Stability Analysis of a DC Power System

Carroll, D.P.; Krause, Paul C.

doi:10.1109/tpas.1970.292701

Cited by 21 publications

(10 citation statements)

References 7 publications

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“…The term is the sensing network transfer function which is normally considered to be a pure gain. In addition is the compensator transfer function and is the pulse-width modulator gain which is equal to 1 . The term represents the amplitude of the saw tooth waveform in the pulse width modulator.…”

Section: Closed -Loop Transfer Functionsmentioning

confidence: 99%

“…The increasing power demand in industrial and automotive applications, in addition to the voltage level specifications of power electronic devices used in these areas, account for the development of complex dc power supply distribution systems [1][2][3]. A distributed power system consists of smaller modules which are normally designed to meet their sole stability requirement without regard for possible interactions among modules employed in the power network.…”

Section: Introductionmentioning

confidence: 99%

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Analyzing stability issues in a cascaded converter system comprised of two voltage-mode controlled dc-dc converters

Ahmadi

Paschedag

Ferdowsi

2011

2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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This work analyzes the stability of a cascaded converter system comprised of two dc-dc converters operating with voltage-mode controllers. First it develops a single converter small-signal model and derives the mathematical representation of the converter from it. Next, it derives the required closed-loop transfer functions and input and output impedances from the model. Then, it develops the cascaded converter model based on the derived closed-loop impedances and the single converter model. Finally, it derives the cascaded converter system transfer function which addresses the stability of the system and analyzes the stability based on this transfer function.

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Section: Closed -Loop Transfer Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analyzing stability issues in a cascaded converter system comprised of two voltage-mode controlled dc-dc converters

Ahmadi

Paschedag

Ferdowsi

2011

2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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show abstract

“…Such model reductions are also studied in [8,9]. In [7], stability and control of such systems are treated as well, and in [10] the sensitivity of eigenvalues is studied and in [11] the Nyquist stability criterion is used to assure stability in DC power systems. When it comes to overall power plant control, functionalities for synchronizing gensets and for load sharing are important.…”

Section: Introductionmentioning

confidence: 99%

A real-time simulator framework for marine power plants with weak power grids

Skjong

Pedersen

2017

Mechatronics

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This work takes aim at presenting a generic real-time simulation framework for marine power plants with weak power grids, containing transient functionalities such as starting and stopping of arbitrary generators, and phase synchronization. The generator models used in the power plant are hybrid causality models, meaning that they have the ability to switch between causality orientations, between voltage and current. These models facilitate real-time simulations as long as they are solved properly, as will be discussed in this article. Much is devoted to numerical stability, model robustness and power plant control, e.g. rms voltage control, engine speed control, active-and reactive power sharing control and phase synchronization control. Some focus is also given to overall power plant control structure. A case study of a marine power plant including two generators and a fluctuating-and noisy power consumption is presented and analysed, and illustrates the advantages of the proposed framework as well as giving a good foundation for future works.

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“…The stability problem is one of the intriguing areas for researchers in academia and industry because of its high importance for the reliability of a dc network [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Improving performance of a DC-DC cascaded converter system using an extra feedback loop

Ahmadi

Ferdowsi

2013

2013 IEEE Energy Conversion Congress and Exposition

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This paper introduces the extra feedback method as a technique to improve the performance of a cascaded converter system and stabilize its operation. In this paper, first, the block diagram representation of the small-signal model of a single converter is presented. The open-loop and closed-loop transfer functions of this converter are provided in this stage as well. Next, the presented model is expanded to the block diagram model of a cascaded converter system comprised of two dc-dc converters. Then, the extra feedback method which is the main contribution of the paper is introduced. Some design guidelines for applying this method to an experimental cascaded converter system are provided in this part as well. Finally, some experimental results are provided to verify the theoretical outcomes.

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Stability Analysis of a DC Power System

Cited by 21 publications

References 7 publications

Analyzing stability issues in a cascaded converter system comprised of two voltage-mode controlled dc-dc converters

Analyzing stability issues in a cascaded converter system comprised of two voltage-mode controlled dc-dc converters

A real-time simulator framework for marine power plants with weak power grids

Improving performance of a DC-DC cascaded converter system using an extra feedback loop

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