Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 16 of 16 for “"LCL filter"”.
-
Design of a grid-tied inverter and LCL filter for photovoltaic application
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
-
Control of a Single-Phase Grid-Connected Voltage Source Inverter with LCL Filter
… voltage source inverter (VSI) with an LCL filter that is used in renewable energy power conditioning applications. There are two main controllers that need to be designed: an external DC-bus voltage controller to balance the power flow coming into the VSI, and an internal current …
-
Improvement of Stability of a Grid-Connected Inverter with an LCL filter by Robust Strong Active Damping and Model Predictive Control
… by an inductive-capacitive-inductive (LCL) filter. A challenge of current control for the VSI is LCL filter resonance near to the control stability boundary, which interacts with the inverter control switching actions and creates the possibility of instability. In general, active …
-
Design of LCL-filters for grid-connected voltage source inverters
LCL-filters are preferred over conventional L-filters for grid-connected voltage source inverters (VSI) due to their superior harmonic attenuation, smaller filter size and weight. The LCL-filter design process is complex and takes an iterative approach due to the coherence between the filter …
-
Design and modeling of a power conditioning system for the hybrid fuel-cell/turbine power plant.
… width modulation (SPWM) DC/AC inverter, and an LCL filter. To regulate and stabilize the DC link voltage, DC/DC converter with PI controller is adopted. With three-phase SPWM inverter, both active and reactive power flow can be controlled. Both conventional proportional integral (PI) and the …
-
Investigation of Control Concepts for High-Speed Induction Machine Drives and Grid Side Pulse-Width Modulation Voltage Source Converters
… controlled active front end converter with L-filter in the presence of a parallel thyristor converter is investigated. The design of the LCL-filter components according to the given maximum grid current harmonics (e.g. IEEE-519) is a complex task. So far a precise and clear design procedure …
-
Power Sharing and Power Quality Improvement in Parallel Connected Power Converters in the Microgrid
… the VSCs need to dampen the high-order LCL filter resonance and to compensate harmonics caused by nonlinear loads. These multi-functional requirements are putting challenges to VSC converter control. To address above issues, this thesis investigates VSC control methods that can …
-
Grid current control methods for MV wind energy conversion systems
… Including the DC-link capacitor, grid converter, LCL filter and PCC voltage, the modelling of these parts is built in chapter 3. Besides, one scaled experiment low voltage system setup is designed and introduced as well, which will be used for experimental verification. For the control of the grid …
-
System Identification and Adaptive Control for Grid-Connected Single-Phase AC Inverters
… technique is proposed to passively estimate the LCL-filter parameters and DC input current. Using the parameter estimations of the output filter, an adaptive state-feedback system is proposed. Next, a frequency-adaptive current controller is proposed, which dynamically tunes to the frequency …
-
Control Design of a Single-Phase DC/AC Inverter for PV Applications
… control, the outer control loop regulates the filter capacitor voltage. Combining the synchronous frame outer control loop with the capacitor current feedback inner control loop, the system can achieve both zero steady-state error and better step load performance. For grid-tied inverter …
-
Advanced control architectures for grid connected and standalone converter systems
… is controlled directly by controlling the output filter capacitor current without using a dedicated output voltage sensor. A method to estimate the output filter capacitance is also presented. For the grid connected converter, a novel closed loop estimation is presented to estimate the grid …
-
Design, Implementation, and Analysis for an Improved Multiple Inverter Microgrid System
… A universal inverter is proposed with the LCL filter to operate in both grid-tie and standalone mode without any hardware modification. Next, controllers of individual inverters running in basic microgrid modes will be discussed to ensure high quality output characteristics. The admittance …
-
High Power High Frequency 3-level NPC Power Conversion System
… and redistribution result. The harmonic filter for the grid interface converter is designed with LCL topology. A detailed inductor current ripple analysis derives the maximum inductor current ripple and the ripple distribution in a line cycle. The inverter side inductor is designed with …
-
Comprehensive optimization and practical design of power electronic systems under multiple competing performance demands
Balancing trade-offs between several requirements, such as cost, steady-state performance, transient response, and efficiency is a constant theme in power electronic systems design. This project develops a comprehensive optimization approach to design the power stage and feedback controller …
-
Circuits and Modulation Schemes to Achieve High Power-Density in SiC Grid-connected Converters
… dc-link capacitors and a common-mode EMI filter. The increase in switching frequency calls for a large common-mode EMI filter, and dc-link capacitors in the three-level topology may take a considerable portion in the total volume. To reduce the common-mode noise emission, different …
-
Innovative Control Algorithms for Grid-Tied Inverters
L'abstract è presente nell'allegato / the abstract is in the attachment