Solar PV-BES in distribution system with novel technique for DC voltage regulation

Gira, Naveen; Dahiya, Anil Kumar

doi:10.1016/j.jestch.2020.01.004

Cited by 10 publications

(6 citation statements)

References 25 publications

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“…Finally, the ripples in both the magnetizing current (r i m ) and bus voltage (r v bus ) are calculated from (1), (2), and (10) as follows:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Moreover, batteries are also essential in different applications like electric vehicles, microgrids, uninterruptible power supplies, stand-alone renewable energy systems, auxiliary services for the grid, among others. In most of those applications, the batteries compensate for the unbalances between generation and load by regulating the voltage of a dc bus through a charging-discharging system, which charges the batteries when generation power is greater than the load and discharges the battery in the opposite condition [2]. Moreover, the charging-discharging system holds the energy in the battery (i.e., idle mode) when the power and load are balanced [3].…”

Section: Introductionmentioning

confidence: 99%

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Sliding-Mode Control of Bidirectional Flyback Converters with Bus Voltage Regulation for Battery Interface

2022

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Energy storage systems are essential for multiple applications like renewable energy systems, electric vehicles, microgrids, among others. Those systems are responsible of regulating the dc bus voltage using charging-discharging systems which are mainly formed by a power converter and a control system. This work focuses on the control system of a flyback converter. A detailed design procedure of an adaptive sliding-mode controller (SMC) and its parameters is presented. The proposed procedure was validated through simulations which allow to confirm its good performance in terms of global stability providing the desired dynamic of the dc bus voltage regulation.

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“…Finally, the ripples in both the magnetizing current (r i m ) and bus voltage (r v bus ) are calculated from (1), (2), and (10) as follows:…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sliding-Mode Control of Bidirectional Flyback Converters with Bus Voltage Regulation for Battery Interface

2022

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“…However, with the high penetration of solar PV generators into the grid, stability issues may arise on the grid side if there is a disconnection of the PV plant during the fault. Furthermore, if the disconnection is repeated, the component lifetime will be negatively impacted, and the reconnection of the PV plant to the utility grid will necessitate substantial start-up costs [1].…”

Section: Introductionmentioning

confidence: 99%

Low Voltage Ride through Enhancement Using Grey Wolf Optimizer to Reduce Overshoot Current in the Grid-Connected PV System

Jaalam

Ahmad

Khalid

et al. 2022

Mathematical Problems in Engineering

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In today’s world, the DG should not be disconnected in the event of a power outage but should instead remain linked to the grid and supported by reactive power. This can be accomplished by implementing the low voltage ride through (LVRT) with a proportional integral (PI) controller. As a result, the voltage profile can be enhanced. The PI controller, on the other hand, has drawbacks in that setting the gain takes a long time and results in an overshoot current on the grid, which could trigger the protection relay. To address this issue, this paper proposes employing a grey-wolf optimizer (GWO) to enhance the LVRT in a 5 MW three-phase grid-connected PV system. A MATLAB simulation was carried out then under a three-phase fault and load disturbance to verify the efficiency. It is found that, even with a 70% voltage sag, the PV system can remain connected to the electrical grid while minimising overshoot current on the grid side.

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“…The solar photovoltaic (PV) system is considered one of the most popular RESs, while hydrogen fuel cells (FCs) are gaining popularity. However, the output voltage generated by both PV units or FCs is lower than the desired voltage level for the integration with the main grid through voltage source inverters [1,2]. One solution for achieving the desired voltage level is to use multiple PV cells or FCs in series in which several cells might be shaded and become reverse biased, i.e., working as a load rather than a source.…”

Section: Introductionmentioning

confidence: 99%

A High Step-Up Switched Z-Source Converter (HS-SZC) with Minimal Components Count for Enhancing Voltage Gain

et al. 2021

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Some applications such as fuel cells or photovoltaic panels offer low output voltage, and it is essential to boost this voltage before connecting to the grid through an inverter. The Z-network converter can be used for the DC-DC conversion to enhance the output voltage of renewable energy sources. However, boosting capabilities of traditional Z-network boost converters are limited, and the utilization of higher parts count makes it bulky and expensive. In this paper, an efficient, high step-up, switched Z-source DC-DC boost converter (HS-SZC) is presented, which offers a higher boost factor at a smaller duty ratio and avoids the instability due to the saturation of inductors. In the proposed converter, the higher voltage gain is achieved by using one inductor and switch at the back end of the conventional Z-source DC-DC converter (ZSC). The idea is to utilize the output capacitor for filtering and charging and discharging loops. Moreover, the proposed converter offers a wider range of load capacity, thus minimizing the power losses and enhancing efficiency. This study simplifies the structure of conventional Z-source converters through the deployment of fewer components, and hence making it more cost-effective and highly efficient, compared to other DC-DC boost converters. Furthermore, a comparison based on the boosting capability and number of components is provided, and the performance of the proposed design is analyzed with non-ideal elements. Finally, simulation and experimental studies are carried out to evaluate and validate the performance of the proposed converter.

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Solar PV-BES in distribution system with novel technique for DC voltage regulation

Cited by 10 publications

References 25 publications

Sliding-Mode Control of Bidirectional Flyback Converters with Bus Voltage Regulation for Battery Interface

Sliding-Mode Control of Bidirectional Flyback Converters with Bus Voltage Regulation for Battery Interface

Low Voltage Ride through Enhancement Using Grey Wolf Optimizer to Reduce Overshoot Current in the Grid-Connected PV System

A High Step-Up Switched Z-Source Converter (HS-SZC) with Minimal Components Count for Enhancing Voltage Gain

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