The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Polish power system is facing increase in demand for energy relative to stagnation in development of installed power capacity, caused mainly by CO2 emissions reduction policy. Therefore, investments resulting with increase of energy efficiency, hence lower emissions relative to produced power are becoming more important. Recently much greater attention is diverted to cogeneration of heat and electric...
Transmission and Distribution (T&D) Companies tie to several generation plants and other utilities to make an electric transmission grid. Each of the interconnection facilities is governed by the Guidelines that ensure smooth operation of the Power System. However, the Interconnection guidelines are generally limited to equipment at the Point of Interconnection (POI), therefore a thorough investigation...
This paper analyzes influence of different operation regimes on CHP main electrical equipment reliability. Authors use statistics and Monte-Carlo method based simulation to evaluate influence of different operating regimes on synchronous generator, main circuit breaker and step-up power transformer reliability. Results are compared to VGB Powertech CHP fault statistic.
This paper reviews the historical background, present state, future challenges and opportunities of Control, Automation and Protection systems for a modern Combined Cycle (CC)/Co-generation Power plant. As the demand for lean, efficient, agile, and environmental friendly and low cost green energy methods grow, the need to automate combined cycle power plant process and auxiliaries continues. The recent...
This paper presents an improvement in the optimization of operation method of large electric machine for energy conservation in combined heat and power plant (CHP). The third power plant of CHP (CHP3) is placed in Ulaanbaatar, Mongolia. CHP3 of a coal-firing plant is expected to make Ulaanbaatar a smart city because the utility grid cannot control its plant at present. Since CHP3 needs to realize...
This paper presents theoretical background and experimental results obtained during development of a car compressor driven by a turbine and a high speed permanent magnet motor. Alternatively, the turbocharger used in combination with an auxiliary boost motor can be used not only in the car, but with some modifications as CHP unit (Combined Heat and Power). The control algorithms for work in infinite...
This paper presents the theoretical background and experimental results obtained during the development of a small combined heat and power unit. The unit's final output power when the development is finished should be 3kW of electrical power. The unit was built with an automotive turbocharger acting as a turbine and a high-speed permanent magnet synchronous machine. The achieved parameters so far...
Cogeneration system isnonlinear, wide range of operating regime, and multivariate. The generating efficiency and thermoelectric conversion coefficient of turbine generator are affected by many factors such as load variation, extracted steam change, and unstable supplied power etc. In this paper, a statistical model identification algorithm has been proposed to build the model of generating efficiency...
Micro-turbine (MT) technology is becoming more popular and viable distributed energy source in the recent years. This is due to their advantages such as high operating efficiency, ultra low emission levels, low initial cost and small size. The integration of the increasing portion of MTG within the existing infrastructure requires a full understanding of its impact on the distribution network and...
In this paper, for the actual case study, the portion of generated low pressure (LP) steam of heat recovery steam generator (HRSG) is investigated for the absorption chillers used in residential space cooling of power plant. Parametric study indicates the effects of different parameters, such as steam to gas mass flow rate ratio, fraction of steam extraction from the exhaust of LP line in HRSG for...
The paper discusses the effectiveness of the MicroGrid (MG) in a distribution system. Combined heat and power (CHP) system has been used to enhance the overall efficiency of the power system. Microturbines have been used for CHP operation in this paper. The various methods of controls of the MG are also discussed. A simple and low cost model for MG based on frequency droop control for active power...
Micro-turbine based high speed gensets exhibit several interesting features such as compactness and light weight, low maintenance, fuel flexibility, relatively low emissions, durability, high reliability etc. They represent an interesting solution in the distributed generation perspective, especially when employed as mid-low power co-generation units possibly exploiting byproducts of farming activities...
Increasingly unpredictable electricity production from renewable sources (wind, solar and ocean energy) combined with high levels of inflexible generation has resulted in the electricity industry facing a challenge to match electricity supply and demand. As a result electricity system operators and electricity generators have been looking for ways to store electricity. Common forms of energy storage...
Dual mode running characters and grid-connected technology with two different structured micro turbines (MT) are compared and analyzed respectively in this paper. Firstly, the operating modes of MT are introduced briefly. Then operating characters and influence on traditional system protection are analyzed while MTs are connecting to the grid. The different dual mode schemes are compared via simulating...
Renewable energy sources are increasingly playing a key role in the operation and evolution of the power electric systems. However, their incorporation bring with it diverse concerns. A very important issue has to deal with the fluctuations of the renewable resources. Compressed air-based energy storage systems (CAES), with favorable characteristics are a sound means for allowing the efficient integration...
In most sugar cane mills there are consumers of steam (process). They work with a very small pressure compared with the one obtained in the steam boilers, this pressure is increased even more if over heaters are used. In order to obtain this low operation pressure, it is necessary to pass the steam through a reducing valve. If this steam goes through a back-pressure turbine and electric power is thus...
This paper presents modeling and simulation of microturbine (MT) models to analyze its load following performance as distributed energy resource (DER) with general as well as critical priority loads. Two different models of MT were considered for performance analysis. The first model consists of speed governor, acceleration control, and temperature control blocks while the other is GAST model of MT...
This paper presents modeling and simulation of microturbine (MT) to analyze its load following performance as distributed energy resource (DER) with general as well as critical priority loads. The system comprises of a synchronous generator and a MT coupled to it. Simulations are carried out in islanded and grid-connected mode of the system to observe its behavior when supplying customerpsilas variable...
The prospects of a creation of the high-temperature coal-fired combined steam-cycle power units which operate similarly to combined cycle plants, but use superheated steam at pressure about 1 MPa instead of gas in the upper cycle (implementing the Field-Baranovsky cycle), are considered in the article. The calculation results for the high-temperature turbocompressor set in the power range from 30...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.