Energy Management in Autonomous Microgrid Using Stability-Constrained Droop Control of Inverters

Barklund, E.; Pogaku, N.; Prodanović, Milan; Hernandez-Aramburo, C.A.; Green, Tim

doi:10.1109/tpel.2008.2001910

Cited by 659 publications

(358 citation statements)

References 15 publications

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“…such that all trajectories of the system (9), (1) converge to the synchronized motion (17) (up to a uniform shift of all angles). To establish this result we make the important observation that the dependence with respect to δ of the dynamics (9), (1) is via angle differences δ ik .…”

Section: Error Dynamicsmentioning

confidence: 99%

“…Lemma 6.2. Consider the system (9), (1). Assume that it possesses a synchronized motion with synchronization frequency ω s ∈ R. Then all inverters the power outputs of which satisfy sign(P s i ) = sign(P s k ), achieve proportional active power sharing if the gains k Pi and k P k and the active power setpoints P d i and P d k are chosen such that…”

Section: Active Power Sharingmentioning

confidence: 99%

“…Note that proportional active power sharing is achieved by Lemma 6.2 independently of the admittance values of the network. However, in a highly ohmic network, the droop control laws (4) may induce high fluctuating currents due to the stronger coupling of phase angles and reactive power, see (1). Then, additional methods such as the virtual output impedance [17] or alternative droop control laws [43] could be employed instead of (4).…”

Section: Active Power Sharingmentioning

confidence: 99%

“…Compared to the model given by (1) and (9) used for the analysis, the inductances are represented by first-order ODEs in the model used for the simulations rather than constants as in (1). Hence, the simulations also serve to evaluate the validity of the model (9), (1), as well as the robustness of the stability condition (31) with respect to model uncertainties.…”

Section: Simulation Examplementioning

confidence: 99%

“…Stability analysis of droop-controlled microgrids has traditionally been carried out by means of detailed numerical small-signal analysis as well as extensive simulations and experimental studies aiming to characterize a range for the droop gains guaranteeing system stability [4,40,32,1]. As pointed out in [15], most work on microgrid stability has so far focussed on radial microgrids, while stability of microgrids with meshed topologies and decentralized controlled units is still an open research area.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Conditions for stability of droop-controlled inverter-based microgrids

Schiffer¹,

Ortega²,

Astolfi³

et al. 2014

Automatica

384

367

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We consider the problem of stability analysis for droop-controlled inverter-based microgrids with meshed topologies. The inverter models include variable frequencies as well as voltage amplitudes. Conditions on the tuning gains and setpoints for frequency and voltage stability, together with desired active power sharing, are derived in the paper. First, we prove that for all practical choices of these parameters global boundedness of trajectories is ensured. Subsequently, assuming the microgrid is lossless, a port-Hamiltonian description is derived, from which sufficient conditions for stability are given. Finally, we propose for generic lossy microgrids a design criterion for the controller gains and setpoints such that a desired steady-state active power distribution is achieved. The analysis is validated via simulation on a microgrid based on the CIGRE (Conseil International des Grands Réseaux Electriques) benchmark medium voltage distribution network.

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Section: Error Dynamicsmentioning

confidence: 99%

Section: Active Power Sharingmentioning

confidence: 99%

Section: Active Power Sharingmentioning

confidence: 99%

Section: Simulation Examplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Conditions for stability of droop-controlled inverter-based microgrids

Schiffer¹,

Ortega²,

Astolfi³

et al. 2014

Automatica

384

367

View full text Add to dashboard Cite

show abstract

A comprehensive review on control techniques for stability improvement in microgrids

Mehta

Basak

2021

Int Trans Electr Energ Syst

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In recent times, with the increase in the penetration of various renewable energy sources (RESs) into power systems, the complications related to the stability issues have increased. The main contribution of this paper is an in‐depth analysis of research in microgrid based on small‐signal, transient, and voltage stability. The small‐signal stability has been discussed based on uncertain load, limitation in power generation capacity, and nature of sluggish feedback observed in few microgrid systems. Instability caused by a transient phenomenon in microgrid has been thoroughly analyzed for losses in distributed energy resources (DERs), islanding and transition modes of operation, load shedding, and faults causing instability. The voltage fluctuations are duly considered in the perspective of load shedding, type of loads, power unbalancing, and different types of faults in microgrid systems. The existing controllers have been compared based on steady‐state error, response time, and robustness etc. The voltage, frequency, and active/reactive power control are analyzed based on centralized, decentralized, hierarchal/distributed control schemes aiming stabilization of microgrid systems. Finally, stability improvement features have been explored in detail, finding the implementation of microgrid stabilizers, energy storage devices, FACTS devices, load balancing, resource forecasting including the adaptive controller. Hence, the uniqueness of this paper can be considered as a state‐of‐the‐art review of the abovementioned stability components in the microgrid system which is not available in the published literature with a similar amount of vastness.

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References

2012

Control of Power Inverters in Renewable Energy and Smart Grid Integration

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Energy Management in Autonomous Microgrid Using Stability-Constrained Droop Control of Inverters

Abstract: This paper presents an Energy Management System (EMS

Cited by 659 publications

References 15 publications

Conditions for stability of droop-controlled inverter-based microgrids

Conditions for stability of droop-controlled inverter-based microgrids

A comprehensive review on control techniques for stability improvement in microgrids

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