Conventional orthogonal signal generators (OSGs) employed in single-phase systems exhibit significant delay in tracking the original signal. To tackle this problem, an OSG with fast synchronizing speed is proposed by applying the principle of power definition of sinusoids. The proposed OSG can accurately track the single-phase input signal in less than half cycle, which is one cycle faster than the widely used OSGs. Depending on the application, the proposed OSG can be modified to meet application-based requirements. The proposed OSG in a single phase frequency locked-loop (FLL) implementation is firstly introduced in this paper. In addition, the ability of a low-pass filter to act not just as a filter, but to eliminate steady-state error is revealed. Through experimental comparison with Park and SOGI OSG-based FLLs, it is shown that the proposed OSG-based FLL provides faster estimation of frequency and phase angle of a single-phase voltage.

中文翻译：

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一种用于单相系统的新型基于功率的正交信号发生器

单相系统中使用的常规正交信号发生器（OSG）在跟踪原始信号时表现出明显的延迟。针对这一问题，提出了一种利用正弦功率定义原理的快速同步的OSG。提出的OSG可以在不到半个周期的时间内准确跟踪单相输入信号，这比广泛使用的OSG快一个周期。取决于应用程序，可以修改建议的OSG以满足基于应用程序的要求。本文首先介绍了在单相频率闭环（FLL）实现中提出的OSG。此外，还揭示了低通滤波器不仅可以充当滤波器，还可以消除稳态误差。通过与基于Park和SOGI OSG的FLL进行实验比较，