抑制电网异常的高电压传输比矩阵变换器-电网技术.PDF

第 34 卷 第 10 期 电 网 技 术 Vol. 34 No. 10 2010 年 10 月 Power System Technology Oct. 2010 文章编号：1000-3673 （2010 ）10-0115-06 中图分类号：TM 464 文献标志码：A 学科代码：470·4031 抑制电网异常的高电压传输比矩阵变换器 李生民，李杨，钟彦儒，孙旭霞 （西安理工大学自动化与信息工程学院，陕西省 西安市 710048 ） High Voltage Transfer Ratio Matrix Converter Capable of Enduring Abnormal conditions in Power Grid LI Shengmin, LI Yang, ZHONG Yanru, SUN Xuxia (School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, Shaanxi Province, China) ABSTRACT: In view of the facts that the voltage transfer 度快、能量双向流动、输入输出功率因数可调、输 ratio of matrix converter is on the low side and its output 出波形谐波含量低等优点[1-3] 。但电路中无直流储能 waveform is sensitive to abnormal conditions in power grid, an 元件，输入侧与输出侧直接相连，也会导致矩阵变 improved uncontrollable modulation strategy for virtual 换器抑制输入电压非正常的能力降低[4-12] ，而且该 rectifier is proposed and the feed-forward compensation algorithm is added into the proposed modulation strategy. By 变换器的电压传输比偏低，难以满足实际传动系统 means of uncontrollable modulation of virtual rectifier and 需要[13-14] 。矩阵变换器传统调制算法在线性调制范 space vector modulation of the virtual inverter, the voltage 围内的最大电压传输比为 0.866[15-16] 。如果采用过 transfer ratio is improved. Through adjusting pulse-width 调制算法提高电压传输比，最大能达到 0.95[17]，但 modulation coefficient of space vector pulse width modulation 存在输出谐波过大的问题。文献[18]提出一种虚拟 (SVPWM), the compensation algorithm suppresses low-order 整流部分采用不可控整流，虚拟逆变部分采用传统 harmonics of virtual DC bus, thus the fluctuation of output voltage can be compensated under abnormal input. Simulation 正 弦 脉 宽 矢 量 调 制 (sinusoidal pulse width results s