A Unified Droop-Free Distributed Secondary Control for Grid-Following and Grid-Forming Inverters in AC Microgrids

Mohiuddin, Sheik M.; Qi, Junjian

doi:10.1109/pesgm41954.2020.9282042

Cited by 12 publications

(3 citation statements)

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“…Presently, most research on cooperative control strategies for dual inverters primarily centers around microgrids [18]- [22]. A distributed control scheme based on range consensus is proposed for voltage regulation [20], using power coupling and an extended state observer to reconcile the disparate internal dynamics and control structures of the inverters.…”

Section: A Related Workmentioning

confidence: 99%

“…Consensus control is also the most widely adopted cooperative control strategy for GFM and GFL inverters. Given that droop control can lead to steadystate voltage/frequency deviations under nonlinear loads, a unified droop-free distributed secondary control framework for GFM and GFL inverters is proposed [22]. This scheme targets achieving zero frequency and voltage deviations and achieving proportional sharing of active and reactive power among all inverters, with control links designed based on the partial derivatives of the objective function.…”

Section: A Related Workmentioning

confidence: 99%

“…Ideally, droop control would facilitate multiple inverters in power distribution according to capacity, without the need for communication. However, due to line impedance, load fluctuation, and other factors, achieving precise power distribution is a practical challenge [22]. Therefore, in scenarios of large-scale inverter grid integration, traditional droop control isn't applicable.…”

Section: Mean Field Games Architecture For Gfm-gfl Coordinationmentioning

confidence: 99%

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Active Power Coordination for a Large Population of Grid-Forming and Grid-Following Inverters Based on Mean Field Games Theory

Xu,

Chu,

2023

IEEE Access

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In a grid with a high proportion of renewable energy, the coordinated control between gridforming (GFM) and grid-following (GFL) inverters becomes crucial for maintaining aspects such as frequency and voltage regulation. This paper presents a decentralized competitive power coordination scheme, designed for a large-scale networked inverter system based on the Mean Field Games (MFG) concept. This scheme effectively harmonizes GFM and GFL inverters to achieve both frequency recovery and active power distribution within the distribution network. Each inverter devises its optimal active power control strategy by maximizing a frequency-constrained revenue function. Through the market price, each inverter's control strategy influences others' strategies. Importantly, this scheme simplifies the interaction among inverters by averaging the impacts generated by each inverter's control strategies. For the MFG control scheme, a decentralized policy iteration algorithm is proposed, eliminating the need for information exchange between inverters and significantly decreasing the communication burden. The effectiveness of the proposed control framework is corroborated using the IEEE 33 test system.INDEX TERMS Active power coordination, frequency regulation, grid-forming, grid-following, mean field games.

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Section: A Related Workmentioning

confidence: 99%

Section: A Related Workmentioning

confidence: 99%

Section: Mean Field Games Architecture For Gfm-gfl Coordinationmentioning

confidence: 99%

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