The Georgian Power System Hydro Power Plants Install Capacity Review

2021 ◽  
Author(s):  
Alexander Egorov ◽  
Olga Pichugova
Keyword(s):  
Power System ◽  
Power Plants ◽  
Hydro Power ◽  
Hydro Power Plants

scholarly journals Hydro Power Plants in the Interconnected Power System of Siberia: Trends and Problems

2020 ◽  
Vol 209 ◽  
pp. 05019
Author(s):  
V.M. Nikitin ◽  
E.N. Malinovskaya
Keyword(s):  
Power System ◽  
Power Plants ◽  
Current System ◽  
Strong Dependence ◽  
Hydro Power ◽  
Interconnected Power System ◽  
Design Values ◽  
Hydro Power Plants ◽  
Efficiency And Reliability

The paper discusses the trends, features, and current problems of the operation of hydro power plants in the interconnected power system (IPS) of Siberia. The main feature of the IPS of Siberia is a high proportion of hydro power plants and, as a result, a strong dependence of power generation on the natural fluctuations of water inflows into reservoirs. The problems affecting the power system efficiency arise when the inflows deviate from normal and close-to-normal values. The study indicates the need to improve the current system of managing and planning the operation of hydro power plants. The important factor that can increase the efficiency and reliability of the power system operation is bringing the permissible ranges of variations in reservoir levels in compliance with the design values. Planning the long-term power balances and increasing their validity should involve predictive scenarios of water inflows into reservoirs.

Hydro power plants operating modes in a cascade system depending on the needs of the power system

2020 ◽  
Vol 22 (1-2) ◽  
pp. 153-159
Author(s):  
Sofija Nikolova Poceva ◽  
◽  
Anton Chaushevski ◽  
Valentino Stojkovski ◽  
Zoran Markov ◽  
...  
Keyword(s):  
Power System ◽  
Electricity Market ◽  
Power Plants ◽  
Market Price ◽  
Cascade System ◽  
Time Duration ◽  
Hydro Power ◽  
Hydrological Conditions ◽  
Operating Modes ◽  
Hydro Power Plants

The paper presents the methodology for hydro power plants operation (Long-term and Short-term) in a hydro power cascade system. It includes water managing of generating and/or pumping units taking into accounts technical characteristics of the power plants facilities (turbine/generator and pump/motor systems), reservoirs characteristics considering all hydraulically connected infrastructures which are, as well as the hydrological conditions (for run offs and turbine inflows). The goal of the operation for all hydropower system is to have maximum profit from electricity production taking into account electricity market environment, power system requirements, as well as satisfying technical conditions and at the same time avoiding water spilling as it is maximum possible. Operating modes of the hydro power plants depend on electricity market price, tariff prices and time duration of each tariff (base, peak, and rush hour), technical characteristics of the unit(s), hydro technical conditions, water reservoir’s volumes, run off and others. The application of the model is presented with the results on real hydro power systems consist of different hydraulic connections in various cases depend on hydrological conditions and requirements. The model can be used to make preliminary analysis for additional improvement of hydro systems as having the results for additional installed power of the existing system. The selected output results are presented with appropriated comparing and at the end with conclusion remarks.

ESTIMATION OF REDUCTION OF NITROGEN OXIDES IN COMBINED STEAM AND GAS POWER PLANTS

2018 ◽  
pp. 226-236
Author(s):  
M. P. Kulyk
Keyword(s):  
Power Plant ◽  
Power System ◽  
Power Plants ◽  
Membrane Separation ◽  
Thermal Power ◽  
Gas Generation ◽  
Hydro Power ◽  
Atmospheric Air ◽  
Power Change ◽  
Hydro Power Plants

The characteristic of the united power system of Ukraine, based on thermal, nuclear and hydro power plants, as well as on alternative and renewable sources, is carried out. The structure of power system potential indicates a lack of maneuver capacity, some plants are of low mobility. Thermal power is in critical condition due to expired service time of the main technological equipment, additionally, it is a huge source of emissions of harmful substances into the environment. An attempt to use them to cover peak loads only worsens their critical state.It is suggested to restore thermal power on the basis of combined steam and gas power plants. Moreover, for operation of gas section it is necessary to use working substance, which is formed in an additional furnace by heating the compressed air with heat from combustion of some part of coal flow, which subsequently enters the main furnace. The steam and gas generation branches are parallel connected, which extends the range of power change (increasing its maneuverability.) Gas generation increases mobility (rate of power change). For combustion of organic fuel, oxygen enriched atmospheric air is fed, and a nitrogen-based fraction can form a working substance for gas generation. With such an organization of combustion the coefficient of excess air can be ignored, which enables to reduce the volume of flue gases. The membrane separation of atmospheric air into fractions - one en-riched with oxygen, and another with nitrogen, improves the environmentalperformance of a power plant, while increasing its power and economic indices. On the example of the boiler unit TP-92 the basic parameters of a power plant are checked by a calculation method. It is confirmed that the proposed technical solutions point to the correctness and validity of the assumptions. Analysis of the existing technical level of scientific research increases confidence in perspective of the selected direction.

scholarly journals Open Source Modelling and Simulation of the Nordic Hydro Power System

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1425
Author(s):  
Iasonas Kouveliotis-Lysikatos ◽  
Angelica Waernlund ◽  
Manuel Marin ◽  
Mikael Amelin ◽  
Lennart Söder
Keyword(s):  
Power System ◽  
Open Source ◽  
Electricity Market ◽  
Power Plants ◽  
Source Model ◽  
Modelling And Simulation ◽  
Hydro Power ◽  
Nordic Region ◽  
Simulation Engine ◽  
Hydro Power Plants

