Seeker optimization approach to dynamic PI based virtual impedance drooping for economic load sharing between PV and SOFC in an islanded microgrid

Choudhury, Subhashree; Bhowmik, Pritam; Rout, Pravat Kumar

doi:10.1016/j.scs.2017.11.013

Cited by 33 publications

(14 citation statements)

References 23 publications

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“…A virtual impedance drooping is generally used where the active and reactive power is closely coupled. 22,26,38,41,[58][59][60][61] It signifies that the feeder impedance is neither highly resistive nor highly reactive in nature. This type of feeder is found in medium voltage AC transmission system where the line resistance is almost equal to the line reactance making the X/R ratio almost equal to the unity.…”

Section: Virtual Impedance Drooping (Vid) Schemementioning

confidence: 99%

A comprehensive review on issues, investigations, control and protection trends, technical challenges and future directions for Microgrid technology

Choudhury

2020

Int Trans Electr Energ Syst

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Summary Recent researches in electrical grids and networks fraternity are directed toward the integration of Microgrid (MG) technologies across the consumer's end. Nowadays, conventional power grid networks are obsolete due to its difficulty of control and protection when many numbers of distributed generations are used. MGs thus acts as a viable solution replacing the conventional grid as it provides integrating platform for Microsources, loads, Electrical Energy Storage Devices and Power Electronic Devices at the demand end within a small locality. MGs are capable of operating either in grid connected or autonomous mode of operation during a faulted situation. However, the system's stability, reliability, and operational control is of extreme concern basically during the islanded mode of operation. Regardless of that, very notable real time implementation and commercial use of MGs are yet to be deployed. This research article brings out a comprehensive review of various challenges and issues related to installation of MG, different controllers for power flow control, idea about the protection system, role of MGs in realizing smart grids (SGs), its major shortcomings, and future prospects.

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Section: Virtual Impedance Drooping (Vid) Schemementioning

confidence: 99%

A comprehensive review on issues, investigations, control and protection trends, technical challenges and future directions for Microgrid technology

Choudhury

2020

Int Trans Electr Energ Syst

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“…Finally, the complete expression of the derived state-space model can be expressed in the matrix form as (see (13)) .…”

Section: Designing Of the Test Environmentmentioning

confidence: 99%

“…In this particular section, the robustness of the proposed control mechanism and the system stability have been critically analysed. Substituting the respective parametric values from Table1 in the established state-space model given in (13) From the obtained eigenvalues, system response delay in terms of samples can be computed. In this case, taking the sampling time of 25 μs, response delay has been illustrated in Fig.…”

Section: Robustness and Critical Stability Assessmentmentioning

confidence: 99%

Establishment of an auxiliary virtual damping loop for the superior inertial response in the microgrid

Bhowmik¹,

Rout²

2020

IET Smart Grid

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Low inertial microgrids in the power network are extremely sensitive toward any uncertainties. Therefore, the practise of complementing inertia virtually in microgrids has earned huge attention in recent time. However, the effect of inertia emulation virtually on the overall damping characteristics of the network has not been explored yet. Concerning to the fact, the study has put an effort to establish a decisive relationship between the inertial and damping powers. Furthermore, a trajectory analysis has been performed to acutely measure the individual effects of the virtual inertia and the virtual damping on the power network. On the basis of the observation from the trajectory analysis, the study has introduced the concept of the dynamic computation of virtual inertial constant by realising the novel self-tuned proportional-integral-based control mechanism. The study further has proposed the superimposed auxiliary dynamic virtual damping loop to suppress the frequency deflection time. To evaluate and justify the improvement of the system performance, the proposed integrated inertia-damping emulation system has been relatively compared with the conventional virtual inertia emulation scheme in a microgrid testbed.

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“…Conventional droop control used for power sharing among DER may cause undesirable voltage and frequency deviations; the study in Choudhury et al presents multiple drooping strategies and their advantages. The power sharing between diverged DER becomes extremely critical particularly when the response time of the microsources differs significantly; in this regard, Choudhury et al presents a control technique for proportional load sharing in the islanded‐mode operation of the microgrid. A decentralized sliding mode control of islanded AC microgrids affected by unknown load dynamics and model uncertainties is presented in Cucuzzella et al Another solution for maintaining grid stability in islanded mode is to implement cooperative control and provide reference value to a certain number of DGs or active loads in a microgrid, so‐called pinning control .…”

Section: Overview Of Microgrid Operation Modesmentioning

confidence: 99%

“…[12][13][14][15][16][17][18][19][20][21][22][23][24]36 Islanded Consumers loads are supplied uninterrupted without electrical connection of microgrid and main grid. [21][22][23][24][25][26][27][28][29][30][31][32][33][34] Transition Process of islanding microgrid by upstream switches at the PCC during disturbances in main grid or resynchronization with the main grid once the disturbance is removed [36][37][38][39][40] FIGURE 2 Sample reconfiguration process flowchart 45…”

Section: Operation Mode Description Referencesmentioning

confidence: 99%

A review on real‐time simulation and analysis methods of microgrids

Ahmadiahangar

Rosin

Niaki

et al. 2019

Int Trans Electr Energ Syst

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Summary Microgrid is a recently developed concept for future power systems. The main characteristics of the microgrid are the capability of integration of renewable energy sources and the ability to operate in two grid‐connected and islanded modes. A significant challenge of microgrid implementation is developing comprehensive control methods to ensure efficient, stable, and reliable operation. Real‐time studies are a promising approach in this case. In this paper, various real‐time energy management approaches have been thoroughly explained following a new categorization of them. A significant literature review of real‐time simulation and modeling methods has also been presented. A review of different applications of hardware‐in‐the‐loop testing of the microgrid is included in the present study. Finally, a discussion on demand for further research has been made. The presented work is organized to allow a reader to understand the importance of real‐time studies of microgrids and highlight trends in literary works without delving deeply into each one.

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Seeker optimization approach to dynamic PI based virtual impedance drooping for economic load sharing between PV and SOFC in an islanded microgrid

Cited by 33 publications

References 23 publications

A comprehensive review on issues, investigations, control and protection trends, technical challenges and future directions for Microgrid technology

A comprehensive review on issues, investigations, control and protection trends, technical challenges and future directions for Microgrid technology

Establishment of an auxiliary virtual damping loop for the superior inertial response in the microgrid

A review on real‐time simulation and analysis methods of microgrids

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