scholarly journals PGU-450 network heaters modes modelling with CCGT participation in regulating the electrical load in the heating mode

2021 ◽  
Vol 2090 (1) ◽  
pp. 012014
Author(s):  
E K Arakelyan ◽  
A V Andryushin ◽  
S V Mezin ◽  
Y Y Yagupova
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Mathematical Optimization ◽  
Optimization Methods ◽  
Information Support ◽  
Heat Output ◽  
Complex Composition ◽  
Operating Modes ◽  
Capacity Market ◽  
Distribution Algorithms

Abstract The features of a mathematical model for optimizing the distribution of heat and electricity at a large thermal power plant with a complex composition of equipment as part of traditional heating units and a heating CCGT are considered. The selection and justification of optimization criteria at different stages of preparation and entry of the station to the electricity and capacity market is given. The disadvantages of the previously proposed optimal distribution algorithms are analyzed in relation to thermal power plants with a complex composition of equipment and with a complex scheme for the supply of electricity and heat. A method and algorithm for solving the problem are proposed based on the equivalence of the CHP equipment and the decomposition of the problem taking into account the schemes of electricity and heat output. The description of mathematical optimization methods is given, taking into account the peculiarities of the CCGT operating modes at reduced loads. The requirements for information support when integrating the developed algorithm into the application software of the automated process control system based on the PTC are given.

scholarly journals Methodological Bases of Optimal Load Distribution at a Thermal Power Plant with a Complex Composition of Equipment, Taking into Account Market Requirements

2021 ◽  
Vol 2090 (1) ◽  
pp. 012013
Author(s):  
E K Arakelyan ◽  
A V Andryushin ◽  
Y Y Yagupova ◽  
A V Neklyudov ◽  
S V Mezin
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Mathematical Optimization ◽  
Optimization Methods ◽  
Information Support ◽  
Heat Output ◽  
Complex Composition ◽  
Operating Modes

Abstract The features of a mathematical model for optimizing the distribution of heat and electricity at a large thermal power plant with a complex composition of equipment as part of traditional heating units and a heating CCGT are considered. The selection and justification of optimization criteria at different stages of preparation and entry of the station to the electricity and capacity market is given. The disadvantages of the previously proposed optimal distribution algorithms are analyzed in relation to thermal power plants with a complex composition of equipment and with a complex scheme for the supply of electricity and heat. A method and algorithm for solving the problem are proposed based on the equivalence of the CHP equipment and the decomposition of the problem taking into account the schemes of electricity and heat output. The description of mathematical optimization methods is given, taking into account the peculiarities of the CCGT operating modes at reduced loads. The requirements for information support when integrating the developed algorithm into the application software of the automated process control system based on the PTC are given.

scholarly journals Exergoeconomic optimization of a thermal power plant using particle swarm optimization

2013 ◽  
Vol 17 (2) ◽  
pp. 509-524 ◽  
Author(s):  
Axel Groniewsky
Keyword(s):  
Power Plant ◽  
Energy Conversion ◽  
Power Plants ◽  
Optimization Problems ◽  
State Of The Art ◽  
Search Algorithm ◽  
Thermal Power ◽  
Optimization Methods ◽  
Conversion System ◽  
Energy Conversion System

The basic concept in applying numerical optimization methods for power plants optimization problems is to combine a State of the art search algorithm with a powerful, power plant simulation program to optimize the energy conversion system from both economic and thermodynamic viewpoints. Improving the energy conversion system by optimizing the design and operation and studying interactions among plant components requires the investigation of a large number of possible design and operational alternatives. State of the art search algorithms can assist in the development of cost-effective power plant concepts. The aim of this paper is to present how nature-inspired swarm intelligence (especially PSO) can be applied in the field of power plant optimization and how to find solutions for the problems arising and also to apply exergoeconomic optimization technics for thermal power plants.

scholarly journals Analysis of pricing mechanisms efficiency for modernization of thermal generationa

