Power quality issues of smart microgrids: applied techniques and decision making analysis

Naderi, Yahya; Hosseini, Seyed Hossein; Zadeh, Saeid Ghassem; Mohammadi‐Ivatloo, Behnam; Savaghebi, Mehdi; Vasquez, Juan C.; Guerrero, Josep M.

doi:10.1016/b978-0-12-816445-7.00004-9

Cited by 26 publications

(16 citation statements)

References 30 publications

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“…The probability distribution function (PDF) of the PV module output power has been considered to be a Weibull distribution. 26 Without making any difficult assumptions regarding the type of PV cells used, NLLs which are considered one of the main sources of power quality issues 27 are connected to the microgrids. We simulated 30 Ω and 120 Ω NLLs.…”

Section: -Phase Grid-connected Inverter (Gci) Unitmentioning

confidence: 99%

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A hybrid voltage‐current compensator using a synchronous reference frame technique for grid‐connected microgrid under nonlinear load conditions

Khidrani

Habibuddin

Mustafa

et al. 2020

Int Trans Electr Energ Syst

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Power quality is important for the reliable operation of power grids. Unwanted harmonics cause serious degradation of power quality. This problem is more obvious for distributed generations connected to a microgrid. To solve this issue, this paper proposes an improved voltage and current (VI) compensator to collectively suppress voltage and current harmonics in a three-phase hybrid fuel cell and photovoltaic grid-connected inverters using a synchronous reference frame (SRF) based technique in the presence of non-linear loads. It is shown that the proposed compensator can effectively reduce the harmonic contents in voltage and current without any dependence on offset devices such as active and passive filters. Simulations in MATLAB/Simulink show that the proposed control strategy not only reduces the total harmonic distortion to less than 5% (as per the IEEE 519 standard) but also results in the least total harmonic distortion (THD) as compared to existing techniques. K E Y W O R D S current/voltage compensation, power quality, power system harmonics 1 | INTRODUCTION In the past few decades, photovoltaic (PV) and fuel cell (FC) systems have gained much popularity and have been successfully integrated with microgrids (MG) and utility networks through interface converters. 1 One of the most common power quality issues is the presence of unwanted harmonics in voltage and current. These problems are commonly attributed to non-linear loads (NLL) and interface converters, that is, grid-connective inverters (GCI) for distributed generations. 2,3 Interface converters form an integral part for interfacing renewable energy (RE) sources to the grid.

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Section: -Phase Grid-connected Inverter (Gci) Unitmentioning

confidence: 99%

“…The major components of the EVIR compensator like amplifier, exciter, generator, and sensor, are taken as linear devices to make their mathematical modeling process more tractable. For example, the transfer function model for an amplifier is represented by a time constant as follows 4,26 :…”

Section: Compensator Tuningmentioning

confidence: 99%

A hybrid voltage‐current compensator using a synchronous reference frame technique for grid‐connected microgrid under nonlinear load conditions

Khidrani

Habibuddin

Mustafa

et al. 2020

Int Trans Electr Energ Syst

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“…Hence, in such situation a UPS Systems are immediate and best solution for secure and reliable power but at the same time the also cause power loss ranging from 7% to 20% due UPS System harmonics. The consumer, end users of different industries and sectors if use the filtering techniques like EMI, Passive, Active Power Filters [9][10][11][12][13][14][15][16] and combination of both HAPF [17][18][19][20][21][22][23][24] that could save the power loss. It could be more effective and efficient to rectify THD with the proposed HAPF for UPS System that save the power loss 250 MW which is about 15% of total loss.…”

Section: Power Loss In Ups System Owing To (Ac-dc-ac) Transformation mentioning

confidence: 99%

“…There are different techniques and solutions to reduce harmonics in order to get desired output. Few of them are Capacitors, Compensators, EMI Filters, Passive filters, Dynamic Voltage Restorer (DVR), Active Power filters, and Unified Power Quality Conditioner (UPQC), Unified Frequency Quality Conditioner (UFQC) and Hybrid Active Power Filters (HAPF) [9][10][11][12][13][14][15][16]. The comparison of various harmonic alleviation techniques has been studied out by different researchers [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] and concluded that the HAPF is effective and more fast and modern filtering method.…”

Section: Mitigation Techniques Of Total Harmonic Distortion In Ups Symentioning

confidence: 99%

“…The current filtering approach suggests Hybrid Active Power Filter is hysteresis based for UPS System to mitigate harmonics currents, voltage distortion and optimal power transfer. The objective of this research is to address harmonic of UPS System and AC main supply form power system to explore the potential to increase reliability, minimize losses, optimal power transfer [9][10][11][12][13][14][15]. Passive and EMI Filters could not eliminate harmonics effectively from UPS system [16][17][18][19][20][21][22] therefore it requires modern, rapid filtering method as well combination of Active and Passive Filters [23][24][25][26][27] such as proposed model of HAPF for UPS System could mitigate current harmonics [28][29][30][31][32][33][34] for optimal power transfer, minimizing losses, increase overall efficiency, reliability and life span of equipment [13][14][15][16][17][18][19][20].…”

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Design and Implementation of Hybrid Active Power Filter (Hapf) for UPS System

Kumar

Memon

Uqaili

2020

IJIE

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Nowadays every sector from industries, commercial to residential uses the Uninterruptable Power Supplies (UPS) System and power electronics devices due to their essential need of power and application however these are beneficial and vital for each sector but they produce harmonics in the power system. These harmonics generate electrical disturbance and distort waveforms which results in power loss due to poor power quality. That is why to enhance the standard of power provision this harmonic disturbance should be lowered with implementation of Passive, EMI and other Active Power Filters (APF) [1]. Energy security and reliability are present-day problems and unnecessary load shedding is a great issue in Pakistan as well as in other backward countries due to rising energy consumption demand and reduced provision. Reserve supply through UPS is a temporary remedy for customers in such circumstances. When national grid power is not available and primary source fails to recharge the batteries, UPS will supply power automatically and maintains a continuous Power without delay or transients [2]. During the power conversion in rectifier and inverters (AC-DC-AC Converters) harmonics currents and voltage distortion caused in Uninterrupted Power Supply UPS requires up to date and rapid filtering method to remove and mitigate harmonics in order to have desired power transfer, raise overall efficiency, reduce losses, enhance accuracy and lifecycle of apparatus. UPS offers instant protection which also makes power losses significantly due to harmonic current [3-6]. It is the need of the time Abstract: Hybrid Active Power Filter (HAPF) is designed and applied for Uninterrupted Power Supply (UPS) System to mitigate harmonic currents in UPS during the power conversion from rectifiers to inverters (AC-DC-AC Converters). Various UPS types and topologies are used for continuous power supply without delay and protection to connected loads. In spite of the fact that UPS is one of the power quality apparatus but it has also drawback of disturbing the power system quality of system by current harmonics and voltage distortion during conversion of power. Passive and EMI Filters could not eliminate harmonics effectively from UPS system therefore it requires modern, rapid filtering method as well combination of Active and Passive Filters. Proposed model of HAPF for UPS System could mitigate current harmonics for optimal power transfer and minimize losses, increase overall efficiency, reliability and life span of equipment. Higher harmonic current and higher voltage distortion leads to greater power loss. In this paper the (d-q) theorem is applied for the identification of harmonic currents. The d-q theorem and calculation creates the signal of reference compensation current and this produced signal of current is tracked by the yield current of the voltage source converter.. Hysteresis based controller for HAPF is applied to create the switching signals to regulate and maintain the voltage source converter output currents. Harmonics and effi...

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