scholarly journals Device for Reduction Sparking of Slip Ring of Turbo Generator

2015 ◽  
Vol 2 ◽  
pp. 116
Author(s):  
Andrei N. Isakov ◽  
Andrei V. Andrusich ◽  
Igor E. Savraev
Keyword(s):  
Power Plants ◽  
Contact Layer ◽  
Electrical Circuit ◽  
Synchronous Generators ◽  
Correct Operation ◽  
Technical Performance ◽  
Slip Ring ◽  
Turbo Generator ◽  
Energy Economy ◽  
Contact Unit

Most modern power plants generating electric power equipped with synchronous generators. The correct operation of energy economy depends on reliability of such electrical machines. In this article issue of increasing reliability of turbo generator by increasing reliability of its brush contact unit is considered. Description of brush contact unit and its possible damages is given. Equivalent electrical circuit of contact layer of brush contact unit is performed. The equations are formed and the dynamical simulation model consisting of electric source and two brush contact units is created. With help of this model alternative method of improving parameters of brush contact unit and increasing reliability of turbo generator at once is calculated and shown. The implementation of the proposed method of increasing the turbo generator brush contact units reliability can have different technical performance, but the principle laid down in the method remains the same.

scholarly journals Electromechanical Design of Synchronous Power Controller in Grid Integration of Renewable Power Converters to Support Dynamic Stability

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2115
Author(s):  
Mostafa Abdollahi ◽  
Jose Ignacio Candela ◽  
Andres Tarraso ◽  
Mohamed Atef Elsaharty ◽  
Elyas Rakhshani
Keyword(s):  
Dynamic Stability ◽  
Power Plants ◽  
Power Converters ◽  
Power Grids ◽  
Synchronous Generators ◽  
Power Controller ◽  
Renewable Power ◽  
Grid Connection ◽  
Control Technologies ◽  
Control Layer

Nowadays, modern power converters installed in renewable power plants can provide flexible electromechanical characteristics that rely on the developed control technologies such as Synchronous Power Controller (SPC). Since high renewable penetrated power grids result in a low-inertia system, this electromechanical characteristic provides support to the dynamic stability of active power and frequency in the power generation area. This goal can be achieved through the proper tuning of virtual electromechanical parameters that are embedded in the control layers of power converters. In this paper, a novel mathematical pattern and strategy have been proposed to adjust dynamic parameters in Renewable Static Synchronous Generators controlled by SPC (RSSG-SPC). A detailed dynamic modeling was obtained for a feasible design of virtual damping coefficient and virtual moment of inertia in the electrometrical control layer of RSSG-SPC’s power converters. Mathematical solutions, modal analysis outcomes, time-domain simulation results, and real-time validations of the test in IEEE-14B benchmark confirm that the proposed method is an effective procedure for the dynamic design of RSSG-SPC to provide these dynamic stability supports in grid connection.

Overall Performance of Advanced H2/Air Cycle Power Plants Based on Coal Decarbonisation

2005 ◽  
Author(s):  
M. Gambini ◽  
M. Vellini
Keyword(s):  
Power Plant ◽  
Hydrogen Production ◽  
Power Plants ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Fuel Gas ◽  
Production Section ◽  
Pinch Technology ◽  
Energy Economy ◽  
Overall Performance

In this paper the overall performance of a new advanced mixed cycle (AMC), fed by hydrogen-rich fuel gas, has been evaluated. Obviously, hydrogen must be produced and here we have chosen the coal gasification for its production, quantifying all the thermal and electric requirements. At first, a simple combination between hydrogen production section and power section is performed. In fact, the heat loads of the first section can be satisfied by using the various raw syngas cooling, without using some material streams taken from the power section, but also without using part of heat, available in the production section and rejected into the environment, in the power section. The final result is very poor: over 34%. Then, by using the Pinch Technology, a more efficient, even if more complex, solution can be conceived: in this case the overall efficiency is very interesting: 39%. These results are very similar to those of a combined cycle power plant, equipped with the same systems and analyzed under the same hypotheses. The final result is very important because the “clean” use of coal in new power plant types must be properly investigated: in fact coal is the most abundant and the cheapest fossil fuel available on earth; moreover, hydrogen production, by using coal, is an interesting outlook because hydrogen has the potential to become the main energy carrier in a future sustainable energy economy.

Evaluation of Topping and Bottoming Cycle Hybrid Power Plants With MCFC-Micro Turbine

2004 ◽  
Author(s):  
Huisheng Zhang ◽  
Shilie Weng ◽  
Ming Su
Keyword(s):  
Hybrid System ◽  
Power Plants ◽  
High Efficiency ◽  
Simulation Models ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Design Point ◽  
Turbo Generator ◽  
Micro Turbine ◽  
Topping Cycle

The increasing use of electronic appliance has put a strain on the existing electrical supply system. The growing trend of distributed generation could result in small turbo generators being used in the home or rural area. Because small turbo-generator is ideally suited for coupling with a Molten Carbonate Fuel Cell (MCFC) stack, a high efficiency and flexible hybrid system representing a new total energy concept for the distributed power market is presented. This paper presents hybrid concept of bottoming and topping cycle MCFC-micro turbine system. The simulation models for micro turbine, MCFC stack and hybrid system are established. Based on an existing 10kW MCFC stack, we carried out the simulation on hybrid system. The results of the simulation are presented and discussed with particular regards to the selection of design point of different configurations of Hybrid System and design point performance of topping cycle and bottoming cycle Hybrid System.

