An improved grid-connected photovoltaic power generation system with low harmonic current in full power ranges

Sun, Xiaodong; Fan, Tai; An, Shaoliang; Zhang, Qi; Zhang, Bo

doi:10.1109/peac.2014.7037893

Cited by 3 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When a failed node suddenly appears in the monitoring system, the constraints of the coverage auto-recovery model in the monitoring system in this case are as in formulas (5)(6)(7)(8), which is denoted as follows:…”

Section: Node Deployment Of Distributed Radiation Detector Systemmentioning

confidence: 99%

“…With the continuous decline of photovoltaic cell prices and the continuous improvement of photovoltaic power generation efficiency, the photovoltaic industry develops rapidly, and the research on the photovoltaic grid-connected power generation system has become a new research hotspot. The power generated by the photovoltaic grid-connected power generation system occupies an increasing proportion in the whole power system, which will affect the power quality of the power grid and even threaten the safe and stable operation of the power grid [5]. To meet the needs of the rapid popularization and development of distributed photovoltaic power generation systems, improve the ability of power systems to accept and control them, and ensure the reliable operation of the grid under the condition of largescale access, the operating conditions of distributed photovoltaic power generation systems must be real-time monitoring and analysis.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-Resolution Distributed Radiation Detector System Assisted by Intelligent Image Recognition

Shao

Wang

et al. 2021

Front. Phys.

View full text Add to dashboard Cite

With the development of machine learning and image recognition technology, the detector system tends to be standardized and intelligent. However, large numbers of distributed radiation detectors connected to the power grid will bring huge uncertainty to the operation of the power grid and even cause certain interference. The monitoring system of the distributed radiation detectors can control the running status of the distributed photoelectric detection system in real-time and guarantee the safe and stable operation of the detector system. This article proposes an improved genetic detector system to avoid “blind spots” in the radiation detector monitoring based on the characteristics of photovoltaic (PV) arrays, which are considered as individual pixels, and then the reliability of the monitoring is ensured by the monitoring coverage of these pixels by the detector nodes. The performance of the radiation detector monitoring is restored by activating those spare nodes with sufficient energy to replace those that fail, ensuring that the distributed detection system can be monitored in a timely and efficient manner at all times. The simulation results confirm the reasonable validity of the algorithm.

show abstract

Section: Node Deployment Of Distributed Radiation Detector Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Resolution Distributed Radiation Detector System Assisted by Intelligent Image Recognition

Shao

Wang

et al. 2021

Front. Phys.

View full text Add to dashboard Cite

show abstract

“…This enhances the cost and the vulnerability of the studied system. Moreover, in other approaches, a slave inverter is used to improve the power quality of the current of the master inverter that flows to the grid [25]. However, using two inverters increases the cost of the system, total switching loses and control complexity.…”

Section: Introductionmentioning

confidence: 99%

Voltage harmonic injection angle optimisation for grid current harmonics using a PV converter

Bouloumpasis

Vovos

Georgakas

2019

IET Power Electronics

View full text Add to dashboard Cite

In this work, the impact of voltage harmonic injection angle on grid current harmonics using a power converter supplied by photovoltaic (PV) array is studied. Converter and PV non-linear operation cause harmonic distortion, which is superimposed to the existing harmonic content of the grid. First, a general mathematical expression connecting voltage harmonic injection angle and current distortion at the same frequency is theoretically proven. This general expression is verified by experimental results for various converter output levels and grid properties, and voltage harmonic injections at various orders and amplitudes. Since the expression is a convex function, there is a unique injection angle that minimises overall current harmonic at the same frequency. The second contribution of this research is that with a minimum of three injections at random angles the parameters of the general expression can be calculated, thus the optimum injection angle can be determined. In comparison to other works, the knowledge of converter harmonic properties, grid harmonic content or grid connection type (inductive, ohmic, mixed) is not needed.

show abstract

A systematic review of grid-connected photovoltaic and photovoltaic/thermal systems: Benefits, challenges and mitigation

Hamid

Mbungu

Elnady

et al. 2022

Energy & Environment

View full text Add to dashboard Cite

Solar energy is the powerhouse where all potential and classified renewable energies lug their sources. The energy transformation from the Sun to electricity requires an adequate control scheme to maximise the generated power and enhance the system efficiency. Besides, more than half of solar irradiation on conventional PV panels is lost. The PV/T modules have been introduced to convert the lost irradiation to heat. Thus, a systematic review of system components, development, and strategies for grid-connected solar Photovoltaics (PVs) plants is presented. Two solar PVs, traditional PV and thermal (PV/T), are evaluated. Each grid-tied PV component is considered a subsystem to analyse the potential improvement of grid-connected PVs. This is from solar resources to grid-tied PV inverter techniques. An intensive assessment of the system improvements is presented to evaluate PV plants’ benefits, challenges, and potential solutions. The improvement trends for the novel generation of grid-connected PV systems consist of applying innovative approaches. It is also found that intelligent strategies optimally ensure the overall efficiency of grid-tied PVs using real-time control and measurement under innovative applications and technologies. These methods effectively assist in enhancing grid-tied diverse solar power approaches. Therefore, this paper would offer a significant foundation for advanced research into the subject of grid-tied PV and PV/T and their innovation and/or technology development.

show abstract

An improved grid-connected photovoltaic power generation system with low harmonic current in full power ranges

Cited by 3 publications

References 5 publications

High-Resolution Distributed Radiation Detector System Assisted by Intelligent Image Recognition

High-Resolution Distributed Radiation Detector System Assisted by Intelligent Image Recognition

Voltage harmonic injection angle optimisation for grid current harmonics using a PV converter

A systematic review of grid-connected photovoltaic and photovoltaic/thermal systems: Benefits, challenges and mitigation

Contact Info

Product

Resources

About