Cooperative Energy Management of Hybrid DC Renewable Grid Using Decentralized Control Strategies

Beykverdi, Mehrdad; Jalilvand, Abolfazl; Ehsan, Mehdi

doi:10.3390/en9110859

Cited by 8 publications

(5 citation statements)

References 34 publications

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“…The combination of the photovoltaic module changes the output characteristics of the voltage and current of the DC power, and it determines the topology of the photovoltaic power converter. In this paper, it is assumed that the photovoltaic system operates by the MPPT through Equations (16) to (17) [17].…”

Section: Photovoltaic Power Generation Modelingmentioning

confidence: 99%

Optimal Operation Strategy of ESS for EV Charging Infrastructure for Voltage Stabilization in a Secondary Feeder of a Distribution System

Kim

Ryu

et al. 2020

Energies

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The introduction of electrical vehicle charging infrastructure including electric vehicle (EV) charger renewable energy resource at the secondary feeder in a distribution system has been increased as one of countermeasure for global environmental issues. However, the electric vehicle charging (EVC) infrastructure may act as the peak load in the distribution system, which can adversely impact on the voltage stability when the electric vehicle is quickly charged. Therefore, to keep within the limit capacity of a secondary feeder and allowable limit for the feeder voltage, this paper proposes a stabilization method by an energy storage system (ESS) control strategy at the secondary feeder to not exceed the upper limit or fall below the lower limit. In addition, this paper presents an estimation method to keep the proper standard value of the state of charge (SOC). From the simulation results, the voltage stabilization operation by the ESS should make the feeder voltages of the distribution system (secondary feeder) introduced EVC infrastructure keep better voltage conditions. In addition, the estimation method was able to keep the proper standard value confirming that the SOC of the ESS when it is in standby can be kept within the proper reference range. Therefore, it is confirmed that this strategy is an effective tool to solve the voltage problems by ESS.

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Section: Photovoltaic Power Generation Modelingmentioning

confidence: 99%

Optimal Operation Strategy of ESS for EV Charging Infrastructure for Voltage Stabilization in a Secondary Feeder of a Distribution System

Kim

Ryu

et al. 2020

Energies

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“…R is the turbine radius in (m), V w is the wind speed in (m/s), and ω is the turbine angular speed in (rad/s). Figure 4 shows power characteristics of a typical wind turbine with β = zero and variable speed operation [30][31][32][33]. Figure 5 shows the variation of C p versus λ with different values of β as described by (2).…”

Section: Wind Turbine Characteristicsmentioning

confidence: 99%

Modelling, Design and Control of a Standalone Hybrid PV-Wind Micro-Grid System

Al-Quraan

Al-Qaisi

2021

Energies

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The problem of electrical power delivery is a common problem, especially in remote areas where electrical networks are difficult to reach. One of the ways that is used to overcome this problem is the use of networks separated from the electrical system through which it is possible to supply electrical energy to remote areas. These networks are called standalone microgrid systems. In this paper, a standalone micro-grid system consisting of a Photovoltaic (PV) and Wind Energy Conversion System (WECS) based Permanent Magnet Synchronous Generator (PMSG) is being designed and controlled. Fuzzy logic-based Maximum Power Point Tracking (MPPT) is being applied to a boost converter to control and extract the maximum power available for the PV system. The control system is designed to deliver the required energy to a specific load, in all scenarios. The excess energy generated by the PV panel is used to charge the batteries when the energy generated by the PV panel exceeds the energy required by the load. When the electricity generated by the PV panels is insufficient to meet the load’s demands, the extra power is extracted from the charged batteries. In addition, the controller protects the battery banks in all conditions, including normal, overcharging, and overdischarging conditions. The controller should handle each case correctly. Under normal operation conditions (20% < State of Charge (SOC) < 80%), the controller functions as expected, regardless of the battery’s state of charge. When the SOC reaches 80%, a specific command is delivered, which shuts off the PV panel and the wind turbine. The PV panel and wind turbine cannot be connected until the SOC falls below a safe margin value of 75% in this controller. When the SOC goes below 20%, other commands are sent out to turn off the inverter and disconnect the loads. The electricity to the inverter is turned off until the batteries are charged again to a suitable value.

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“…Therefore, off-grid systems always have a combination of AC and DC generation and conversion to AC at the point of common coupling (PCC) for feeding AC loads [20,21]. Further, the reported research on power control and management is presented in [22][23][24][25][26][27], an application of NERs combinations in [28], the controller design, and the stability analysis strengthening off-grid configurations are detailed in [29][30][31][32]. The effective control is required to operate various power converters and generators at maximum efficiency to extract the utmost power from NERs, as and when available.…”

Section: Introductionmentioning

confidence: 99%

Off-Grid System Configurations for Coordinated Control of Renewable Energy Sources

et al. 2020

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Configurations, coordinated controller design and applications of various off-grid systems with distributed energy resources (DERs) for an uninterrupted supply, are presented in this paper. The performances for the optimal operation of a diesel generator (DG) in the presence of nonlinear loads, fuel-savings, voltage and frequency regulation, a soft and secure transition among different operating modes, an optimization, and power management control, are validated through simulated results and test results on the prototype to demonstrate the suitability of these configurations with natural energy resources (NERs) for continuous development in remote as well as in isolated locations.

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Cooperative Energy Management of Hybrid DC Renewable Grid Using Decentralized Control Strategies

Cited by 8 publications

References 34 publications

Optimal Operation Strategy of ESS for EV Charging Infrastructure for Voltage Stabilization in a Secondary Feeder of a Distribution System

Optimal Operation Strategy of ESS for EV Charging Infrastructure for Voltage Stabilization in a Secondary Feeder of a Distribution System

Modelling, Design and Control of a Standalone Hybrid PV-Wind Micro-Grid System

Off-Grid System Configurations for Coordinated Control of Renewable Energy Sources

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