Impact of a photovoltaic system to voltage variation and power losses on distribution feeders

2013 ◽  
pp. 249-252
Author(s):  
Wei-Lin Hsieh ◽  
Chia-Hung Lin ◽  
Chao-Shun Chen ◽  
Cheng-Ting Hsu ◽  
Chin-Ying Ho ◽  
...  
Keyword(s):  
Photovoltaic System ◽  
Power Losses ◽  
Voltage Variation

Upon Power Loses due to Current Harmonics in a Fotovoltaic System, Opperating at Maximum Power Point

2013 ◽  
Vol 853 ◽  
pp. 352-357
Author(s):  
Calin Chioreanu
Keyword(s):  
Electronic System ◽  
Pollution Source ◽  
Maximum Power ◽  
Photovoltaic System ◽  
Power Losses ◽  
Maximum Power Point ◽  
Current Harmonics ◽  
Solar Battery ◽  
Harmonic Pollution ◽  
Power Point

Photovoltaic panels (PF), combined with lead-acid battery (AE), are increasingly used, to produce electricity. To work in maximum power points, between (PF) and (AE) is interposed a static converter (DC-DC), which is a harmonic pollution source. Within the paper there are calculated the power losses, due to current harmonics, of a photovoltaic system working at its maximum power. Photovoltaic system works at its maximum power, if in the electronic system there is permanently voltage control among solar battery terminals.

Systematic photovoltaic system power losses calculation and modeling using computational intelligence techniques

2021 ◽  
Vol 284 ◽  
pp. 116396
Author(s):  
Behzad Hashemi ◽  
Shamsodin Taheri ◽  
Ana-Maria Cretu ◽  
Edris Pouresmaeil
Keyword(s):  
Computational Intelligence ◽  
Photovoltaic System ◽  
Power Losses ◽  
System Power

scholarly journals Photovoltaic Placement for Losses Reduction and Voltage Stability Enhancement in the Port Moresby System, Papua New Guinea

2021 ◽  
Vol 56 (2) ◽  
pp. 542-551
Author(s):  
Ardiaty Arief ◽  
Muhammad Bachtiar Nappu ◽  
Ian Thomas
Keyword(s):  
Papua New Guinea ◽  
Voltage Stability ◽  
Power Grid ◽  
New Guinea ◽  
Capital City ◽  
Photovoltaic System ◽  
Voltage Profile ◽  
Power Losses ◽  
Long Distance ◽  
Port Moresby

The power grid in the capital city of Papua New Guinea, Port Moresby, still experiences problems of voltage stability and power losses due to many factors which is the common problem that most power systems continue to mitigate until today. The factors that give rise to these problems are the imbalance between generation and load and the long-distance of transmission lines. A possible solution to counteract these problems is to integrate photovoltaic systems into the power grid, especially at the load distribution network. This paper presents PV placement for Port Moresby system by using two stages, which are (1) identification of location with good irradiance then (2) determination of PV location by minimizing power losses and improving the voltage profile. This alternative approach is considered because Port Moresby city is situated in a location that is exposed to a significant amount of solar radiation of about 1976 kWh/m2 GHI annually. Therefore, this makes Port Moresby a suitable location to utilize this type of renewable energy technology. This research provides an analysis of the power flow within the Port Moresby grid through simulation using the Newton-Raphson method. The analysis and simulations are performed to identify the most sensitive buses within the system. Based on their high irradiance levels, these specific areas are identified as the best possible areas for integrating the photovoltaic system.

Durability of Materials in a Stress-Response Framework: Acrylic Materials for Photovoltaic Systems

2012 ◽  
Vol 1391 ◽  
Author(s):  
Myles P. Murray ◽  
Laura S. Bruckman ◽  
Roger H. French
Keyword(s):  
Solar Radiation ◽  
Real Time ◽  
Accelerated Testing ◽  
Photovoltaic System ◽  
Power Losses ◽  
Reliability Engineering ◽  
Pv System ◽  
Pv Systems ◽  
Photovoltaic Materials ◽  
Degradation Rates

ABSTRACTIn the development of novel materials for enhanced photovoltaic (PV) performance, it is critical to have quantitative knowledge of the initial performance, as well as the performance of these materials over the required 25-year lifetime of the PV system. Lifetime and degradation science (L&DS) allows for the development of new metrology and metrics, coupled to degradation mechanisms and rates. Induced absorbance to dose (IAD), a new metric being developed for solar radiation durability studies of solar and environmentally exposed photovoltaic materials, is defined as the rate of photodarkening or photobleaching of a material as a function of total absorbed solar radiation dose. In a reliability engineering framework, these quantitative degradation rates can be determined at various solar irradiances making possible real time and accelerated testing. The potential to predict power losses in a photovoltaic system over time caused by the accumulation of this kind of degradation can be calculated for real time applications or extrapolated for accelerated exposure conditions. Three formulations of poly (methyl methacrylate) (PMMA) used for mirror augmented PV systems were analyzed for the changes in IAD after accelerated testing.

