Hybrid Connected Unified Power Quality Conditioner Integrating Distributed Generation With Reduced Power Capacity and Enhanced Conversion Efficiency

In this article, a hybrid connected unified power quality conditioner integrating distributed generation (HCUPQC-DG) is proposed. Two dc ports are created at the dc link of the HCUPQC-DG, in which one low-voltage (LV) dc port is directly connected to distributed generation (DG), and the other high-voltage (HV) dc port is indirectly connected to DG through the front-end dc–dc converter. With the hybrid connected configuration, the HV is designed to ensure the dc–ac voltage conversion capability, whereas the LV, i.e., the voltage of DG, can be relatively low and vary in a wide range. Besides, most active power can be directly transferred from DG to the ac load or grid through the direct power flow path. Hence, the conversion efficiency is enhanced, and the power capacity of the front-end dc–dc converter is significantly reduced. The operating principle and the control and modulation strategies of the proposed HCUPQC-DG are discussed. Moreover, the power flow through the HCUPQC-DG is analyzed in detail to understand the system operation. Experimental results with a 3-kVA prototype are provided to verify the feasibility and effectiveness of the proposed HCUPQC-DG.

[1]  Zedong Zheng,et al.  A Generalized Carrier-Overlapped PWM Method for Neutral-Point-Clamped Multilevel Converters , 2020, IEEE Transactions on Power Electronics.

[2]  Hongfei Wu,et al.  Quasi-Two-Stage Multifunctional Photovoltaic Inverter With Power Quality Control and Enhanced Conversion Efficiency , 2020, IEEE Transactions on Power Electronics.

[3]  Kai Sun,et al.  A Flexible Power Control for PV-Battery Hybrid System Using Cascaded H-Bridge Converters , 2019, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[4]  Leonardo Bruno Garcia Campanhol,et al.  Power Flow and Stability Analyses of a Multifunctional Distributed Generation System Integrating a Photovoltaic System With Unified Power Quality Conditioner , 2019, IEEE Transactions on Power Electronics.

[5]  Kai Sun,et al.  A High Efficiency Quasi-Single-Stage Unified Power Quality Conditioner Integrating Distributed Generation , 2019, 2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation Systems (PEDG).

[6]  Li Zhang,et al.  Bidirectional Three-Phase DC–AC Converter With Embedded DC–DC Converter and Carrier-Based PWM Strategy for Wide Voltage Range Applications , 2019, IEEE Transactions on Industrial Electronics.

[7]  Bin Jiang,et al.  Data-Driven Detection of Hot Spots in Photovoltaic Energy Systems , 2019, IEEE Transactions on Systems, Man, and Cybernetics: Systems.

[8]  Leonardo P. Sampaio,et al.  Dynamic performance comparison involving grid-connected PV systems operating with active power-line conditioning and subjected to sudden solar irradiation changes , 2019 .

[9]  Bhim Singh,et al.  Implementation of solar photovoltaic system with universal active filtering capability , 2019, 2018 IEEMA Engineer Infinite Conference (eTechNxT).

[10]  Ali Emadi,et al.  On the Concept of the Multi-Source Inverter for Hybrid Electric Vehicle Powertrains , 2018, IEEE Transactions on Power Electronics.

[11]  Mário Lúcio da Silva Martins,et al.  Series-Connected Partial-Power Converters Applied to PV Systems: A Design Approach Based on Step-Up/Down Voltage Regulation Range , 2018, IEEE Transactions on Power Electronics.

[12]  Tao Zhang,et al.  Two-stage transformerless dual-buck PV grid-connected inverters with high efficiency , 2018 .

[13]  Qi Guo,et al.  A review of series voltage source converter with fault current limiting function , 2018 .

[14]  DESIGN AND PERFORMANCE ANALYSIS OF THREE-PHASE SOLAR PV INTEGRATED UPQC , 2018 .

[15]  Leonardo Bruno Garcia Campanhol,et al.  Single-Stage Three-Phase Grid-Tied PV System With Universal Filtering Capability Applied to DG Systems and AC Microgrids , 2017, IEEE Transactions on Power Electronics.

[16]  Vinicius Dario Bacon,et al.  A Versatile Unified Power Quality Conditioner Applied to Three-Phase Four-Wire Distribution Systems Using a Dual Control Strategy , 2016, IEEE Transactions on Power Electronics.

[17]  Mariesa Crow,et al.  An ultracapacitor integrated power conditioner for intermittency smoothing and improving power quality of distribution grid , 2015, 2015 IEEE Power & Energy Society General Meeting.

[18]  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.

[19]  Yong Lu,et al.  A Transformerless Active Voltage Quality Regulator With the Parasitic Boost Circuit , 2014, IEEE Transactions on Power Electronics.

[20]  Abdul Hamid Bhat,et al.  Capacitor Voltage Balancing of Three-Phase Neutral-Point-Clamped Rectifier Using Modified Reference Vector , 2014, IEEE Transactions on Power Electronics.

[21]  Li Zhang,et al.  An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures , 2014, IEEE Transactions on Power Electronics.

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

[23]  Fei Wang,et al.  Grid-Interfacing Converter Systems With Enhanced Voltage Quality for Microgrid Application—Concept and Implementation , 2011, IEEE Transactions on Power Electronics.

[24]  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.

[25]  Poh Chiang Loh,et al.  A grid-interfacing power quality compensator for three-phase three-wire microgrid applications , 2006, IEEE Transactions on Power Electronics.

[26]  B. Han,et al.  Combined operation of unified power-quality conditioner with distributed generation , 2006, IEEE Transactions on Power Delivery.