2019 ◽  
Vol 114 ◽  
pp. 01002
Author(s):  
Andrey Solyanik
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Market Price ◽  
Thermal Generation ◽  
Financial Model ◽  
Market Mechanisms ◽  
Investment Activity ◽  
Marginal Pricing ◽  
Capacity Market ◽  
Simulation Based

The article deals with pricing and investment consequences of using alternative ways to stimulate investment in thermal power plants (TPP) modernization. Calculations made with the use of our simulation-based financial model show that “pure” market mechanisms (such as the spot market and capacity market with marginal pricing) are not efficient enough in terms of keeping balance between robust investment signals and electricity prices produced. In this light, a flexible regulation of capacity market “price cap” is recommended, which should be derived from the assessment of the necessary revenue for operation and investment activity of thermal generation.

scholarly journals INTEGRATED ASSESSMENT OF ENVIRONMENTAL AND ECONOMIC EFFICIENCY OF GAS BOILER OPERATING MODES

2020 ◽  
Vol 4 (157) ◽  
pp. 127-133
Author(s):  
Y. Ponomarenko ◽  
M. Katkov ◽  
R. Semenenko
Keyword(s):  
Economic Efficiency ◽  
Power Plants ◽  
Thermal Power ◽  
Operating Mode ◽  
Operating Conditions ◽  
Technological Parameters ◽  
Boiler Load ◽  
Operating Modes ◽  
Steam Boilers ◽  
Time Changes

A thermal energy is one of the most significant sources of environmental impact.This is a consequence of both the use of mostly non-renewable natural resources and environmental pollution from thermal power plants. The intensity of this impact depends on many factors, namely the purpose, power, type of fuel used and operating mode. Existing studies have established links between emissions and characteristics such as power and fuel type for stationary operating conditions. At the same time, changes in operating conditions have a significant impact on environmental and economic characteristics. This article is devoted to establishing the relationship between the operational characteristics of gas boilers and their environmental and economic efficiency. The analysis was based on the field data obtained from steam and water boilers that are in commercial operation and uses the natural gas. It was found that for steam and water boilers, there is a well-conditioned non-linear relationship between the technological parameters of boiler operation, in particular gas consumption, the percentage of boiler load, the amount and temperature of flue gases with indicators of pollutants entering the atmosphere. The most significant factor affecting the environmental and economic characteristics of boilers is the percentage of load of boilers. The nature of the dependency is determined by the type of boiler and the setting mode. These dependences with a high degree of conditionality have a parabolic character, which makes it possible to assume the existence of adjustment modes that minimize environmental and economic costs. For steam and water boilers, the dependence of environmental impact on the percentage of load is direct. But for steam boilers in the range of data that were studied, it has a monotonous character, that is, it does not have an extremum point. For water boilers, it is possible to find the optimal loading level that minimizes environmental costs, but to confirm this assumption, additional research is needed at low boiler loading levels. The proposed method can be used to determine the operating modes of boilers and their settings, taking into account environmental and economic criteria. Keywords: water gas boilers, steam gas boilers, operating modes, environmental and economic characteristics.

scholarly journals Active power ouptut optimization for wind farms and thermal units by minimizing the operating cost and emissions

2020 ◽  
Vol 10 (4) ◽  
pp. 3412
Author(s):  
Nazha Cherkaoui ◽  
Abdelaziz Belfqih ◽  
Faissal El Mariami ◽  
Jamal Boukherouaa ◽  
Abdelmajid Berdai
Keyword(s):  
Objective Function ◽  
Power Plants ◽  
Fossil Fuels ◽  
Thermal Power ◽  
Economic Dispatch ◽  
Operating Cost ◽  
Wind Farms ◽  
Optimization Methods ◽  
Optimization Techniques ◽  
Grey Wolf Optimizer