Multipolar permanent-magnet synchronous generators intended for wind power plants

2012 ◽  
Vol 59 (14) ◽  
pp. 1035-1043
Author(s):  
L. K. Kovalev ◽  
K. L. Kovalev ◽  
Ye. Ye. Tulinova ◽  
N. S. Ivanov
Keyword(s):  
Permanent Magnet ◽  
Wind Power ◽  
Power Plants ◽  
Synchronous Generators ◽  
Permanent Magnet Synchronous Generators ◽  
Wind Power Plants

Optimizing Selection of Appropriate Power Generation Systems in Indonesia By Using Distance Based Approach Method

2004 ◽  
Vol 126 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Anugerah Widiyanto ◽  
Seizo Kato ◽  
Naoki Maruyama
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Power Plants ◽  
Quantitative Model ◽  
Energy Sources ◽  
Matrix Operations ◽  
Electric Power Sector ◽  
Energy Economy ◽  
Approach Method ◽  
Power Generation Systems

A deterministic quantitative model has been developed to compare the technical, economical and environmental feature of various electric power generating plants. The model, which is based on matrix operations, is used in evaluating the various aspects of energy sources available for electricity generation systems in a developing country. Several energy sources which could be considered for production of electricity to meet current and future electricity demands have been chosen. These will include fossil fuel fired, nuclear, and natural-renewable energy power plants. And, a set of criteria for optimized selection includes five area of concerns: energy economy, energy security, environmental protection, socio-economic development and technological aspects for the electric power generations. The model developed in this study is applied to the Indonesian’s electric power sector development. Most of the data required are obtained from various sources related to power industry in Indonesia, such as the electricity generating authority of Indonesia (Perusahaan Listrik Negara, PLN), Government of Indonesia, World Bank, Asian Development Bank, United Nations, and other sources, both in published and public domains. The result of this study will be a ranking of energy sources for Indonesia power generation systems based on the Euclidean composite distance of each alternative to the designated optimal source of energy.

scholarly journals A Survey on FOPID Controllers for LFO Damping in Power Systems Using Synchronous Generators, FACTS Devices and Inverter-Based Power Plants

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5983
Author(s):  
Mahdi Saadatmand ◽  
Gevork B. Gharehpetian ◽  
Innocent Kamwa ◽  
Pierluigi Siano ◽  
Josep M. Guerrero ◽  
...  
Keyword(s):  
Power Systems ◽  
Power Plants ◽  
Low Frequency ◽  
Test System ◽  
Synchronous Generators ◽  
Low Frequency Oscillation ◽  
Comprehensive Overview ◽  
Facts Devices ◽  
Fractional Order Pid ◽  
Fractional Orders

In recent decades, various types of control techniques have been proposed for use in power systems. Among them, the use of a proportional–integral–derivative (PID) controller is widely recognized as an effective technique. The generalized type of this controller is the fractional-order PID (FOPID) controller. This type of controller provides a wider range of stability area due to the fractional orders of integrals and derivatives. These types of controllers have been significantly considered as a new approach in power engineering that can enhance the operation and stability of power systems. This paper represents a comprehensive overview of the FOPID controller and its applications in modern power systems for enhancing low-frequency oscillation (LFO) damping. In addition, the performance of this type of controller has been evaluated in a benchmark test system. It can be a driver for the development of FOPID controller applications in modern power systems. Investigation of different pieces of research shows that FOPID controllers, as robust controllers, can play an efficient role in modern power systems.

scholarly journals ANALYSIS OF CLIMATIC PARAMETERS WHEN DESIGNING WIND POWER HIGH-RISE BUILDINGS

2021 ◽  
pp. 266-275
Author(s):  
Olga Krivenko
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Power Plants ◽  
Energy Resource ◽  
Climatic Parameters ◽  
Energy Potential ◽  
Technical Performance ◽  
High Rise ◽  
Wind Power Plants ◽  
Wind Potential

The relevance of the study is associated with the need to determine scientifically based principles for the design of wind-powered high-rise buildings. The article analyzes the main climatic parameters affecting the design of wind-powered high-rise buildings. While current research focuses mainly on the technical performance and savings of wind power plants (WPPs), modeling wind energy potential based on the analysis of climatic parameters allows you to optimize design solutions taking into account the influence of the environment. For various stages of the design of the integration of wind turbines into a high-rise building, it is important to take into account the dimensions of climate systems (macro, meso and micro levels), based on the laws operating within certain territorial boundaries. The article discusses the macroclimatic indicators that determine the total energy resource of wind in the region. The influence of the parameters of the mesoclimate on the wind potential has been determined, in accordance with the characteristics of the natural and anthropogenic environment (relief, the presence of forests, proximity to water bodies, urban development). The parameters that clarify the energy potential of the wind at the microclimatic level, taking into account the location of the wind turbine in the building, have been investigated. As a result of the analysis, a diagram of the structure of preliminary modeling of the energy wind potential at various climatic levels in the design of wind turbines in high-rise buildings has been determined. 

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