具有精确幅值积分特性的正交信号发生器  

Quadrature signal generator with an accurate magnitude integration

作　　者：孙于[1,2] 李雪 耿嘉一[1] 吴尚 SUN Yu;LI Xue;GENG Jia-yi;WU Shang(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300132,China;China Electrotechnical Society,Beijing 100055,China)

机构地区：[1]河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300132 [2]中国电工技术学会,北京100055

出　　处：《电机与控制学报》2021年第10期49-57,共9页Electric Machines and Control

基　　金：河北省高等学校科学技术研究项目(BJ201943)。

摘　　要：针对二阶广义积分器(SOGI)在快速瞬态响应的情况下幅值积分过程不理想、参数设计困难的问题,提出一种具有精确幅值积分特性的正交信号发生器。首先,从一阶系统(FOS)的角度分析SOGI-QSG的动态响应。其次,对广义正交积分器(GI-QSG)的动态响应存在的问题做进一步分析。结果表明,SOGI-QSG的时域响应不仅与增益有关,还受到输入信号参数的影响。为解决此问题,提出基于精确幅值积分器的正交信号发生器(AMI-QSG),与SOGI相比,AMI对正弦信号具有更优异的幅值积分性能,并且其幅值响应更接近FOS,因此其参数设计可以参考FOS,使参数设计更加简单。此外,还可以方便地调整AMI-QSG的结构来抑制直流分量和提取谐波分量。最后通过仿真和实验验证了理论分析的正确性和所提方法的优越性。In order to solve the problem that the amplitude integration process of second order generalized integrator(SOGI) is not ideal and the parameter design is difficult under the condition of fast transient response, an orthogonal signal generator with precise amplitude integration is proposed. Firstly, the dynamic response of SOGI-QSG was analyzed from the perspective of first order system(FOS). Secondly, the problems existing in the dynamic response of generalized-integrator based quadrature-signal-generator(GI-QSG) were further analyzed. The results show that the time-domain response of SOGI-QSG is dependent on the gain, and affected by the input signal parameters. In order to solve this problem, an accurate-magnitude-integrator based quadrature-signal-generator(AMI-QSG) is proposed. Compared with SOGI, AMI has better amplitude integration performance for sinusoidal signals, and its amplitude response is closer to FOS. Therefore, FOS can be used for parameter design, which makes parameter design simpler. In addition, the structure of AMI-QSG can be easily adjusted to suppress the DC component and extract the harmonic component. Finally, the correctness of the theoretical analysising and the superiority of the proposed method are verified by simulation and experiment.

关 键 词：正交信号发生器 二阶广义积分器 一阶系统 二阶系统 直流分量 谐波提取 

分 类 号：TM761[电气工程—电力系统及自动化]