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Search Results: 1 - 10 of 4532 matches for " Diesel generator set "
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The Numerical Modeling of Transient Regimes of Diesel Generator Sets
Tiberiu Tudorache,Cristian Roman
Acta Polytechnica Hungarica , 2010,
Abstract: This paper deals with the numerical modeling of a diesel generator set used as amain energy source in isolated areas and as a back-up energy source in the case ofrenewable energy systems. The numerical models are developed using a Matlab/Simulinksoftware package and they prove to be a powerful tool for the computer aided design ofcomplex hybrid power systems. Several operation regimes of the equipment are studied.The numerical study is completed with experimental measurements on a Kipor type dieselelectricgenerator set.
International Journal of Engineering Science and Technology , 2013,
Abstract: Electrical power generation by Diesel engine + electrical Generator (DG) sets consumes precious fossil fuels. In the present work, performance of two different DG sets of 3 kW and 100 kW ratings are compared when they were additionally supplied with wood derived Producer Gas (PG) generated in a gasifier. The PG was cleaned and cooled before it was supplied to the DG sets. The salient feature of 3 kW system is that the PG does not come into direct contact with water during cleaning and cooling, whereas it does so in 100 kW system. In the experiments, both DG sets were operated in fully diesel and dual fuel (PG + diesel) modes. Diesel Consumption Rate, Diesel Replacement Percentage, Specific Diesel Consumption, Electrical Conversion Efficiency were calculated for the DG sets. Because of certain improved features and operating conditions, the 100 kW DG set could be operated more efficiently than the 3 kW DG set. Hence, electrical power generation by DG set using PG + diesel can be achieved more economically at higher power ratings.
Load Compensation by Diesel Generator and Three Level Inverter Based DSTATCOM
Mr. K. Murali
International Journal of Engineering Trends and Technology , 2012,
Abstract: This paper presents the load compensation by diesel generator. In this compensation reactive power, harmonics and unbalanced load current generates because of linear or nonlinear loads. The control of Distribution Static Synchronous Compensator (DSTATCOM) is used for reactive power, harmonics and unbalanced load current compensation. Proportional – Integral (PI) controller is used to maintain a constant voltage at the dc – bus of a voltage – source converter (VSC) working as a DSTATCOM. Switching of ThreeLevel VSC is achieved by controlling load current using Sinusoidal Pulse Width Modulation (SPWM) control. This scheme is simulated under MATLAB environment using simulink toolboxes for feeding linear and nonlinear loads. The modeling is performed for a three – phase, three – wire star – connected synchronous generator coupled to a diesel engine, along with the three level inverter based VSC working as a DSTATCOM.
Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System  [PDF]
Miguel Torres, Luiz A. C. Lopes
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.53027

This paper presents the modeling, simulation and practical implementation of an inverter-based diesel generator emulator. The main purpose of this emulator is for the study of frequency variations in diesel-based autonomous power systems in a laboratory environment where the operation of a real diesel generator is not possible. The emulator basically consists in a voltage source inverter with a second order output filter which voltage references are given by the model of the diesel generator. The control of the emulator is based on the digital signal processor TMS320F2812, where the mathematical models of the diesel generator and the control of the inverter are computed in real-time. Parameters for the model were obtained from commercially available components. Experimental results for different values of speed droop showed that the emulator achieves a satisfactory performance in the transient and stationary response. For the stationary response, the measured frequency deviates from theoretical values with a mean absolute error of: 0.06 Hz for 0% droop, 0.037 Hz for 3% droop, and 0.087 Hz for 5% droop. For the transient response, the measured frequency nadir deviates from simulations in: 0.05 Hz for 0% droop, 0.02 Hz for 3% droop, and 0.1 Hz for 5% droop.

Performance of a Wind-Diesel Hybrid Power System with STATCOM as a Reactive Power Compensator  [PDF]
Pawan Sharma, Trilochen Singh Bhatti, Kondapi Seha Srinivasa Ramakrishna
Smart Grid and Renewable Energy (SGRE) , 2010, DOI: 10.4236/sgre.2010.13020
Abstract: The paper deals with automatic reactive power control of an isolated wind-diesel hybrid power system. The power is generated by diesel engine and wind turbine as prime movers with electrical power conversion by permanent-magnet synchronous generator (PMSG) and permanent-magnet induction generator (PMIG) respectively. The mathematical model of the system developed is based on reactive power flow equations. The paper investigates the dynamic performance of the hybrid system for 1% step increase in reactive power load with 1% step increase in input wind power.
Microgeneration of electricity with producer gas in dual fuel mode operation
Silva, Marcelo J.;Souza, Samuel N. M. de;Ricieri, Reinaldo P.;Souza, Abel A.;Secco, Deonir;
Engenharia Agrícola , 2011, DOI: 10.1590/S0100-69162011000500005
Abstract: among the alternatives to meet the increasing of world demand for energy, the use of biomass as energy source is one of the most promising as it contributes to reducing emissions of carbon dioxide in the atmosphere. gasification is a technological process of biomass energy production of a gaseous biofuel. the fuel gas has a low calorific value that can be used in diesel engine in dual mode for power generation in isolated communities. this study aimed to evaluate the reduction in the consumption of oil diesel an engine generator, using gas from gasification of wood. the engine generator brand used was a branco, with direct injection power of 7.36 kw (10 hp) coupled to an electric generator 5.5 kw. diesel oil mixed with intake air was injected, as the oil was injected via an injector of the engine (dual mode). the fuel gas was produced in a downdraft gasifier. the engine generator was put on load system from 0.5 kw to 3.5 kw through a set of electrical resistances. diesel oil consumption was measured with a precision scale. it was concluded that the engine converted to dual mode when using the gas for the gasification of wood decreased diesel consumption by up to 57%.
Nonlinear H-two/H-infinity synthetic controller for diesel-generator set

