Scholarlink

<p>This work addresses the problem of controlling an active power filtering system, based on half bridge inverter (HBI), used for compensation of reactive power and cancelation of undesired harmonics generated by the nonlinear loads. The filtering system is connected to photovoltaic (PV) generator through DC/DC three level boost converter (TLBC). The main control objectives are: (i) maximal extraction of PV power by using an adequate maximum power point tracking (MPPT) algorithm, (ii) ensuring a tight PV voltage regulation, (iii) guaranteeing a balance between the output voltages of TLBC, (iv) achieving a perfect power factor correction (PFC) at the power grid, (v) regulating the DC link voltage boosted by the TLBC. The main difficulties in this control problem include: (i) system dynamics nonlinearity and high dimensionality, (ii) several system variables are not accessible to measurements. The control problem is dealt with by designing a multi-loop nonlinear controller, involving four loops, designed making use of backstepping and Lyapunov techniques. A PV-loop regulator regulates the PV output voltage. A balancing-loop regulator ensure the balance between the voltages at the two capacitors of inverter. The inner-loop regulator copes with the compensation issue. An outer-loop regulator regulates the DC bus voltage to constant reference value. A formal analysis of the proposed control system is developed making use of various theoretical tools. The performances of the proposed nonlinear controller are highlighted, in various operating conditions, by simulation using MATLAB/Simulink environment. The simulation results confirm the theoretical performances. Besides stability, it is checked that the proposed control considerably reduces total harmonic distortion (THD) of the grid current falling down from 40.83 to 0.95%, complying thus with IEEE-519 standard. Similar reduction is observed with ripple rate of DC bus voltage signal, falling down to 0.34%. Power factor (PF) is also considerably improved approaching unity (0.99995–1). Furthermore, the shunt active power filter transmits 6.3 kW of power produced by the solar generator, reducing thus the load on the electrical grid. Finally, a comparative study, in terms of THD and PF, is performed showing the supremacy of the proposed control method over some existing literature.</p>

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Sensorless advanced multi-loop nonlinear control of single-phase shunt active power filter connected to photovoltaic system via DC/DC three level boost converter

  • 期刊论文

  • 发表日期：

    2026年7月15日

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  • Younes Abouelmahjoub,
  • Hassan Abouobaida,
  • Youssef Mchaouar,
  • Fouad Giri,
  • Mohamed Elouafi

摘要

This work addresses the problem of controlling an active power filtering system, based on half bridge inverter (HBI), used for compensation of reactive power and cancelation of undesired harmonics generated by the nonlinear loads. The filtering system is connected to photovoltaic (PV) generator through DC/DC three level boost converter (TLBC). The main control objectives are: (i) maximal extraction of PV power by using an adequate maximum power point tracking (MPPT) algorithm, (ii) ensuring a tight PV voltage regulation, (iii) guaranteeing a balance between the output voltages of TLBC, (iv) achieving a perfect power factor correction (PFC) at the power grid, (v) regulating the DC link voltage boosted by the TLBC. The main difficulties in this control problem include: (i) system dynamics nonlinearity and high dimensionality, (ii) several system variables are not accessible to measurements. The control problem is dealt with by designing a multi-loop nonlinear controller, involving four loops, designed making use of backstepping and Lyapunov techniques. A PV-loop regulator regulates the PV output voltage. A balancing-loop regulator ensure the balance between the voltages at the two capacitors of inverter. The inner-loop regulator copes with the compensation issue. An outer-loop regulator regulates the DC bus voltage to constant reference value. A formal analysis of the proposed control system is developed making use of various theoretical tools. The performances of the proposed nonlinear controller are highlighted, in various operating conditions, by simulation using MATLAB/Simulink environment. The simulation results confirm the theoretical performances. Besides stability, it is checked that the proposed control considerably reduces total harmonic distortion (THD) of the grid current falling down from 40.83 to 0.95%, complying thus with IEEE-519 standard. Similar reduction is observed with ripple rate of DC bus voltage signal, falling down to 0.34%. Power factor (PF) is also considerably improved approaching unity (0.99995–1). Furthermore, the shunt active power filter transmits 6.3 kW of power produced by the solar generator, reducing thus the load on the electrical grid. Finally, a comparative study, in terms of THD and PF, is performed showing the supremacy of the proposed control method over some existing literature.