scholarly journals Prospects of Storage and Pumped-Storage Hydropower for Enhancing Integrated Nepal Power Systems

2014 ◽  
Vol 15 ◽  
pp. 37-41 ◽  
Author(s):  
Neeraj Kumar Sah ◽  
Madhab Uprety ◽  
Sangharsha Bhandari ◽  
Prativa Kharel ◽  
Saurav Suman ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Plants ◽  
Peak Load ◽  
Electrical Energy ◽  
Hydropower Plant ◽  
Hydropower Plants ◽  
Pumped Storage ◽  
Electrical Demand ◽  
Installed Capacity

An Integrated Power System (IPS) should have electrical energy generating plants for base load (e.g., nuclear and thermal plants) and peak load (e.g., hydropower plants) so that they can work in coordination in such a way that the demand is met in time. In Nepal, the Integrated Nepal Power System (INPS) is a hydro-dominated system where the base and intermediate power demands are covered primarily by run-of-river hydropower plants and the peak demand by seasonal storage and several diesel power plants of lower capacity. The INPS should have sufficient natural storage and forced storage power plants to improve the system’s reliability. On top of that, daily peak electrical demand could also be adequately covered by demand-side management, using a pumped-storage hydropower plant that can employ a system’s surplus energy during low demand period for pumping. To rectify this extreme imbalance of installed capacity in Nepal, this paper explores the prospect of storage and pumped-storage power plants for enhancing INPS. A case study of Rupa-Begnas pumped-storage hydropower is highlighted for these purposes.DOI: http://dx.doi.org/10.3126/hn.v15i0.11290HYDRO Nepal JournalJournal of Water, Energy and EnvironmentVolume: 15, 2014, JulyPage: 37-41 

3. Biomass, solar heat, and hydropower

2020 ◽  
pp. 30-46
Author(s):  
Nick Jelley
Keyword(s):  
Power Plants ◽  
Solar Power ◽  
Low Cost ◽  
Electrical Energy ◽  
Hydropower Plant ◽  
Low Carbon ◽  
Concentrated Solar Power ◽  
Solar Heat ◽  
Hydropower Plants ◽  
Pumped Storage

‘Biomass, solar heat, and hydropower’ discusses three forms of renewable energy: biomass, solar heat, and hydropower. Biomass and biofuels provide energy via heat generation and food consumption. But with the rising global population, land resources are being drastically depleted, and using biomass for energy can clash with growing plants for food, and cause serious home air pollution. Solar heating for homes and industry is facing competition from electrically driven systems, but the chapter shows that the outlook for concentrated solar power is encouraging, as its cost is falling, and the availability of supply after sunset offered by concentrated solar power plants with thermal storage can be a significant advantage over solar photovoltaic farms. In a hydropower plant, the energy in water falling from a height is converted to electrical energy using a turbine. Although hydropower plants can provide large amounts of low-cost, low-carbon electricity, and provide useful energy storage through pumped storage plants, serious social and environmental issues need to be considered when deciding whether the construction of a new hydroelectric scheme is appropriate.

scholarly journals Short–Term Planning of Hybrid Power System

2016 ◽  
Vol 67 (4) ◽  
pp. 234-245 ◽  
Author(s):  
Goran Knežević ◽  
Zoran Baus ◽  
Srete Nikolovski
Keyword(s):  
Power System ◽  
Power Plants ◽  
Thermal Power ◽  
Optimization Process ◽  
Thermal Power Plants ◽  
Short Term ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Hydropower Plants ◽  
Pumped Storage

Abstract In this paper short-term planning algorithm for hybrid power system consist of different types of cascade hydropower plants (run-of-the river, pumped storage, conventional), thermal power plants (coal-fired power plants, combined cycle gas-fired power plants) and wind farms is presented. The optimization process provides a joint bid of the hybrid system, and thus making the operation schedule of hydro and thermal power plants, the operation condition of pumped-storage hydropower plants with the aim of maximizing profits on day ahead market, according to expected hourly electricity prices, the expected local water inflow in certain hydropower plants, and the expected production of electrical energy from the wind farm, taking into account previously contracted bilateral agreement for electricity generation. Optimization process is formulated as hourly-discretized mixed integer linear optimization problem. Optimization model is applied on the case study in order to show general features of the developed model.

scholarly journals TECHNICAL AND ECONOMIC ASPECTS OF DECARBONISATION PROSPECTS ASSESSING OF THE INTERCONNECTED POWER SYSTEM OF UKRAINE

2021 ◽  
Vol 2021 (5) ◽  
pp. 55-62
Author(s):  
B.I. Basok ◽  
◽  
O.F. Butkevych ◽  
S.V. Dubovskyi ◽  
◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Nuclear Power ◽  
Power Plants ◽  
System Capacity ◽  
Operational Conditions ◽  
Interconnected Power System ◽  
Net Zero ◽  
Installed Capacity ◽  
The Mathematical Model