HUANG Man-lei,SONG Ke-ming,WEI Zhi-da,

控制理论与应用 , 2011,
Abstract: The stability of an isolated power system is determined by the speed and voltage response characteristic of the diesel-generator set. The control system of a diesel-generator set is a nonlinear control system. Because of the interaction between speed and voltage, it is necessary to control them synthetically. To analyze the dynamic characteristics of this system, a nonlinear mathematical model of diesel-generator set is built first, and a nonlinear H-two/H-infinity synthetic controller is then designed. In combining the direct feedback linearization with the mixed H-two/H-infinity control theory to design the synthetic controller for the diesel-generator set, the specifications of the system are transformed to that of a standard H-two/H-infinity control problem, and a nonlinear H-two/H-infinity synthetic control law is developed for the diesel generator set. The computer simulation results show that the nonlinear H-two/H-infinity synthetic controller effectively improves the dynamic precision of the system and suppresses the load disturbance, thus providing desirable stability for an isolated power system.
Nonlinear H-two/H-infinity speed regulator for a diesel-generator set

HUANG Man-lei,Song Keming,Wei Zhida,

控制理论与应用 , 2009,
Abstract: The frequency stability of a ship power system is determined by the speed response characteristic of the diesel engine speed regulation system, which is a nonlinear control system. To analyze the dynamic characteristic of this system, a nonlinear mathematical model is built first, and then, a nonlinear H-two/H-infinity controller is designed. In combining the direct feedback linearization with the mixed H-two/H-infinity control theory to design the speed regulator for the dieselgenerator, we transform the specifications of the system to that of a standard H-two/H-infinity control problem, and then develop a nonlinear H-two/H-infinity speed control law for the diesel engine. The computer simulation results show that the nonlinear H-two/H-infinity speed regulator effectively improves the dynamic precision of the system and suppresses the load disturbance, thus providing desirable frequency stability for a ship power system.
Dispatch, Control Strategies and Emissions for Isolated Wind-Diesel Hybrid Power System
Prof. Bindu U. Kansara,,Dr. B.R. Parekh
International Journal of Innovative Technology and Exploring Engineering , 2013,
Abstract: Depleting oil reserves and the growing concerns of global warming, have made it compulsory to seek alternative in form of environment friendly technologies like renewable energy sources. The advantage of hybrid power systems is the combination of the continuously available diesel power and locally available, pollution-free wind energy. With the Wind-Diesel hybrid power system, the annual diesel fuel consumption can be reduced and, at the same time, the level of pollution can be minimized. A proper control and dispatch strategy has to be developed to take full advantage of the wind energy during the periods of time it is available and to minimize diesel fuel consumption. The paper presents two dispatch strategies (i) load following and (ii) Cycle charging along with different system controls. For the proposed system, load following dispatch strategy along with its system control performs better than the cycle charging strategy.
Power Managment of Cell Sites
R.Surendra,B.Karunaiah,Murali Mohan K V
International Journal of Computer Technology and Applications , 2012,
Abstract: —This paper presents a method to design a Power management of Cell Sites. The method makes use of GSM modem. The GSM modem which gives the instant message about the mains power supply to the cell sites. The temperature sensors and relay will sense the temperature of the room and if the main fails the GSM module will send the message to the master mobile which is already set in the system. The cell site base transreciever (BTS) which are operated by Diesel generator, when the power is off we can switch on the Diesel generator by sending the SMS command like (DG ON) or we can switch of the generator with the command (DG OFF).The method can greatly improve the developing efficiency, reduces the delay and fuel consumption. The proposed one has better performance and involves less hardware complexity. This is a single comprehensive solution that remotely controls and monitors the subsystems inside each base station site and enables network operators to coordinate and manage the conditions at all base station sites across their network
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