Stacked Low-Inertia Converter or Solid-State Transformer: Modeling and Model Predictive Priority-Shifting Control for Voltage Balance

Zheng, Liran; Kandula, Rajendra Prasad; Kandasamy, Karthik; Divan, Deepak

doi:10.1109/tpel.2021.3050115

Stacked Low-Inertia Converter or Solid-State Transformer: Modeling and Model Predictive Priority-Shifting Control for Voltage Balance

Journal Article · Fri Jan 08 00:00:00 EST 2021 · IEEE Transactions on Power Electronics

DOI:https://doi.org/10.1109/tpel.2021.3050115· OSTI ID:1894261

^[1]; ^[2]; Kandasamy, Karthik ^[2]; ^[2]

Georgia Inst. of Technology, Atlanta, GA (United States); Georgia Tech
Georgia Inst. of Technology, Atlanta, GA (United States)

This paper presents control challenges of stacked low-inertia converter (SLIC) or cascaded reduced dc-link solid-state transformer (SST) and proposes a novel model predictive priority-shifting (MPPS) control with implicit modulator and a discrete-time large-signal model for voltage balancing and dc-link regulation. Low-inertia converters, featuring small electrolytic capacitor-less dc links, dramatically reduce cost, size, and weight compared to conventional solutions. However, without a large dc-link buffer, the input and output are tightly coupled, leading to significant control challenges. The control becomes even more challenging with these converters stacked input-series output-parallel (ISOP) for medium-voltage (MV) grid, which causes coupling between the modules besides the coupling within each module. This paper analyzes the multi-objective, multi-degree of freedom control problem, using the modular soft-switching solid-state transformer (M-S4T) as an example of the SLIC. First, distribution of control efforts under controller saturation is critical because multiple control objectives can be conflicting, especially when the module voltages are unbalanced and are being restored. The MPPS can shift the priorities to address this issue. Second, due to the low inertia and high dc-link ripple, classic space vector pulse-width modulation (SVPWM), average model with small-ripple assumption, and control design based on small-signal model cannot accurately modulate, model, and control the nonlinear reduced dc link. Therefore, a discrete-time large-signal model of the M-S4T is established to derive the predictive control in the MPPS. The MPPS and the PI control are compared in MV simulations to show the issue of applying the PI to the SLIC and the effectiveness of the MPPS for voltage balancing and dc-link regulation in a deadbeat manner. Finally, the proposed control is tested on a 5 kV ISOP SiC SST prototype to verify priority shifting to address controller saturation issue and fast and robust voltage balancing.

View Accepted Manuscript (DOE)

Research Organization:: Georgia Inst. of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0006521

OSTI ID:: 1894261

Journal Information:: IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 8 Vol. 36; ISSN 0885-8993

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

References (51)

