Hierarchical voltage imbalance control for single-/three-phase hybrid multimicrogrid

With the rapid development of distributed generation (DG), microgrids and multimicrogrids (MMGs) appear at the end of distribution networks. For the islanded operation of a single-/three-phase hybrid MMG, a hierarchical coordinated control scheme is proposed in this study that includes primary and secondary levels. A compound control strategy based on quasi-proportional resonant and robust control is proposed for the primary voltage/frequency control to suppress voltage fluctuations caused by sudden changes in load power and DG output power; a coordinated strategy regarding tie-line power at the point of common coupling (PCC) is proposed for the secondary control to simultaneously improve voltage imbalance at the terminal of the master power supply, PCC, and load terminal. The proposed hierarchical coordinated control scheme is compared with conventional proportional–integral control and a control method based on the PCC to verify its performance. Test studies verify the superior robustness and voltage imbalance control performance of the proposed control scheme in coping with a sudden change in power and unbalanced loads.

[1]  V. Katic,et al.  Power Quality Problems Compensation With Universal Power Quality Conditioning System , 2007, IEEE Transactions on Power Delivery.

[2]  Tzung-Lin Lee,et al.  A Cooperative Imbalance Compensation Method for Distributed-Generation Interface Converters , 2007 .

[3]  Mehdi Savaghebi,et al.  Secondary Control for Voltage Quality Enhancement in Microgrids , 2012, IEEE Transactions on Smart Grid.

[4]  Feng Qiu,et al.  Identification of Critical Switches for Integrating Renewable Distributed Generation by Dynamic Network Reconfiguration , 2018, IEEE Transactions on Sustainable Energy.

[5]  V. Agarwal,et al.  A DSP Based Optimal Algorithm for Shunt Active Filter Under Nonsinusoidal Supply and Unbalanced Load Conditions , 2007, IEEE Transactions on Power Electronics.

[6]  Mohsen Rahmani,et al.  Multi-microgrid energy systems operation incorporating distribution-interline power flow controller , 2015 .

[7]  Mohsen Hamzeh,et al.  Harmonic and Negative-Sequence Current Control in an Islanded Multi-Bus MV Microgrid , 2014, IEEE Transactions on Smart Grid.

[8]  Bhim Singh,et al.  An Implementation of an Adaptive Control Algorithm for a Three-Phase Shunt Active Filter , 2009, IEEE Transactions on Industrial Electronics.

[9]  Zhanshan Wang,et al.  A Diagnosis Algorithm for Multiple Open-Circuited Faults of Microgrid Inverters Based on Main Fault Component Analysis , 2018, IEEE Transactions on Energy Conversion.

[10]  Ehsan Azad-Farsani,et al.  Network expansion planning with microgrid aggregators under uncertainty , 2018 .

[11]  G. Weiss,et al.  H/sup /spl infin// repetitive control of DC-AC converters in microgrids , 2004, IEEE Transactions on Power Electronics.

[12]  Juan C. Vasquez,et al.  State-of-Charge Balance Using Adaptive Droop Control for Distributed Energy Storage Systems in DC Microgrid Applications , 2014, IEEE Transactions on Industrial Electronics.

[13]  Nan Yang,et al.  Adaptive Nonparametric Kernel Density Estimation Approach for Joint Probability Density Function Modeling of Multiple Wind Farms , 2019, Energies.

[14]  Heng Nian,et al.  Flexible Compensation Strategy for Voltage Source Converter Under Unbalanced and Harmonic Condition Based on a Hybrid Virtual Impedance Method , 2018, IEEE Transactions on Power Electronics.

[15]  So Ping Lam,et al.  Voltage and frequency control during microgrid islanding in a multi-area multi-microgrid system , 2017 .

[16]  Wu Mingli,et al.  High performance control strategy for single-phase three-level neutral-point-clamped traction four-quadrant converters , 2017 .

[17]  Ping Yang,et al.  Voltage Control Strategy for Three/Single Phase Hybrid Multimicrogrid , 2016, IEEE Transactions on Energy Conversion.

[18]  H. Karimi,et al.  A Robust Two-Degree-of-Freedom Control Strategy for an Islanded Microgrid , 2013, IEEE Transactions on Power Delivery.

[19]  Yimin Zhou,et al.  Smart generation control based on multi-agent reinforcement learning with the idea of the time tunnel , 2017, Energy.

[20]  Seung-Ki Sul,et al.  A Novel Filter Design for Output LC Filters of PWM Inverters , 2011 .

[21]  Mohsen Hamzeh,et al.  A New Control Strategy for a Multi-Bus MV Microgrid Under Unbalanced Conditions , 2012, IEEE Transactions on Power Systems.

[22]  Qing-Chang Zhong,et al.  A Current-Control Strategy for Voltage-Source Inverters in Microgrids Based on $H^{\infty }$ and Repetitive Control , 2011, IEEE Transactions on Power Electronics.

[23]  Mohammad Hassan Moradi,et al.  Cooperative control strategy of energy storage systems and micro sources for stabilizing microgrids in different operation modes , 2016 .

[24]  Poh Chiang Loh,et al.  Microgrid power quality enhancement using a three-phase four-wire grid-interfacing compensator , 2004, IEEE Transactions on Industry Applications.

[25]  Mehdi Savaghebi,et al.  Tertiary Control of Voltage Unbalance Compensation for Optimal Power Quality in Islanded Microgrids , 2014, IEEE Transactions on Energy Conversion.

[26]  Chris S. Edrington,et al.  Voltage balancing of islanded microgrids using a time-domain technique , 2012 .

[27]  Shan Cheng,et al.  Multi-objective reactive power optimization strategy for distribution system with penetration of distributed generation , 2014 .

[28]  Manuel A. Matos,et al.  Integrated micro-generation, load and energy storage control functionality under the multi micro-grid concept , 2013 .

[29]  Yong Wang,et al.  General distributed secondary control for multi-microgrids with both PQ-controlled and droop-controlled distributed generators , 2017 .

[30]  Mehdi Savaghebi,et al.  Autonomous Voltage Unbalance Compensation in an Islanded Droop-Controlled Microgrid , 2013, IEEE Transactions on Industrial Electronics.

[31]  P.C. Loh,et al.  A grid-interfacing power quality compensator for three-phase three-wire microgrid applications , 2006, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[32]  Tianqi Liu,et al.  Co-optimisation for distribution networks with multi-microgrids based on a two-stage optimisation model with dynamic electricity pricing , 2017 .

[33]  Mehdi Savaghebi,et al.  Secondary Control Scheme for Voltage Unbalance Compensation in an Islanded Droop-Controlled Microgrid , 2012, IEEE Transactions on Smart Grid.