Comparative Analysis of the Fault Ride-Through Capabilities of the VSG Methods of Microgrid Inverter Control under Faults

Buraimoh, Elutunji; Davidson, Innocent E.

doi:10.1109/robomech.2019.8704754

Cited by 8 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, these references are properly restored immediately fault condition is over with appropriate tuning of the kp and ki gains of the proportional-integral controllers. Thus, Figure 10 reveals a smooth transition from pre-fault to fault and subsequently, from The prompt current amplitude limitation is provided by the secondary power reference embedded in the FRT scheme of the secondary control in each of the DER as shown the Figure 5 and depicted by the Equations (9) and (23). The active and reactive current references are changed instantaneously at fault inception.…”

Section: Resultsmentioning

confidence: 99%

“…For balanced voltage sag, the main grid fault; triple-phase to ground is used to simulate voltage sag of 50% in eva which prompts a corresponding rise in the current amplitude. The prompt current amplitude limitation is provided by the secondary power reference embedded in the FRT scheme of the secondary control in each of the DER as shown the Figure 5 and depicted by the Equations (9) and (23). The active and reactive current references are changed instantaneously at fault inception.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, due to the reactive power (current) injection, the active power (current) injection is limited. Thus, the reference P* for the inverter active power is computed using the Equations (23).…”

Section: Active Power Referencing and Fault Current Limitingmentioning

confidence: 99%

“…During fault or voltage sag, this will alleviate the potential instability by ensuring the active power delivery to local microgrid loads and reactive power support to the host grid. Avoiding the disconnection of high capacity MGs during grid fault or any disturbance forestalls potential network instabilities [23]. As a result, some developed countries have amended their respective grid codes to make provisions for rising RES capacity.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

2019

Self Cite

View full text Add to dashboard Cite

The growing level of grid-connected renewable energy sources in the form of microgrids has made it highly imperative for grid-connected microgrids to contribute to the overall system stability. Consequently, secondary services which include the fault ride-through (FRT) capability are expected to be possessed characteristics by inverter-based microgrids. This enhances the stable operation of the main grid and sustained microgrid grid interconnection during grid faults in conformity with the emerging national grid codes. This paper proposes an effective FRT secondary control strategy to coordinate power injection during balanced and unbalanced fault conditions. This complements the primary control to form a two-layer hierarchical control structure in the microgrids. The primary level is comprised of voltage/power and current inner loops fed by a droop control. The droop control coordinates grid power-sharing amongst the voltage source inverters. When a fault occurs, the participating inverters operate to support the grid voltage, by injecting supplementary reactive power based on their droop gains. Similarly, under unbalanced voltage condition due to asymmetrical faults in the grid, the proposed secondary control ensures the positive sequence component compensation and negative and zero sequence components clearance using a delayed signal cancellation (DSC) algorithm and power electronic switched series impedance placed in-between the point of common coupling (PCC) and the main grid. While ensuring that FRT ancillary service is rendered to the main utility, the strategy proposed ensures relatively interrupted quality power is supplied to the microgrid load. Consequently, this strategy ensures the microgrid ride-through the voltage sag and supports the grid utility voltage during the period of the main utility grid fault. Results of the study are presented and discussed.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Active Power Referencing and Fault Current Limitingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Virtual inertia method is an enhanced version on the traditional VSG technique to provide an artificial inertia support for a grid feeding or grid forming or grid supporting inverter. The two approaches; voltage-source-based and current-source-based for virtual inertia methods were proposed by IEPE as graphically explained in the Figures 1 and 2 [17] [18]. The method 1 generates a current reference using the measured grid voltage at the PCC.…”

Section: Virtual Inertia Machine Methodsmentioning

confidence: 99%

Investigation of the Low Voltage Ride-Through of Inverter Using Virtual Inertia Methods in Microgrid

Buraimoh

Davidson

2019

JERA

Self Cite

View full text Add to dashboard Cite

Inverter based Distributed Energy Resources lack the inertia and damping features of synchronous generators dominated traditional power system. The growing penetration of renewable energy technologies coupled with their inherent intermittency also constitute grid instability challenge due to insignificant inertia and damping. The virtual inertia machine methods for the control of inverter based Distributed Energy Resources present the required inertia support that mimics the dynamic performance of a typical synchronous generator. These control methods provide excellent improvement in the stability of the grid. Several studies and implementations have been carried out on providing virtual inertia support for inverters in steady-state and under balanced grid voltage, however there is a need to investigate the dynamic performances during voltage sags occasioned by faults and other grid transients. Due to the low overvoltage and overcurrent tolerance capabilities of inverters, this investigation is important to observe the inverter transient behavior while ensuring the protection of constituent power electronic switches. Consequently, this work carried out an investigation to assess the two methods of Virtual Inertia Machine in ensuring the inverter sustained grid connection in compliance with grid codes, fault current limitation and fault recovery.

show abstract

Study on the Use of Virtual Synchronous Generators to Improve Large Scale System’s Stability

Sitompul

Fujita

2021

2021 3rd International Conference on High Voltage Engineering and Power Systems (ICHVEPS)

View full text Add to dashboard Cite

Comparative Analysis of the Fault Ride-Through Capabilities of the VSG Methods of Microgrid Inverter Control under Faults

Cited by 8 publications

References 16 publications

Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

Investigation of the Low Voltage Ride-Through of Inverter Using Virtual Inertia Methods in Microgrid

Study on the Use of Virtual Synchronous Generators to Improve Large Scale System’s Stability

Contact Info

Product

Resources

About