Optimal operation of UPQC under VA capacity constraints based on hierarchical optimization

Abstract This paper presents an optimal operation scheme for unified power quality conditioner (UPQC) under VA capacity constraints based on hierarchical optimization ideas. Three optimization objectives are taken into account in the proposed scheme and they include: (1) to minimize load voltage deviation; (2) to maximize power factor (PF) of the power grid; (3) to minimize the total apparent power of the UPQC. Because this is a multi-objective optimization problem which is not easy to solve in real-time, it is transformed into several single-objective optimization problems based on the priority of the optimization objectives. By solving the single-objective optimization problems, the operation of UPQC is divided into four simple optimal operation modes. Two case studies with different VA capacity constraints are implemented to verify the optimal operation of UPQC with the proposed method. Simulation results verify the correctness and effectiveness of the proposed method and the related performance analysis.

[1]  Malabika Basu,et al.  Investigation on the performance of UPQC-Q for voltage sag mitigation and power quality improvement at a critical load point , 2008 .

[2]  Hui Li,et al.  Multi-objective control of multi-functional grid-connected inverter for renewable energy integration and power quality service , 2016 .

[3]  Fengjiang Wu,et al.  Optimal Design and Control Implementation of UPQC Based on Variable Phase Angle Control Method , 2018, IEEE Transactions on Industrial Informatics.

[4]  Sharad W. Mohod,et al.  A STATCOM-Control Scheme for Grid Connected Wind Energy System for Power Quality Improvement , 2010, IEEE Systems Journal.

[5]  T. Green,et al.  The development of power quality markets , 2002, 2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309).

[6]  Vinod Khadkikar,et al.  A Novel Ten-Switch Topology for Unified Power Quality Conditioner , 2016, IEEE Transactions on Power Electronics.

[7]  Ambrish Chandra,et al.  UPQC-S: A Novel Concept of Simultaneous Voltage Sag/Swell and Load Reactive Power Compensations Utilizing Series Inverter of UPQC , 2011, IEEE Transactions on Power Electronics.

[8]  Y.Y. Kolhatkar,et al.  Experimental Investigation of a Single-Phase UPQC With Minimum VA Loading , 2007, IEEE Transactions on Power Delivery.

[9]  Hirofumi Akagi,et al.  The unified power quality conditioner: the integration of series- and shunt-active filters , 1998 .

[10]  V. Khadkikar,et al.  Enhancing Electric Power Quality Using UPQC: A Comprehensive Overview , 2012, IEEE Transactions on Power Electronics.

[11]  Fengjiang Wu,et al.  Optimization of the Size of UPQC System Based on Data-Driven Control Design , 2018, IEEE Transactions on Smart Grid.

[12]  B. Kalyan Kumar,et al.  Optimal VA loading of UPQC during mitigation of unbalanced voltage sags with phase jumps in three-phase four-wire distribution system , 2010 .

[13]  Yi Tang,et al.  Parameter Design of a Novel Series-Parallel-Resonant LCL Filter for Single-Phase Half-Bridge Active Power Filters , 2017, IEEE Transactions on Power Electronics.

[14]  Vinod Khadkikar,et al.  Optimal Sizing of UPQC Considering VA Loading and Maximum Utilization of Power-Electronic Converters , 2014, IEEE Transactions on Power Delivery.

[15]  Sanjib Ganguly,et al.  Multi-Objective Planning for Reactive Power Compensation of Radial Distribution Networks With Unified Power Quality Conditioner Allocation Using Particle Swarm Optimization , 2014, IEEE Transactions on Power Systems.

[16]  A. Chandra,et al.  A New Control Philosophy for a Unified Power Quality Conditioner (UPQC) to Coordinate Load-Reactive Power Demand Between Shunt and Series Inverters , 2008, IEEE Transactions on Power Delivery.

[17]  Bhim Singh,et al.  Power Factor Corrected Zeta Converter Based Improved Power Quality Switched Mode Power Supply , 2015, IEEE Transactions on Industrial Electronics.

[18]  Zhe Chen,et al.  A Double-Resistive Active Power Filter System to Attenuate Harmonic Voltages of a Radial Power Distribution Feeder , 2016, IEEE Transactions on Power Electronics.

[19]  Mahesh Kumar Mishra,et al.  Minimization of VA loading of Unified Power Quality Conditioner (UPQC) , 2009, 2009 International Conference on Power Engineering, Energy and Electrical Drives.

[20]  Malabika Basu,et al.  A 12-kVA DSP-Controlled Laboratory Prototype UPQC Capable of Mitigating Unbalance in Source Voltage and Load Current , 2010, IEEE Transactions on Power Electronics.

[21]  Malabika Basu,et al.  Intelligent Islanding and Seamless Reconnection Technique for Microgrid With UPQC , 2015, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[22]  Huan Yang,et al.  Objective-Oriented Power Quality Compensation of Multifunctional Grid-Tied Inverters and Its Application in Microgrids , 2015, IEEE Transactions on Power Electronics.