scholarly journals Investigation of the reliability of the IPS of South in connection with the acquisition of new concentrated loads (part 2)

2018 ◽  
Vol 11 (3) ◽  
pp. 192-199
Author(s):  
V. A. Nepomnyashchiy
Keyword(s):  
Direct Current ◽  
Electric Energy ◽  
Energy System ◽  
Economic Feasibility ◽  
Economic Conditions ◽  
Reliability Level ◽  
Social And Economic Development ◽  
Economic Necessity ◽  
Basic Network ◽  
Further Development

In part 2 of the paper, technical and economic necessity is substantiated of commissioning of the second circuit of 500 kV “Rostov NPP-Shakhty” (without extending the same to substation 500 kV Rostovskaya) and construction of OHPL 500 kV from substation Rostovskaya to substation Taman. This will enable to increase the supply of power to the Crimean “energy bridge” to transmit the same to the Crimean energy system up to 800–850 MW and to raise the probability of failsafe operation of the basic network to 0.986, i.e., reduce the time of emergency conditions of basic networks to 130 hrs/year, improving the reliability level of the network, which existed before the connection of the Crimean energy system.Further social and economic development of tourist and resort areas of Krasnodar Territory and Crimea can ensure, with proper stimulating economic conditions, a growth of power consumption and loads of Krasnodar Territory and Crimea with a factor of 1.5–2, particularly in summer. Therefore, it is necessary to explore the technical and economic feasibility of two options of construction in Krasnodar Territory or in Crimea of a new power plant with a capacity of up to 1000 MW and reconstruction of the Crimean energy bridge for transmission of direct current. This will double the throughput of the “energy bridge” to the capacity of nearly 2 million kW, which, combined with further development of power-generating facilities of the Crimean energy system, will enable to supply the Trans-Dniester and the Bug areas with electric energy, if necessary.In case of switching the Crimean “energy bridge” to direct current, with a capacity of up to 2 mln kW to be transmitted through this bridge, it will be necessary to strengthen electric links, with these to be switched to the voltage 500 kV between substation Kafa (the point of connection of the “energy bridge” to the Crimean energy system), Simferopol and Sevastopol.This matter is supposed to be considered in subsequent studies of reliability of power supply of Crimea.

scholarly journals Exploring Opportunities and Challenges of Solar PV Power under Carbon Peak Scenario in China: A PEST Analysis

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3061
Author(s):  
Hengtian Wang ◽  
Xiaolong Yang ◽  
Xinxin Xu ◽  
Liu Fei
Keyword(s):  
Solar Pv ◽  
Effective Measure ◽  
Industry Chain ◽  
Social And Economic Development ◽  
Excessive Consumption ◽  
Set Up ◽  
Political Economic ◽  
Installed Capacity ◽  
Further Development ◽  
Carbon Peak

China has experienced rapid social and economic development in the past 40 years. However, excessive consumption of fossil fuel energy has caused an energy shortage and led to severe environmental pollution. To achieve sustainable development, China is striving to transform its growth mode. Adopting renewable energy (RE) including solar photovoltaic (PV) power is an effective measure. How to promote the further development of solar PV power under the scenario of China’s aspirational target of carbon peak by 2030 and 20% RE ratio in the energy mix remains a theme that need to be addressed. This paper analyzes the potential opportunities and challenges confronting solar PV power in China. The analysis covers the dimensions of political, economic, social, and technological (PEST). The results revealed a significant prospect for the further deployment of solar PV power in the coming decades. The aggressive estimated installed capacity of solar PV power is expected to reach 80+ GW annually. To successfully achieve the goal of 80+ GW, barriers that hinder the further development of solar PV power have to be eliminated. Suggestions for policymakers include maintaining enforceability and continuity of policies, favorable financial supports, mandatory RE quotas for all parties, and supporting fundamental R&D. Suggestions for the solar PV industry include full utilization of integrated applications, set up an after-sales service network, collaborative innovation among the industry chain, and engaging in storage and hydrogen technology. The findings are greatly beneficial for policymakers and the solar PV industry.

