Forecasting, systems analysis, and optimization of the structural development of the energy sector

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Kulyk M. M. Comparative Analysis of Technical and Economic Features of Kaniv PSPS and a Suite of Load-Controlled Consumers for Following Electrical Load Curves (Ukr.) Kulyk M. M. Comparative Analysis of Technical and Economic Features of Kaniv PSPS and a Suite of Load-Controlled Consumers for Following Electrical Load Curves (Ukr.)

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Board № (full): 4 (39) 2014 year
Filesize: 466.11 kB
Downloads: 3819
Calculations have been carried out and major technical and economic features of design of Kaniv Pumped Storage Power Station (PSPS) approved for construction in 2013 and an alternative proprietary design of a suite of heat pump plants (HPP), which is capable of replacing Kaniv PSPS in the structure of the Integrated Energy System of Ukraine in terms of its process characteristics, have been subjected to the comparative analysis.
It has been demonstrated that the alternative design of the construction of a suite of HPPs is undoubtedly better in comparison with the design of Kaniv PSPS in terms of the technical and economic indicators. For instance, it requires less capital investment (UAH 2,487.4 million USD 306б4 mln) less in 2012 prices), offers higher annual net profit (UAH 5,617.1 million USD 692 mln more) than the design of Kaniv PSPS, and brings the invested capital payback period to 1.55 years instead of 24.6 years under the said PSPS design.
The alternative project implementation makes it possible to reduce the natural gas consumption by boiler houses and cogeneration plants by 2.6 billion cubic metres (bcm), because HPPs make use of the electrical energy generated without gas. This feature is very important from the point of view of Ukraine’s energy security.
In addition, the alternative design calls for the annual consumption of 2.69 million tonnes of equivalent fuel in the form of the waste heat and ambient energy contributing to a major increase in its economic efficiency and a reduction in greenhouse gas (GHG) and other contaminant emissions. It entails no threats of the natural landscape disfigurement and the loss of historical monuments.

Keywords: PSPS, load-controlled consumer, heat pump plant, net profit, cost, capital investment, payback period.

Bilodid V. D. Forecast of the structure of heat supply of Ukraine for the period till 2040 Bilodid V. D. Forecast of the structure of heat supply of Ukraine for the period till 2040

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Board № (full): 1 (44) 2016 year
Filesize: 2.86 MB
Downloads: 2858
Based on the analysis of the state of heat supply and hypothetical variant of the forecast of economic development of Ukraine, we substantiate the grounds for the reasonable strategy of the development of Ukrainian heating systems for the period till 2040. We propose the rational structure of heat-generating capacities of the country by two scenarios: excluding the occupied territories (AR of Crimea and certain parts of Donetsk and Lugansk regions) and for the whole Ukraine. The development of this branch is proposed to be carried out mainly on the basis of wide using heatpump technologies and alternative types of fuel, which will lead to the reduction of natural gas consumption and heat production by boiler houses. According to scenario 1 (in the case of return of the occupied territories to Ukraine), it is estimated that the volume of heat energy generation in 2040 will reach 439.1 million Gcal. According to scenario 2 (in the case of non-return of the occupied territories to Ukraine), the estimated volume in 2040 will be by 80 million Gcal less.

Key words: strategy of development, heat supply, structure of capacities, heatpump, boiler houses, forecast.

Bodnja A. L. Coal Industry Development Model Bodnja A. L. Coal Industry Development Model

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Board № (full): 2 (3) 2000 year
Filesize: 136.06 kB
Downloads: 3706

The model of optimal operating and development of the coal industry as the basic branch of Ukraine's energy sector has been proposed in the article. The set of methods for model calculations has been developed.

Keywords: energy sector, mathematical model, coal industry.

Derii V. O. Potential of thermal energy accumulation in distric heating systems networks Derii V. O. Potential of thermal energy accumulation in distric heating systems networks

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Board № (full): 4 (39) 2014 year
Filesize: 418.71 kB
Downloads: 3774
When using the electrothermal consumers-controllers (ETCC) in distric heating (DH) systems for frequency control, and for active power it is important to know their power during the heating and non-heating seasons and dependency of such power on the ambient temperature. Currently these issues are not studied completely that can be an obstacle to mass adoption of ETCC in DH systems.
Total capacity of standard heat generators and ETCC transferred to the networks is distributed as follows: one part of it is designed to compensate the losses, the second part – to compensate heat load of consumers, and the third part causes the heat energy accumulation, which circulates in the networks.
The conducted studies have shown that during the heating season the value of accumulated heat in the networks is directly proportional to the ambient air temperature. This dependency is expressed by a piecewise linear function. When ambient air temperature is smaller than calculated one, accumulation in heat networks is impossible. This can be explained by the fact that the parameters of the heat carrier reached the maximum permissible values for safety operation of the network, all energy in the network compensates the heat load and losses. When increasing ambient air temperature, the accumulation potential increases reaching a maximum value at the culminating point of the temperature chart.
During non-heating season the only load of DH system is hot water. Heat carrier consumption is 2-3 times smaller than during the heating season. Heat energy accumulation time in the networks coincides with time of minimum hot water distribution. In order to be within the maximum heat carrier temperature in the return pipeline, heat energy can be accumulated at the expanse of increasing the heat carrier consumption at constant temperature in the supply pipeline. The value of accumulated heat energy will be much lower than during the heating season.

Keywords: heating networks, accumulation, heat load, temperature chart, heating power, heat carrier consumption, heat carrier temperature, potential.

Dryomin I. V. The determination of maximum capacities of solar power plants in IPS of Ukraine Dryomin I. V. The determination of maximum capacities of solar power plants in IPS of Ukraine

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Board № (full): 2 (45) 2016 year
Filesize: 1.98 MB
Downloads: 3193
The maximum value of the solar power plant (SPP) in the power system depends on the performance reserve and regulating capacity of the automatic frequency and power control (AFPC) system. It is believed that the regulatory capacity of the system AFPC enough if AFPC is able to compensate for perturbations caused by the action of SPP. The frequency deviation in the power system should remain in the range of ±0.02 Hz (according to the requirements of ENTSO-E) or ±0.2 Hz (actual requirements for IPS of Ukraine).
Given the approach (program of experiments, the algorithm of their conduct) to the determination of maximum capacities of SPP as a part of IPS of Ukraine. As a result of experiments obtained values of maximum capacity of SPP that the system AFPC is able to compensate under different initial conditions. Among them: the different types and composition of regulators (hydrounits of hydroelectric power plant, coal-fired thermal power plants, controllable loads); the permissible frequency deviation of 0.2 Hz or 0.02 Hz; the maximum power the various regulators, and SPP.
As a result of research, including it is established that, for example, for a permissible frequency deviation of 0.2 Hz in IPS of Ukraine with AFPC based on the pulverized coal (PC) power station with a reserve of 1000 MW power limit SPP is 581 MW, whereas for compensation of SPP power of 1 GW need generators-regulators PC thermal power plant with the capacity of 9.3 GW. This variation is explained by the self-regulatory effect which is manifested at AFPC with PC thermal power plants due to low performance of this type of regulators. To compensate for a 1 GW SPP ceteris paribus will require 310 MW generators-regulators hydroelectric power plant of 300 MW or controllable load.

Keywords: mathematical modeling, automatic control, frequency control, solar power plant, generatorregulator, controllable load, automatic frequency and power control system, interconnected power system.
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