Grid Converters for Photovoltaic and Wind Power Systems Teodorescu, Remus; Liserre, Marco; Rodríguez, Pedro https://doi.org/10.1002/9780470667057		December 2010
AC/DC/AC PWM converter with reduced energy storage in the DC link Malesani, L.; Rossetto, L.; Tenti, P. IEEE Transactions on Industry Applications, Vol. 31, Issue 2 https://doi.org/10.1109/28.370275	journal	January 1995
A novel hysteresis control method for current-controlled voltage-source PWM inverters with constant modulation frequency Malesani, L.; Tenti, P. IEEE Transactions on Industry Applications, Vol. 26, Issue 1 https://doi.org/10.1109/28.52678	journal	January 1990
Speed control of interior permanent magnet synchronous motor drive for the flux weakening operation No authors listed IEEE Transactions on Industry Applications, Vol. 33, Issue 1 https://doi.org/10.1109/28.567075	journal	January 1997
Robust dead-beat current control for PWM rectifiers and active filters Malesani, L.; Mattavelli, P.; Buso, S. IEEE Transactions on Industry Applications, Vol. 35, Issue 3 https://doi.org/10.1109/28.767012	journal	January 1999
Control techniques for improved high-speed performance of interior PM synchronous motor drives Macminn, S. R.; Jahns, T. M. IEEE Transactions on Industry Applications, Vol. 27, Issue 5 https://doi.org/10.1109/28.90358	journal	January 1991
Uninterruptible power supply multiloop control employing digital predictive voltage and current regulators Buso, S.; Fasolo, S.; Mattavelli, P. IEEE Transactions on Industry Applications, Vol. 37, Issue 6 https://doi.org/10.1109/28.968200	journal	January 2001
An adaptive hysteresis-band current control technique of a voltage-fed PWM inverter for machine drive system Bose, B. K. IEEE Transactions on Industrial Electronics, Vol. 37, Issue 5 https://doi.org/10.1109/41.103436	journal	January 1990
Comparison of current control techniques for active filter applications Buso, S.; Malesani, L.; Mattavelli, P. IEEE Transactions on Industrial Electronics, Vol. 45, Issue 5 https://doi.org/10.1109/41.720328	journal	January 1998
Modeling, control, and design of input-series-output-parallel-connected converter for high-speed-train power system No authors listed IEEE Transactions on Industrial Electronics, Vol. 48, Issue 3 https://doi.org/10.1109/41.925580	journal	June 2001
Charge control: modeling, analysis, and design Tang, W.; Lee, F. C.; Ridley, R. B. IEEE Transactions on Power Electronics, Vol. 8, Issue 4 https://doi.org/10.1109/63.261009	journal	October 1993
Dead beat control of three phase PWM inverter Kawabata, T.; Miyashita, T.; Yamamoto, Y. IEEE Transactions on Power Electronics, Vol. 5, Issue 1 https://doi.org/10.1109/63.45996	journal	January 1990
7.2 kV Three-Port Single-Phase Single-Stage Modular Soft-Switching Solid-State Transformer with Active Power Decoupling and Reduced DC-Link Zheng, Liran; Han, Xiangyu; Kandula, Rajendra Prasad 2020 IEEE Applied Power Electronics Conference and Exposition (APEC) https://doi.org/10.1109/APEC39645.2020.9124244	conference	March 2020
New Single-Stage Soft-Switching Solid-State Transformer with Reduced Conduction Loss and Minimal Auxiliary Switch Zheng, Liran; Kandula, Rajendra Prasad; Divan, Deepak 2020 IEEE Applied Power Electronics Conference and Exposition (APEC) https://doi.org/10.1109/APEC39645.2020.9124346	conference	March 2020
Soft-switching isolated tri-port converter for integration of PV, storage and single-phase AC grid Bilakanti, Nishant; Zheng, Liran; Kandula, Rajendra Prasad 2017 IEEE Energy Conversion Congress and Exposition (ECCE) https://doi.org/10.1109/ECCE.2017.8095822	conference	October 2017
Fast Dynamic Control of Stacked Low Inertia Converters Zheng, Liran; Kandula, Rajendra Prasad; Kandasamy, Karthik 2018 IEEE Energy Conversion Congress and Exposition (ECCE) https://doi.org/10.1109/ECCE.2018.8558217	conference	September 2018
Modular Universal Converter for MVDC Applications Zheng, Liran; Han, Xiangyu; An, Zheng 2018 IEEE Energy Conversion Congress and Exposition (ECCE) https://doi.org/10.1109/ECCE.2018.8558291	conference	September 2018
PWM Converter Power Density Barriers Kolar, J. W.; Drofenik, U.; Biela, J. 2007 Power Conversion Conference - Nagoya https://doi.org/10.1109/PCCON.2007.372914	conference	April 2007