scholarly journals Stand-Alone Direct Current Power Network Based on Photovoltaics and Lithium-Ion Batteries for Reverse Osmosis Desalination Plant

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2772
Author(s):  
Vishwas Powar ◽  
Rajendra Singh
Keyword(s):  
Reverse Osmosis ◽  
Direct Current ◽  
Cyber Security ◽  
Large Scale ◽  
Lithium Ion ◽  
Economic Feasibility ◽  
Power Network ◽  
Variable Effect ◽  
Desalination Plant ◽  
Reverse Osmosis Desalination

Plummeting reserves and increasing demand of freshwater resources have culminated into a global water crisis. Desalination is a potential solution to mitigate the freshwater shortage. However, the process of desalination is expensive and energy-intensive. Due to the water-energy-climate nexus, there is an urgent need to provide sustainable low-cost electrical power for desalination that has the lowest impact on climate and related ecosystem challenges. For a large-scale reverse osmosis desalination plant, we have proposed the design and analysis of a photovoltaics and battery-based stand-alone direct current power network. The design methodology focusses on appropriate sizing, optimum tilt and temperature compensation techniques based on 10 years of irradiation data for the Carlsbad Desalination Plant in California, USA. A decision-tree approach is employed for ensuring hourly load-generation balance. The power flow analysis evaluates self-sufficient generation even during cloud cover contingencies. The primary goal of the proposed system is to maximize the utilization of generated photovoltaic power and battery energy storage with minimal conversions and transmission losses. The direct current based topology includes high-voltage transmission, on-the-spot local inversion, situational awareness and cyber security features. Lastly, economic feasibility of the proposed system is carried out for a plant lifetime of 30 years. The variable effect of utility-scale battery storage costs for 16–18 h of operation is studied. Our results show that the proposed design will provide low electricity costs ranging from 3.79 to 6.43 ¢/kWh depending on the debt rate. Without employing the concept of baseload electric power, photovoltaics and battery-based direct current power networks for large-scale desalination plants can achieve tremendous energy savings and cost reduction with negligible carbon footprint, thereby providing affordable water for all.

scholarly journals Techno-economic feasibility analysis of a 3-kW PV system installation in Nepal

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ramhari Poudyal ◽  
Pavel Loskot ◽  
Ranjan Parajuli
Keyword(s):  
Net Present Value ◽  
Meteorological Data ◽  
Electric Energy ◽  
Simulation Software ◽  
Economic Feasibility ◽  
Performance Ratio ◽  
Energy Output ◽  
Solar Pv ◽  
Economic Returns ◽  
Pv System

AbstractThis study investigates the techno-economic feasibility of installing a 3-kilowatt-peak (kWp) photovoltaic (PV) system in Kathmandu, Nepal. The study also analyses the importance of scaling up the share of solar energy to contribute to the country's overall energy generation mix. The technical viability of the designed PV system is assessed using PVsyst and Meteonorm simulation software. The performance indicators adopted in our study are the electric energy output, performance ratio, and the economic returns including the levelised cost and the net present value of energy production. The key parameters used in simulations are site-specific meteorological data, solar irradiance, PV capacity factor, and the price of electricity. The achieved PV system efficiency and the performance ratio are 17% and 84%, respectively. The demand–supply gap has been estimated assuming the load profile of a typical household in Kathmandu under the enhanced use of electric appliances. Our results show that the 3-kWp PV system can generate 100% of electricity consumed by a typical residential household in Kathmandu. The calculated levelised cost of energy for the PV system considered is 0.06 $/kWh, and the corresponding rate of investment is 87%. The payback period is estimated to be 8.6 years. The installation of the designed solar PV system could save 10.33 tons of CO2 emission over its lifetime. Overall, the PV systems with 3 kWp capacity appear to be a viable solution to secure a sufficient amount of electricity for most households in Kathmandu city.