Shot analysis of power systems decarbonisation problem to ensure a net-zero greenhouse gas emissions is given. The mathematical model of the power system capacity balancing, generating capacities of which are renewables and nuclear power plants (NPP) is proposed. For capacity balancing storage power plants (SPP) with specified efficiency indicators are used. By using the indicators of the operational conditions of the IPS of Ukraine in 2019 and mathematical modeling for various options of the NPP installed capacity in the decarbonised IPS of Ukraine, the needs in the renewables installed capacity and in the capacity and energy of various types of the SPP were estimated. References 10, figures 4, tables 2.

scholarly journals Problems of using pumped storage power plants to improve the reliability and controllability of electric power system of the republic of Uzbekistan

2019 ◽  
Vol 139 ◽  
pp. 01009
Author(s):  
Murodilla Mukhammadiev ◽  
Boborakhim Urishev ◽  
Shirin Esemuratova ◽  
Nigina Djumaniyozova
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Power Plants ◽  
Electric Power Systems ◽  
Electric Power System ◽  
The Republic ◽  
Pumped Storage

This article deals with the analysis and development perspectives of the use pumped storage power plants use to increase the reliability and regime controllability of electric power systems of the Republic of Uzbekistan.

scholarly journals METODE LOGIKA FUZZY SEBAGAI EVALUASI DISTRIBUSI DAYA LISTRIK BERDASARKAN BEBAN PUNCAK PEMBANGKIT TENAGA LISTRIK

2016 ◽  
Vol 2 (1) ◽  
pp. 22
Author(s):  
Fifi D. Rosalina ◽  
Yuniar Farida ◽  
Abdulloh Hamid
Keyword(s):  
Power System ◽  
Peak Load ◽  
Electrical Energy ◽  
Power Capacity ◽  
Reliability Level ◽  
Peak Loads ◽  
Testing Data ◽  
Fuzzy Logic Method ◽  
Installed Capacity ◽  
The Membership Function

Evaluation of peak load on the power system is raised very influential on the development of electric power availability in the various provinces. By reviewing the peak load for a year, can be implemented for the evaluation of power generation as a simulation of the electrical energy supply for the future. Evaluating the peak load also depends on several factors such as installed capacity, power capacity, and production at some plants systems. It can be the control of the forces generated on each such PLTA, PLTU, PLTG, and PLTS. Fuzzy logic method is an effective method that can be applied to evaluate peak loads with high accuracy. Thus the fulfillment of the electricity will be met with the desired reliability level. The evaluation of the resulting output can be used as a control for the security of the power system. With the results obtained is the highest error rate reached 60%, and has done training and testing data is as much as 4x to test the parameters of the membership function has been determined by the highest recognize result of 12.5%

scholarly journals How green can Amazon hydropower be? Net carbon emission from the largest hydropower plant in Amazonia

2021 ◽  
Vol 7 (26) ◽  
pp. eabe1470
Author(s):  
Dailson J. Bertassoli ◽  
Henrique O. Sawakuchi ◽  
Kleiton R. de Araújo ◽  
Marcelo G. P. de Camargo ◽  
Victor A. T. Alem ◽  
...  
Keyword(s):  
Power Plants ◽  
Ghg Emissions ◽  
Leading Edge ◽  
Hydropower Plant ◽  
Carbon Footprints ◽  
Hydropower Plants ◽  
Tropical Areas ◽  
Reservoir Type ◽  
Installed Capacity ◽  
Belo Monte

The current resurgence of hydropower expansion toward tropical areas has been largely based on run-of-the-river (ROR) dams, which are claimed to have lower environmental impacts due to their smaller reservoirs. The Belo Monte dam was built in Eastern Amazonia and holds the largest installed capacity among ROR power plants worldwide. Here, we show that postdamming greenhouse gas (GHG) emissions in the Belo Monte area are up to three times higher than preimpoundment fluxes and equivalent to about 15 to 55 kg CO2eq MWh−1. Since per-area emissions in Amazonian reservoirs are significantly higher than global averages, reducing flooded areas and prioritizing the power density of hydropower plants seem to effectively reduce their carbon footprints. Nevertheless, total GHG emissions are substantial even from this leading-edge ROR power plant. This argues in favor of avoiding hydropower expansion in Amazonia regardless of the reservoir type.

scholarly journals Dual Frequency Regulation in Pumping Mode in a Wind–Hydro Isolated System

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2865 ◽  
Author(s):  
José Sarasúa ◽  
Guillermo Martínez-Lucas ◽  
Carlos Platero ◽  
José Sánchez-Fernández
Keyword(s):  
Power Systems ◽  
Power System ◽  
Frequency Control ◽  
Hydropower Plant ◽  
Frequency Regulation ◽  
Variable Speed ◽  
Dual Frequency ◽  
Pump Station ◽  
Control Scheme ◽  
Pumped Storage

