基于DSP的SVG装置的设计参考.doc

编号： 　毕业设计(论文)说明书 题 目： 基于DSP的SVG装置的设计 摘 要 伴随着国民经济的高速发展，我国对电能的需求越来越大，于此同时，生产的智能化和自动化对电能质量的要求也越来越严格。近年来，随着电力电子技术的快速发展，低压用户的用电量大幅增长，并且新增了大量电动机、压缩机等旋转设备和电力电子装置等电气负载，因而导致输电线路上无功功率的输送量显著增加。目前，电力系统存在无功功率补偿容量不足，功率因数低，设备容量利用低，且大部分补偿装置补偿手段落后等问题，难以达到满意的补偿效果，因此需要对先进的无功补偿技术和装置进行研究。 首先对静止无功发生器的基本工作原理进行全面地介绍，详细地阐述了瞬时无功功率理论，对静止无功发生器所涉及的关键技术进行了分析。针对静止无功发生器的无功电流电流检测环节，讨论两种基于瞬时无功功率理论的无功电流检测方法：无功电流检测法、无功电流检测法。 针对静止无功发生器的工作原理，对静止无功发生器器的硬件电路进行了设计。建立了一套以TMS320F28335为处理单元的硬件电路，主要包括电流信号采集与调理电路、直流侧电源电路、IGBT驱动电路、A/D转换电路。 最后通过Matlab软件搭建了静止无功发生器的仿真模型，给出了补偿前后电网电流的波形图。同时给出了补偿前后有功功率和无功功率的波形图，分析了不同性质负载下静止无功发生器的补偿性能。最后给出了滞环电流控制和三角载波控制两种控制方法的特点。 理论分析和仿真结果表明了检测算法和控制方法的有效性，可以实现对无功电流的有效补偿，显著地改善了电能质量，具有一定的工程参考和实践应用价值。 关键词：静止无功发生器；Matlab仿真；电流控制；电能质量 Abstract As the rapid development of national economy, our country requires more and power energy. Meanwhile, the intelligence and automation of production also require higher and higher power quality. In recent years, as the fast development of power electronic technology, there is great increment in the number of consumer in low-voltage side, sums of newly increased rotate devices and power electronic equipment, such as electromotor, compressor. All these notably rise the sum of reactive power in transmit line. At present, there are some problems in the network, such as insufficient capacity of reactive power, low power factor, low-usage of compensation devices, poor compensation technology, which is hard to get a content compensation effect, so it is needed to do some research on reactive power compensation technology and compensation device. The SVG basic working principle is introduced, described in detail the instantaneous reactive power theory, the static var generator the involved key techniques are analyzed. According to the static var generator reactive current detection, discuss two based on instantaneous reactive power theory of reactive current detection method: reactive current detection, reactive c