In recent years, many works have been done in order to discuss economic dispatch in which wind farms are installed in electrical grids in addition to conventional power plants. Nevertheless, the emissions caused by fossil fuels have not been considered in most of the studies done before. In fact, thermal power plants produce important quantities of emissions for instance, carbon dioxide (CO2) and sulphur dioxide (SO2) that are harmful to the environment. This paper presents an optimization algorithm with the objective to minimize the emission levels and the production cost. A comparison of the results obtained with different optimization methods leads us to opt for the grey wolf optimizer technique (GWO) to use for solving the proposed objective function. First, the method used to estimate the wind power of a plant is presented. Second, the economic dispatch models for wind and thermal generators are presented followed by the emission dispatch model for the thermal units.Then, the proposed objective function is formulated. Finally, the simulation results obtained by applying the GWO and other known optimization techniques are analysed and compared.

scholarly journals Evaluation of the efficiency of cavitation-jet deaerator in condensate return systems of remote external consumers of thermal power plants

Vestnik IGEU ◽  
2019 ◽  
pp. 5-13
Author(s):  
Yu.E. Barochkin ◽  
A.Ya. Kopsov ◽  
G.V. Leduhovsky ◽  
S.I. Shuvalov
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Technical Solution ◽  
Thermal Power Plants ◽  
Superheated Water ◽  
Regulatory Requirements ◽  
Practical Applications ◽  
Capital Costs ◽  
Operating Modes ◽  
Nominal Capacity

Thermal power plants (TPPs) operate technological systems for the steam condensate return from remote external consumers. In such systems, it is necessary to protect the metal from corrosion. This will allow ful-filling the regulatory requirements for the concentration of iron compounds in the condensate entering the power plant. Such systems do not use thermal deaerators operated by using heating steam. The aim of the undertaken study is to assess the efficiency of superheated water deaerator use in such conditions, in par-ticular cavitation-jet deaerators. It means determining the effect of a new element of the system – the de-aerator – on the normalized chemical parameters of the returned condensate. A mathematical model of superheated water deaerators is used. The employed model is based on the theory of similarity of heat and mass transfer processes. The methodology for calculating the corrosion rate of return condensate pipelines was used, as well as experimental data on medium pressure TPPs. The efficiency of cavitation-jet deaerators in condensate return systems of external consumers has been estimated. A mathematical description of the system has been developed, which allows determining the required performance of deaerators and the required ratio of water recirculation through them in each mode. Recommendations for effective practical applications of the proposed technical solution have been developed considering the actual conditions at thermal power plants. It is advisable to install a deaerator according to the recirculation scheme through the condensate collection tank. This scheme, compared to a sequential scheme, enables to reduce capital costs and ensure that the deaerator operates in the highest efficiency mode. The choice of the nominal capacity of deaerators should be carried out taking into account the graphs of the change in the flow rate of incoming condensate and the concentration of dissolved oxygen in it during the day. In most operating modes of the system, it is possible to ensure compliance with the regulatory requirements for the mass concentration of corrosion products in the condensate returned to the TPP. The obtained results can be used in the design of new and improving the efficiency of existing TPPs that supply steam to external consumers.

scholarly journals Analytical studies on constrained particle settling velocity in a water suspension of fly ash from thermal power plants

2021 ◽  
pp. 32-38
Author(s):  
V. P. Nadutyi ◽  
V. S. Kurilov ◽  
O. G. Cholyshkina ◽  
V. F. Hankevych
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Power Plants ◽  
Thermal Power ◽  
Weak Turbulence ◽  
Analytical Evaluation ◽  
Counter Flow ◽  
Water Suspension ◽  
Operating Modes ◽  
Hydraulic Devices