Operation of a fully renewable electric energy system with CSP plants

2014 ◽  
Vol 119 ◽  
pp. 417-430 ◽  
Author(s):  
R. Domínguez ◽  
A.J. Conejo ◽  
M. Carrión
Keyword(s):  
Electric Energy ◽  
Energy System

SUBSTANTIATION OF STRATEGIES OF DIVERSIFICATION OF ACTIVITY OF MOTOR TRANSPORT ENTERPRISE AND THEIR EXPERIMENTAL VERIFICATION

2018 ◽  
Author(s):  
Oleksii Omelyanovych ◽  
◽  
Fedir Demishkan ◽  
Keyword(s):  
Economic System ◽  
Synergistic Effects ◽  
Production Capacity ◽  
Economic Conditions ◽  
Market Segments ◽  
Industrial Diversification ◽  
Diversification Strategies ◽  
Different Types ◽  
Trucking Company ◽  
Further Development

The study considered the main approaches to the concept of diversification. It was determined that there are different types of diversification depending on the sources of its origin, but the main groups of classification are: functional (by processes), commercial and resource. In general, the economic system can have four typical situations when a process of diversification (specialization) occurs: 1) specialization is more profitable than the possible option of diversification; 2) specialization is the only possible way of further development and existence for this economic system in specific economic conditions; 3) diversification is more profitable than specialization; 4) diversification is the only possible way of further existence and development. Diversification is especially important in conditions of uncertainty in the development of the external environment. In such situations, diversification is the only way to avoid collapse and achieve sustainable development. The firm makes several bets in the hope that at least one of them will win. Offensive motives include aggressive growth policies; financial opportunities; overcoming the limits of growth; achieving synergistic effects. Here it is necessary to determine the presence of defense motives for the use of diversification: the distribution of business risk; reduction of cyclical instability; replacement of the declining activity. In accordance with the objectives of the study for the trucking company, it is possible to propose the use of such diversification strategies as industrial diversification, which is realized through changes in the production capacity of the trucking company; marketing diversification, which will promote the positioning of the relocation service in different market segments, and competitive diversification, which should be carried out using the methods of portfolio analysis of the company's positioning in the market.

scholarly journals Locomotive operation mode - the basis for developing the requirements for the energy storage device on railway transport

2018 ◽  
Vol 239 ◽  
pp. 01004
Author(s):  
Andrey Shatokhin ◽  
Alexandr Galkin
Keyword(s):  
Energy Storage ◽  
Direct Current ◽  
Electric Energy ◽  
Rolling Stock ◽  
Storage Device ◽  
Contact Network ◽  
Energy Storage Device ◽  
Electric Energy Storage ◽  
Operation Modes ◽  
Electric Rolling Stock

Increasing the efficiency of cargo transportation by rail is not only one of the main directions of the company JSC “Russian Railways” but also one of the main tasks of our country in order to achieve sustainable economic growth. Electric rolling stock is the largest consumer of electric energy in the company, that’s why its effective and failure-free operation is the way to solve the set tasks. The paper deals with studies related to the operation modes of a freight electric rolling stock of direct current for the purpose of determining the requirements for electric energy storage device, since it is the electric rolling stock that determines the daily schedule of electric load. The order of the analysis of experimental trips of freight electric locomotives of a direct current on the basis of cartridges of recorders of traffic parameters installed on the locomotive is determined. On the basis of the analysis of conducted trips, the main requirements for the energy storage device were obtained with a single running of electric DC rolling stock, namely the average duration of the operation modes of the electric locomotive, the maximum, minimum, and average values of voltage and current, the average value of the electric energy returned to the contact network, time of charge/discharge, and the useful energy intensity of the electric energy storage device. The studies were carried out with the support of the Russian Foundation for Basic Research for the project No 17-20-01148 ofi_m_RZD/17.

scholarly journals Optimal design and economic feasibility of rooftop photovoltaic energy system for Assuit University, Egypt

2021 ◽  
Author(s):  
Hilmy Awad ◽  
Yasser Fathi Nassar ◽  
Ahmed Hafez ◽  
Mohamed K. Sherbiny ◽  
Alaa.F.M Ali
Keyword(s):  
Optimal Design ◽  
Energy System ◽  
Economic Feasibility ◽  
Photovoltaic Energy
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