A speed control analysis for an in-line gasoline fueled internal combustion （IC） engine is presented for the purpose of alleviation of high frequency oscillations in engine revolutions. A dynamic cylinder-by-cylinde...A speed control analysis for an in-line gasoline fueled internal combustion （IC） engine is presented for the purpose of alleviation of high frequency oscillations in engine revolutions. A dynamic cylinder-by-cylinder model is proposed, base on slider-crank mechanism, which is extended to develop a digital governor providing a high fidelity estimation of rotary speed oscillation for hybrid vehicle engines. A modified PID controller that P and I gain is placed in feedback path is also described for hybrid electric vehicle （HEV） engine speed regulation, By comparison between measured and estimated signals, it is demonstrated that a good agreement has been achieved and the governor behaves an excellent damping speed ripple.展开更多
This paper investigates performance of the small-scale power supply system using solar PV(photovoltaic)and diesel generator.This paper is intended as an investigation on a reliability of solar PV and DG(diesel generat...This paper investigates performance of the small-scale power supply system using solar PV(photovoltaic)and diesel generator.This paper is intended as an investigation on a reliability of solar PV and DG(diesel generator)Hybrid System and the method of suppressing frequency fluctuations.In the remote area or island countries,diesel generator is a common technology for supplying power and more than two thirds of the systems located in developing countries.In general,the price of diesel oil is expensive in remote areas.To reduce fuel consumption in those areas,interconnection of solar PV to the isolated diesel power grid is one of the options.However,there is a problem on frequency fluctuations of energy output from the solar PV caused by changes in solar radiation.Experimental studies on the diesel-solar PV hybrid system were conducted using solar PV(2 kW),battery bank(24 V,420 Ah)and diesel generator(4.8 kW)and load(1,500 W)in Ashikaga University.Experiments are conducted by two different setups,a hybrid system of solar PV and DG and the hybrid with battery bank.In addition,the function of mechanical governor is adjusted in the experiments.The results of the experiments show the frequency fluctuation is smallest by the hybrid system with mechanical governor and battery bank.The system is technically feasible to be replicated as a reliable energy source for small power demand in remote areas.展开更多
基金This project is supported by National Hi-tech Research and Development Program of China(863 Program, No.2001AA501211).
文摘A speed control analysis for an in-line gasoline fueled internal combustion （IC） engine is presented for the purpose of alleviation of high frequency oscillations in engine revolutions. A dynamic cylinder-by-cylinder model is proposed, base on slider-crank mechanism, which is extended to develop a digital governor providing a high fidelity estimation of rotary speed oscillation for hybrid vehicle engines. A modified PID controller that P and I gain is placed in feedback path is also described for hybrid electric vehicle （HEV） engine speed regulation, By comparison between measured and estimated signals, it is demonstrated that a good agreement has been achieved and the governor behaves an excellent damping speed ripple.
文摘This paper investigates performance of the small-scale power supply system using solar PV(photovoltaic)and diesel generator.This paper is intended as an investigation on a reliability of solar PV and DG(diesel generator)Hybrid System and the method of suppressing frequency fluctuations.In the remote area or island countries,diesel generator is a common technology for supplying power and more than two thirds of the systems located in developing countries.In general,the price of diesel oil is expensive in remote areas.To reduce fuel consumption in those areas,interconnection of solar PV to the isolated diesel power grid is one of the options.However,there is a problem on frequency fluctuations of energy output from the solar PV caused by changes in solar radiation.Experimental studies on the diesel-solar PV hybrid system were conducted using solar PV(2 kW),battery bank(24 V,420 Ah)and diesel generator(4.8 kW)and load(1,500 W)in Ashikaga University.Experiments are conducted by two different setups,a hybrid system of solar PV and DG and the hybrid with battery bank.In addition,the function of mechanical governor is adjusted in the experiments.The results of the experiments show the frequency fluctuation is smallest by the hybrid system with mechanical governor and battery bank.The system is technically feasible to be replicated as a reliable energy source for small power demand in remote areas.
