Review of the current challenges and methods to mitigate power quality issues in single‐phase microgrids

Micallef, A.

doi:10.1049/iet-gtd.2018.6020

Cited by 28 publications

(19 citation statements)

References 87 publications

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“…( 2) Communication delays under the uncertainties parameters increase system sensitivity. In microgrids, the virtual impedance method was used to eliminate the dependence of active and reactive powers between power supplies that were connected directly to the PCC in microgrids through resistance lines [85,86]. Virtual impedance has been proposed to stabilize the line impedance of distributed generation sources to improve the power sharing performance by droop control method [87], which can be placed in the inverter output without a physical connection.…”

Section: Control Strategies For Power Sharingmentioning

confidence: 99%

A Literature Review of the Control Challenges of Distributed Energy Resources Based on Microgrids (MGs): Past, Present and Future

Razmi

2022

Energies

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Different types of distributed generation (DG) units based on renewable and non-renewable energy sources can create a local energy system in microgrids. The widespread penetration of distributed energy resources (DERs) has affected many power system issues, such as the control and operation of these networks. For the optimal operation of microgrids, optimal energy planning and management in the new space governing the distribution system requires extensive research and analysis. Getting acquainted with the latest research about the evaluation of the problems and challenges in the design of control systems plays an important role in providing a guidance map for researchers to find the recent challenges and propose new solutions. This paper tried to list the challenges of distributed generation sources for MG applications, opportunities, and solutions. These challenges are reported in hierarchical control strategies and power-sharing categories. Therefore, Model Predictive Control (MPC)-based approaches are reviewed for different recent control levels and power sharing strategies in a comprehensive and simple point of view. The performance comparison of MPC methods together and different allocated fitness functions and implementation algorithms are dedicated. Another hand, the potential of MPC methods to control inverters for increasing the reliability of the grid, which this feature could not be achieved by using conventional strategies, while has not been investigated by researchers widely, is introduced in a short review. Therefore, this paper shows an intersection guidance map for readers to facilitate future research works in these exciting and undiscovered fields.

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Section: Control Strategies For Power Sharingmentioning

confidence: 99%

A Literature Review of the Control Challenges of Distributed Energy Resources Based on Microgrids (MGs): Past, Present and Future

Razmi

2022

Energies

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“…This method is simple and efficient, does not depend on the performance of the computer, and does not change the program algorithm of the software. Micallef integrated distributed generation in the form of renewable energy into a single-phase low-voltage microgrid to produce energy closer to consumers [9]. The formation of a low-voltage microgrid can achieve high energy efficiency and improve the reliability of power supply.…”

Section: Introductionmentioning

confidence: 99%

Deep Learning Optimization of Microgrid Economic Dispatch and Wireless Power Transmission Using Blockchain

Chen

Guo

Zhao

et al. 2022

Wireless Communications and Mobile Computing

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The purpose is to realize the decentralized microgrid economic dispatch, improve the information transparency and security of microgrid systems, and make the power grid move towards a clean, safe, efficient, and reliable development path. Deep learning optimization of microgrid economic dispatch and wireless power transmission based on blockchain technology are studied. First, the related theories and methods of microgrid systems, wireless power transmission, and deep learning optimization based on blockchain technology are introduced. Next, the microgrid economic dispatch is simulated and analyzed on a large scale. Finally, the comparison results between microgrid economic dispatch and common radio energy transmission technologies are analyzed. The results show that daily planning can better coordinate the state of distributed generation, energy storage system, and public connection. The operation results of the previous day correspond to the long-term operation economy of the microgrid. The total operation cost of the microgrid is 4668 yuan/day, and the remaining power is maintained between 500 and 600 kW, which helps to prevent excessive battery discharge, prolong battery life, and reduce operation cost. The simulation results show that the total power imbalance of the microgrid can reduce the output fluctuation of controllable load shedding of distributed generation. When the load characteristics are not important, the output fluctuation of controllable distributed generation can be reduced. The proposed economic dispatch model can optimize the data security, information storage, and information release of the microgrid and has a certain guiding role for the development of the national power grid and power industry.

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“…Several PQ problems such as voltage sag and unbalance, current distortion and unbalance, and low power factor exist in power systems. Voltage sag and unbalance are generally caused by faults in the power system [1, 2], whilst current distortion and unbalance are caused by the proliferation of non‐linear loads such as electric vehicles (EVs) and other power electronic loads in the power system [3, 4]. Low power factor is caused by the use of a large number of inductive loads [5].…”

Section: Introductionmentioning

confidence: 99%

Non‐local harmonic current and reactive power compensation for a multi‐microgrid system using a series–shunt network device

John

Patsios

Greenwood

2020

IET Generation, Transmission & Distribution

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In this paper, a new non-local active compensation method is developed for a multi-microgrid (MMG) system. The current industry practice is to utilize local harmonic current and reactive power compensation methods, however local compensation methods are not practical for large MMG system with widely dispersed non-linear loads, because each nonlinear load would require its own compensator. To overcome this problem, a novel compensating technology called a seriesshunt network device (SSND) is installed between a pair of microgrids in the proposed MMG system. The SSND reduces the number of local compensators required while also performing additional functions in comparison with conventional devices. For effective control of the SSND, an improved model predictive control (MPC) algorithm, which gives better tracking accuracy and faster set-point change than that of a conventional proportional-integral (PI) controller, is also presented. Analysis and simulations verify the capability of SSND in performing both local and non-local active compensation of harmonic current and reactive power in the proposed MMG system under various test scenarios. Simulation results show that the MPCcontrolled SSND can achieve effective compensation, thereby resulting in a very low current total harmonic distortion (THD) value of 2.4% and a unity power factor at the distribution grid side.

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Review of the current challenges and methods to mitigate power quality issues in single‐phase microgrids

Cited by 28 publications

References 87 publications

A Literature Review of the Control Challenges of Distributed Energy Resources Based on Microgrids (MGs): Past, Present and Future

A Literature Review of the Control Challenges of Distributed Energy Resources Based on Microgrids (MGs): Past, Present and Future

Deep Learning Optimization of Microgrid Economic Dispatch and Wireless Power Transmission Using Blockchain

Non‐local harmonic current and reactive power compensation for a multi‐microgrid system using a series–shunt network device

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