Voltage-Balancing Method for IGBTs Connected in Series Sasagawa, K.; Abe, Y.; Matsuse, K. IEEE Transactions on Industry Applications, Vol. 40, Issue 4 https://doi.org/10.1109/TIA.2004.830794	journal	July 2004
A DC-link capacitor minimization method through direct capacitor current control No authors listed IEEE Transactions on Industry Applications, Vol. 42, Issue 2 https://doi.org/10.1109/TIA.2006.870036	journal	March 2006
Common-duty-ratio control of input-series connected modular DC-DC converters with active input voltage and load-current sharing Giri, R.; Choudhary, V.; Ayyanar, R. IEEE Transactions on Industry Applications, Vol. 42, Issue 4 https://doi.org/10.1109/TIA.2006.876064	journal	July 2006
An Improved DC-Link Voltage Fast Control Scheme for a PWM Rectifier-Inverter System No authors listed IEEE Transactions on Industry Applications, Vol. 50, Issue 1 https://doi.org/10.1109/TIA.2013.2269037	journal	January 2014
Reliability of Capacitors for DC-Link Applications in Power Electronic Converters—An Overview Wang, Huai; Blaabjerg, Frede IEEE Transactions on Industry Applications, Vol. 50, Issue 5 https://doi.org/10.1109/TIA.2014.2308357	journal	September 2014
An FPGA-Based Voltage Balancing Control for Multi-HV-IGBTs in Series Connection Ji, Shiqi; Wang, Fei; Tolbert, Leon M. IEEE Transactions on Industry Applications, Vol. 54, Issue 5 https://doi.org/10.1109/TIA.2018.2836936	journal	September 2018
An Improved Deadbeat Control for UPS Using Disturbance Observers Mattavelli, P. IEEE Transactions on Industrial Electronics, Vol. 52, Issue 1 https://doi.org/10.1109/TIE.2004.837912	journal	February 2005
Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives Rodriguez, JosÉ; Bernet, Steffen; Wu, Bin IEEE Transactions on Industrial Electronics, Vol. 54, Issue 6 https://doi.org/10.1109/TIE.2007.907044	journal	December 2007
Comparison of Prediction Techniques to Compensate Time Delays Caused by Digital Control of a Three-Phase Buck-Type PWM Rectifier System Nussbaumer, Thomas; Heldwein, Marcelo Lobo; Gong, Guanghai IEEE Transactions on Industrial Electronics, Vol. 55, Issue 2 https://doi.org/10.1109/TIE.2007.909061	journal	January 2008
Predictive Control in Power Electronics and Drives Cortes, P.; Kazmierkowski, M. P.; Kennel, R. M. IEEE Transactions on Industrial Electronics, Vol. 55, Issue 12 https://doi.org/10.1109/TIE.2008.2007480	journal	December 2008
Control Strategy for Input-Series–Output-Parallel Converters No authors listed IEEE Transactions on Industrial Electronics, Vol. 56, Issue 4 https://doi.org/10.1109/TIE.2008.2007980	journal	April 2009
Model Predictive Control—A Simple and Powerful Method to Control Power Converters Kouro, S.; Cortes, P.; Vargas, R. IEEE Transactions on Industrial Electronics, Vol. 56, Issue 6 https://doi.org/10.1109/TIE.2008.2008349	journal	June 2009
Delay Compensation in Model Predictive Current Control of a Three-Phase Inverter Cortes, Patricio; Rodriguez, Jose; Silva, Cesar IEEE Transactions on Industrial Electronics, Vol. 59, Issue 2 https://doi.org/10.1109/TIE.2011.2157284	journal	February 2012
Power Electronic Traction Transformer—Medium Voltage Prototype Zhao, Chuanhong; Dujic, Drazen; Mester, Akos IEEE Transactions on Industrial Electronics, Vol. 61, Issue 7 https://doi.org/10.1109/TIE.2013.2278960	journal	July 2014
DC-Link Capacitance Minimization in T-Type Three-Level AC/DC/AC PWM Converters Alemi, Payam; Jeung, Yoon-Cheul; Lee, Dong-Choon IEEE Transactions on Industrial Electronics, Vol. 62, Issue 3 https://doi.org/10.1109/TIE.2014.2345354	journal	March 2015
Weighting Factor Design in Model Predictive Control of Power Electronic Converters: An Artificial Neural Network Approach Dragicevic, Tomislav; Novak, Mateja IEEE Transactions on Industrial Electronics, Vol. 66, Issue 11 https://doi.org/10.1109/TIE.2018.2875660	journal	November 2019
Predictive Control Based DC Microgrid Stabilization With the Dual Active Bridge Converter Chen, Linglin; Gao, Fei; Shen, Ke IEEE Transactions on Industrial Electronics, Vol. 67, Issue 10 https://doi.org/10.1109/TIE.2020.2965460	journal	October 2020
A Bidirectional Isolated DC–DC Converter as a Core Circuit of the Next-Generation Medium-Voltage Power Conversion System Inoue, Shigenori; Akagi, Hirofumi IEEE Transactions on Power Electronics, Vol. 22, Issue 2 https://doi.org/10.1109/TPEL.2006.889939	journal	March 2007
