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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Journal ArticleDOI
On the Equivalence and Impact on Stability of Impedance Modeling of Power Electronic Converters in Different Domains
TL;DR: In this article, it is shown that the modified sequence domain model can be derived from the dq-domain model, and vice versa, and that the stability analysis will be identical in these two two domains.
Journal ArticleDOI
Multilevel dynamic voltage restorer
TL;DR: In this article, a high voltage dynamic voltage restorer (HVDVR) is implemented using a multilevel inverter topology with isolated DC energy storage to compensate for sags in utility voltages.
Journal ArticleDOI
Delta operator digital filters for high performance inverter applications
TL;DR: In this paper, the delta operator is used for power electronic inverter applications to achieve substantial performance benefits compared to equivalent shift-based implementations, and a brief review of shift based IIR filtering is presented and the required conversions to the delta form given.
Journal ArticleDOI
A Source-Current-Detected Shunt Active Power Filter Control Scheme Based on Vector Resonant Controller
TL;DR: In this paper, a source current detection control scheme is proposed, which employs a vector resonant controller, with which the shunt active power filter performs as an equivalent multiband rejection filter that series between nonlinear loads and the grid source, blocking selected harmonics components from the load side flowing into the source side.
Journal ArticleDOI
Low-Frequency Stability Analysis of Single-Phase System With dq -Frame Impedance Approach—Part I: Impedance Modeling and Verification
TL;DR: The dq-frame impedance measurement method for single-phase systems based on the Hilbert transform is proposed, and the modeling approach is verified by the frequency-domain simulations on the switching models.
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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