Efficient power sharing approach for photovoltaic generation based microgrids

Bhattacharya, Somesh; Mishra, Sukumar

doi:10.1049/iet-rpg.2015.0518

Cited by 22 publications

(17 citation statements)

References 21 publications

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“…Conventional P-f and Q-V droop control is more suitable for power sharing among DG sources in highly inductive nature of distribution network whereas a modified or reverse P-V and Q-f droop power sharing control is applicable for VSI of DG sources in MG power system with resistive nature of LV network [16] [17]. This type of modified or reverse droop control for MG power system with resistive nature of LV network is the subject of interest to this study.…”

Section: Power Sharing Control In the Mg Networkmentioning

confidence: 99%

“…In this study, in order to enhance the stability of inverter current controller that the decoupling operation through current feed forward compensation has been adopted by considering inverter reference currents (i dref , i qref ) instead of output [36]. As per the control configuration of current control loop with inclusion of feed forward system which is shown in Figure 6, the inverter output voltage signals of current control loop can be expressed as per Equation (16).…”

Section: Voltage and Current Control Loopmentioning

confidence: 99%

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PV Based Microgrid with Grid-Support Grid-Forming Inverter Control-(Simulation and Analysis)

Vinayagam¹,

Swarna²,

Khoo³

et al. 2017

SGRE

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Microgrid (MG) is a small entity of electrical network which comprises of various Distributed Generation (DG) sources, storage devices, and group of loads in various classes. MG provides reliable and secure energy supply to the critical loads of communities while operating either in on-grid or off-grid mode. In this study, a coordinated power management control strategy for a typical low voltage (LV) MG network with integration of solar Photovoltaic (PV) and storage facility has been developed and analysed in Matlab-Simulink software environment at various modes (on-grid, off-grid, and on-grid to off-grid transition) of MG operation. Solar PV and battery power inverters are considered as grid-support grid-forming (GsGfm) Voltage Source Inverter (VSI) with the implementation of modified droop and virtual output impedance control strategies. Proposed control strategy supports coordinated control operation between PV units and battery storage, equal power sharing among the DG sources, and smooth MG mode transition with regulation of voltage and frequency level in MG network. In addition, voltage and current THD level were analysed and verified as per the standard of AS4777.

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Section: Power Sharing Control In the Mg Networkmentioning

confidence: 99%

Section: Voltage and Current Control Loopmentioning

confidence: 99%

PV Based Microgrid with Grid-Support Grid-Forming Inverter Control-(Simulation and Analysis)

Vinayagam¹,

Swarna²,

Khoo³

et al. 2017

SGRE

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show abstract

“…A similar configuration as that of [70] was used by Wu et al in [71], where the power regulation was carried out in decentralized manner by tracking the bus frequency. It is important to note that the conventional P-f and Q-V droop control is more suitable for power-sharing among DG sources in highly inductive nature of distribution network whereas a modified or reverse P-V and Q-f droop power sharing control is applicable for VSI of the DG sources in MG power system with resistive nature of low voltage network [72], [73]. The mentioned droop controllers assigned the amount of powersharing for load changes automatically without any dedicated communication link.…”

Section: B Mg Active and Reactive Power Controlmentioning

confidence: 99%

Swarm Intelligence-Based Optimization Techniques for Dynamic Response and Power Quality Enhancement of AC Microgrids: A Comprehensive Review

et al. 2020

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The increasing penetration of Microgrids (MGs) into existing power systems and ''plug and play'' capability of Distributed Generators (DGs) causes large overshoots and settling times along with various power quality issues such as voltage and frequency flickers, current harmonics and short current transients. In this context, over the past few years, considerable research has been undertaken to investigate and address the mentioned issues using different control schemes in conjunction with soft computational techniques. The recent trends and advancements in the field of Artificial Intelligence (AI) have led the development of Swarm Intelligence (SI) based optimized controllers for smooth Renewable Energy Sources (RES) penetration and optimal voltage, frequency, and power-sharing regulation. Moreover, the recent studies have proved that the SI-based controllers provide enhanced dynamic response, optimized power quality and improved the dynamic stability of the MG systems as compared to the conventional control methods. Their importance in modern AC MG architectures can be judged from the growing number of publications in the recent past. However, literature, pertaining to SI applications to AC MG, is scattered with no comprehensive review on this significant development. As such, this study provides an overview of 15 different SI optimization techniques as applied to AC MG controls from 43 research publications including a detailed review of one of the elementary and most widely used SI based metaheuristic optimization algorithms called Particle Swarm Optimization (PSO) algorithm. This comprehensive review provides a valuable one-stop source of knowledge for the researchers and experts working on SI controller's applications for AC MG dynamic response and power quality improvements.

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“…Enhancing the voltage quality is of the most essential tasks to be done in controlling islanded microgrids. Making power sharing accurate is the other essential task in this control field [24][25][26].…”

Section: Hierarchical Structure Of the Controlmentioning

confidence: 99%

Improved secondary control for optimal total harmonic distortion compensation of parallel connected DGs in islanded microgrids

2019

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This study proposes a two-layer hierarchical control to actualize optimal total harmonic distortion (THD) compensation in different buses of parallel-connected inverters in islanded microgrids which had not been studied so far. The proposed secondary layer is used to realize THD compensation of sensitive load bus (SLB) and make distributed generators (DGs) distribute the compensating efforts between them according to their rated capacity. It is noteworthy that improving THD at the SLB can lead to an increase in THD at local buses and/or DG terminals. Although the THD limitations of these buses are not as strict as the THD limitation of SLB, it is necessary to control them within their allowed range. This important problem is not well studied in the literature. A novel complementary part is designed and added to the secondary control to tune the compensation portion of each DG while the THD limitations in DG terminals and local buses are considered. The proposed method actualizes a multi-level voltage quality control in multi-bus islanded microgrids with parallel DGs through a simple yet effective solution. Furthermore, considering the DGs peak current limitation is added to the controller and a method for calculating this peak value is proposed.

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Efficient power sharing approach for photovoltaic generation based microgrids

Cited by 22 publications

References 21 publications

PV Based Microgrid with Grid-Support Grid-Forming Inverter Control-(Simulation and Analysis)

PV Based Microgrid with Grid-Support Grid-Forming Inverter Control-(Simulation and Analysis)

Swarm Intelligence-Based Optimization Techniques for Dynamic Response and Power Quality Enhancement of AC Microgrids: A Comprehensive Review

Improved secondary control for optimal total harmonic distortion compensation of parallel connected DGs in islanded microgrids

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