新型矢量单周控制四象限大功率变换器的研究 .pdfVIP

学兔兔 第51卷 第7期 电测与仪表 V01．51 No．7 2014年 4月1O日 Electrical Measurement Instrumentation Apr．10，2014 新型矢量单周控制四象限大功率变换器的研究 杨轶成，丁明进，胡炫，钱诗宝 (国电南京自动化股份有限公司，南京210003) 摘要：对传统矢量单周控制策略进行了改进，通过引进与电网电压同相位的三相虚拟电流与实际负载电流相 加，使得变换器在负载功率不变的情况下系统等效阻抗变大，且恒大于零，实现四象限稳定运行。采用基于瞬 时无功理论的方法对其电流相移补偿抑制，实现大功率变换器的单位功率因数运行及功率因数可调控制。搭 建了一个250kVA仿真模型，进行了仿真实验，验证了以上控制方法的可行性。 关键词：单周控制；虚拟电流；大功率变换器；功率因数可调 中图分类号：TM464 文献标识码：B 文章编号：1001—1390(2014)07—0070—05 Research on the Novel Four—Quadrant High Power Converter with Vector One-Cycle Control YANG Yi—cheng，DING Ming-jin，HU Xuan，QIAN Shi—bao (Guodian Nanjing Automation Co．，Ltd．，Nanjing 210003，China) Abstract：The traditional vector one—cycle control strategy has been improved in this article by introducing the three fictitious currents with the same voltage in power grid being added with the actual load currents，which ensures to ob— tain a lager and positive system equivalent impedance under the condition of convertor loader power unchanging and realize the four quadrant and stable operation．Based on instantaneous reactive theot7 method to suppress the current phase shift compensation，this paper realizes adjustable control on high—power converter power factor of the unit opera— tion and power factor．This paper sets up a 250kVA simulation model for testing the proposed method，and the simula— tion results show the feasibility of this control method． Key words：one—cycle control，fictitious currents，high—power converter，power factor adjustable