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The gas electricity generation is not only alleviating the present energy tight situation in our country, but also is one of the most effective ways to comprehensible use gas resources. A remote monitoring system for gas-combustion generator units based on Power Builder is presented in this information of paper. The system can remote control units start-up or shut-down, can remote measure automatic...
In this paper an Aircraft power generation topology is proposed for a More Electric Engine. There two generators are attached to the engine, a startergenerator on the high pressure- and a generator on the low pressure shaft. Both electric outputs are connected in parallel and feed together one 270 VDC power system of the airplane. The aim is to control the power of the two generators. Therefore several...
This paper investigates the performance characteristics of rapeseed methyl ester, EN 14214 biodiesel, when used for electrical generation in compression ignition engines. The work was inspired by the need to replace fossil diesel fuel with a sustainable low carbon alternative while maintaining generator performance, power quality and compliance with ISO 8528-5. A 50 kVA Perkins diesel engine generator...
A quasi-dimensional spark ignition (SI) engine cycle model is used to predict the combustion and exhaust emissions of a gas engine driven generator for the cases of using biogas and liquefied petroleum gas (LPG)-biogas blends. Two different thermodynamic regions consisting of unburned gases and burned gases that are separated by the flame front are considered. Liquefied petroleum gas (0%, 5% and 15%)...
An improved fuzzy adaptive PID controller is proposed in the paper, in which the count of fuzzy quantity can be increased according to the practical situation. During operation period, the improved fuzzy adaptive PID controller can amend PID coefficients automatically to enhance dynamic characteristic of electronic speed governor according to gasoline engine speed change each stage in the transition...
Diesel engine type of generators that uses fuel to produce electricity are common in many countries which suffer from inconsistency in electricity supply. To lower the cost, manufacturers tend to purchase secondhand generators to ensure constant supply of electricity during production. However, manufacturers do not have the proper skill to assess the health of second-hand generators. This, coupled...
In order to improve aircraft efficiency, reliability and maintainability, the aerospace world has found in the progressive electrification of on-board services the way to reduce or to remove the presence of the hydraulic, mechanical and the bleed air/pneumatic systems. This concept is called more electric aircraft (MEA), which involves the introduction of the electromechanical actuators (EMAs) and...
This paper presents the design of a discrete event controller for Marnoch Thermal Energy Conversion (MTEC) system test bed for optimization its performance. The controller has been designed with a simulation of the MTE using MATLAB, Simulink, and Stateflow software. A UML model is developed to analyze inputs and outputs requirements for the controller which drives valves and flow direction between...
With the growing concerns on price fluctuation and depletion of petroleum resources and global warming, there is fast growing interest in hybrid electric vehicles (HEVs) globally. Thus, it is a pressing need for researchers to develop energy efficient devices for various kinds of HEVs, including micro, mild and full hybrids. In this paper, an emerging energy efficient technology will be investigated...
This paper describes the gear-shift schedules for the Automated Mechanical Transmission(AMT) utilized in the parallel hybrid vehicle, which is equipped with an Integrated Starter Generator (ISG). The effects of the battery's state of charge (SOC) and ISG's performance on the gear shift schedules have been investigated. Both the power gear-shift, schedule in which the ISG provides the peak torque all...
The marine sector is a large part of the global transportation system. There is an increasing need for reducing emission to air and more energy efficient operation for the whole industry. This will have strong influence on the energy system on-board. All aspects from ship design, propulsion, machinery, power distribution and service have to be considered. In section II On-board distribution system...
Homogeneous charge compression ignition (HCCI) engines create a cleaner and more efficient power source for either stationary power generators or hybrid vehicles. Control of HCCI engine, however, is difficult since its ignition cannot be actuated directly. For the purpose of model-based analysis and controller design, a model for a single cylinder HCCI engine with electric mechanical valves (EMV)...
This paper presents a new modular hybrid power system incorporating photovoltaic and small scale wind generators connected to an AC grid formed by a doubly fed induction generator driven by a variable speed diesel generator operating in the optimum fuel efficiency mode. Preliminary experimental and simulation results of the DFIG are included. The system is proposed to replace medium scale diesel-only...
Three different strategies based on a theoretical model were used to simulate engine start process respectively, start in constant speed without compensation, start in constant speed with compensation, normal start. Predication results are presented here. Bench tests were also carried out, which are related to the three control strategies. It is found that the start in constant speed with compensation,...
According to the design requirements, the powertrain dynamic simulation model of an integrated starter/generator (ISG) hybrid electric vehicle (HEV) was established using Simulink. The parallel electric assist control strategy (PEACS) was researched and designed in this paper. The analysis of dynamics performance and fuel economy of the model was carried out under the FTP drive cycle, which can provide...
The original free-swinging piston engine with the oscillating rotating generator distinguishes by its compactness, minimum frictional losses, full-balanced mechanical system, possibility of four-stroke operation of the engine, possibility of the multifuel operation of the engine, optimal magnetic circuit of the electrical generator, etc. Because the engine can optimally operate over whole range of...
This paper analyses a power system formed by a combustion engine and an electric linear generator. Such system allows to transmit the power from a combustion engine directly to an electric generator without a crank mechanism and a fly wheel. The classical solution is compared with new system. Results of calculations are presented. They show that some optimum speed exists for the concrete aggregate...
In this paper the optimization of wearable power system comprising of an IC engine, motor/generator, inverter/rectifier, Li-battery pack, DC/DC converters, and controller is performed. The Wearable Power System must have the capability to supply an average 20 W for 4 days with peak power of 200 W and have a system weight less then 4 kg. The main objectives are to select the engine, fuel and battery...
The free-piston engine system uses a linear motion of the piston. And the free-piston engine system can guarantee a high efficiency and reliability in the energy conversion process because of the absence of the mechanical motion conversion devices like a crankshaft, a connecting rod, etc. The mover of linear generator move using electric force in the starting mode, because free-piston engine can not...
This paper presents a power converter configuration interfaced with the distributed ac power generation system to regulate the dc bus voltage. It is composed of a pulsewidth modulation (PWM) rectifier directly tied to the generator's terminals without ac reactors. Hence terminal voltages are not useful due to the switched pulse of the PWM rectifier and also it is not the terminal voltages, but the...
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