 3.1.4 创建基于对话框的应用框架31 4 直流断路器安秒测试软件的设计与完成33 4.1 直流断路器安秒测试软件要求33 4.2 串口通信的设置与实现33 4.2.1 通信协议33 4.2.2 设置串口相关工作34 4.2.3 读串口操作36 4.2.4 写串口操作38 4.3 读取断路器断开时间39 4.4 绘制图形43 5 软件使用44 5.1 测试前准备44 5.2 测试界面描述44 5.3 测试方法45 5.4 注意事项47 5.5 异常情况处理47 总结48 致谢49 参考文献50 摘要 直流断路器主要由接线柱、灭弧栅、标签显示器、操作手柄、动触头、电磁线圈等部件构成，在直流断路器内部结构中，“电磁线圈”是直流断路器的快速动作元件。当负载短路时，产生的短路电流通过电磁线圈产生电动力使断路器瞬间动作。“双金属条”是过载保护动作元件，当负载电流大于额定电流某一定值时，双金属条围绕在其上的电阻丝发热，金属条弯曲动作起到过载保护目的。 本课题就是对直流断路器安秒测试软件的一项设计，是在Microsoft Visual C++6.0开发环境中编出一个程序，使得通过对直流断路器施加不同倍数额定电流来测试断路器的脱筘时间，测试系统分为单点测试（每次测试一个电流比值），多点测试（连续测试多个电流比值）和级差测试（多个断路器级联测试），同时绘制出测试安秒曲线。 论文介绍了直流断路器的资料，MFC编程，在Visual C++下的串口通信，课题设计中所运用到的Visual C++6.0及其开发调试环境。 关键词 直流断路器；Visual C++；串口通信；MFC编程 Abstract DC circuit breaker mainly consists of terminals, arcing, label display, handles, contactor, magnetic coil etc, i the internal structure of dc circuit breaker, "magnetic coil is rapid movement of dc circuit breaker. When the load is short-out, short-circuit current through the magnetic coil to generate electricity power to course breaker act instantly. Dual metal bar is overload protection movement components, when load current is more than a certain value of rated current, the resistance wire arcund the dual metal get hot,metal bending action has satisfied the purpose of overload protection. The second test software procedure of DC circuit breaker in Microsoft Visual C++6.0 development environment is the subject of designed the DC circuit breaker imposed by different multiples of rated current to test the time of circuit breakers off, the test system is divided into single-point test (each test a current ratio), multi-point test (for testing a number of current ratio) and differential test (number of circuit breakers cascade testing), at the same time draw curve seconds. This paper introduces a DC circuit breaker, MFC Programming，the serial communications under the Visual C++, the subject applied to the design of the Visual C++6.0 and its development environment for debugging Keywords： DC circuit breakers; Visual C + +; serial communication；MFC Programming
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电力参数监控仪测控电路研发_电气工程论文范文
电气工程论文 摘要：科学技术突飞猛进的今天，生产力不断的发展，无线、远程、精确、小型化、智能化引领着科技发展的方向。在配电屏配电等生产实践中，对电力参数实时监控的快速、精确要求越来越高，并向无线远程化发展。所以有必要对这一方面做些研究。研究的成果可以解决一些生产上的问题，提高生产效率，降低人工成本，提高生产自动控制程度。 本文主要介绍了基于DSP2407的电力参数监控仪测控电路的研制，包括数据采集、快速傅立叶变换、液晶显示和数据传输等各部分的软硬件设计。本系统的硬件设计，采用模块化的设计思想，并尽可能的采用高性能集成电路，简化了电路设计并提高了可靠性。在软件设计中采用了自顶向下的设计思想，所有程序采用分层次模块化设计，提高了软件的可移植性。本系统运行稳定可靠，相信能很好的运用到实际生产中。 关键词：电力参数监控；数字信号处理；快速傅立叶变换 Abstract：Science and technology are advancing rapidly today, and the development of productive forces, wireless, long-range, precision, small, Intelligent technology guides the direction of development. In distribution of power, and other production practice, The demand for real-time monitoring and high accurate of power parameters is getting higher and higher. Wireless Remote to development. There is a need to do research on this matter. The results of the study can solve the problems of production, improve production efficiency and reduce labor costs. production automation. This thesis mairly introduces the parameters of power measured part of the strument based on DSP2407, including data collection, Fast Fourier Transform, liquid crystal display and data transmission. The hardware of system adopts the idea of modular design, it adopts the high-parformance integrated circuits as much as possible ,and jredigests circuits design and improves reliability .The software design ,using in the top-down design ideas, all the procedures used hierarchical modular design, improving the portability of the software. The system is stable and reliable, I believe,it can be good used in the production. Key word: Power Parameters Monitoring；digital signal processing；Fast Fourier Transform （FFT）
