Modeling Single-Phase PQ Inverter for Unbalanced Power Dispatch in Islanded Microgrid

Bassey, Ogbonnaya; Butler‐Purry, Karen L.

doi:10.1109/tpec.2019.8662149

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…At each phase of the node of a droop-controlled DG, the RHSs of Equations ( 30) and ( 31) can be expressed by substituting the power injection terms in (35) and (36) with the reference power variables (assuming reference power operation for the droop DGs) of the droop DGs as follows:…”

Section: Current Injection At Droop Nodesmentioning

confidence: 99%

“…The derivation for the current injection at the load node follows similar steps as the current injection derived for the droop nodes in Section 4.6.3. This derivation is by plugging the ZIP load expressions of ( 43) and ( 44) into (35) and (36) and then linearizing the resulting voltage quotients using (40) 46) give bilinear terms which were linearized according to the same approach described in Section 4.6.1, Equations ( 32) and (33).…”

Section: Current Injection At Load Nodementioning

confidence: 99%

“…These constraints apply only to the droop-controlled DGs. The droop-controlled DGs are three-phase controlled, and unbalanced loading negatively affects their controller and hence can lead to significant voltage unbalance in the system [35,36]. Therefore, it is desirable that the output power of the three phases be approximately balanced.…”

Section: Dg Power Unbalance Constraintsmentioning

confidence: 99%

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Black Start Restoration of Islanded Droop-Controlled Microgrids

Bassey

Butler‐Purry

2020

Energies

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The electricity grid faces the possibility of outages due to extreme weather events, cyber-attack, and unexpected events. When these unwanted events occur, it is desired that electricity be restored as soon as possible to meet the power demands of critical loads. The microgrid approach to power restoration holds a lot of promise, since microgrids can operate in island mode. This paper presents a novel sequential restoration methodology for microgrid black start. The microgrid architecture considered is assumed to be operating in multi-master mode. The master distributed generators (DGs) are coordinated to operate together through droop control. Several operational constraints are formulated and linearized to realize a mixed-integer linear programming (MILP) problem. The method is studied on an islanded microgrid based on a modified IEEE 13 node test feeder. Detailed transient simulation in PSCAD was used to verify the accuracy of the restoration methodology. The developed restoration method can maximize the energy restored while ensuring good voltage and frequency regulation, and ensure that power scheduling mismatch is shared in the desired proportion.

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Section: Current Injection At Droop Nodesmentioning

confidence: 99%

Section: Current Injection At Load Nodementioning

confidence: 99%

Section: Dg Power Unbalance Constraintsmentioning

confidence: 99%

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Black Start Restoration of Islanded Droop-Controlled Microgrids

Bassey

Butler‐Purry

2020

Energies

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“…The basic the release of such delay in the system will reduce the dynamic response which will slow down accordingly sway. Nevertheless, using a D-Q controller that does not need to create a perpendicular phase signal makes it easier to operate [3][4][5][6][7][8][9]. The current control scheme for the inverter with a D-Q frame connecting to a single-phase grid, signal blocks are required orthogonal (OSQ) to create a perpendicular virtual signal.…”

Section: Introductionmentioning

confidence: 99%

Optimized D-Q Vector Control of Single-Phase Grid-Connected Inverter for Photovoltaic System

Chaithanakulwat¹,

Thungsuk²,

Savangboon³

et al. 2021

JESA

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This paper presents the control of grid-connected single-phase inverters with vector control technology based on the D-Q spindle reference frame for photovoltaic systems. This method begins with converting the grid current of the reference sinusoidal signal to a 90degree phase angle and converting it to a DC signal using the clack conversion principle. The aim of this research is to control the current amount of the D-axis vector and adjust the motion angle lag and lead the Q-axis vector. This mechanism control technology uses a microcontroller TMS3020F28379D This allows control of the inverter modulation to supply active and reactive power to the grid. As a result, the power factor in the system can be controlled close to unity. The simulation results using MATLAB / Simulink, compared to the prototype mechanism can confirm satisfactory accuracy.

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