Purpose. To establish analytical dependences for calculating the characteristics of the ash suspension and the velocity of constrained settling of coal and quartz depending on the particle size and density of the medium, which is necessary for calculating the design and determining the operating modes of hydraulic devices for extracting coal from water mineral suspension of fly ash from thermal power plants. Methodology. The research was carried out on the basis of a cellular suspension model and classical concepts of constrained particle motion in laminar and turbulent flow. For analytical evaluation of the characteristics of the suspension, the defining correlations and the Wend formula for viscosity were used. The Ergun equation and correlation analysis methods were used to calculate and analyze the speed of constrained movement of ash suspension particles. Findings. Approximating nonlinear functions are obtained for determining the speed of constrained movement of coal and quartz particle size up to 4 mm in an ash suspension with a density of 1.31.8 g/cm3. It is shown that, for both settling and ascending of coal, there is a direct relationship between the velocity and particle size, in both cases it is nonlinear. For any coal size, the speed of ascent depending on the suspension density is of extreme nature; the rational density range is 1.551.8 g/cm3 with a maximum of 1.65 g/cm3. The established dependencies allow us to determine the size of coal and quartz particles, taking into account the counter-flow of the liquid phase, as well as the boundary size. Originality. For the regime of weak-turbulence flows there were established dependences and approximation equations of the constrained movement speed of coal and quartz particles the main components of the water suspension of fly ash from the Novo-Kramatorska TPP, depending on the size and density of the ash suspensions with changes in the characteristics of the medium depending on density. The frames of the Stokes description of processes are established. It is shown that the movement of the liquid phase in a counter-flow with precipitating particles is effective for surfacing of thin coal classes. Practical value. The described approach can be used for analytical evaluation of the characteristics and velocity of constrained movement in various water suspensions of discrete solid particles in weak-turbulence flows. The advantage is a wider coverage of hydraulic equipment operating modes. The results obtained are necessary for designing and determining the technological modes of operation of various hydraulic devices in the technology of complex processing of fly ash from TPPs.

scholarly journals Optimization Methods to Improve Energy Efficiency of Centrifugal Pumps at Thermal Power Plants

2019 ◽  
Vol 8 (4) ◽  
pp. 9617-9625
Keyword(s):  
Energy Efficiency ◽  
Centrifugal Pump ◽  
Power Plants ◽  
Thermal Power ◽  
Optimization Methods ◽  
Thermal Power Plants ◽  
Engineering Optimization ◽  
Centrifugal Pumps ◽  
Operation Condition ◽  
Improve Energy Efficiency

This article considers the application of engineering optimization methods as a way to improve the energy efficiency of centrifugal pumps operated in thermal power plants taking into account the pump load diagram. The authors present an algorithm of engineering optimization of the wetted part of impeller being an individual working body of a centrifugal pump, as well as the results of approbation of the proposed approach for the centrifugal pump KM 65-50-160 designed in two optimized versions taking into account various options of the pump load diagram. It is revealed that the application of engineering optimization methods allows achieving higher energy efficiency indicators even in a significantly simplified formulation of the problem under consideration. According to the calculation results, when the pump operation condition is met, the KM 65-50-160 pump with an optimized wetted part of the impeller designed in two versions has higher average integral efficiency in comparison with its counterpart designed according to classical methods, namely, 52.24% vs. 49.18%, and 57.9% vs. 57.02%, respectively.

Study on Transient Stability Simulation of District Grid Containing High Proportion of Wind Power

2014 ◽  
Vol 1070-1072 ◽  
pp. 275-278
Author(s):  
Li Lin ◽  
Shuang Zhao ◽  
Meng Ze Yu ◽  
Bo Jian Ding
Keyword(s):  
Wind Power ◽  
Power Plants ◽  
Large Scale ◽  
Wind Farm ◽  
Fault Location ◽  
Transient Stability ◽  
Thermal Power ◽  
Wind Farms ◽  
Operating Modes ◽  
The Impact

As wind is random, intermittent and instability, with continual installation of wind farms, the impact of large scale wind farm on power system has become an important issue for integration and operation of wind farm. Aiming at studying the transient stability of district grid containing high proportion of wind power, numerical simulations with BPA for an actual district grid of China Southern Power Grid are presented. In these simulations, the interaction between the large-scale wind farm and traditional thermal power plants (TPPs) is investigated taking the different operating modes and fault location into account. The critical clearing time (CCT) is adopted as the measurable indicator to assess the interaction.

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