In this paper, we present the results from the development and the simulation of a hydro power model for Sweden and Norway, using SpineOpt software and openly available data. We employ (i) hydrological and market data from the Nordic region and (ii) the abstract representation of the multi-vector modelling and simulation engine SpineOpt, to compile an open-source model of a large portion of the hydro power plants of the Nordic region, for conducting realistic hydro power generation studies. We place the hydro power system operation within the structuring of the Nordic electricity market and study the effect that different objectives have on the operational results. By employing the SpineOpt functionalities for automating the transformation of the temporal resolution of the model, we explore the trade-of between its computational burden and accuracy.

scholarly journals EFFECTS OF WIND FARM OPERATING REGIMES IN THE POWER SYSTEM OF MACEDONIA

2017 ◽  
Vol 32 (1-2) ◽  
Author(s):  
Anton Čauševski ◽  
Tome Boševski
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Wind Power ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Operating Mode ◽  
Hydro Power ◽  
Wind Power Plants ◽  
Hydro Power Plants

A b s t r a c t: The trend for achieving sustainable energy development, keeping the environment clean and utilization of renewable energy sources are imperative to the energy development in several countries. Through legislation and economical benefits, countries tend to encourage potential investors for building the technologies for energy production from renewable. In order to achieve the EU energy target to have 20% renewable in 2020, the technologies for producing electricity from renewable energy sources (RES) are used to cover the needs with more intensities. The most dominant renewable is the wind power plants(WPP) or wind parks, which are used to supply electricity to more power systems (EPS) and whose installed capacity in some European countries reaches thousands MW. This paper treats the issue of operational work of wind power in the power system of Macedonia. It is made of simulation work with wind power plants with total installed capacity of 150 MW with an annual production of 300 GWh. The considered power system of Macedonia is projected for the period of 2015 with an annual consumption of 10,000 GWh. The power plants considering operating in the simulated period are the existing thermal power units and hydro power plants together with the planned gas power plants and hydro power plants. The aim of this paper is to analyze the effects of the power system operation in case to have installed wind power plants, or what operation mode of thermal power plants (TPP) and hydro power plants (HPP) is most convenient when the system has a source of technology from the renewable with stochastically nature. This is especially important, because conventional power plants (TPP and HPP) operate and regulate the needs of consumption in the power system, but the wind power plants operate when the wind occurs within certain limits of  technical operating mode for wind turbines. Although wind is free renewable energy source, frequency of occurrence of wind with unpredictable nature and stochastically, has additional adverse impact in terms of power system operating mode. Certainly the impact of wind power on the overall the power system operation depends on power plants and configuration of the power system. In other words, the base load is covered from TPP fossil fuel or nuclear plants, and the dynamic nature of wind power can be incorporated in the power system depends on how much power plants for peak load are available in the system (storage reversible hydro or gas turbines), or how variable power can be accepted in the power system.

scholarly journals Development of Long-Term Forecast Energy Balances in the Power System of Siberia

2021 ◽  
Vol 289 ◽  
pp. 01008
Author(s):  
Elena Malinovskaya
Keyword(s):  
Power System ◽  
Power Plants ◽  
Strong Dependence ◽  
Energy System ◽  
Hydro Power ◽  
Interconnected Power System ◽  
Term Energy ◽  
Hydro Power Plants ◽  
Energy Balances

The article discusses the features of the development of long-term energy balances in the interconnected power system of Siberia (IPS). The main feature of the IPS of Siberia is a high proportion of hydro power plants and, as a result, a strong dependence of electricity generation on natural fluctuations in water inflow into reservoirs. In the power output of the HPPs of the Angara-Yenisei cascade, depending on the water availability conditions, the deviation from the long-term average values can be up to 30% or 31 ÷ 36 billion kWh per year. The development of long-term energy balances and an increase in the efficiency of the operation modes of the HPPs of the Angara-Yenisei cascade makes it possible to identify in advance possible risks in the operation of the water management system of the Angara-Yenisei basin and the unified energy system of Siberia, thereby ensuring a more balanced operation of the power system as a whole.

scholarly journals Effect of Symmetrically Switched Rectifier Topologies on the Frequency Regulation of Standalone Micro-Hydro Power Plants

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3201
Author(s):  
Henry Bory ◽  
Jose L. Martin ◽  
Iñigo Martinez de Alegria ◽  
Luis Vazquez
Keyword(s):  
Power Factor ◽  
Power Plants ◽  
Reactive Power ◽  
Alternating Current ◽  
Frequency Regulation ◽  
Hydro Power ◽  
Major Energy Source ◽  
Hydro Power Plants ◽  
Electronic Load ◽  
Ac Converters

Micro-hydro power plants (μHPPs) are a major energy source in grid-isolated zones because they do not require reservoirs and dams to be built. μHPPs operate in a standalone mode, but a continuously varying load generates voltage unbalances and frequency fluctuations which can cause long-term damage to plant components. One method of frequency regulation is the use of alternating current-alternating current (AC-AC) converters as an electronic load controller (ELC). The disadvantage of AC-AC converters is reactive power consumption with the associated decrease in both the power factor and the capacity of the alternator to deliver current. To avoid this disadvantage, we proposed two rectifier topologies combined with symmetrical switching. However, the performance of the frequency regulation loop with each topology remains unknown. Therefore, the objective of this work was to evaluate the performance of the frequency regulation loop when each topology, with a symmetrical switching form, was inserted. A MATLAB® model was implemented to simulate the frequency loop. The results from a μHPP case study in a small Cuban rural community called ‘Los Gallegos’ showed that the performance of the frequency regulation loop using the proposed topologies satisfied the standard frequency regulation and increased both the power factor and current delivery capabilities of the alternator.

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