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Solar panel arrangement on the roof of the office building (designed by SketchUp 3D software, Trimble Inc, Sunnyvale, CA).
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At present, renewable energy sources are considered to ensure energy security and combat climate change. Vietnam has a high potential for solar power development, especially in the central region and the southern region. However, the northeast region has the lowest solar radiation value, so it can cause difficulty for rooftop solar power investment...
Context in source publication
Context 1
... office building in Hanoi city with an approximate height of 25 m and a roof area of 152 m 2 , the roof direction is North-South. The corrugated iron roof of the building in Figure 4 is a sloping roof on both sides, and there is no ventilation pipe between the roofs. The roof area is open, spacious, and unobstructed by trees, so the roof surface is suitable for installing a solar panel system. ...
Citations
... However, in the lightning arrester leakage current detection, due to the white noise interference in the sensor's circuit and electromagnetic pulse interference in the field environment, the measurement of weak leakage current signal will be mixed with a lot of noise interference signals, which will lead to the measured results will be with the actual current value of the existence of a large error. If it is not possible to realize the 8 VOLUME XX, 2017 accurate measurement of weak leakage current, it is easy to cause a state recognition error, protection switch malfunction, false alarm, etc., which will cause the work burden to the station operation and maintenance personnel and affect the safe and stable operation of the power distribution system [9][10][11]. Currently, the main methods for removing interference from the leakage current of network-type surge arresters include Empirical Mode Decomposition (EMD), Wavelet Packet Transform (WPT), morphological filtering, adaptive digital filtering, etc. ...
Leakage current is one of the important parameters reflecting the operation status of distribution network-type surge arresters. At this stage, the polymagnetic current sensor has the advantages of miniaturization and high accuracy for leakage current measurement, but the complexity of electromagnetic interference in the field easily introduces more noise interference signals, which limits the performance of the polymagnetic current sensor for field application. To this end, this paper proposes a leakage current measurement method for distribution network-type surge arresters based on EEMD-SVD and low-rank RBF neural network methods. Firstly, the measured leakage current is decomposed by Ensemble Empirical Mode Decomposition (EEMD) to decompose the modal components containing eigenfrequencies, and then Singular Value Decomposition (SVD) is used to extract the non-eigenfrequency signals. Finally, a low-rank Radical Basis Function (RBF) neural network is used to approximate the leakage current signal after de-interference and combined with the Gaussian window function to remove the white noise interference. The experimental results show that the signal-to-noise ratio of the polymagnetic current sensor is improved by about 20dB and the maximum average absolute error is only 2.62%, which can truly reflect the leakage current of the network-type lightning arrester.
... Along with the rapid development of solar power systems, Vietnam also has much research on the possibility of developing solar power in general and rooftop solar power in particular (Le et al., 2022;Phap et al., 2020;Thanh et al., 2021;Pham et al., 2022). In addition, the impact of solar power systems on the utility grid is also being studied (Tien et al., 2023;Van-Tan and Cao, 2021;Heckmann et al., 2022). ...
Vietnam has developed solar power very quickly in recent years. However, the integration of the solar power system into a distribution power grid can cause a clear effect on the voltage of the grid. Accordingly, the voltage at the nodes increases significantly because of the appearance of photovoltaic (PV) systems, and it can lead to overvoltage at some load nodes near the solar power source. The impact of solar power stations with distribution power grids depends on the location and operating conditions of the utility grid. Therefore, the study of the impact of rooftop solar power on the distribution grid needs to add actual operating data of the utility grid to achieve a more detailed assessment and reliability. This study analyzed the influence of rooftop solar power on a low voltage distribution power grid in Ha Tinh province, Vietnam with the support of ETAP software. The scenario was calculated for 50% of the power (3-phase) penetration gain of the transformer. Besides, a proposed synthetic solution is a combination of reactive power compensation with a 5kVAr minimum compensation level at many points on the grid and adjustment of the load tap at the appropriate level depending on the load situation of the transformer. Thus, the voltage of the nodes on the power grid is improved, and the power loss is also decreased.
