A Decentralized Multiloop Scheme for Robust Control of a Power Flow Controller With Two Shunt Modular Multilevel Converters

This paper investigates the robust multiloop control for power flow controller in power transmission grids. A hybrid power flow controller (HPFC) is proposed, which comprises two shunt modular-multilevel-converter (MMC) based voltage source converters and one series capacitor. A nonlinear multiloop controller is designed via control Lyapunov function to achieve fast tracking performance, and robustness against system uncertainties and disturbances. Stability of the closed-loop nonlinear HPFC system is proved using Lyapunov stability theorem. The proposed finite-time controller (FTC) is decentralized using adaptive observer to estimate the nonlocal system parameters, in case of communication failure. Simulation and experimental studies are used to validate the proposed FTC with detailed model of MMCs, and the interarea oscillation damping with Phasor model of HPFC. Comparisons of the proposed FTC and the conventional PI controller show that the FTC has fast control response, small transient overshoot, and improved robustness.

[1]  G. Besançon,et al.  On adaptive observers for state affine systems , 2006 .

[2]  J. Peralta,et al.  Detailed and Averaged Models for a 401-Level MMC–HVDC System , 2012, IEEE Transactions on Power Delivery.

[3]  Udaya K. Madawala,et al.  Decoupled Control of Modular Multilevel Converters Using Voltage Correcting Modules , 2015, IEEE Transactions on Power Electronics.

[4]  Y. H. Song,et al.  Robust FACTS control design using the H/sub /spl infin// loop-shaping method , 2002 .

[5]  Shao Zhang,et al.  Transformer-Less Unified Power-Flow Controller Using the Cascade Multilevel Inverter , 2016, IEEE Transactions on Power Electronics.

[6]  Prakash K. Ray,et al.  Robust fuzzy-sliding mode based UPFC controller for transient stability analysis in autonomous wind-diesel-PV hybrid system , 2016 .

[7]  G. A. Putrus,et al.  Design of an Adaptive Neurofuzzy Inference Control System for the Unified Power-Flow Controller , 2012, IEEE Transactions on Power Delivery.

[8]  Tsao-Tsung Ma.  P–Q decoupled control schemes using fuzzy neural networks for the unified power flow controller , 2007 .

[9]  Rik W. De Doncker,et al.  Control of the Modular Multi-Level Converter for minimized cell capacitance , 2011, Proceedings of the 2011 14th European Conference on Power Electronics and Applications.

[10]  Ganesh K. Venayagamoorthy,et al.  Wide-Area Signal-Based OptimalNeurocontroller for a UPFC , 2008 .

[11]  C. Nagamani,et al.  Independent control of real and reactive power flows using UPFC based on adaptive back stepping , 2008, TENCON 2008 - 2008 IEEE Region 10 Conference.

[12]  Peter W. Lehn,et al.  P-/spl delta/ characteristics for the unified power flow controller-analysis inclusive of equipment ratings and line limits , 2003 .

[13]  K. Ilves,et al.  Open-Loop Control of Modular Multilevel Converters Using Estimation of Stored Energy , 2011, IEEE Transactions on Industry Applications.

[14]  Lennart Harnefors,et al.  VSC-HVDC Transmission with Cascaded Two-Level Converters , 2010 .

[15]  Takaharu Takeshita,et al.  Line Loss Minimization in Isolated Substations and Multiple Loop Distribution Systems Using the UPFC , 2014, IEEE Transactions on Power Electronics.

[16]  Amin Mohammadpour Shotorbani,et al.  Application of the direct Lyapunov method for robust finite-time power flow control with a unified power flow controller , 2012 .

[17]  Katsuhiko Ogata,et al.  Modern Control Engineering , 1970 .

[18]  Reza Iravani,et al.  Dynamic performance of a modular multilevel back-to-back HVDC system , 2010, 2011 IEEE Power and Energy Society General Meeting.

[19]  Rainer Marquardt,et al.  An innovative modular multilevel converter topology suitable for a wide power range , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[20]  Leonid M. Fridman,et al.  Analysis of chattering in continuous sliding-mode controllers , 2005, IEEE Transactions on Automatic Control.

[21]  Mohammad Pourmahmood Aghababa,et al.  Direct lyapunov theory-based method for power oscillation damping by robust finite-time control of unified power flow controller , 2013 .

[22]  Saad Mekhilef,et al.  Fuzzy-Logic-Based UPFC and Laboratory Prototype Validation for Dynamic Power Flow Control in Transmission Lines , 2017, IEEE Transactions on Industrial Electronics.

[23]  Muhammad Murtadha Othman,et al.  Optimal unified power flow controller application to enhance total transfer capability , 2015 .

[24]  Rainer Marquardt,et al.  Modular Multilevel Converter - Impact on future applications and semiconductors , 2017 .

[25]  Yi Tang,et al.  Feedback Linearization-Based Current Control Strategy for Modular Multilevel Converters , 2018, IEEE Transactions on Power Electronics.

[26]  Mohammad Pourmahmood Aghababa,et al.  Robust terminal sliding mode power flow controller using unified power flow controller with adaptive observer and local measurement , 2014 .

[27]  L. Gyugyi,et al.  The unified power flow controller: a new approach to power transmission control , 1995 .

[28]  Georgios Konstantinou,et al.  Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels , 2016, IEEE Transactions on Power Electronics.

[29]  J. Soltani,et al.  Damping of Low Frequency Oscillations of Multi-Machine Multi-UPFC Power Systems, Based on Adaptive Input-Output Feedback Linearization Control , 2012, IEEE Transactions on Power Systems.

[30]  Remus Teodorescu,et al.  Control of a Modular Multilevel Converter With Reduced Internal Data Exchange , 2017, IEEE Transactions on Industrial Informatics.

[31]  Dietmar Retzmann,et al.  Transformation of the Energy System in Germany ¿ Enhancement of System Stability by Integration of innovative Multilevel HVDC in the AC Grid , 2013 .

[32]  Mehran Sabahi,et al.  Unified power flow controller based on two shunt converters and a series capacitor , 2010 .

[33]  Brendan Peter McGrath,et al.  Low-Order Circulating Current Suppression of PWM-Based Modular Multilevel Converters Using DC-Link Voltage Compensation , 2018, IEEE Transactions on Power Electronics.

[34]  Xiaorui Wang,et al.  Application of Transformer-Less UPFC for Interconnecting Two Synchronous AC Grids With Large Phase Difference , 2016, IEEE Transactions on Power Electronics.

[35]  S. F. Pinto,et al.  Linear and Sliding-Mode Control Design for Matrix Converter-Based Unified Power Flow Controllers , 2014, IEEE Transactions on Power Electronics.

[36]  Qinghua Zhang,et al.  Adaptive observer for multiple-input-multiple-output (MIMO) linear time-varying systems , 2002, IEEE Trans. Autom. Control..