Power quality improvement using ultra capacitor based dynamic voltage restorer with real twisting sliding mode control

Shah, M. S.; Mahmood, T.; Ullah, Mian Farhan

doi:10.20998/2074-272x.2022.1.08

Cited by 7 publications

(10 citation statements)

References 13 publications

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“…Ultra-capacitor inclusion in the DVR system is perfect due to the milliseconds to seconds range duration of instant sags/swells. In general, ultra-capacitors have a lower energy density are better suited for voltage sag/swell correction with high power density, as these processes need a large amount of power in a short amount of time [5]. Ultra-Capacitors, as compared to other energy storage components, have a huge charge/discharge cycle, even for modules of same size, resulting in simplicity of integration [92].…”

Section: Dvr In Distributed Grid With Ultra Capacitormentioning

confidence: 99%

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A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

Shah,

Ullah,

Nouman

et al. 2024

Eng. Res. Express

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The state-of-the-art dynamic voltage restorers (DVRs) have advanced significantly in recent years. Modern DVRs can detect voltage sags or dips on the power line in real-time and are able to rapidly inject a compensating voltage to maintain a constant voltage at the load. This helps to improve the power quality of the electrical distribution system and to protect sensitive electronic equipment from voltage fluctuations. One key development in the field of DVRs has been the use of advanced control algorithms that enable the DVR to track the voltage more accurately on the power line and to inject a compensating voltage more accurately. These algorithms can be implemented using digital signal processors (DSPs) or field-programmable gate arrays (FPGAs), which allow for fast and precise control of the DVR. Another important development has been the use of high-frequency inverters in DVRs. These inverters can operate at much higher frequencies than traditional inverters, which allows them to switch on and off more quickly and to inject a more precise compensating voltage. This can help to further improve the power quality of the electrical distribution system. Overall, the state-of-the-art DVR technology continues to evolve, and new advances are being made all the time to improve the performance and reliability of these devices.

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Section: Dvr In Distributed Grid With Ultra Capacitormentioning

confidence: 99%

“…The challenges faced by the Distribution system stem from factors such as faults, fluctuating load conditions, and the intricacies associated with interconnected or radial configurations. Furthermore, compared to power generation and transmission, the Distribution system typically operates at a lower voltage profile [5].…”

Section: Introductionmentioning

confidence: 99%

A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

Shah,

Ullah,

Nouman

et al. 2024

Eng. Res. Express

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“…Using tap changers, capacitor banks, uninterruptible power supply (UPS), and adding more parallel feeders to existing lines are a few of the traditional techniques for enhancing the voltage profile of a power system [8]. However, due to unpredictable compensated reactive power and expensive equipment costs, these solutions are unable to fully address power quality concerns.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Voltage Restorer with a Novel Robust control strategy to improve Power Quality issues in Distribution Network

2023

1st International Conference on Modern and Advanced Research Icmar 2023

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The incorporation of renewable energy sources into the electrical system has resulted in power quality (PQ) concerns like voltage sag and voltage swell. These issues affect sensitive loads and pose challenges in power distribution networks. To address these challenges, a recently introduced device called the Dynamic Voltage Restorer (DVR) offers a unique solution. This research focuses on mitigating voltage sag and voltage swell using a DVR and a sliding mode controller based on a rotating sliding surface. The DVR, incorporating energy storage similar to a DC battery, plays a vital role in averting voltage sags and swells by injecting high voltage for a brief period. When the DVR is connected between the voltage source and the load through an injection transformer, it effectively enhances the load voltage within the power distribution system. In contrast to conventional methods that rely on the grid, this suggested approach enables the system to independently address PQ issues like voltage sag and swell. Through simulated investigations using MATLAB/Simulink R2018a, the effectiveness of the proposed technique is demonstrated. The solution exhibits a mitigation time of 2 milliseconds and maintains total harmonic distortion below 5%, meeting IEEE criteria. As a result, the proposed solution is proven to be more efficient, straightforward, dependable, and adaptable.

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“…The design of sliding mode regulators supports the desired performance in a systematic way. It also requires fulfilling three conditions: transversality, equivalent control and reachability [18,19,22,23].…”

mentioning

confidence: 99%

“…In DC-DC converter applications, hysteresis comparators are commonly used to implement the proposed controller. To limit the switching frequency, a hysteresis band (h) must be introduced to the sliding surface [22,23]. As a result, the sliding surface's limits will be:…”

mentioning

confidence: 99%

Cascade sliding mode maximum power point tracking controller for photovoltaic systems

Hessad

Bouchama

Benaggoune

et al. 2023

Electrical Engineering & Electromechanics

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Introduction. Constant increases in power consumption by both industrial and individual users may cause depletion of fossil fuels and environmental pollution, and hence there is a growing interest in clean and renewable energy resources. Photovoltaic power generation systems are playing an important role as a clean power electricity source in meeting future electricity demands. Problem. All photovoltaic systems have two problems; the first one being the very low electric-power generation efficiency, especially under low-irradiation states; the second resides in the interdependence of the amount of the electric power generated by solar arrays and the ever changing weather conditions. Load mismatch can occur under these weather varying conditions such that maximum power is not extracted and delivered to the load. This issue constitutes the so-called maximum power point tracking problem. Aim. Many methods have been developed to determine the maximum power point under all conditions. There are various methods, in most of them based on the well-known principle of perturb and observe. In this method, the operating point oscillates at a certain amplitude, no matter whether the maximum power point is reached or not. That is, this oscillation remains even in the steady state after reaching the maximum power point, which leads to power loss. This is an essential drawback of the previous method. In this paper, a cascade sliding mode maximum power point tracking control for a photovoltaic system is proposed to overcome above mentioned problems. Methodology. The photovoltaic system is mainly composed of a solar array, DC/DC boost converter, cascade sliding mode controller, and an output load. Two sliding mode control design strategies are joined to construct the proposed controller. The primary sliding mode algorithm is designed for maximum power point searching, i.e., to track the output reference voltage of the solar array. This voltage is used to manipulate the setpoint of the secondary sliding mode controller, which is used via the DC-DC boost converter to achieve maximum power output. Results. This novel approach provides a good transient response, a low tracking error and a very fast reaction against the solar radiation and photovoltaic cell temperature variations. The simulation results demonstrate the effectiveness of the proposed approach in the presence of environmental disturbances.

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Power quality improvement using ultra capacitor based dynamic voltage restorer with real twisting sliding mode control

Cited by 7 publications

References 13 publications

A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

Dynamic Voltage Restorer with a Novel Robust control strategy to improve Power Quality issues in Distribution Network

Cascade sliding mode maximum power point tracking controller for photovoltaic systems

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