摘要
针对单相并网变流器的同步问题,为了消除传统正交虚拟信号生成中的延迟环节,结合坐标变换,提出了一种基于双派克变换的无正交虚拟信号的同步单相锁相环设计方法。将单相信号作为派克变换的一相输入,另一相为零,通过两个派克变换,最终获得单相信号的频率和相位,并验证了算法的正确性。分析了基于双派克变换的数字锁相环系统结构;解决了数字系统初值优化的问题;设计了相应的压控振荡器和滤波器及双派克变换的程序结构,实现了系统的数字化设计。仿真和实验结果表明,所设计的基于双派克变换的数字锁相环可准确快速地实现锁相功能。
According to the synchronization problem of single-phase grid connected converter, in oraer to eliminate the traditional orthogonal virtual signal generation used delay link, combined with the coordinate transformation, this paper puts forward a design of single-phase phase locked loop based on double Park trans- form that has no orthogonal virtual signal and be synchronized . The single-phase signal will be one of the Park transformation input, another input is zero. Finally the single-phase signal＇s frequency and phase will be ob- tained after two Park transformations. The algorithm is verified from the point of view of mathematics; the digital phase locked based on double park transformation system structure is raised; the initial value problem of optimized digital system is solved; the corresponding voltage controlled oscillators and filters are designed; and the program structure of double park transformation is also designed, the design of digital system is realized. The simulation and experimental results show that, the design of digital phase locked loop based on double Park transformation can quickly and accurately achieve phase lock function.
出处
《中原工学院学报》
CAS
2015年第1期26-30,共5页
Journal of Zhongyuan University of Technology
关键词
双派克变换
锁相环
初值优化
数字化设计
double Park transformation
phase locked loop
initial value optimization
digital design