... In this case, the electricity demand is met by the PV solar system and the surplus energy is stored in batteries to use it at night or when solar radiation absent in bad weather (cloud ,rain dust), and when needing to the electrical energy that this system can take it from utility grid [43] as shown in Figure ( ...
Energy is one of the main ingredients for the development and maintenance of a
modern society with benefits of its socio-economic and technological
advancements. Providing energy for homes and buildings, agriculture,
transportation, services, and industries in a sustainable way and at the same time
guaranteeing resources for the future generations is the ultimate challenge for
humanity. The first part includes assessment of the performance of HIT PV solar
system under Baghdad/Iraq weather. The current PV Solar system is a 15 kWp of
HIT grid-tied. HIT PV Solar systems was installed in Al-Wazeeriah District,
Baghdad city (latitude 33.3 °N, longitude 44.4 °E at 41m above the sea level). HIT
is the abbreviation of Heterojunction with Intrinsic Thin-layer. The current system
is monitored throughout the year 2020.
... The CO 2 emission reduction is also estimated using Eq. (1) [27]. ...
Photovoltaic (PV) energy has emerged as a beneficial source when considering several factors, such as clean power generation, the reduction of glasshouse gas emissions, and the cost-competitiveness of power supply compared to other energy sources. Bangladesh is utilising rooftop areas for PV installations for homes, but ground-mounted installations cannot fully utilise this promising source due to extreme land constraints. If PV systems could be installed along the embankment of a railway track, it would provide a unique opportunity for renewable power generation. Thus, the aim of the study is to conduct a techno-economic study of a grid-connected photo-voltaic plant besides the railway track for rural applications in Bangladesh. The PVsyst modelling tool has been utilised to investigate the performance of a 128 kW power plant. The proposed plant has an annual output of 186.3 MWh, a capital cost of US$124,688, an annualised cost of US$4,748, a levelized cost of US$0.052/kWh, a performance ratio of 77.3%, and a payback period of 8.4 years. In its 25-year lifespan, the facility may cut CO2 emissions by 2,185 tnes. The study demonstrates the possibility of multi-megawatt solar power generation along the railway tracks throughout the country. The findings of this study can be used to enhance solar power generation in Bangladesh and other countries, especially where land is scarce.
... The PVsyst simulation revealed that the CO 2 emission reduction was 955,923 tonnes for a 5 • tilt and 1,041,273 tonnes for a 24.7 • tilt in the entire 25-year project lifetime, as shown in Fig. 8. To evaluate the reduction in annual average CO 2 emissions, the following formula has been used for utility electric power [59]: ...
The development of large-scale, ground-mounted photovoltaic power generation in areas with limited land is extremely difficult, especially in some countries where more than 1,100 people reside per square kilometre. Considering land's utilisation for food production, housing, and industrialisation a priority, floating solar photovoltaic (FSPV) systems, which involve mounting PV cells on a floating device on the surface of a water body, can provide a practical solution for both renewable power generation and the conservation of scarce land. Although some studies emphasise the potential benefits of FSPV, no comprehensive techno-economic and environmental study is reported in the open literature in the context of a country where landmass is nearly impossible to utilise for photovoltaic power generation. Hence, the article focuses on a techno-economic and environmental study of a 50 MW FSPV power plant for a marsh area in an extremely densely populated country using PVsyst simulation tools. The findings of the study show the levelized cost of energy (LCOE) of the 50 MW FSPV plant is US$ 0.051/kWh, which is a decent lower compared to US$ 0.087/kWh for fossil fuel-based power plants in the case study nation. Furthermore, the proposed FSPV offers reductions in CO 2 , water evaporation, and biodiversity conservation in marshlands.
... Vu Minh Phap et al. [2] installed a PV system on the building's rooftop with a total capacity of 56.7 kWp, and found that it can generate a total annual electricity production of 68625 kWh. Similarly, Tung Nguyen Thanh et al. [21] investigated the benefits of a PV system installed on a building in Hanoi using VSYST software. Their system had a total electricity power of 3080 Wp and included a 3 kW hybrid inverter. ...
