Active and Reactive Power Sharing in Inverter Based Droop-Controlled Microgrids

Bassey, Ogbonnaya; Butler‐Purry, Karen L.; Chen, Bo

doi:10.1109/pesgm40551.2019.8973854

Cited by 6 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DGs bidirectional power flow, follows droop control either in grid mode at PCC, for P, Q between grid and utility grid. This is determined by frequency and voltage droop [14] .…”

Section: Control Methodologymentioning

confidence: 99%

Robust Parallel Operated Inverters in Microgrid with SRF(Synchronous Reference Frame) – PLL(Phase Locked Loop) and SRF - Virtual Impedance Compensation Loop for Proportional Load Sharing

2019

IJEAT

View full text Add to dashboard Cite

Power flow control is most important in inverter interfaced Microgrids with highly penetrated DERs in islanded mode for their functionality to feed the connected loads. The different types of interfacing inverters connected to DERs, have been discussed for their principle of operation. The conventional inverters with droop control method of, P-f, Q-v alone failed to control with unequal line impedances. New inverters with SRFvirtual impedance compensation and SRF-phase locked loop along with droop characterstics have been implemented for defined functionalities in this paper. The design guidelines have been provided and the results are evaluated in Matlab/ Simulink platform to prove the effectiveness of the methodology.

show abstract

“…DGs bidirectional power flow, follows droop control either in grid mode at PCC, for P, Q between grid and utility grid. This is determined by frequency and voltage droop [14] .…”

Section: Control Methodologymentioning

confidence: 99%

Robust Parallel Operated Inverters in Microgrid with SRF(Synchronous Reference Frame) – PLL(Phase Locked Loop) and SRF - Virtual Impedance Compensation Loop for Proportional Load Sharing

2019

IJEAT

View full text Add to dashboard Cite

show abstract

“…For delta-connected loads, Equations ( 43)-( 46) are expressed similarly, with the phase voltages replaced by phase-to-phase voltages (i.e., the differences between the phase voltages). Given that (43) and ( 44) are implicitly written in per-phase base values, their equivalent expression for delta-connected loads in per phase base values should have correction factors of 1/3 and 1/ √ impedance and current terms, respectively. The current realized from the delta-connected loads using the equations above is then transformed to per-phase injection current using the relation below,…”

Section: Current Injection At Load Nodementioning

confidence: 99%

“…Analytical concerns are related to errors (such as linearization errors) in modeling the system, which could lead to power mismatch. Because of this power mismatch, the droop co-efficient plays a role in deciding how this mismatched power is shared among the droop-controlled DGs [43]. In addition, the droop coefficient plays a role in determining the stability of the system [44] and is thus an important parameter that affects the stable transition from one restoration step to the next.…”

Section: Solution Verification Using Pscad Simulation As Benchmarkmentioning

confidence: 99%

Black Start Restoration of Islanded Droop-Controlled Microgrids

Bassey

Butler‐Purry

2020

Energies

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…This causes rapid voltage changes (RVC) in the power supply, resulting in conducted EMI issues [4]- [6]. A well known concern in islanded or low inertia grids is the requirement to over-specify the electrical supply source to compensate for EMI, due to for instance voltage sags, caused by transients or cold start condition and inrush currents [7]- [9]. An example of this would be a vehicle carrying a complex microgrid system as a payload with a generator capacity of 40 kW [10].…”

Section: Introductionmentioning

confidence: 99%

Sub-Millisecond Transient Analysis with Multi-Point Measurement in Weak Grids

Matthee

Moonen

Leferink

2020

2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE

View full text Add to dashboard Cite

Peak loads determine the rated capacity of islanded grid power supplies. This often results in non-optimal running conditions in terms of cost, efficiency or size footprint. Presented in this paper is a method of in-depth analysis of very fast submillisecond transient behaviour performed between sub-systems and supply in a low-inertia grids. Using this method, time domain measurements can be analysed to potentially achieve electromagnetic compatibility. Synchronised current and voltage measurements are possible, with offsets in the sub-milliseconds and high sample rates of tens of Mega-samples per second. A demonstration of a weak grid is presented showing effects of linear and non-linear loads on the supply source and power quality.

show abstract

Active and Reactive Power Sharing in Inverter Based Droop-Controlled Microgrids

Cited by 6 publications

References 11 publications

Robust Parallel Operated Inverters in Microgrid with SRF(Synchronous Reference Frame) – PLL(Phase Locked Loop) and SRF - Virtual Impedance Compensation Loop for Proportional Load Sharing

Robust Parallel Operated Inverters in Microgrid with SRF(Synchronous Reference Frame) – PLL(Phase Locked Loop) and SRF - Virtual Impedance Compensation Loop for Proportional Load Sharing

Black Start Restoration of Islanded Droop-Controlled Microgrids

Sub-Millisecond Transient Analysis with Multi-Point Measurement in Weak Grids

Contact Info

Product

Resources

About