Mitigation of supply &amp; load side disturbances in an AC Microgrid using UPQC

Gayatri, M.T.L.; Parimi, Alivelu M.

doi:10.1109/icpes.2016.7584116

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…The MG solves source and load compatibility difficulties and integrates energy sources and consumer loads with minimal conversion stages [23]. However, the problem of low power factor has been reported for many MG systems such as maritime MGs [24], MGs employing three-phase three-wire grid-connected inverters [25], MGs utilizing thyristor-based compensation (series or shunt) [26,27], and AC MGs integrating wind-energy systems [28].…”

Section: Problem Formulationmentioning

confidence: 99%

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

et al. 2023

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The issue of low-power factor operation microgrids was reported for several layouts. Although numerous power factor improvement strategies have been applied and tested, various concerns remain to be addressed such as transient performance, simplicity of implementation, and satisfying the power-quality standards. The presented research aimed to design and implement controllers that can improve the transient response of microgrids due to changes in the load demand and achieve a near-unity power factor at the AC grid side, to which the DC microgrid is connected. Due to the nonlinear nature of microgrids, as they rely on power electronics converters, a Fuzzy type 2 controller was designed, implemented, and tested. The focus was given to improving the power factor of the DC microgrids. The validation of the proposed technique was verified by comparing its performance with Fuzzy type 1 and autotuned conventional PI controllers. To achieve the set aims, two nested control loops were designed with an inner current loop and an outer voltage loop. Besides MATLAB/Simulink simulations, a 10 kHz-sampling dSPACE platform was used to implement the suggested system. Two operational scenarios were tested: (1) a step change in the DC link voltage and (2) a change in the AC load (increase and decrease) at the output of the power inverter, connected to the DC grid. The simulation and experimental results confirmed that the proposed Fuzzy type 2 controller performed better than the other two techniques regarding the dynamic response, steady-state error, and compliance with power quality standards. Conventional approaches develop controllers using a linearized model, which limits the model accuracy and ignores higher-order variability. The method employs the nonlinear model. Fuzzy type 2 can better approximate high-precision problems than Fuzzy type 1.

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Section: Problem Formulationmentioning

confidence: 99%

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

et al. 2023

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“…The use of a power electronic converter (PEC) for the interconnection of DG to the utility grid ensures the safe functioning of equipment and switching between sources. However, it introduces a wide range of PQ problems such as current and voltage harmonics, voltage sag/swell, voltage and current unbalance, voltage flicker, load reactive power, neutral current, impulse transients, and interruptions [15].…”

Section: Pq Phenomena Standardmentioning

confidence: 99%

Recent Trends in Power Quality Improvement: Review of the Unified Power Quality Conditioner

Gade

Agrawal

Munje³

2021

ECTI-EEC

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The electrical power sector is currently focusing on power quality (PQ) issues and their mitigation. Industrial automation and the use of power electronic converters for the integration of distributed generation create various PQ problems. This necessitates PQ enhancement, which in turn helps to improve the life span of the equipment as well as the reliability of supply for feeding critical loads within the system. This paper presents a comprehensive review of the Unified Power Quality Conditioner (UPQC) and its widespread application in the distribution system. The UPQC belongs to the family of active power filters. It contributes to the alleviation of voltage and current-related PQ issues along with power factor correction and the integration of renewable energy systems in the distribution network. This paper discusses various topologies, compensation methods, control theories, and the technological developments in recent years. More than 160 research papers have summarized the features of UPQC for further applications. Based on the outcomes of the investigation, the future direction of the UPQC is discussed. This paper is expected to play a major role in guiding research scholars in the application of the UPQC.

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“…The power factor compensation can also be provided on-board with the electronic circuit with low expenditures. [9][10][11][12].…”

Section: Wind Generator -Model Consideredmentioning

confidence: 99%

Regulation of Frequency and Load Flow Study in a Multi-Area Power System Under Contingencies with the Inclusion of Wind-Generation

Kumar¹,

Deepika²,

Venkateshwarlu³

2018

CVRJST

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A Sudden loss of a generating station and a sudden switching of heavy loads in the system are the major challenges for a power engineer. Coordinated scheduling of power is necessary to maintain the system parameters under control. In this paper a two-area power system is simulated for contingencies and the frequency deviation is controlled. The load flow studies are also conducted to study the behavior of the system. The results show that the variation of the frequency is within the allowable standards while the system is stable during the period.

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Mitigation of supply & load side disturbances in an AC Microgrid using UPQC

Cited by 11 publications

References 10 publications

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

Recent Trends in Power Quality Improvement: Review of the Unified Power Quality Conditioner

Regulation of Frequency and Load Flow Study in a Multi-Area Power System Under Contingencies with the Inclusion of Wind-Generation

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