A frequency-based LCL filter design and control considerations for three-phase converters for solid-state transformer applications

Almaguer, J.; Cárdenas, Víctor; Aganza-Torres, Alejandro; González, M.; Alcala, J.

doi:10.1007/s00202-019-00801-0

Cited by 9 publications

(3 citation statements)

References 39 publications

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Section: Introductionmentioning

confidence: 99%

A Novel Controller Strategy for Damping LCL Oscillations in Reduced DC Voltage fed Single Phase D-STATCOM

Satpathy

2023

Preprint

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This work focuses on a new topology-control basedD-STATCOM solution with reduced DC bus voltage requirementand with an excellent grid side performances. The proposedconcept consists of a main shunt converter and a series converterwith a transformer to achieve the desired DC bus reduction.The active damping based on capacitor current feedback andassociated additional capacitor current sensor requirement areeliminated by using a proposed double controller structure for seriesand shunt converters with only series current as a controlledvariable. Moreover, the stability related issues based on converterinductor selection is studied extensively for the above controllerand superiority of the proposed concept is demonstrated. Theproposed solution is verified through simulation studies andthrough a scaled-down experimental prototype.

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Section: Introductionmentioning

confidence: 99%

A Novel Controller Strategy for Damping LCL Oscillations in Reduced DC Voltage fed Single Phase D-STATCOM

Satpathy

2023

Preprint

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“…If inverter current is sensed and controlled the LCL resonating frequency should be below 1/6th of control frequency otherwise system would not be able to damp out the oscillations and this results in poor harmonic filtering [16], [17]. On the other hand, if grid current is sensed and controlled then the LCL resonating frequency should be more than 1/6 th of control frequency [18] - [20]. Even though a higher resonance frequency is cost effective, it cannot be always guaranteed that the parameters are not subjected to any changes and that the frequency of resonance is always fixed.…”

Section: Introductionmentioning

confidence: 99%

A Novel Controller Strategy for LCL Damping in Reduced DC Voltage fed D-STATCOM

Satpathy

2023

Preprint

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This work focuses on a new topology-control based D-STATCOM solution with reduced DC bus voltage requirement and with an excellent grid side performances. The proposed concept consists of a main shunt converter and a series converter with a transformer to achieve the desired DC bus reduction. The active damping based on capacitor current feedback and associated additional capacitor current sensor requirement are eliminated by using a proposed double controller structure for series and shunt converters with only series current as a controlled variable. Moreover, the stability related issues based on converter inductor selection is studied extensively for the above controller and superiority of the proposed concept is demonstrated. The proposed solution is verified through simulation studies and through a scaled-down experimental prototype.

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“…The currently installed capacities of solar and wind energy are 580.1 and 622.7 GW out of 2563.8 GW total renewable energy capacity globally. Other than ever increasing global power demand, shift towards electric vehicles to reduce greenhouse effect plays a key role in increased deployment of solar and wind energy systems in future [1]. Electronic converters facilitate the interconnection renewable energy source on to the grid.…”

Section: Introductionmentioning

confidence: 99%

Integrated Renewable Smart Grid System Using Fuzzy Based Intelligent Controller

Vijayal¹,

Krishnamoorthi²

2022

Intelligent Automation &Amp; Soft Computing

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In high power medium voltage applications, the utilization of 5-H Bridge Multi-Level Inverter (MLI) has grown vastly in recent years. The 5-H Bridge MLI can effectively control link voltage as well as power factor. However, the inverter imparts harmonics owing to the high switching frequency. Hence Inductance Capacitance Inductance (LCL) filter is implemented at its output to mitigate harmonics in presence of non-linear load. It's of highly important to choose LCL parameters wisely in order to attain good filtering effect. This work investigates the application of 5-H Bridge MLI with LCL filter at the output for efficient integration of renewable energy sources on to the grid. A modified fuzzy heuristic approach is used to solve LCL power filter optimization problem at output of 5-H Bridge Multi-Level Inverter. Subject to the constraint's harmonic distortion and losses of the inverter, multi objective optimization problem is solved to obtain LCL filter optimal values. The optimized LCL filter design was applied to a grid connected cascaded H-bridge MLI of rating 4.5 MW, 11 kV. MATLAB-Simulink is utilized for modelling and simulating the system. The results showed that the system is more efficient and generic. dSPACE Hardware in Loop (HIL) test system was used to verify the efficacy of the prototype system.

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A frequency-based LCL filter design and control considerations for three-phase converters for solid-state transformer applications

Cited by 9 publications

References 39 publications

A Novel Controller Strategy for Damping LCL Oscillations in Reduced DC Voltage fed Single Phase D-STATCOM

A Novel Controller Strategy for Damping LCL Oscillations in Reduced DC Voltage fed Single Phase D-STATCOM

A Novel Controller Strategy for LCL Damping in Reduced DC Voltage fed D-STATCOM

Integrated Renewable Smart Grid System Using Fuzzy Based Intelligent Controller

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