DC Microgrid System Modeling and Simulation Based on a Specific Algorithm for Grid-Connected and Islanded Modes with Real-Time Demand-Side Management Optimization

Bai, Wenshuai; Sechilariu, Manuela; Locment, Fabrice

doi:10.3390/app10072544

Cited by 18 publications

(21 citation statements)

References 20 publications

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“…The power flow of the DC microgrid under ICDA is shown in Figure 11. PV source can switch freely between PV-constrained production control and PV -maximum power point tracking control [34]. The power < 0 means that EVs show a total tendency to discharge, > 0 means that Figure 9 shows the storage soc and distribution coefficient k under ICDA.…”

Section: Simulation Results Under Icdamentioning

confidence: 99%

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PV-Powered Charging Station for Electric Vehicles: Power Management with Integrated V2G

2020

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The increase in the number of electric vehicles (EVs) has led to an increase in power demand from the public grid; hence, a photovoltaic based charging station for an electric vehicle (EV) can participate to solve some peak power problems. On the other hand, vehicle-to-grid technology is designed and applied to provide ancillary services to the grid during the peak periods, considering the duality of EV battery “load-source”. In this paper, a dynamic searching peak and valley algorithm, based on energy management, is proposed for an EV charging station to mitigate the impact on the public grid, while reducing the energy cost of the public grid. The proposed searching peak and valley algorithm can determine the optimal charging/discharging start time of EV in consideration of the initial state of charge, charging modes, arrival time, departure time, and the peak periods. Simulation results demonstrate the proposed searching peak and valley algorithm’s effectiveness, which can guarantee the balance of the public grid, whilst meanwhile satisfying the charging demand of EV users, and most importantly, reduce the public grid energy cost.

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Section: Simulation Results Under Icdamentioning

confidence: 99%

“…The power < 0 means that EVs show a total tendency to discharge, > 0 means that The power flow of the DC microgrid under ICDA is shown in Figure 11. PV source can switch freely between PV-constrained production control and PV -maximum power point tracking control [34].…”

Section: Simulation Results Under Icdamentioning

confidence: 99%

PV-Powered Charging Station for Electric Vehicles: Power Management with Integrated V2G

2020

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“…This makes it possible for the designer to compute for resonant filter coefficients when only the desired filter frequency response is defined in the s-domain. Then, Equations (16) to (22) provide digital implementation coefficients.…”

Section: Controller Of Proportional Resonantmentioning

confidence: 99%

“…How the variable load demand affects the system has not been analysed. One more hybrid DC/AC microgrid structure comprising photovoltaic and fuel cells were recommended in [16]. A synchronised function of unit power control and feeder flow control was formulated for improving system stability and decreasing the quantity of operating mode variations.…”

Section: Introductionmentioning

confidence: 99%

A Novel Cooperative Controller for Inverters of Smart Hybrid AC/DC Microgrids

et al. 2020

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This paper presents a novel cooperative control technique concerning fully-distributed AC/DC microgrids. Distributed generation based on inverters has two types, i.e., Current Source Inverter (CSI), also referred to as PQ inverter, and Voltage Source Inverter (VSI). Both inverter forms have a two-layer coordination mechanism. This paper proposes a design method for the digital Proportional-Resonant (PR) controller that regulates the current inside an inverter. The inverters will improve the voltage quality of the microgrid while maintaining the average voltage of buses at the same desired level. There is comprehensive detail on the computations specific to resonant and proportional gains and digital resonance path coefficients. The paper includes a digital PR controller design and its analysis in the frequency domain. The analysis is based on the w-domain. The main contribution of this paper is the proposed method, which not only focuses on the transient response but also improves the steady-state response which smoothens the voltage; furthermore, all inverters are effectively involved to increase the capacity of the microgrid for better power management. The suggested cooperative control technique is used on an IEEE 14-bus system having fully distributed communication. The convincing outcomes indicate that the suggested control technique is an effectual means of regulating the microgrid’s voltage to obtain an evener and steady voltage profile. The microgrid comprises distributed resources and is used as the primary element to analyse power flow and quality indicators associated with a smart grid. Lastly, numerical simulation observations are utilised for substantiating the recommended algorithm.

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“…The MG is supervised by an energy management strategy which controls each physical element by an independent controller. This strategy aims to ensure the power balance between power production and power consumption [30]. Therefore, the SSWT must be driven to provide the maximum power and ensure more benefits.…”

Section: Mg Overviewmentioning

confidence: 99%

Limited Power Point Tracking for a Small-Scale Wind Turbine Intended to Be Integrated in a DC Microgrid

Aourir

Locment

2020

Applied Sciences

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Limited power point tracking (LPPT) is emerging as a new technology for power management controllers for small-scale wind turbines (SSWTs) thanks to its advantages in terms of operation flexibility, economy and system security. LPPT operates in such a way that power requested by the user can be extracted from the wind turbine while respecting constraints. However, operating in LPPT mode still requires a deep understanding to obtain a compromise between minimizing power oscillations and transient response. For that, three LPPT power control strategies for an SSWT intended to be integrated in a direct current (DC) urban microgrid are investigated. These methods concern perturb and observe (P&O) with fixed step size, P&O based on Newton’s method and P&O based on the fuzzy logic (FL) technique. The experimental results highlight that all methods function correctly and reach the limited power point (LPP). The FL method improves dynamic performances with more steady oscillations around LPP compared to fixed step size and Newton’s methods. The sudden variation of wind velocity and power lead us to conclude that the FL method ensures a good balance between reducing oscillation of wind turbine (WT) output power around the operating point and convergence of rising time toward LPP.

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DC Microgrid System Modeling and Simulation Based on a Specific Algorithm for Grid-Connected and Islanded Modes with Real-Time Demand-Side Management Optimization

Cited by 18 publications

References 20 publications

PV-Powered Charging Station for Electric Vehicles: Power Management with Integrated V2G

PV-Powered Charging Station for Electric Vehicles: Power Management with Integrated V2G

A Novel Cooperative Controller for Inverters of Smart Hybrid AC/DC Microgrids

Limited Power Point Tracking for a Small-Scale Wind Turbine Intended to Be Integrated in a DC Microgrid

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