State-feedback controller and observer design for grid-connected voltage source power converters with LCL-filter

Dirscherl, Christian; Fessler, J.T.; Hackl, Christoph M.; Ipach, Hanko

doi:10.1109/cca.2015.7320635

Cited by 26 publications

(24 citation statements)

References 15 publications

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“…The system consists of the 2L-VSI model (1), an LCL-filter, an RL-filer and an ideal grid (with resistive-inductive behavior). Details of the dynamical models of the filters and the grid are omitted here due to space limitations but can be found in [10], [12].…”

Section: Simulation Resultsmentioning

confidence: 99%

Instantaneous conduction and switching losses in two-level voltage source inverters

Fakharmanesh

Hackl

Perini

2017

2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Syst

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Abstract-A mathematical model is derived which allows to compute instantaneously the conduction and switching losses in two-level voltage source inverters (2L-VSIs) regardless of the employed modulation scheme. The model is based on the use of switching vectors applied to the considered VSI, taking into account the instantaneous conduction and switching losses of the semiconductor devices. The advantages of this method are, (i) it can be extended to any type of VSI and any modulation scheme, (ii) it can be applied to analyze the power losses of VSIs during any desired period, and (iii) it can be easily implemented in any kind of the simulation software (e.g. Matlab/Simulink).

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Section: Simulation Resultsmentioning

confidence: 99%

Instantaneous conduction and switching losses in two-level voltage source inverters

Fakharmanesh

Hackl

Perini

2017

2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Syst

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“…The control of grid-side power converters connected to the grid via LCL-filters is discussed in e.g. [60], [61].…”

Section: ) Drive Trainmentioning

confidence: 99%

Full- and Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent Magnet Synchronous Generator

et al. 2018

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Wind energy is an integral part of nowadays energy supply and one of the fastest growing sources of electricity in the world today. Accurate models for wind energy conversion systems (WECSs) are of key interest for the analysis and control design of present and future energy systems. Existing control-oriented WECSs models are subject to unstructured simplifications, which have not been discussed in literature so far. Thus, this technical note presents are thorough derivation of a physical state-space model for permanent magnet synchronous generator WECSs. The physical model considers all dynamic effects that significantly influence the system's power output, including the switching of the power electronics. Alternatively, the model is formulated in the (a, b, c)-and (d, q)-reference frame. Secondly, a complete control and operation management system for the wind regimes II and III and the transition between the regimes is presented. The control takes practical effects such as input saturation and integral windup into account. Thirdly, by a structured model reduction procedure, two state-space models of WECS with reduced complexity are derived: a non-switching model and a non-switching reduced-order model. The validity of the models is illustrated and compared through a numerical simulation study.

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“…The control of grid-side power converters connected to the grid via LCL-filters is discussed in e.g. [59,60].…”

Section: Remarkmentioning

confidence: 99%

Full- & Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent Magnet Synchronous Generator

Hackl¹,

Jané-Soneira²,

Pfeifer³

et al. 2018

Preprint

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Full-order state-space models represent the starting point for the development of advanced control methods for wind turbine systems (WTSs). Regarding existing control-oriented WTS models, two research gaps must be noted: (i) There exists no full-order WTS model in form of one overall ordinary differential equation that considers all dynamical effects which significantly influence the electrical power output; (ii) all existing reduced-order WTS models are subject to rather arbitrary simplifications and are not validated against a full-order model. Therefore, in this paper, two full-order nonlinear state-space models (of 11th and 9th-order in the (a, b, c)- and (d, q)-reference frame, resp.) for variable-speed variable-pitch permanent magnet synchronous generator WTSs are derived. The full-order models cover all relevant dynamical effects with significant impact on the system’s power output, including the switching behavior of the power electronic devices. Based on the full-order models, by a step-by-step model reduction procedure, two reduced-order WTS models are deduced: A non-switching (averaging) 7th-order WTS model and a non-switching 3rd-order WTS model. Comparative simulation results reveal that all models capture the dominant system dynamics properly. The full-order models allow for a detailed analysis covering the high frequency oscillations in the instantaneous power output due to the switching in the power converters. The reduced-order models provide a time-averaged instantaneous power output (which still correctly reflects the energy produced by the WTS) and come with a drastically reduced complexity making those models appropriate for large-scale power grid controller design.

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State-feedback controller and observer design for grid-connected voltage source power converters with LCL-filter

Cited by 26 publications

References 15 publications

Instantaneous conduction and switching losses in two-level voltage source inverters

Instantaneous conduction and switching losses in two-level voltage source inverters

Full- and Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent Magnet Synchronous Generator

Full- & Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent Magnet Synchronous Generator

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State-feedback controller and observer design for grid-connected voltage source power converters with LCL-filter

Cited by 26 publications

References 15 publications

Instantaneous conduction and switching losses in two-level voltage source inverters

Instantaneous conduction and switching losses in two-level voltage source inverters

Full- and Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent Magnet Synchronous Generator

Full- &amp; Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent Magnet Synchronous Generator

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Product

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Full- & Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent Magnet Synchronous Generator