Developing A Smart Power-Voltage Relay   with no Communication System for DC Microgrids

Nahas, Eatmad W.; Mansour, Diaa‐Eldin A.; el‐Ghany, Hossam A. Abd; Eissa, M.M.

doi:10.1016/j.epsr.2020.106432

Cited by 26 publications

(7 citation statements)

References 36 publications

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“…Relay protection devices realize electrical protection based on power-frequency electrical quantity in the power network, guaranteeing the entire system’s stable operation [ 28 ]. Nevertheless, based on the power-frequency electrical quantity, some protection problems persist in the application, including trouble providing complete guarantee measurement accuracy, small fault current and inadequate characteristics in selecting the line connection, and unsmooth system operation with unstable currents.…”

Section: Methodsmentioning

confidence: 99%

A security technology of power relay using edge computing

2021

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The purposes are to find the techniques suitable for the safety relay protection of intelligent substations and discuss the applicability of edge computing in relay protection. Regarding relay protection in intelligent substations, edge computing and optimized simulated annealing algorithm (OSAA) are combined innovatively to form an edge computing strategy. On this basis, an edge computing model is proposed based on relay fault traveling waves. Under different computing shunt tasks, OSAA can converge after about 1,100 iterations, and its computing time is relatively short. As the global optimal time delay reaches 0.5295, the corresponding computing time is 456.27s, apparently better than the linear search method. The proposed model can reduce the computing time significantly, playing an active role in the safe shunting of power relays. The simulation also finds that the voltage and current waveforms corresponding to the fault state of Phase A are consistent with the actual situations. To sum up, this model provides a reference for improving and optimizing intelligent substation relay protection.

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Section: Methodsmentioning

confidence: 99%

A security technology of power relay using edge computing

2021

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“…In this work, the microgrid is located on the DC link instead of the conventional capacitor. The microgrid, as depicted in Figure 2 [20], encompasses a PV system, a wind turbine system, two batteries, and loads. The 3phase transformer is installed to connect between the two various voltage levels of the AC grid and the inverter's AC side.…”

Section: Introductionmentioning

confidence: 99%

Voltage Control of a Three-Phase Distribution Grid using a DC Microgrid-Fed STATCOM

Khater,

Elkady,

Amr

et al. 2024

Eng. Technol. Appl. Sci. Res.

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With the increasing penetration of microgrids in distribution systems, the possibility for voltage variations increases. This paper proposes the use of a static synchronous compensator (STATCOM) fed by a DC microgrid to control the voltage of a 3-phase AC distribution grid and provide bidirectional active power transfer from the AC grid to the DC microgrid and vice versa. A simplified control is applied to this system to manage the magnitude and angle of the system voltage at the point of common coupling. With the use of a PI controller and pulse width modulation, the proposed control was able to modify the active and reactive power compensation. The control approach is characterized by its simplicity and rapid response to system changes, such as fault occurrences or load variations. The proposed control system is applied after converting the 3-phase system into a dq system to simplify the voltage regulation process. The PSCAD package is used to perform the simulation. Results demonstrate that it is possible to control STATCOM to offset reactive power and regulate grid voltage. The results validated the ability of active power transfer through the line by injecting negative and positive active power. The transfer of active and reactive power from the AC grid to the DC microgrid, and vice versa, is examined in this study following the STATCOM rating and the energy management demands.

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“…In this regard, proper coordination between the added devices, electrical grids, and renewable energy sources is needed. The second philosophy is applying advanced and adaptive techniques for control, protection and energy management [14][15][16][17]. In addition, there are significant efforts toward promoting renewable energy generation with incentivized feed-in tariff programs.…”

Section: Introductionmentioning

confidence: 99%

Applications of IoT and digital twin in electrical power systems: A comprehensive survey

Mansour

Numair

Zalhaf

et al. 2023

IET Generation Trans & Dist

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This paper reviews the applications of Internet of Things (IoT) and digital twin technology in electrical power systems. It begins by discussing the generalized IoT value chain, followed by the terminology of smart grid, with clarifying the role of IoT‐systems and the digital twin structure within the Smart Grid. A comparison between different short‐range and long‐range transports is presented. The paper then discusses the use of IoT and digital twin technology for effective energy management with applications in smart homes, smart buildings, smart grids, smart industries (Industry 4.0), smart transportation and smart cities. Additionally, the paper explores the use of IoT and digital twin technology for condition monitoring and diagnosis (CMD) in electrical power systems. Three different cases are presented for CMD, that is, CMD of power transformers, CMD of electrical grids and CMD of substations. IoT and digital twin applications are also highlighted in power electronic systems. Finally, the paper discusses the challenges and opportunities of applying IoT and digital twin technology to electrical power systems and provides recommendations for future research.

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Developing A Smart Power-Voltage Relay with no Communication System for DC Microgrids

Cited by 26 publications

References 36 publications

A security technology of power relay using edge computing

A security technology of power relay using edge computing

Voltage Control of a Three-Phase Distribution Grid using a DC Microgrid-Fed STATCOM

Applications of IoT and digital twin in electrical power systems: A comprehensive survey

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