Frequency control is one of the most critical tasks in isolated power systems, especially in high renewable penetration scenarios. This paper presents a new hydropower pumped-storage dual control strategy that combines variable-speed-driven pumps and fixed-speed-driven pumps. A possible case for implementation of such a control scheme is described based on El Hierro Island’s power system. This isolated power system consists of a hybrid wind pumped-storage hydropower plant and diesel generators. The pumped-storage power plant is divided into a hydropower plant equipped with four Pelton turbines and a pump station equipped with both fixed- and variable-speed pumps. According to the proposed control scheme, frequency regulation will be provided by a dual controller: a continuous controller for the variable-speed pumps and a discrete controller for the fixed-speed pumps. The Pelton units, which operate as synchronous condensers, also supply the power system inertia. Therefore, diesel units may be disconnected, decreasing generation costs and greenhouse gas emissions. Owing to the combination of both controllers and the inertia of the Pelton units, an acceptable frequency regulation can be achieved. This technique has been validated through computer simulations.

scholarly journals The Challenges and Opportunities of Renewable Energy Source (RES) Penetration in Indonesia: Case Study of Java-Bali Power System

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5903 ◽  
Author(s):  
Handrea Bernando Tambunan ◽  
Dzikri Firmansyah Hakam ◽  
Iswan Prahastono ◽  
Anita Pharmatrisanti ◽  
Andreas Putro Purnomoadi ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Power System ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Peak Load ◽  
Rate Capability ◽  
Thermal Power Plants ◽  
Pv Penetration

Nowadays, the integration of renewable energy sources, especially grid-connected photovoltaic, into electrical power systems, is increasing dramatically. There are several stimulants especially in the Java-Bali power system, including huge solar potential, a national renewable energy (RE) target, regulation support for prosumers, photovoltaic technology development, and multi-year power system planning. However, significant annual photovoltaic penetration can lead to critical issues, including a drop of netload during the day, ramping capability, and minimal load operation for thermal power plants. This study analyses the duck curve phenomenon in the Java-Bali power system that considers high shares of the baseload power plant and specific scenarios in photovoltaic (PV) penetration and electricity demand growth. This study also analyses future netload, need for fast ramping rate capability, and oversupply issues in the Java-Bali power system. The results showed that the duck curve phenomenon appears with a significant netload drop in the middle of the day because of high power generation from grid-connected PV. Furthermore, the need for fast ramp rate capability is critical for a higher peak load combined with the lowest netload valley. Moreover, the significant load growth with high grid-connected PV penetration level caused unit commitment issues for thermal power plants as baseload operators.

scholarly journals Development of a Hydropower Turbine Using Seawater from a Fish Farm

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 266
Author(s):  
Md Rakibuzzaman ◽  
Sang-Ho Suh ◽  
Hyoung-Ho Kim ◽  
Youngtae Ryu ◽  
Kyung Yup Kim
Keyword(s):  
Power Plants ◽  
Guide Vane ◽  
Cross Flow ◽  
Synchronous Generator ◽  
Fish Farm ◽  
Hydropower Plant ◽  
Fish Farms ◽  
Data Simulation ◽  
Small Hydropower ◽  
Hydropower Plants

Discharge water from fish farms is a clean, renewable, and abundant energy source that has been used to obtain renewable energy via small hydropower plants. Small hydropower plants may be installed at offshore fish farms where suitable water is obtained throughout the year. It is necessary to meet the challenges of developing small hydropower systems, including sustainability and turbine efficiency. The main objective of this study was to investigate the possibility of constructing a small hydropower plant and develop 100 kW class propeller-type turbines in a fish farm with a permanent magnet synchronous generator (PMSG). The turbine was optimized using a computer simulation, and an experiment was conducted to obtain performance data. Simulation results were then validated with experimental results. Results revealed that streamlining the designed shape of the guide vane reduced the flow separation and improved the efficiency of the turbine. Optimizing the shape of the runner vane decreased the flow rate, reducing the water power and increasing the efficiency by about 5.57%. Also, results revealed that tubular or cross-flow turbines could be suitable for use in fish farm power plants, and the generator used should be waterproofed to avoid exposure to seawater.

scholarly journals Wind integrated power system to reduce emission: An application of Bat algorithm

2021 ◽  
pp. 1-9 ◽  
Author(s):  
B. Venkateswara Rao ◽  
Ramesh Devarapalli ◽  
H. Malik ◽  
Sravana Kumar Bali ◽  
Fausto Pedro García Márquez ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Plants ◽  
Optimal Parameter ◽  
Electrical Power ◽  
Bat Algorithm ◽  
Voltage Profile ◽  
Electrical Power Systems ◽  
Generation Cost ◽  
Automation Technology

The trend of increasing demand creates a gap between generation and load in the field of electrical power systems. This is one of the significant problems for the science, where it require to add new generating units or use of novel automation technology for the better utilization of the existing generating units. The automation technology highly recommends the use of speedy and effective algorithms in optimal parameter adjustment for the system components. So newly developed nature inspired Bat Algorithm (BA) applied to discover the control parameters. In this scenario, this paper considers the minimization of real power generation cost with emission as an objective. Further, to improve the power system performance and reduction in the emission, two of the thermal plants were replaced with wind power plants. In addition, to boost the voltage profile, Static VAR Compensator (SVC) has been integrated. The proposed case study, i.e., considering wind plant and SVC with BA, is applied on the IEEE30 bus system. Due to the incorporation of wind plants into the system, the emission output is reduced, and with the application of SVC voltage profile improved.

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