Quantifying the occurrence and duration of power fluctuations introduced by photovoltaic systems

Woyte, Achim; Thong, Vu Van; Purchała, Konrad; Belmans, Ronnie; Nijs, Johan

doi:10.1109/ptc.2003.1304368

Cited by 11 publications

(4 citation statements)

References 17 publications

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“…Some of the studies take the step changes to model the load and irradiance changes, which is highly unrealistic 69,70 . Moreover, if the load and generation curves are utilized, the resolution of the data is not high enough 71 .…”

Section: Limiting Constraintsmentioning

confidence: 99%

“…Some of the studies take the step changes to model the load and irradiance changes, which is highly unrealistic. 69,70 Moreover, if the load and generation curves are utilized, the resolution of the data is not high enough. 71 Intermittency of the PV generation due to cloud movements alone is not a source of flicker, 67,72 But if all the parameters defined above will be considered at the same time in the studies, the flicker value is bound to breach the standard value.…”

Section: Voltage Flickermentioning

confidence: 99%

See 1 more Smart Citation

Hosting capacity in distribution grids: A review of definitions, performance indices, determination methodologies, and enhancement techniques

Qamar

Arshad

Mahmoud

et al. 2023

Energy Science & Engineering

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For the past few years, the world has seen a great shift toward renewable energy resources from conventional ones. But the ever‐increasing integration of distributed generation (DG) to the electrical network leads to integration limiting constraints like overvoltage, under voltage, harmonics, equipment ampacity violations, and failure of protection schemes. Therefore, an extensive investigation of the methodologies in which DGs can be incorporated into the electrical network is presented in this manuscript. This article provides an extensive review of all the hosting capacity (HC) terms, references, limiting constraints of the studied networks, geographical segregation, and their determination methodologies. Moreover, the factors defining the HCs of various networks and the architectures employed to increase them, are also explained briefly in the conducted review study.

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Section: Limiting Constraintsmentioning

confidence: 99%

Section: Voltage Flickermentioning

confidence: 99%

Hosting capacity in distribution grids: A review of definitions, performance indices, determination methodologies, and enhancement techniques

Qamar

Arshad

Mahmoud

et al. 2023

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…To remove the effect of day-night cycles and allow the study of variation caused by clouds, the clearness index k t (2) can be used [14]. It relates the measured irradiance G against the modeled irradiance at the top of the atmosphere (extraterrestrial irradiance, G ext ) [15]:…”

Section: Irradiance Variabilitymentioning

confidence: 99%

Study on the Effect of Irradiance Variability on the Efficiency of the Perturb-and-Observe Maximum Power Point Tracking Algorithm

et al. 2022

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Irradiance variability is one of the main challenges for using photovoltaic energy. This variability affects the operation of maximum power point trackers (MPPT) causing energy losses. The logic of the Perturb-and-Observe MPPT algorithm is particularly sensitive to quick irradiance changes. We quantified the existing relation between irradiance variations and efficiency loss of the logic of the Perturb-and-Observe MPPT algorithm, along with the sensitivity of the MPPT to its control parameters. If the algorithm parameters are not tuned properly, its efficiency will drop to nearly 2%. Irradiance variability causes a systematic energy loss of the algorithm that can only be quantified by ignoring the hardware components. With this, we aim to improve the energy yield estimation by providing an additional efficiency loss to be considered in the calculations.

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“…A storage system made of batteries or ultracapacitor is required to compensate for changes in the solar irradiance or night-time power. From the simulation results presented in [1] and [15], this work presents the design of an ultracapacitor charge controller permitting to charge the ultracapacitor during the day and transfer the energy to the load when there is no solar irradiance. As the electronic devices required need two voltage levels, a design of a three winding flyback converter is done and regulated through a PID controller to keep its output constant despite any change in loads or the supply voltage.…”

Section: Introductionmentioning

confidence: 99%

A Secured Smart Home Switching System based on Wireless Communications and Self-Energy Harvesting

et al. 2019

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Due to human influence and its negative impacts on the world's environment, the world is changing into a cleaner and more sustainable energy system. In both private and public buildings, there is a desire to reduce electricity usage, automate appliances, and optimize the electricity usage of a building. This paper presents the design and implementation of a secured smart home switching system based on wireless communications and self-energy harvesting. The proposed secured smart home switching system integrates access control of the building's electricity, energy harvesting, and storage for the active electronic components and circuitries, and wireless communication for smart switches and sockets. The paper gives two contributions to the design of smart home systems: 1) A practical design and implementation of security (access control system) for a building's power supply which adds a locking feature such that only authorized personnel are capable of altering the power state of the smart sockets and switches in a building, and; 2) A model of energy harvesting and storage system for the active electronic components of the circuitries and wireless communication for smart switches and sockets. The access control involves four stages (a control unit, a comparator unit, a memory unit, and the switching unit). The access control system provides means of access control by having a security keypad that switches ON or OFF the building's electricity, provided the user knows the security pin code (8 coded pins). The proposed system also harvests and stores energy for all the active electronic devices using a photovoltaic system with ultracapacitor energy buffer. The designed secured smart home utilized smart power and switches, and message queuing telemetry transport for ease of controlling energy usage. The experimental results obtained from extensive testing of the prototype shows an improvement in security and energy management in a building.

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Quantifying the occurrence and duration of power fluctuations introduced by photovoltaic systems

Cited by 11 publications

References 17 publications

Hosting capacity in distribution grids: A review of definitions, performance indices, determination methodologies, and enhancement techniques

Hosting capacity in distribution grids: A review of definitions, performance indices, determination methodologies, and enhancement techniques

Study on the Effect of Irradiance Variability on the Efficiency of the Perturb-and-Observe Maximum Power Point Tracking Algorithm

A Secured Smart Home Switching System based on Wireless Communications and Self-Energy Harvesting

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