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Performance Improvement for Two-Stage Single-Phase Grid-Connected Converters Using a Fast DC Bus Control Scheme and a Novel Synchronous Frame Current Controller

Author

Listed:
  • Bingzhang Li

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Shenghua Huang

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Xi Chen

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

Two-stage single-phase grid-connected converters are widely used in renewable energy applications. Due to the presence of a second harmonic ripple across the DC bus voltage, it is very challenging to design the DC bus voltage control scheme in single-phase grid-connected inverters. The DC bus voltage controller must filter the ripple and balance a tradeoff between low harmonic distortion and high bandwidth. This paper presents a fast DC bus voltage controller, which uses a second order digital finite impulse response (FIR) notch filter in conjunction with input power feedforward scheme to ensure the steady-state and dynamic performance. To gain the input power without extra hardware, a Kalman filter is incorporated to estimate the DC bus input current. At the same time, a modulation compensation strategy is implemented to eliminate the nonlinearity of the grid current control loop, which is caused by the DC bus voltage ripple. Moreover, a novel synchronous frame current controller for single-phase systems is also introduced, and its equivalent model in stationary frame has been derived. Simulation and experimental results are provided to verify the effective of the proposed control scheme.

Suggested Citation

  • Bingzhang Li & Shenghua Huang & Xi Chen, 2017. "Performance Improvement for Two-Stage Single-Phase Grid-Connected Converters Using a Fast DC Bus Control Scheme and a Novel Synchronous Frame Current Controller," Energies, MDPI, vol. 10(3), pages 1-30, March.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:3:p:389-:d:93455
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    References listed on IDEAS

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    2. Iman Lorzadeh & Hossein Askarian Abyaneh & Mehdi Savaghebi & Alireza Bakhshai & Josep M. Guerrero, 2016. "Capacitor Current Feedback-Based Active Resonance Damping Strategies for Digitally-Controlled Inductive-Capacitive-Inductive-Filtered Grid-Connected Inverters," Energies, MDPI, vol. 9(8), pages 1-32, August.
    3. Xingang Fu & Shuhui Li, 2016. "A Novel Neural Network Vector Control for Single-Phase Grid-Connected Converters with L, LC and LCL Filters," Energies, MDPI, vol. 9(5), pages 1-19, April.
    4. Zeng, Zheng & Yang, Huan & Zhao, Rongxiang & Cheng, Chong, 2013. "Topologies and control strategies of multi-functional grid-connected inverters for power quality enhancement: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 24(C), pages 223-270.
    5. Ningyun Zhang & Houjun Tang & Chen Yao, 2014. "A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters," Energies, MDPI, vol. 7(6), pages 1-21, June.
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    Cited by:

    1. Tao Peng & Peng Yang & Hanbing Dan & Hui Wang & Hua Han & Jian Yang & Hao Wang & Hui Dong & Patrick Wheeler, 2017. "A Single-Phase Bidirectional AC/DC Converter for V2G Applications," Energies, MDPI, vol. 10(7), pages 1-15, June.

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