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基于PSIM的静止无功补偿装置的仿真研究_电气工程论文
基于PSIM的静止无功补偿装置的仿真研究_电气工程论文\ 摘 要 本文详细综述了电力系统静止无功补偿技术的发展现状,分析了各种静止无功补偿技术的原理, 优缺点以及现今在电力系统中的应用情况，重点介绍基于电压源逆变器(VSI)的静止无功发生器(SVG)直接应用PWM控制技术，其具有动态无功功率补偿、稳定节点电压、短时间有功功率补偿等多项先进功能，同时结构紧凑、易于控制、谐波含量小且调节速度快，并且与静止无功补偿器(SVC)进行了性能比较。文中基于瞬时无功功率理论，采用电流的直接控制方法，选择dq0变换法，对无功信号进行快速检测。通过分析其输出无功功率的性质，详细描述其动态工作过程。 应用PSIM仿真软件进行系统仿真,表明基于VSI的PWM型SVG具有良好的动态性能与静态补偿效果,验证了主电路与直接功率控制方式的正确性、优越性与有效性。 关键词：无功补偿、静止无功发生器、系统仿真 目 录 摘要………………………………………………………………………………………….…....I Abstract…………………………………………………………………………...…II 1 绪论……………………………………………………………………………………………1 1.1 研究背景………………………………………………………………………………1 1.2 课题意义、目的和任务………………………………………………………………2 2 静止无功补偿装置的介绍………………………………………………………………...3 2.1 无功功率动态补偿的原理…………………………………………….……………….3 2.2 静止无功补偿器的分类及特点 3 2.2.1 具有饱和电抗器的无功补偿装置(SR)………………………………………...3 2.2.2 晶闸管控制电抗器(TCR)………………………………………………………4 2.2.3 晶闸管投切电容器(TSC)………………………………………………………5 2.2.4 静止无功发生器(SVG)………………………………………………………...6 2.3 SVG与SVC的比较……………………………………………………………...........7 2.4 未来的无功补偿技术和现阶段对无功补偿装置的要求……………………………8 3 SVG动态无功补偿…………………………………........................................................9 3.1 基本原理……………………………………………………………………………....9 3.2 控制方法……………………………………………………………………………...13 3.2.1 电流的间接控制………………………………………………………………14 3.2.2 电流的直接控制 16 3.2.3 两种控制方法的比较…………………………………………………………17 4 无功功率理论与无功电流检测……………………………………………………….18 4.1 无功功率理论及其发展……………………………………………………………...18 4.1.1 传统的无功功率理论………………………………………............................18 4.1.2 瞬时无功功率理论……………………………………………………………18 4.1.3 无功功率理论的研究及其进展………………………………………………20 4.2 无功电流的检测……………………………………………………………………...21 4.2.1 基于瞬时无功功率理论的电流检测方法……………………………………21 4.2.2 基于dp0坐标变换的电流检测方法…………………………........................23 5 基于VSI的SVG系统仿真研究…………………. . .……………………………….26 5.1 PSIM软件简介…………………………………………………………….................26 5.2 系统仿真及分析……………………………………………………………………...27 6 总结…………………………………………………………………………………………31 致谢……………………………………………………………………………………………...32 参考文献…………………………………………………………………………….33 Abstract Development of static var compensation technology in power systems is summarized in detail. Principle, advantages and disadvantages of static var compensation technology are analyzed. It is highlighted that VSI-based SVG using PWM technology which is able to compensate dynamic reactive power,stabilize node voltage and provide real power for a short period of time, has some advantages such as compact structure, simple control, little harmonics and high speed regulation, and has a comparation with static var compensation in performance. Based on instantaneous reactive power theory, this text use a method of direct control of the current , choice of coordinate system dq0 for transformation to rapidly detect the reactive signals. By analyzing the output of the quality of the reactive power,it describes the process of the dynamic working . The SVG system is simulated using PSIM, which shows the excellent dynamic and static performance of the system and proves the correctness and effectiveness of the proposed control scheme. Keywords：var compensation、static var generation、System Simulation
