An Active Voltage Stabilizer for a Generic DC Microgrid

Iyer, Vishnu Mahadeva; Gulur, Srinivas; Bhattacharya, Subhashish; Kikuchi, Jun; Sridharan, Srikanthan; Zou, Ke; Chen, Chingchi

doi:10.1109/ecce.2019.8912949

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…In addition, there will be some losses associated with the powerconverter-based stabilizer. The stabilizing power converter can be inserted in series with some of the existing converters in the DC MG [26], [27] or can be added as a shunt element [28]- [30]. Inserting a converter in series requires modification of the connection configurations within the existing MG, while the shunt configuration is less intrusive and is preferred in many applications.…”

Section: Introductionmentioning

confidence: 99%

“…The scope of this work is restricted to smallsignal model based stability assessment and active stabilization using the proposed stabilizer. An isolated shunt type active stabilizer that utilizes a capacitive ESS and its control was introduced and briefly discussed in the conference version of this work [30]. The key contributions of this article are given below.…”

Section: Introductionmentioning

confidence: 99%

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An Active Voltage Stabilizer for a DC Microgrid System

Iyer

Gulur²,

Bhattacharya

et al. 2021

IEEE Access

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This paper analyzes the low-frequency stability challenges that exist in a complex DC microgrid (MG) system. The converters that belong to a DC MG are categorized into different groups based on their control approach. The small-signal model of the DC MG is presented, and the conditions for system stability are derived. In some DC MG applications, there is the possibility of installing off-the-shelf converters with little flexibility and access for controller auto-tuning. To tackle this, a hardware-based active voltage stabilizer solution is proposed to stabilize the DC MG. The active stabilizer's functionality, based on an isolated bidirectional DC-DC converter, is elucidated, and a suitable control strategy is proposed. The active stabilizer and its associated control configuration involve only local voltage sensing and are non-intrusive. A dual active bridge (DAB) converter-based active stabilizer is implemented, and hardwarebased steady-state and transient experimental results from a DC MG test-bench are provided to validate the functionality and effectiveness of the proposed active stabilizer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Active Voltage Stabilizer for a DC Microgrid System

Iyer

Gulur²,

Bhattacharya

et al. 2021

IEEE Access

Self Cite

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show abstract

“…The idea of centralized stabilizer has been proposed in [26] for the modification of the source-side impedance. But in practice, the source-side converter is not decoupled from the rest of the network and the explicit form of its output impedance is not known for the stabilizer.…”

Section: Introductionmentioning

confidence: 99%

A DC Power System Stabilizer Based on Passivity-Oriented DC bus Impedance Shaping

Asbafkan

Mokhtari

2020

Scientia Iranica

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High penetration of Power Electronic (PE) converters in DC power grids has caused new stability challenges due to dynamic interactions among a network's subsystems. Dynamic interactions can be avoided by the impedance coordination between the subsystems through the modification of control loops or passive elements inside a grid. Impedance coordination is a very complex and time-consuming task with no adaptations to dynamic changes in a power grid. In this paper, the concepts of dynamic interaction and passivity are explained and combined together to provide an online stability measure in terms of the DC bus impedance characteristics. A novel DC Power System Stabilizer (PSS) is proposed which is connected to a DC bus as a separate module passivizing the bus impedance at non-passive interaction frequencies. The interaction frequencies are detected through a broadband online identification process. The PSS working principle, topology, modeling, and control designs are explained in detail. Finally, the functionality and performance of the proposed stabilizer are validated by simulation results.

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The smart performance optimization of self-reacted voltage stabilizer device using common line switch deviation model

Sharma

Saini

2022

2022 International Interdisciplinary Humanitarian Conference for Sustainability (IIHC)

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An Active Voltage Stabilizer for a Generic DC Microgrid

Cited by 3 publications

References 9 publications

An Active Voltage Stabilizer for a DC Microgrid System

An Active Voltage Stabilizer for a DC Microgrid System

A DC Power System Stabilizer Based on Passivity-Oriented DC bus Impedance Shaping

The smart performance optimization of self-reacted voltage stabilizer device using common line switch deviation model

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