Vietnam has pledged to reduce methane emissions by 30%, increase renewable energy utilization,
and decrease coal-based electrical power, with a goal of achieving net-zero carbon dioxide emissions
by 2050. Among renewable energy sources, solar energy has gained attention due to Vietnam’s
favorable location near the equator. This study aims to evaluate the economic feasibility of solar
energy generation in Vietnamese households, focusing on the north, middle, and south regions.
Using the Ecotect software, the study assesses the potential for solar energy production, while
also examining the country’s solar power policy for electricity production. Through this analysis,
the research aims to identify any weaknesses in the current policy and recommend possible solutions
to maximize the economic benefits of solar energy development. The findings of this study are expected
to provide insights into the economic feasibility of solar energy generation in Vietnamese households,
as well as inform policymakers about the shortcomings of the current solar power policy. Ultimately,
this research aims to support Vietnam’s transition towards a sustainable and prosperous future, in
line with the country’s long-term goals for reducing carbon emissions and increasing the utilization
of renewable energy.
... Several works have simulated the option of feeding the central power grid with large solar or wind renewable energy plants (Le et al., 2018;Truong et al., 2021;Viet et al., 2018). Nguyen and Van (2021) and Thanh et al. (2021) analyze a grid-connected rooftop solar system for a household in urban settings. Decentralized solutions in the rural energy conditions have scarcely been evaluated. ...
... As shown in the third sensitivity analysis, the costs of BS do not influence the investment decisions as grid usage is always more economical under current tariffs than BS investments. Thanh et al. (2021) validates these results, but argues that in light of deteriorating energy security, e.g., power grid failures, back-up batteries are useful and in some instances necessary. ...
... In the demonstration, the software's results are validated with findings from related simulation research showing that energy systems powered by RES reduce environmental pollution and contribute to energy security, but must be financially supported through governmental incentives, see, e.g., Nguyen and Van (2021); Thanh et al. (2021); Tran et al. (2021); Nguyen et al. (2019a). However, this type of analysis is subject to the conflict between accuracy and generalizability, which means that transferring them to other energy projects should be done with caution. ...
Renewable energies provide effective sustainable development by raising living standards, accelerating economic growth, and mitigating pollution. However, specifically in developing countries, the lack of information, data, and local expertise challenges the design process and long-term success of renewable energy systems. Following the call for inter-disciplinary, solution-oriented research, this work uses a design science research-approach to facilitate multi-energy planning. The decision support system NESSI4D is developed, which considers site-specific economic, environmental, technological, and social factors and is tuned for stakeholder needs in developing countries. Following a step-by-step process model manual, the artifact’s applicability is demonstrated in a use case for a rural community in Thua Thien-Hue, Vietnam. Missing load data are synthesized from the TVSEP with the software RAMP. The results show that the implementation of renewable energy technologies only enables affordable, low-emission electrification with governmental financial incentives. Several sensitivity tests illustrate the impact of changing assumptions and highlight the importance of detailed analyses with highly specialized tools. The demonstrating use case validates the method’s relevance for research and practice towards the goals of effective sustainable development.
... To evaluate the reduction of annual average CO 2 emission, the following formula has been utilized for the utility electric power [49]: ...
A floating solar photovoltaic (FSPV) power plant is an emerging power generation endeavour offering higher electricity generation potential and lower land cost than the ground-mounted photovoltaic power plant. Moreover, FSPV plants can be installed in comparatively low-cost and mostly unused water surfaces like reservoirs, lakes, offshore, etc. However, a comprehensive techno-economic study is paramount to utilize the full potential of a floating solar photovoltaic. Hence, the aim of this study is to undertake the techno-economic and environmental feasibility of a 50 MW FSPV power plant for the marsh area in Bangladesh. The plant comprised a total of 90,912 solar panels, 253 inverters, 20 transformers, and related accessories. The capital cost and levelized cost of energy (LCOE) of the plant are estimated at US$ 60,315,380 and US$ 0.051/kWh, respectively. The study shows that the designed FSPV can reduce 955,923 tonnes of CO2 emission in its operational lifetime. In addition, a novel aerodynamically designed floater has been proposed to ensure the fish sanctuary feature with the FSPV. The co-benefit sanctuary-creating feature of the power plant can conserve indigenous fish and aquatic species and yield higher fish production in the peripheral regions.
