Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

Hossain, Alamgir; Pota, Hemanshu R.; Hossain, Jahangir; Blaabjerg, Frede

doi:10.20944/preprints201810.0278.v2

Cited by 5 publications

(4 citation statements)

References 107 publications

(123 reference statements)

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“…• The Chinese Academy of Sciences built a 200 kVA microgrid test system and analyzed the system for steady state and dynamic state (Zhou et al, 2015). The concept of DC microgrids, integrated with renewable energy sources, has gained significant importance due to advancements in modern power electronics and an increasing awareness of environmentally friendly power generation, specifically in the form of DC (e.g., solar, fuel cell, super capacitor, and battery storage) (Hossain et al, 2019). These microgrids exhibit enhanced efficiency by directly powering DC loads, eliminating the need for multiple conversion stages and distinguishing them from traditional AC microgrids.…”

Section: Development Of Microgridsmentioning

confidence: 99%

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Comparative analysis and implementation of DC microgrid systems versus AC microgrid performance

Memon,

Ali,

Memon

et al. 2024

Front. Energy Res.

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DC power systems have emerged as a cost-effective solution for electric power generation and transmission, challenging the dominance of AC distribution systems. However, a comprehensive efficiency comparison between DC and AC microgrids remains understudied. This study seeks to explore and conduct a thorough survey on development and designing of DC microgrids to address this gap. Firstly, a comprehensive literature review comparing the efficiencies of AC and DC microgrids has been presented. The analysis highlights the superior efficiency of DC distribution systems over AC systems, supported by detailed advantages. Secondly, hardware implementation has been performed to directly compare the efficiency of DC versus AC systems. Research validity and application are further improved by the hardware prototype’s scalability, which in simulation allows for a thorough assessment of system stability over a range of scenarios from four to six terminals. Test results from the built hardware prototype demonstrate an astounding 15% increase in efficiency using the DC system compared to the AC system, demonstrating its potential for improved performance in real-world scenarios. In simulation results, the designed DC microgrid demonstrates stable voltages of 500V under steady state operation and rapid recovery within 80 ms under both symmetrical and asymmetrical faults has been observed. The research being investigated utilizes hardware implementation and simulation to provide useful insights into the efficiency and stability of DC microgrids in comparison to AC systems. These results are important for developing robust power distribution networks in modern energy environments, promoting sustainability and dependability in infrastructure growth.

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Section: Development Of Microgridsmentioning

confidence: 99%

“…Using DC microgrids has proven to be a successful solution for bringing electricity to rural areas. The use of DC microgrids, combined with renewable energy sources, is growing globally (Hossain et al, 2019). An important feature of microgrids is their ability to operate independently when the regular power grid is not available.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis and implementation of DC microgrid systems versus AC microgrid performance

Memon,

Ali,

Memon

et al. 2024

Front. Energy Res.

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“…In this paper, the fitness function used is the integral time absolute error (ITAE), as presented in Eq. 11 for interconnected multi area microgrid unit (Hossain et al, 2019). Despite load disturbances, the goal is to achieve practically zero deviation in frequency and tie-line power flow fluctuations.…”

Section: Battery Energy Storage System Modelmentioning

confidence: 99%

Enhanced harris hawks optimization based load frequency control of multi area microgrid based water treatment plant with consideration of 3DOF-(FO-PIDN)/(TIDN) controller

Rohmingtluanga,

Datta,

Sinha

et al. 2024

Front. Energy Res.

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Municipal water supply system (WSS) consist of different pumping stages viz. intake, water treatment plant (WTP) and intermediate pumping station (IPS). Usually, the power supply for WSS is obtained through public power tapping sources. However, this often leads to load shedding and disruption of the water supply. This paper focuses on the concept, considering WSS as a multi-source multi-area microgrid scheme, this includes renewable energy sources (RES) such as solar, wind, etc. Moreover, the study incorporates a Battery Energy Storage System (BESS) and a Diesel Engine Generator (DEG) to provide power supply during peak demand at each pumping station. Frequency control is essential for optimizing system performance. This paper proposes Enhanced Harris Hawks Optimization Algorithm (EHHO) based PID controller for regulating the frequency in the multi-microgrid-based water supply system. The proposed controller is implemented in MATLAB simulation software, and its response is compared with other optimization methods such as Particle Swarm Optimization (PSO) and Grey Wolf Optimization (GWO). Moreover, implementation and comparison of higher degree order controller such as 3DOF-FOPIDN controller and 3DOF-TIDN controllers are tested under PSO method to observe the performance as well as robustness of the controller. The results indicate that the proposed controller provides better performance in controlling the load frequency deviation, thus improving the efficiency and reliability of the multi-microgrid system for consideration of municipal water supply.

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“…Hence, islanding detection in a microgrid is inevitable to meet its functions. However, the existing laws need to be amended to create microgrids working in islanded state 6 . The tripping time of a target DG for islanding event is 0.5 s 2 while the guidelines, IEEE 1547-2003 and IEEE 1547a-2014, 3,4 suggest that DG should be disconnected within 2 seconds at the onset of an islanding event.…”

Section: Introductionmentioning

confidence: 99%

A combined islanding detection algorithm for grid connected multiple microgrids for enhanced microgrid utilisation

Radhakrishnan

Ashok

Sunitha

2019

Int Trans Electr Energ Syst

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SUMMARY There is an abundant interest in microgrids due to its innate ability to operate in either utility connected or isolated mode. The existing conventional methods disconnect the individual distributed generators on loss of utility. In this work, a combined islanding detection algorithm at the point of common coupling (PCC) of the whole microgrid is proposed. It detects islanding using islanding detection monitoring factor, rate of change of inverse hyperbolic cosecant function, and voltage at the PCC as the islanding detection elements with the help of phasor measurement units. On detection of islanding event, the whole microgrid is transferred to autonomous mode. Moreover, any fault in the microgrid side which may isolate the distributed generator is detected using dilation and erosion mathematical morphological operators. The algorithm estimates the probability of power balance and probability of islanding duration at the control centre for events within the microgrid. The decision for islanded operation or disconnecting the distributed generator is communicated based on this. The proposed method is tested on a microgrid test system and verified on a section of the realistic local feeder of the Indian utility system. The simulation results indicate that the developed algorithm is quick, reliable, and secure in discriminating between the islanding and nonislanding scenarios for the various cases during both import and export conditions with an accuracy of 100%. It eliminates the nondetection zone completely even during zero power mismatch conditions. With the proposed method, any unnecessary distributed generator outage can be avoided enhancing the microgrid utilisation.

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Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

Cited by 5 publications

References 107 publications

Comparative analysis and implementation of DC microgrid systems versus AC microgrid performance

Comparative analysis and implementation of DC microgrid systems versus AC microgrid performance

Enhanced harris hawks optimization based load frequency control of multi area microgrid based water treatment plant with consideration of 3DOF-(FO-PIDN)/(TIDN) controller

A combined islanding detection algorithm for grid connected multiple microgrids for enhanced microgrid utilisation

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