The amplitude, frequency and phase angle of the grid voltage are essential three components to ensure synchronization for grid interactive inverters. Synchronous reference frame-phase locked loop (SRF-PLL) is widely used to obtain these components. Although the SRF-PLL shows a perfect performance under ideal grid conditions, its performance deteriorates under unbalanced and distorted grid conditions. Therefore, researchers have been working to provide more advanced PLL methods. A dual third order generalized integrator PLL (DTOGI-PLL) and quasi-type-1 PLL (QT1-PLL) are two PLL methods that have come to the fore in grid synchronization recently. As with any method, these PLL methods have both advantages and disadvantages. The aim of this study is to integrate the advantages of the two methods, and to develop a new PLL method with better performance than these two methods. It means that the proposed PLL has the adaptive filtering capability of the DTOGI-PLL and fast transient response of the QT1-PLL. The effectiveness of the proposed PLL is confirmed by experimental results. The experimental results demonstrate that the proposed PLL is a more effective method than the DTOGI-PLL and QT1-PLL under adverse grid conditions.

电网电压的幅值、频率和相位角是确保电网交互逆变器同步必不可少的三个组成部分。同步参考帧锁相环 (SRF-PLL) 被广泛用于获取这些组件。尽管 SRF-PLL 在理想电网条件下表现出完美的性能，但在不平衡和失真的电网条件下其性能会恶化。因此，研究人员一直致力于提供更先进的 PLL 方法。双三阶广义积分器锁相环（DTOGI-PLL）和准1型锁相环（QT1-PLL）是最近在电网同步中脱颖而出的两种锁相环方法。与任何方法一样，这些 PLL 方法既有优点也有缺点。本研究的目的是整合两种方法的优点，并开发一种新的 PLL 方法，其性能优于这两种方法。这意味着所提出的 PLL 具有 DTOGI-PLL 的自适应滤波能力和 QT1-PLL 的快速瞬态响应。实验结果证实了所提出的锁相环的有效性。实验结果表明，在不利的电网条件下，所提出的锁相环是一种比 DTOGI-PLL 和 QT1-PLL 更有效的方法。