... The implementation of a renewable grid will play a major role in reducing future emissions [4], however reducing demand for energy worldwide is often cited as the most effective method to achieve climate targets [5]. In urban spaces, localised energy generation for commercial spaces through rooftop solar has risen in popularity [6], as well as the implementation of various technologies to reduce energy use [7]. For example, green roofs are often used for their range of benefits such as thermal insulation, however in recent years the adoption of Bio-solar green roofs (BSGR) for both thermal insulation and increase solar energy outputs has been adopted [8][9][10]. ...
In urban spaces, localised energy generation through rooftop solar has become increasingly popular, and green roofs are often used for a range of services such as thermal insulation. In recent years, the adoption of Bio-solar green roofs (BSGR) for both thermal insulation and increased solar energy outputs has increased. Here we present two buildings of the same dimensions and location, similar age and construction material, where one hosts a BSGR, and the other a conventional solar roof (CSR) in Sydney, Australia. Each solar array hosted a range of environmental sensors, including ambient temperature and global horizontal irradiance (GHI). The modelled BSGR average hourly energy output was 4.5% higher than the CSR (seasonal trends observed Spring; 4.14%, Summer; 4.16%, and Autumn; 5.21%) with BSGR producing 14.26 MWh more than the CSR, valued at $4526.22 AUD, and equal to 11.55 t e-CO2 greenhouse gas mitigation. Further potential for up to 1.55 t of CO2 could be mitigated by the plant material on the roof, provided the trimming of plant material during maintenance is conducted responsibly. In this instance, the implementation of a BSGR increased the system's solar output by 23.88 kWh per m² of panel coverage, as well as reducing the e-CO2 emissions by 0.019 t per m² over the CSR. When compared to the results of previously reported pilot studies and some simulations, it is evident that the implementation of a BSGR is favourable for maximising energy production and the mitigation of GHGs.
... In Vietnam, grid-connected solar power projects have been developed in recent years and they are considered a useful solution to contribute to ensuring energy security and combating climate change [21][22][23]. The Government of Vietnam has issued some mechanisms and policies to develop solar power source [24][25][26]. ...
... The results of the simulation of the grid-connected solar power station at the Electric Power University based on Meteonorm data and NASA data will be compared with the actual power generation results of the grid-connected solar power station at the Institute of Energy Science [21] due to its location on Hoang Quoc Viet Street, Hanoi city, as shown in Figure 11. Global solar irradiance data in Hanoi area is obtained from the ground measurement station of the World Bank (WB) [36] to calculate the amount of electricity generated by the rooftop solar power station at the Institute of Energy Science (IES) as can be seen in Table 4 and Figure 12. ...
People are increasingly using clean energy sources, contributing to environmental protection according to the general trend of the world. In the form of renewable energy, solar energy has contributed to solving current pressing problems, such as environmental pollution and air pollution, improving people’s quality of life. The design of solar power projects in Vietnam is mainly based on meteorological data sources from Meteonorm and NASA. However, the accuracy assessment of two data sources compared to the actual solar power data in Vietnam is not available, so there is no basis to determine better meteorological data source quality to serve the design of rooftop solar power projects. The content of this paper analyzes the simulation results of a typical rooftop solar power station at the Electric Power University, Hanoi city based on meteorological data sources from Meteonorm and NASA. After that, the simulation results will be compared with the actual operating data of a rooftop solar power station near the Electric Power University and other real PV systems in the world. The study results showed that the amount of electricity production using the Meteonorm meteorological data was closer to the actual data than the NASA data source. Therefore, solar power projects in Vietnam should use Meteonorm data source for the design process to determine the best economic and technical efficiency for investors.
