一种新型数字式微机励磁控制装置的研究与设计硕士学位

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1、Good is good, but better carries it.精益求精，善益求善。一种新型数字式微机励磁控制装置的研究与设计硕士学位一种新型数字式微机励磁控制装置的研究与设计硕士学位硕士王钧一种新型数字式微机励磁控制装置的研究与设计2012硕士学位论 文 一种新型数字式微机励磁控制装置的研究与设计一种新型数字式微机励磁控制装置的研究与设计摘 要本文在分析国内外励磁控制装置发展现状和关键应用技术的基础上建立了新型数字式微机励磁控制系统。该系统将光伏技术、物联网及现代通信技术与励磁控制装置相结合，具有一定的创新性和前瞻性，其发电机组采用他励方式时， 可由太阳能光伏组件励磁实现电力节能。该

2、装置以NXP 公司32位ARM单片机LPC1768为控制核心，硬件设计部分主要包括电源、时钟与存储、按键与显示等单片机基本外围电路；采样、整流、斩波和触发控制等电路； 232/485和GPRS等通信电路；系统保护和抗干扰电路。软件部分主要实现运行方式控制、采样与计算、励磁控制、通信与存储、综合保护和抗干扰设计等功能，尤其考虑了V/F限制、欠励限制、空载强励限制、过载限制和起励、灭磁控制等保护措施。文中分析和讨论了自动励磁控制算法和交流采样算法，励磁过程可切换积分分离PID控制和线性最优控制两种模式，采样过程则使用64点快速傅里叶算法以提高精度。论文最后通过交流采样、晶闸管移相控制、相位检测、时

3、钟调整和串口通信等实验验证了装置的部分模块的功能并达到了相应技术指标。该装置具有良好的人机界面，硬件扩展性好，软件兼容性强，便于系统升级和更新换代，可以应用于中小型的水电厂和造纸、化工等企业的自备发电机组，具有较广的应用市场。关键词：LPC1768 微机励磁 光伏励磁 GPRS通信 THE STUDY AND DESIGN OF A NEW DIGIT EXCITATION CONTROL EQUIPMENT BY MICROCOMPUTER ABSTRACTIn this paper, the new digital microcomputer-based excitation contro

4、l system base on the analysis of critical applications and development status of domestic and international excitation control devices. The system will be the combination of photovoltaic technology, the Internet of Things, modern communications technology and excitation control devices, innovative a

5、nd forward-looking.Its generator group were excited by solar photovoltaic modules, which could save power energy.The device take NXP 32 bits ARM microcontroller LPC1768 as the control core.The parts of hardware design mainly contain circuits of microcontroller power supply, clock and storage, button

6、s and display; control circuits of sampling, rectifier, chopper and trigger; communication circuits of 232/485 and GPRS; circuits of system protection and anti-jamming. Software design contain the main operation mode control, sampling and calculation, communications and storage, protection and anti-

7、jamming design, especially considering that the V/ F limit,low excitation limit, no-load strong excitation limit, overload limit, start and de-excitation control.This paper analyzes and discusses the automatic excitation control algorithms and sampling algorithms.The excitation process can be switch

8、ed to two modes: the integral separation PID control and linear optimal control, the sampling process is using 64-point fast Fourier algorithm to improve the accuracy. Finally, experiments of sampling, thyristor phase-shift control, phase detector, clock adjustment and serial communication have veri

9、ficated parts function of the device and achieved the appropriate technical indicators.The device has a good human-computer interface, hardware scalability, software compatibility, convenient for system to upgrade and renew.It can be applied to small-sized hydropower plants, paper mill, chemical pia

10、nts and other enterprises owned generator sets, with a more wide application market.KEY WORDS: LPC1768; excitation by microcomputer; excitation by solar photovoltaic; GPRS communication目 录THE STUDY AND DESIGN OF A NEW DIGIT EXCITATIONICONTROL EQUIPMENT BY MICROCOMPUTERI第一章 绪论01.1 论文选题的背景及意义01.2 微机励磁

11、控制器的国内外研究现状01.2.1 国内研究现状01.2.2 国外研究现状11.3 其他新技术的应用与发展11.3.1 太阳能光伏技术11.3.2 物联网技术21.4 微机励磁控制装置的技术发展趋势21.5 本论文的主要内容和章节2第二章 励磁控制原理与算法分析42.1励磁调节原理42.1.1 励磁调节系统组成42.1.2 励磁控制系统功能42.1.3 励磁调节系统的性能要求62.2新型微机励磁调节系统模型62.3 交流采样算法研究72.3.1 基本计算符号与公式说明72.3.2 基本理论算法82.3.3 半周积分算法92.3.4 傅里叶算法102.3.5 本装置采样算法102.4 自动励磁算