摘要
针对目前直接功率控制(DPC)的研究主要集中在对开关表的改进上,传统单开关表结构对于有功功率和无功功率控制解耦能力不足和双开关表无法同时调节有功功率和无功功率的问题,本文在分析PWM整流器模型和研究瞬时功率理论的基础上,提出一种新型三状态直接功率控制策略。通过增加一个标示有功功率和无功功率的状态变量细分开关表,增强了系统对于有功功率和无功功率解耦控制和响应能力,提高了整流器的功率因数。仿真和实验结果表明,采用论文提出的三状态直接功率控制策略,网侧输入正弦电流,系统具有更好的瞬时功率动、静态控制特性。
In recent years,the researches about DPC focused on the improvement of the switching table.The single switch table structure of traditional DPC strategy lacked the decoupling control ability of active and reactive power,while the double switching table structure cannot adjust the active and reactive power simultaneously.A new triple-state DPC strategy is presented in this paper to enhance the ability to regulate instantaneous active power and reactive power.In the proposed strategy,a power state variable is added into the traditional switching table to improve the properties of DPC system.The simulation and experimental results verify that,by using the proposed strategy,the grid current is close to sine and the dynamic and static performance of instantaneous active and reactive power control are improved.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第5期208-212,226,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(50977010
51277025)
教育部博士点基金(20120092110041)
江苏省科技支撑计划(BE2011140)资助项目
