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Research on Grid-Connected Control of VSG Based on PLL(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年01期
Page:
20-24
Research Field:
电气工程
Publishing date:

Info

Title:
Research on Grid-Connected Control of VSG Based on PLL
Author(s):
Yang Yang; Ding Shuye; Xu Zhengrong; Yang Xu; Wang Shun
School of NARI Electrical and Automation,Nanjing Normal University,Nanjing 210023,China
Keywords:
Virtual Synchronous Generator; Phase Locked Loop; pre-synchronous
PACS:
TM761
DOI:
10.3969/j.issn.1672-1292.2020.01.004
Abstract:
The access of new energy to power grid through power electronic interface also brings new challenges to the stable operation of power grid. The inverter has a large impact current at the moment when it is switched from the off-grid mode to the grid-connected mode. This paper presents a pre-synchronous grid-connected control technology of Virtual Synchronous Generator based on Phase Locked Loop,which can effectively solve this problem and quickly enter the grid-connected operation. The inverter under this control strategy can achieve a smooth grid-connected mode,synchronously track the phase of voltage,effectively suppress a large impact current,fastly realize switching from the off-grid mode to the grid-connected mode. Meanwhile,it has improved the performance of inverter in the grid-connected mode,and enhanced the stability of the power grid. Finally,the grid-connected Virtual Synchronous Generator model is built to verify the correctness and effectiveness of the design.

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Last Update: 2020-03-15