Use of control based on passivity to mitigate the harmonic distortion level of inverters

Cupertino, Allan Fagner; Carlette, L. P.; Perez, Filipe; Resende, J.T. de; Seleme, Seleme Isaac; Pereira, Heverton A.

doi:10.1109/isgt-la.2013.6554439

Cited by 14 publications

(5 citation statements)

References 10 publications

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“…The passivity-based control (PBC), which was proposed by R. Ortega and M. Spong in 1989, can be stable globally in nonlinear system and has the advantages of simple design and easy implementation [19][20], and it has been used in power conversion system [21], rectifier [22][23], PV [20][24], STATCOM [25] and other grid-connected LCL converter [26] [27]. Obviously, all these studies promote electrical applications of PBC.…”

Section: An Improved Three-stages Cascading Passivity-based Control Of Grid-connected Lcl Converter In Unbalanc -Ed Weak Grid Conditionmentioning

confidence: 99%

An Improved Three-Stages Cascading Passivity-Based Control of Grid-Connected LCL Converter in Unbalanced Weak Grid Condition

Zhao

Ren

et al. 2021

IEEE Access

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This paper proposes an improved three-stages cascading passivity-based control (PBC) for a grid -connected LCL converter in unbalanced weak grid condition. In general, the traditional double-loop control based on positive and negative sequence transformations is used in grid-connected converter control in unbalanced weak grid condition. However, it is time consuming for second harmonic filtering, and positive and negative sequence currents need to be controlled separately. The PBC has strong robustness to interference, and the line voltage based PBC can deal with the voltage unbalance effectively and easily without negative sequence transformation. But the traditional PBC needs six variables and three damping coefficients for the grid-connected LCL converter in unbalanced grid condition, and it has the disadvantage of difficult implementation. The improved PBC can realize the same control effect with three-stages cascading PBCs of two variables and one damping coefficient, and it has the advantages of easy implementation, good performance and high stability. First, the modeling and controller design are detailed described. Then the SIMULINK simulation results demonstrate the benefits of the improved control strategy. Finally, a grid-connected LCL converter prototype of 5kW is built and the experimental results verify the correctness and effectivity of the improved three-stages PBC strategy.INDEX TERMS improved passivity-based control, LCL converter, unbalanced weak grid.

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Section: An Improved Three-stages Cascading Passivity-based Control Of Grid-connected Lcl Converter In Unbalanc -Ed Weak Grid Conditionmentioning

confidence: 99%

An Improved Three-Stages Cascading Passivity-Based Control of Grid-Connected LCL Converter in Unbalanced Weak Grid Condition

Zhao

Ren

et al. 2021

IEEE Access

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“…Among the controllers used, there are: proportional-integral (PI) [12,13], proportional-resonant (PR) [ [2, 5, [4] and nonlinear controllers [12,13]. PR controller can compensate only one frequency and it is necessary to implement one PR controller for each harmonic frequency.…”

Section: [Ntroductionmentioning

confidence: 99%

Saturation scheme for single-phase photovoltaic inverters in multifunctional operation

Xavier

Oliveira

Cupertino

et al. 2015

2015 IEEE 24th International Symposium on Industrial Electronics (ISIE)

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Single and three-phase photovoltaic inverters are responsible to extract the photovoltaic array power and inject it into the grid. Due to variations in solar irradiance, inverters have a current margin, which is not explored during the day. Thereby, many works have proposed multifunctional operation. This concept consists in aggregate to the inverter control strategy other functions, such as harmonics and reactive power compensation. However, most important fact and less related in literature is the necessity of techniques to compensate partially reactive power and harmonics of the load, ensuring the inverter work below the rated current. Hence, the present work proposes a current dynamic saturation scheme in order to compensate partially reactive power and harmonics of the load during the multifunctional operation. Simulations show that the dynamic saturation prevents the inverter of inject low-order harmonics whileensuring the operation below the system rated current. By applying the multifunctional operation, the grid current THD is reduced from 104.64% to 1.54% and reactive power is fully compensated, resulting in a considerable grid improvement.

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“…There are other implementations of PBC in power supply systems, e.g. in the grid connected inverters [9], [10] or in multilevel inverters [11]. However, the important problem of a dynamic unbalanced load in the three-phase systems has not yet been described.…”

Section: Introductionmentioning

confidence: 99%

A Control for an Unbalanced 3-Phase Load in UPS Systems

Rymarski¹,

Bernacki²,

Dyga³

2018

ElAEE

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Single input single output systems (SISO), which only control the output voltage of a voltage source inverter (VSI) using multi-loop feedback, are not sufficient in the event of a 3-phase unbalanced load. A much better solution is a Multi Input Single Output (MISO) control. In such a case, not only is the output voltage controlled but also the output current and the output filter inductor current. It seems that using a Passivity Based Control (PBC) is just one of the better solutions for a VSI. The paper presents simulations of a modified Improved PBC (IPBC2) using a stationary αβ frame in the event of an unbalanced load in a 3-wire delta load. The simulations were verified using the measurements of a 3-phase inverter experimental model with dynamic balanced and unbalanced loads.

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Use of control based on passivity to mitigate the harmonic distortion level of inverters

Cited by 14 publications

References 10 publications

An Improved Three-Stages Cascading Passivity-Based Control of Grid-Connected LCL Converter in Unbalanced Weak Grid Condition

An Improved Three-Stages Cascading Passivity-Based Control of Grid-Connected LCL Converter in Unbalanced Weak Grid Condition

Saturation scheme for single-phase photovoltaic inverters in multifunctional operation

A Control for an Unbalanced 3-Phase Load in UPS Systems

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