An improved second order generalized integrators phase locked loop for flexible DC transmission

被引：1

作者：

Wei Zhiwen ^{[1
]}

Pan Wei ^{[1
]}

Ma DaoYuan ^{[2
]}

Zhong Qihao ^{[1
]}

机构：

[1] Guangdong Power Grid Co, Dongguan Power Supply Bur, Dongguan 523000, Peoples R China

[2] NR Elect Co Ltd, Nanjing 211102, Peoples R China

来源：

ENERGY REPORTS | 2022年 / 8卷

关键词：

Second order generalized integrator (SOGI); Phase-locked loops (PLL); Unbalanced voltage; Harmonics; STABILITY; PLL;

D O I：

10.1016/j.egyr.2022.03.119

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Accurate and fast phase locking is the primary condition for flexible DC transmission to realize reliable control. When the power grid is unbalanced or contains high-order harmonics, the traditional second order generalized integrator (SOGI) itself has the defect of strong dependence on the input signal frequency. Therefore, this paper proposes an improved phase-locked loops (PLL), which introduces moving average filter into the SOGI structure to filter out higher harmonics. The improved SOGI-PLL is simulated and analyzed under grid voltage unbalance and high harmonics. The results show that the improved SOGI-PLL has well grid adaptability. (C) 2022 Published by Elsevier Ltd.

引用

页码：1406 / 1412

页数：7

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