Impact of Utilizing PV Surplus Electricity on CO2 Emissions From the Residential Energy Systems

2017 ◽  
Author(s):  
Toshiyuki Nagai ◽  
Akira Yoshida ◽  
Yoshiharu Amano
Keyword(s):  
Co2 Emissions ◽  
Low Voltage ◽  
Energy Systems ◽  
Voltage Distribution ◽  
Distribution Grid ◽  
Residential Energy ◽  
Energy Storage Devices ◽  
Water Heater ◽  
Storage Devices ◽  
Residential Sector

In order to reduce CO2 emissions in the residential sector, the installation of photovoltaics (PV) has been increasing extensively. However, such large-scale PV installations cause problems in the low-voltage distribution grid of the residential sector, such as PV related voltage surges. In this study, the utilization of suppressed PV output through energy storage devices was proposed. Using demand side energy storage devices reduces voltage surge, transmission loss, and CO2 emissions from the residential buildings. The objective of this study was to add voltage constraints of the low-voltage distribution grid to an operational planning problem that we developed for the residential energy systems, and to quantitatively evaluate the potential of heat pump water heater (HP) to utilize the PV surplus electricity, while considering the electrical grid constraints based on the minimization of CO2 emissions. We found that when a 4.5 kW HP with 370 L storage, which utilizes PV output, was added to the system, the reduction in CO2 emissions was more than twice compared with that in the case of adding 4 kWh battery (BT) to a PV and gas fired water heater configuration. Further, the effect of utilizing the suppressed PV electricity by HP was almost equivalent to that by the BT. Therefore, the potential of HP in utilizing PV surplus electricity is higher than that of the BT in terms of CO2 emissions reduction in the residential sector.

scholarly journals The behaviour of a low voltage distribution network with crescent presence of photovoltaic generation and energy storage elements

2021 ◽  
Vol 19 ◽  
pp. 423-428
Author(s):  
Rafael Martins Leite ◽  
◽  
Jonas Villela de Souza ◽  
Eduardo Nobuhiro Asada ◽  
Mário Oleskovicz
Keyword(s):  
Energy Storage ◽  
Power Quality ◽  
Low Voltage ◽  
Voltage Drop ◽  
Voltage Distribution ◽  
Distribution Grid ◽  
Energy Storage Devices ◽  
Photovoltaic Generation ◽  
Electricity Grid ◽  
Voltage Unbalance

This paper aims to examine the increasing integration of distributed energy resources in the low voltage distribution grid. Considering the current increasing of distributed photovoltaic generation in Brazil, there is a deterioration of specific indices related to power quality, such as overvoltage and voltage unbalance. In this sense, a survey of these problems, the severity assessment via simulation of a real system and the proposal of improvement in the associated indexes using energy storage devices are made. The resulting analyses contemplate both the current reality of growth in the distributed photovoltaic generation and the joint integration of these generators with energy storage systems, thus enabling a comparison of results focusing on the electricity grid impacts. The study has improved the network's operation, reducing the power quality aggravating factors and increasing the local consumption of the energy generated locally. The total losses on the original network were reduced by up to 52.6%, the voltage drop to 74.7% and the voltage rise was completely eliminated.

scholarly journals Impact of Solar Panel Orientation on the Integration of Solar Energy in Low-Voltage Distribution Grids

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Joannes I. Laveyne ◽  
Dimitar Bozalakov ◽  
Greet Van Eetvelde ◽  
Lieven Vandevelde
Keyword(s):  
Low Voltage ◽  
Real Life ◽  
Solar Panel ◽  
Solar Panels ◽  
Voltage Distribution ◽  
Distribution Grid ◽  
Voltage Balance ◽  
Residential Distribution ◽  
The Impact ◽  
Distribution Grids

In Belgium, and many other countries, rooftop solar panels are becoming a ubiquitous form of decentralised energy production. The increasing share of these distributed installations however imposes many challenges on the operators of the low-voltage distribution grid. They must keep the voltage levels and voltage balance on their grids in check and are often regulatory required to provide sufficient reception capacity for new power producing installations. By placing solar panels in different inclinations and azimuth angles, power production profiles can possibly be shifted to align more with residential power consumption profiles. In this article, it is investigated if the orientation of solar panels can have a mitigating impact on the integration problems on residential low voltage distribution grids. An improved simulation model of a solar panel installation is constructed, which is used to simulate the impact on a residential distribution grid. To stay as close to real-life conditions as possible, real irradiation data and a model of an existing grid are used. Both the developed model as the results on grid impact are evaluated.

Synergy of photovoltaic generators and Electric Vehicles in a low voltage distribution grid

2011 ◽  
Author(s):  
J. L. Calero Lagares ◽  
J. M. Roldan Fernandez ◽  
Manuel Burgos Payan ◽  
Jesus M. Riquelme Santos
Keyword(s):  
Electric Vehicles ◽  
Low Voltage ◽  
Voltage Distribution ◽  
Distribution Grid ◽  
Photovoltaic Generators
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