Master/Slave Control of Input-Series- and Output-Parallel-Connected Converters: Concept for Low-Cost High-Voltage Auxiliary Power Supplies Grbovic, P. J. IEEE Transactions on Power Electronics, Vol. 24, Issue 2 https://doi.org/10.1109/TPEL.2008.2006975	journal	February 2009
Research on voltage and power balance control for cascaded modular solid-state transformer Shi, Jianjiang; Gou, Wei; Yuan, Hao IEEE Transactions on Power Electronics, Vol. 26, Issue 4 https://doi.org/10.1109/TPEL.2011.2106803	journal	April 2011
Common-Duty-Ratio Control of Input-Series Output-Parallel Connected Phase-shift Full-Bridge DC–DC Converter Modules Shi, Jianjiang; Luo, Jie; He, Xiangning IEEE Transactions on Power Electronics, Vol. 26, Issue 11 https://doi.org/10.1109/TPEL.2011.2142325	journal	November 2011
3-D Space Modulation With Voltage Balancing Capability for a Cascaded Seven-Level Converter in a Solid-State Transformer She, Xu; Huang, Alex Q.; Wang, Gangyao IEEE Transactions on Power Electronics, Vol. 26, Issue 12 https://doi.org/10.1109/TPEL.2011.2142422	journal	December 2011
An Experimentally Verified Active Gate Control Method for the Series Connection of IGBT/Diodes Baraia, Igor; Barrena, Jon Andoni; Abad, Gonzalo IEEE Transactions on Power Electronics, Vol. 27, Issue 2 https://doi.org/10.1109/TPEL.2011.2161336	journal	February 2012
A Flicker-Free Electrolytic Capacitor-Less AC–DC LED Driver Wang, Shu; Ruan, Xinbo; Yao, Kai IEEE Transactions on Power Electronics, Vol. 27, Issue 11 https://doi.org/10.1109/TPEL.2011.2180026	journal	November 2012
Enhanced Load Step Response for a Bidirectional DC–DC Converter Segaran, Dinesh; Holmes, Donald Grahame; McGrath, Brendan Peter IEEE Transactions on Power Electronics, Vol. 28, Issue 1 https://doi.org/10.1109/TPEL.2012.2200505	journal	January 2013
Voltage and Power Balance Control for a Cascaded H-Bridge Converter-Based Solid-State Transformer Zhao, Tiefu; Wang, Gangyao; Bhattacharya, Subharshish IEEE Transactions on Power Electronics, Vol. 28, Issue 4 https://doi.org/10.1109/TPEL.2012.2216549	journal	April 2013
Comparison of the Modular Multilevel DC Converter and the Dual-Active Bridge Converter for Power Conversion in HVDC and MVDC Grids Engel, Stefan P.; Stieneker, Marco; Soltau, Nils IEEE Transactions on Power Electronics, Vol. 30, Issue 1 https://doi.org/10.1109/TPEL.2014.2310656	journal	January 2015
Control and Experiment of an H-Bridge-Based Three-Phase Three-Stage Modular Power Electronic Transformer Wang, Xinyu; Liu, Jinjun; Ouyang, Shaodi IEEE Transactions on Power Electronics, Vol. 31, Issue 3 https://doi.org/10.1109/TPEL.2015.2434420	journal	March 2016
Power and Voltage Balance Control of a Novel Three-Phase Solid-State Transformer Using Multilevel Cascaded H-Bridge Inverters for Microgrid Applications Wang, Liang; Zhang, Donglai; Wang, Yi IEEE Transactions on Power Electronics, Vol. 31, Issue 4 https://doi.org/10.1109/TPEL.2015.2450756	journal	April 2016
Output Current-Differential Control Scheme for Input-Series–Output-Parallel-Connected Modular DC–DC Converters Qu, Lu; Zhang, Donglai; Bao, Zhiyun IEEE Transactions on Power Electronics, Vol. 32, Issue 7 https://doi.org/10.1109/TPEL.2016.2607459	journal	July 2017
Voltage Balance Control Based on Dual Active Bridge DC/DC Converters in a Power Electronic Traction Transformer Liu, Jianqiang; Yang, Jingxi; Zhang, Jiepin IEEE Transactions on Power Electronics, Vol. 33, Issue 2 https://doi.org/10.1109/TPEL.2017.2679489	journal	February 2018
Design of a 10-kV·A Soft-Switching Solid-State Transformer (S4T) Chen, Hao; Divan, Deepak IEEE Transactions on Power Electronics, Vol. 33, Issue 7 https://doi.org/10.1109/TPEL.2017.2749430	journal	July 2018
Soft-Switching Solid-State Transformer With Reduced Conduction Loss Zheng, Liran; Kandula, Rajendra Prasad; Divan, Deepak IEEE Transactions on Power Electronics, Vol. 36, Issue 5 https://doi.org/10.1109/TPEL.2020.3030795	journal	May 2021

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Stacked Low-Inertia Converter or Solid-State Transformer: Modeling and Model Predictive Priority-Shifting Control for Voltage Balance

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References (51)

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