Stability Region of Droop-Controlled Distributed Generation in Autonomous Microgrids

Pan, Yanfei; Chen, Laijun; Liu, Xiaonan; Wang, Jianhui; Liu, Feng; Mei, Shengwei

doi:10.1109/tsg.2018.2849084

Cited by 38 publications

(13 citation statements)

References 39 publications

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“…The small‐signal stability and transient stability have been neglected. The small‐signal stability of islanded microgrids with respect to the system operating condition is investigated in [139 ]. The frequency response of droop‐controlled inverters at steady state after islanding is considered in [140 ], where the droop control gains are co‐optimised with other control commands.…”

Section: Dg and Microgrid Assisted Resilience Enhancementmentioning

confidence: 99%

Resilient distribution system leveraging distributed generation and microgrids: a review

Liu

Jiang

Ollis

et al. 2020

IET Energy Systems Integration

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Section: Dg and Microgrid Assisted Resilience Enhancementmentioning

confidence: 99%

Resilient distribution system leveraging distributed generation and microgrids: a review

Liu

Jiang

Ollis

et al. 2020

IET Energy Systems Integration

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“…are defined as per the requirement of the network. P and Q are calculated with the terminal measurements as given in (1)- (4). In this work, Q ref * is set to be zero for unity power factor operation.…”

Section: B Application Of Critical Points For Different Scenarios 1)mentioning

confidence: 99%

Design and Expansion Planning of Parallel Inverter Based AC Microgrids - An Approach for Improved Stability Margins

Firdaus¹,

Molinas²

2020

Preprint

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<div>This paper presents an application of impedancebased modelling approach to identify suitable locations for design<br></div>and expansion planning of an inverter based autonomous AC microgrid. The objective is to find out ideal location for placement of additional components which can include new inverter-based sources, microgrid damping controller, etc., ensuring sufficient stability margins. These objectives are achieved by first identifying the weakest and the strongest nodes in the system with respect to the system stability and then observing the effects of choosing various nodes for design and expansion on overall system stability. The weakest and the strongest nodes are identified<br>using the impedance based stability analysis of the microgrid by dividing the system in various possible partition points while the impact of choosing different locations on stability is analyzed by eigen value analysis as well as time-domain MATLAB/Simulink simulations and experimental results. <div> <br><b>This paper has been submitted to JESTPE on 25-04-2020 and rejected on 29-08-2020.</b></div>

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“…Example of recent works on droop control can be found in [4]- [10]. It is also well known that the droop control has its drawbacks, and its main problem is the stability issues such as reported in [11]- [15]. The droop control needs to adjust its output frequency, and its severe changed frequency leads the system unstable.…”

Section: Introductionmentioning

confidence: 99%

Droop-free controls of inverter-based generator for use in systems that interconnected with synchronous generators

Janjornmanit

Panta

Nakkrongdee

2021

IJPEDS

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Because of its simplicity and autonomous operation, droop control technique is widely implemented for power generation control in microgrids. Despite its popularity, it has been reported that the technique has the stability problem. In this paper, the previous work of droop-free inverter-based generator designed for operating in a fix frequency islanded microgrid, is redesigned to have the ability to operate in both islanded and grid connected microgrid as well as to the main power grid where it interconnected with synchronous generators. The proposed voltage source inverters use phase locked loop(PLL) algorithm to synchronize the changing frequency due to the operation of the synchronous generator. Unlike the frequency droop control that the output frequency is varied as its active power changed, the proposed controls do not make an adjustment of the system frequency. This kind of operation reduces the chance of the system unstable due to severe frequency change and it also reduces the frequency deviation when it increases its active power output. Simulation and result of the meshed power network demonstrate the feasibility to implement the proposed controls in thereal system.

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Stability Region of Droop-Controlled Distributed Generation in Autonomous Microgrids

Cited by 38 publications

References 39 publications

Resilient distribution system leveraging distributed generation and microgrids: a review

Resilient distribution system leveraging distributed generation and microgrids: a review

Design and Expansion Planning of Parallel Inverter Based AC Microgrids - An Approach for Improved Stability Margins

Droop-free controls of inverter-based generator for use in systems that interconnected with synchronous generators

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