Distributed virtual negative-sequence impedance control for accurate imbalance power sharing in islanded microgrids

Kim, Sunghyok; Hyon, Songchol; Kim, Chonung

doi:10.1016/j.segan.2018.04.001

Cited by 18 publications

(4 citation statements)

References 35 publications

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“…A distributed virtual NSIC based on consensus algorithm is used to suppress circulating currents and achieve better unbalance compensation in [97], which does not require the line impedance estimation. An active power oscillation cancellation strategy based on coefficients using secondary controls is discussed in [98] for parallel interlinking flow converters in a hybrid MG.…”

Section: Control Strategiesmentioning

confidence: 99%

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Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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Unbalance or asymmetry in the distribution network is a well-known power quality issue. In the modern active distribution system, with the increasing penetration of renewables, this phenomenon becomes more pronounced. In the context of microgrids (MGs), several works have been proposed for the management and mitigation of the unbalance, for both the sharing of unbalanced load and maintaining the voltage quality in the islanded mode and for the control of distributed generators in the grid-connected mode during unbalanced conditions. This study comprehensively reviews, summarises, and classifies the various strategies of the unbalance mitigation techniques for the islanded and grid-connected modes of operation for threephase MGs and presents the possible challenges and avenues for future investigations on the topic.

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Section: Control Strategiesmentioning

confidence: 99%

“…The objective of the unbalance compensation or mitigation depends upon the conditions of the MG and the operating mode (islanded or grid‐connected). Unbalance mitigation in islanded MGs [18, 21, 22, 23, 25, 27–32, …”

Section: Unbalance Mitigation In the Islanded Modementioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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“…Polylactic acid (PLA) is polyester with high strength and biocompatibility that is widely used in biomedical applications [4][5][6][7][8]. PLA is a biodegradable material made from renewable resources.…”

Section: Introductionmentioning

confidence: 99%

Poly(Lactic Acid) (PLA)-Based Nanocomposites: Impact of Vermiculite, Silver, and Graphene Oxide on Thermal Stability, Isothermal Crystallization, and Local Mechanical Behavior

et al. 2022

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The structural, thermal, and mechanical properties of unreinforced and reinforced polylactic acid (PLA) were investigated. The PLA was a biopolymer that was reinforced with four fillers (i.e., graphene oxide (GO) and silver (Ag); vermiculite (VMT) and silver (Ag); and two organically modified vermiculites). The processing technique for the production of the composite materials were carefully planned. The PLA nanocomposites were investigated by examining their morphological aspects, changes in PLA phases and transitions and, most importantly, the effect on certain final properties. X-ray diffraction and differential scanning calorimetry (DSC) analysis indicated that the sample was completely amorphous. Thermogravimetric analysis (TGA) results indicated that the presence of reinforcing particles in the PLA matrix did not affect the thermal degradation of these composites. Furthermore, the local mechanical properties were investigated using the microindentation method to evaluate the effect of different nanofillers. Scanning electron microscopy (SEM) and a VHX-500 optical digital microscope (Keyence International, Mechelen, Belgium) were also used to examine the surface morphology of the PLA polymer composites. These results can help to select suitable fillers to enhance the PLA performance of biopolymers.

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“…In this scheme, the harmonic power of the load has been calculated by using radial basis function neural networks, and a VI scheme has been utilised for sharing it. In [21], a VI scheme in negative sequence has been proposed for unbalanced power sharing, and the consensus algorithm has been used to adjust its parameters. In [22], a virtual capacitive scheme has been proposed for decreasing the voltage harmonics and sharing harmonic currents among DGs of a microgrid.…”

Section: Introductionmentioning

confidence: 99%

Voltage quality and load sharing improvement in islanded microgrids using distributed hierarchical control

Ghanizdeh

Gharehpetian

2019

IET Renewable Power Generation

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In this study, to compensate voltage unbalance and harmonics and improve load sharing, a distributed hierarchical control scheme is proposed for islanded microgrids. In the proposed scheme, a method is proposed, which can improve the voltage quality of sensitive load bus by determining the amount of effort made by each distributed generation (DG) and taking their rated power constraints into account for compensation. Moreover, this method is capable of improving the load sharing among DG units adaptively using circulating currents rule. Compared to the previous proposed methods, the method proposed in this study does not need a central controller, and communication is only needed between adjacent DG units. Furthermore, in this scheme, the contribution of each DG unit in compensation will be in proportion to its rated power, and none of them will be overloaded. Also, to compensate the error of load current sharing components, there is no need to have any information about impedance of DGs feeders and load type. To show the efficiency of the proposed scheme, simulation studies are performed on a typical islanded microgrid in MATLAB/Simulink environment.

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Distributed virtual negative-sequence impedance control for accurate imbalance power sharing in islanded microgrids

Cited by 18 publications

References 35 publications

Unbalance mitigation strategies in microgrids

Unbalance mitigation strategies in microgrids

Poly(Lactic Acid) (PLA)-Based Nanocomposites: Impact of Vermiculite, Silver, and Graphene Oxide on Thermal Stability, Isothermal Crystallization, and Local Mechanical Behavior

Voltage quality and load sharing improvement in islanded microgrids using distributed hierarchical control

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