Novel reduced-order small-signal model of a three-phase PWM rectifier and its application in control design and system analysis

Mao, Hengchun; Boroyevich, Dushan; Lee, F.C.Y.

doi:10.1109/63.668114

Cited by 134 publications

(7 citation statements)

References 8 publications

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“…Power dispatching of energy system forces the grid connected converter to operate under regulated power flow, which is a typical scenario [7,8]. When power dispatching requires bidirectional power flow mode, the stability of grid-connected converter is essentially in pace with power flow variations [9].…”

Section: Introductionmentioning

confidence: 99%

A grid voltage perturbations based bidirectional impedance uniform control for grid‐connected DC/AC converter

Liu,

Ding,

Peng

et al. 2023

IET Renewable Power Gen

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For bidirectional grid‐connected DC/AC converters, the power flow variation substantially alters the system stability, and especially severs under heavy load. Towards this problem, this paper proposes a novel impedance uniform control method to eliminate the stability degradation under power flow variations, which is achieved by reshaping the converter negative incremental impedance to resistive in the stability fragile mode. The d‐axis voltage perturbation is extracted to dynamically modify the active power current reference. Hence, the system bidirectional damping performance can be simultaneously improved by this dedicated design. Without switching control modes or sacrificing dynamic performance, the grid‐connected converter system can maintain satisfied stability under bidirectional power flow variations. Finally, the effectiveness of the proposed control method has been validated by both simulations and experiments.

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Section: Introductionmentioning

confidence: 99%

A grid voltage perturbations based bidirectional impedance uniform control for grid‐connected DC/AC converter

Liu,

Ding,

Peng

et al. 2023

IET Renewable Power Gen

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show abstract

“…Several papers have reported small-signal input impedance modeling methods for PWM rectifiers. These include the method based on dq transformation for three-phase PWM rectifiers [3][4][5], and the reduced-order modeling method for single-phase PFC converters [6][7][8]. Output impedance of line-commutated rectifiers has also been studied in several publications.…”

Section: Introductionmentioning

confidence: 99%

Input Impedance Modeling and Analysis of Line-Commutated Rectifiers

Bing

Karimi

Sun

2007

2007 IEEE Power Electronics Specialists Conference

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This paper presents the modeling and analysis of small-signal input impedance for line-commutated rectifiers. The recently developed impedance mapping method, which has been applied to single-phase rectifiers with sinusoidal line inputs, is generalized to single-phase rectifiers with distorted lines as well as three-phase rectifiers. The modeling method assumes known impedance of the circuit on the dc side of the rectifier bridge (including its output filter and the load), and determines the corresponding ac input impedance by using a current and voltage mapping function which describes the operation of the rectifier bridge in the frequency domain. In this approach, closed-form analytical expressions are derived for the ac input impedance as functions of the dc circuit impedance. The resulting models are intended for stability analysis and design of large ac power systems involving significant number of rectification loads, such as more-electric aircraft power systems and microgrids. Detailed derivation of the models is presented in this paper. Numerical simulation and experimental measurement results are also presented to validate the derived models.

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“…However, state-space averaging modeling approaches are limited to low-order systems with a few reactive elements because the manipulating matrixes are too complex in high-order systems [7]. Some approaches are proposed to simplify the modeling development process [7] [8] [9]. This paper proposes two equivalent approaches in frequency domain that may greatly simplify the modeling process of three-phase power converters.…”

Section: Introductionmentioning

confidence: 99%

Frequency-domain transformation approaches to develop the d-q synchronous-frame models of three-phase symmetrical networks and applications in modeling of PWM power converters

Wang

Liu

et al. 2007

2007 7th Internatonal Conference on Power Electronics

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Although state-space averaging small-signal modeling techniques are successfully established in DC-DC converters and three-phase sinusoidal PWM converters, these approaches are limited only to low-order systems, and the modeling process is very complex. This paper proposes two equivalent approaches in frequency domain to develop the d-q synchronous-frame models from stationary-frame models for arbitrary three-phase symmetrical circuits. The first modeling approach is illustrated with frequency transformation, by which the target synchronous-frame models could be easily obtaine.d by frequency transformation of the prototype stationary-frame models. The second modeling approach is based on the reactive elements substitutions. These two approaches can be proven to be equivalent, and the first approach is suitable for input-output models, while the second approach is preferable for state-space models. As illustrative examples, these approaches are applied to develop the synchronous-frame models of large three-phase systems with PWM converters. They are proven valid with the com parison with current published models.1.

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Novel reduced-order small-signal model of a three-phase PWM rectifier and its application in control design and system analysis

Cited by 134 publications

References 8 publications

A grid voltage perturbations based bidirectional impedance uniform control for grid‐connected DC/AC converter

A grid voltage perturbations based bidirectional impedance uniform control for grid‐connected DC/AC converter

Input Impedance Modeling and Analysis of Line-Commutated Rectifiers

Frequency-domain transformation approaches to develop the d-q synchronous-frame models of three-phase symmetrical networks and applications in modeling of PWM power converters

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