Influence of the Proposal of a Photovoltaic System on Electrical Losses

2020 ◽  
pp. 1-4
Author(s):  
Alvaro Laurencio Pérez ◽  
◽  
Olga Pérez Maliuk ◽  
Igor Pérez Maliuk ◽  
◽  
...  
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Total Energy ◽  
Electrical Energy ◽  
Photovoltaic System ◽  
Energy Losses ◽  
Empirical Equations ◽  
Power Losses ◽  
The World ◽  
The Impact

For the year 2017, renewable energy in the world through photovoltaic systems constitutes around 21% of the total energy generated through renewable sources. In this work, the impact represented by the proposal of a photovoltaic system connected to the grid in terms of reducing losses was analyzed. In the study, the calculation tools PVSyst and DIgSILENT PowerFactory were used to determine the power generation of the photovoltaic installation. Using the Radial 7.7 tool, the power losses were determined. The energy losses of the line were determined using empirical equations developed in the literature discussed. The commissioning of the installation represents a saving of 397 MWh/year. The impact that the installation represents on the grid is represented by a decrease in electrical energy losses and not in the decrease in power losses.

Rooftop photovoltaic system allocation to improve the distribution transformers life span using golden ratio optimization algorithm

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mohammad Amin Sobouti ◽  
Mehdi Bigdeli ◽  
Davood Azizian
Keyword(s):  
Optimization Algorithm ◽  
Power Loss ◽  
Golden Ratio ◽  
Reducing Power ◽  
Photovoltaic System ◽  
Optimal Size ◽  
Power Losses ◽  
Content Type ◽  
Distribution Transformers ◽  
Ratio Optimization

Purpose This paper aims to evaluate the effect of optimal use of rooftop photovoltaic (PV) systems on improving the loss of life (LOL) of distribution transformers, reducing power losses as well as the unbalance rate of the 69-bus distribution network. Design/methodology/approach The problem is studied in three scenarios, considering different objective functions as multi-objective optimization in balanced and unbalanced operations. Meta-heuristic golden ratio optimization method (GROM) is used to determine the optimal size of the rooftop PV in the network. Findings The simulation results show that in all scenarios, the GROM by optimally installing the rooftop PV is significantly capable to reduce the transformer distribution loss of loss, unbalance rate and power loss as well as reduce the temperature of the oil and transformer winding. Also, the lowest %LOL, power loss and unbalance rate occurred in the second scenario for the balanced network and first scenario, respectively. In addition, the results showed that the unbalance of the network results in increased power losses and LOL of the distribution transformer. Originality/value The better capability of GROM is proved compared with the grey wolf optimization algorithm with better objective function and by achieving better values of LOL, unbalance rate and power loss. The results also showed that the %LOL, unbalance and power losses are weakened compared to without considering the PV cost but the achieved results are realistic and cost-effective.

Spectroscopic Diagnostics of Tokamaks

1988 ◽  
Vol 102 ◽  
pp. 165-174
Author(s):  
C. de Michelis
Keyword(s):  
Transport Properties ◽  
Power Losses ◽  
Spectroscopic Diagnostics ◽  
Important Concern

AbstractImpurities being an important concern in tokamaks, spectroscopy plays a key role in their understanding. Techniques for the evaluation of concentrations, power losses and transport properties are surveyed, and a few developments are outlined.

Power Losses in RF Inductor of Ferrite-Free Closed-Loop Inductively-Coupled Low Pressure Mercury Lamps

2020 ◽  
pp. 89-94 ◽  
Author(s):  
Ekaterina V. Lovlya ◽  
Oleg A. Popov
Keyword(s):  
Closed Loop ◽  
Low Pressure ◽  
Mercury Vapour ◽  
Plasma Power ◽  
Power Losses ◽  
Inductive Discharge ◽  
Inductively Coupled ◽  
Radial Inhomogeneity ◽  
Transformer Model ◽  
Rf Inductor

RF inductor power losses of ferrite-free electrode-less low pressure mercury inductively-coupled discharges excited in closed-loop dielectric tube were studied. The modelling was made within the framework of low pressure inductive discharge transformer model for discharge lamps with tubes of 16, 25 and 38 mm inner diam. filled with the mixture of mercury vapour (7.5×10–3 mm Hg) and argon (0.1, 0.3 and 1.0 mm Hg) at RF frequencies of 1, 7; 3.4 and 5.1 MHz and plasma power of (25–500) W. Discharges were excited with the help of the induction coil of 3, 4 and 6 turns placed along the inner perimeter of the closed-loop tube. It was found that the dependence of coil power losses, Pcoil, on the discharge plasma power, Ppl, had the minimum while Pcoil decreased with RF frequency, tube diameter and coil number of turns. The modelling results were found in good qualitative agreement with the experimental data; quantitative discrepancies are believed to be due skin-effect and RF electric field radial inhomogeneity that were not included in discharge modelling.

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