Impacts of Phase-Locked Loop Dynamic on the Stability of DC-Link Voltage Control in Voltage Source Converter Integrated to Weak Grid

Yunhui Huang, Lingyun Wang,Sidong Zhang,Dong Wang,Xiangtian Deng,Guorong Zhu

IEEE Journal on Emerging and Selected Topics in Circuits and Systems（2022）

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摘要

This paper investigates the impact of phase-locked loop (PLL) dynamic on the stability of DC-link voltage control (DVC) in voltage source converter (VSC) attached to weak grid. To start with, a small signal model of VSC attached to weak grid in DVC timescale is presented for stability analysis. On the basis, the dynamic characteristics of VSC are analyzed from the perspective of damping and restor...

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关键词

Phase locked loops,Power system stability,Voltage control,Circuit stability,Mathematical models,Stability criteria,Analytical models

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