Journal ArticleDOI
Frequency domain analysis of three phase linear current regulators
D.N. Zmood,Donald Grahame Holmes,Gerwich Bode +2 more
- Vol. 37, Iss: 2, pp 601-610
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TLDR
In this article, a technique for interpreting the stationary/rotating frame transformations as modulation processes in the Laplace domain is presented, which moves the control function from one part of the frequency spectrum to another.Abstract:
Stationary frame linear PI current regulators are conventionally regarded as unsatisfactory for AC systems because they cannot eliminate steady state errors. Consequently, synchronous frame regulators are perceived to be superior, since they achieve zero steady state error by acting on DC signals in a rotating frame of reference. However, a synchronous frame regulator is more complex, and requires in particular a way of transforming a measured stationary frame AC current (or error) to rotating frame DC quantities, and transforming the resultant control action back to the stationary frame for implementation. This paper presents a technique for interpreting the stationary/rotating frame transformations as modulation processes in the Laplace domain which move the control function from one part of the frequency spectrum to another. The technique is used to compare stationary and synchronous frame PI regulators on a common basis to better understand the advantages of a synchronous frame regulator, and then to develop a new form of stationary frame resonant regulator which achieves zero steady state error without requiring the complex transformations of a synchronous frame regulator. The performance of this new regulator is evaluated and found to be equivalent to that of the synchronous frame PI regulator.read more
Citations
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Proceedings ArticleDOI
Discrete time modeling, implementation and design of current controllers
TL;DR: In this paper, the authors address discrete time modeling, implementation and design options for the current control of three phase grid tied PWM converters, based on an accurate discrete time model of the PWM converter, closed loop current control is reviewed from the perspective of the synchronous and stationary reference frame.
Proceedings ArticleDOI
Power control for single-phase microgrid based on the PQ thoery
TL;DR: In this paper, a power control strategy for single-phase microgrid based on the single phase PQ theory is presented, where the connection current control can take the place of the power control to regulate active and reactive power transmission.
Proceedings ArticleDOI
Control and elimination of sinusoidal harmonics in power electronics equipment: A system approach
TL;DR: In this paper, a general framework for the analysis of elimination and control of harmonic components in power electronics applications is provided, with theoretical contributions and overview of methods for analysis of the harmonic components.
Power system integration of VSC-HVDC connected offshore wind power plants
TL;DR: In this article, the authors present an overview of challenges and solutions for the integration into the power system of offshore wind power plants (WPPs) connected to onshore grids through a voltage-source converter based high voltage direct current (VSC-HVDC) transmission system.
References
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Journal ArticleDOI
Current control techniques for three-phase voltage-source PWM converters: a survey
TL;DR: Current control techniques for three-phase voltage-source pulsewidth modulated converters, including bang-bang (hysteresis, delta modulation) controllers and predictive controllers with on-line optimization are reviewed.
Book
Vector Control and Dynamics of AC Drives
Donald W. Novotny,Thomas A. Lipo +1 more
TL;DR: In this article, the authors present a d-q model for solid state power converters and present a complex vector analysis of induction machines and synchronous machines with respect to vector control and field orientation.
Journal ArticleDOI
Model-based current control of AC machines using the internal model control method
Lennart Harnefors,Hans-Peter Nee +1 more
TL;DR: In this article, the internal model control (IMC) method is introduced and applied to AC machine current control, and it is shown that IMC is able to outperform PI control with and without decoupling with respect to dq variable interaction in the presence of parameter deviations.
Journal ArticleDOI
A New Synchronous Current Regulator and an Analysis of Current-Regulated PWM Inverters
TL;DR: In this article, a detailed model for the stationary and synchronous sine-triangle current regulators is presented, and the results demonstrate the limitations of the two most often used current regulators and the robustness of the synchronous current regulator.
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