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<p>This paper presents a hybrid system that integrates a photovoltaic (PV) array, an energy storage system (ESS), and a Static Synchronous Compensator (STATCOM), utilizing a Quasi-Z Source Inverter (qZSI) to improve the efficiency of grid-connected power systems. The qZSI facilitates both voltage boosting and inversion in a single stage, enabling efficient power conversion from the PV array and ESS while minimizing component count. The STATCOM plays a crucial role in dynamic reactive power control and voltage regulation, while the ESS provides rapid charge and discharge capabilities, ensuring grid stability during voltage fluctuations and varying load demands. To enhance ESS battery safety, an energy management strategy is proposed, which regulates power flow to prevent overcharging and over-discharging, thereby extending its life and optimizing performance. The system operates in three distinct modes: PV mode for real power generation, PV-STATCOM mode for reactive power control and power factor correction, and ESS-STATCOM mode for emergency grid support. This integrated approach enhances power quality, improves grid flexibility, and supports the sustainable integration of renewable energy. MATLAB simulations confirm the system’s capability to maintain power quality and stabilize the grid across various operational scenarios, highlighting its efficiency and cost-effectiveness for modern power grids.</p>

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Enhancing energy management and power quality in grid-connected photovoltaic systems through ESS and STATCOM integration

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Kannan Nithin Kariyankattil Velukutty,
  • Deepa Sundararajan,
  • Muthuraman Ramaiah Krishnappa,
  • Senthil Kumar Angappan,
  • Munuswamy Premalatha,
  • Selligoundanur Subramaniyam Sivaraju,
  • Subramaniam Usha

摘要

This paper presents a hybrid system that integrates a photovoltaic (PV) array, an energy storage system (ESS), and a Static Synchronous Compensator (STATCOM), utilizing a Quasi-Z Source Inverter (qZSI) to improve the efficiency of grid-connected power systems. The qZSI facilitates both voltage boosting and inversion in a single stage, enabling efficient power conversion from the PV array and ESS while minimizing component count. The STATCOM plays a crucial role in dynamic reactive power control and voltage regulation, while the ESS provides rapid charge and discharge capabilities, ensuring grid stability during voltage fluctuations and varying load demands. To enhance ESS battery safety, an energy management strategy is proposed, which regulates power flow to prevent overcharging and over-discharging, thereby extending its life and optimizing performance. The system operates in three distinct modes: PV mode for real power generation, PV-STATCOM mode for reactive power control and power factor correction, and ESS-STATCOM mode for emergency grid support. This integrated approach enhances power quality, improves grid flexibility, and supports the sustainable integration of renewable energy. MATLAB simulations confirm the system’s capability to maintain power quality and stabilize the grid across various operational scenarios, highlighting its efficiency and cost-effectiveness for modern power grids.