NDLI: DC voltage deviation-dependent voltage droop control method for VSC-MTDC systems under large disturbances

Content Provider	IET Digital Library
Author	Wang, Yizhen Li, Bin Zhou, Zexin Chen, Zhengguang Wen, Weijie Li, Xialin Wang, Chengshan
Abstract	Along with the increasing demand of large power transfer and integration of renewable energy sources, voltage source converter based multi-terminal high-voltage DC (VSC-MTDC) technology has represented both challenges and opportunities. However, the DC voltage of the droop-controlled VSC station may exceed the DC voltage limits when facing large disturbances, thereby losing the DC voltage control and power sharing capabilities. To tackle this problem, a DC voltage deviation-dependent voltage droop control method (VDM) is proposed to change the droop coefficients adaptively when large disturbances occur, not only retaining the advantages of the fixed VDM in the steady state, but also preventing frequent adjustments of the droop coefficients in the transient state. The basic analytical model of droop-controlled VSC is analysed first, and then the generalised linear model of VSC-MTDC is derived based on the restrict requirements of DC voltage deviation. The DC voltage deviation-dependent VDM is derived from the generalised linear model of the VDC-MTDC. Case studies and simulations of a ±320 kV VSC-MTDC system are conducted in PSCAD/EMTDC software to validate the effectiveness of the proposed DC voltage deviation-dependent VDM.
Starting Page	891
Ending Page	896
Page Count	6
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 5, Apr (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0394
Journal	IET Renewable Power Generation
Publisher Date	2019-09-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System D.C. Transmission DC Voltage Control DC Voltage Deviation-dependent VDM DC Voltage Deviation-dependent Voltage Droop Control Method DC Voltage Limits Distributed Power Generation Droop Coefficient Droop-controlled VSC Station High-voltage DC Technology HVDC Power Converter HVDC Power Transmission Power Converter Power Generation Control Power Grid Power Supplies to Apparatus Renewable Energy Source Voltage 320.0 KV Voltage Control Voltage Source Converter VSC-MTDC System
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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