Decoupled Active and Reactive Power Predictive Control for PV Applications using a Grid-tied Quasi-Z-Source Inverter

Sarthak Jain, Mohammad B. Shadmand, Robert Balog

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper proposes a predictive power control algorithm that decouples active and reactive power for grid integration of photovoltaic (PV) systems using a quasi-Z-source inverter (qZSI). This is important to meet the emerging smart inverter requirements for grid interconnection. The proposed controller uses model predictive control (MPC) framework to ensure that the maximum available power is harvested from the PV array and that the active and reactive power injected into the grid is controlled to compensate reactive power required by local loads and as need to ensure stable operation of the grid at the point of common coupling (PCC). Thus, a power electronics interface (PEI) is proposed to integrate the PV array to the grid and to work as a reactive power compensator simultaneously. A robust technique is proposed to regulate the impedance network voltage and current according to the maximum operating point of PV panels and grid voltage/current requirements. The proposed controller features a simple structure suitable for practical implementation, fast dynamic response under changing sky condition, and negligible tracking error in steady state for decoupled active and reactive power control in a typical distributed generation (DG) systems. The performance of the proposed controller is verified experimentally; the grid-side power quality analysis is provided and evaluated according to IEEE-519 standard.

Original languageEnglish
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
DOIs
Publication statusAccepted/In press - 6 Apr 2018

Fingerprint

Reactive power
Power control
Controllers
Distributed power generation
Model predictive control
Electric potential
Power quality
Power electronics
Dynamic response

Keywords

  • grid-tied inverter
  • Impedance source inverter
  • Inverters
  • model predictive control
  • Predictive control
  • PV system
  • Reactive power
  • reactive power compensation
  • Switches
  • Voltage control

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

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title = "Decoupled Active and Reactive Power Predictive Control for PV Applications using a Grid-tied Quasi-Z-Source Inverter",
abstract = "This paper proposes a predictive power control algorithm that decouples active and reactive power for grid integration of photovoltaic (PV) systems using a quasi-Z-source inverter (qZSI). This is important to meet the emerging smart inverter requirements for grid interconnection. The proposed controller uses model predictive control (MPC) framework to ensure that the maximum available power is harvested from the PV array and that the active and reactive power injected into the grid is controlled to compensate reactive power required by local loads and as need to ensure stable operation of the grid at the point of common coupling (PCC). Thus, a power electronics interface (PEI) is proposed to integrate the PV array to the grid and to work as a reactive power compensator simultaneously. A robust technique is proposed to regulate the impedance network voltage and current according to the maximum operating point of PV panels and grid voltage/current requirements. The proposed controller features a simple structure suitable for practical implementation, fast dynamic response under changing sky condition, and negligible tracking error in steady state for decoupled active and reactive power control in a typical distributed generation (DG) systems. The performance of the proposed controller is verified experimentally; the grid-side power quality analysis is provided and evaluated according to IEEE-519 standard.",
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AB - This paper proposes a predictive power control algorithm that decouples active and reactive power for grid integration of photovoltaic (PV) systems using a quasi-Z-source inverter (qZSI). This is important to meet the emerging smart inverter requirements for grid interconnection. The proposed controller uses model predictive control (MPC) framework to ensure that the maximum available power is harvested from the PV array and that the active and reactive power injected into the grid is controlled to compensate reactive power required by local loads and as need to ensure stable operation of the grid at the point of common coupling (PCC). Thus, a power electronics interface (PEI) is proposed to integrate the PV array to the grid and to work as a reactive power compensator simultaneously. A robust technique is proposed to regulate the impedance network voltage and current according to the maximum operating point of PV panels and grid voltage/current requirements. The proposed controller features a simple structure suitable for practical implementation, fast dynamic response under changing sky condition, and negligible tracking error in steady state for decoupled active and reactive power control in a typical distributed generation (DG) systems. The performance of the proposed controller is verified experimentally; the grid-side power quality analysis is provided and evaluated according to IEEE-519 standard.

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