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Title: Double-Line-Frequency Ripple Model, Analysis & Impedance Design for Energy Stored Single-Phase Quasi-Z Source Photovoltaic System

The battery energy stored quasi-Z-source (BESqZS) based photovoltaic (PV) power generation system combines advantages of the qZS inverter and the battery energy storage system. But, the second harmonic (2ω) power ripple degrades the system’s performance and affects the system’s design. An accurate model to analyze the 2ω ripple is very important. The existing models did not consider the battery, or assumed a symmetric qZS network with L 1=L 2 and C 1=C 2, which limits the design freedom and causes oversized impedance parameters. Our paper proposes a comprehensive model for the single-phase BES-qZS-PV inverter system, where the battery is considered and there is no restriction of L 1=L 2 and C 1=C 2. Based on the built model, a BES-qZS impedance design method is proposed to mitigate the 2ω ripple with asymmetric qZS network. Simulation and experimental results verify the proposed 2ω ripple model and impedance design method.
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  1. Beijing Jiaotong Univ. (China)
  2. Texas A & M Univ., Doha (Qatar)
  3. Texas A & M Univ., College Station, TX (United States). Dept. of Electrical and Computer Engineering
  4. Texas A & M Univ., Doha (Qatar). Electrical and Computer Engineering Dept.
  5. Texas A & M Univ., College Station, TX (United States). Electrical and Computer Engineering
  6. Siemens Corporation, Princeton, NJ (United States). Corporate Technology
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
IEEE Translations on Industrial Electronics
Additional Journal Information:
Journal Volume: PP; Journal Issue: 99; Journal ID: ISSN 0278-0046
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
Country of Publication:
United States
25 ENERGY STORAGE; 2ω ripple model; quasi-Z-source inverter; battery energy storage; photovoltaic power system
OSTI Identifier: