NDLI: Design and implementation of perturbation observer-based robust passivity-based control for VSC-MTDC systems considering offshore wind power integration

Content Provider	IET Digital Library
Author	Sang, Yiyan Yang, Bo Yao, Wei Jiang, Lin
Abstract	Voltage source converter-based multi-terminal high-voltage direct current (VSC-MTDC) systems are starting to be commissioned. However, concentrated integration of large-scale wind power demands stronger robustness against power fluctuation and system disturbances to increase the reliability of the whole system. This study proposes a perturbation observer-based robust passivity-based control (PORPC) for VSC-MTDC systems connected to an offshore wind farm to meet the demands. The aggregated effect of system nonlinearities, parameter uncertainties, unmodelled dynamics and external disturbances includes grid faults and time-varying wind power output is estimated by a linear perturbation observer and fully compensated by a passive controller, thus no accurate VSC-MTDC system model is required. PORPC attempts to regulate DC voltage and reactive power at the rectifier side, as well as active power and reactive power at the inverters side connected to an offshore wind farm. Besides, a DC-link voltage droop controller is introduced so as to provide immediate response to the grid unbalance situation. Moreover, a noticeable robustness against parameter uncertainties can be achieved as no accurate system model is needed. Case studies are carried out to compare the performance of PORPC to other typical approaches. Finally, a hardware-in-the-loop test is undertaken via dSPACE which validate its implementation feasibility.
Starting Page	2415
Ending Page	2424
Page Count	10
ISSN	17518687
Volume Number	12
e-ISSN	17518695
Issue Number	Issue 10, May (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/12/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2017.1693
Journal	IET Generation, Transmission & Distribution
Publisher Date	2018-02-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Current Control DC Voltage Regulation DC-link Voltage Droop Controller DSPACE Simulator Electric Current Control Grid Fault Hardware-in-the-loop Test Invertors Large-scale Wind Power Demand Linear Perturbation Observer Multiterminal High-voltage Direct Current System Observers Offshore Installations Offshore Wind Farm Offshore Wind Power Integration Passive Controller Perturbation Observer-based Robust Passivity-based Control PORPC Power And Energy Control Power Generation Control Power Generation Fault Power Grid Power System Control Reactive Power Control Reactive Power Regulation Rectifier Rectifying Circuit Reliability Renewable Energy Source Robust Control Stability in Control Theory Time-varying Wind Power Output Estimation Voltage Control Voltage Source Converter VSC-MTDC System Model Wind Power Plant
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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Methodology of calculating droop coefficients for stabilising DC voltage in VSC-MTDC system against disturbances

Fault characteristics and protection adaptability analysis in VSC-HVDC-connected offshore wind farm integration system

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Interactive teaching–learning optimiser for parameter tuning of VSC-HVDC systems with offshore wind farm integration

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Design and implementation of perturbation observer-based robust passivity-based control for VSC-MTDC systems considering offshore wind power integration

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