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This paper describes a fixed maximum power point analog control used in a step-down pulse width modulated power converter. The DC/DC converter drives a DC motor used in small water pumping installations, without any electric storage device. The power supply is provided by PV panels working around their maximum power point, with a fixed operating voltage value. The control circuit implementation is...
With rapid development of wind power technologies and significant growth of wind power capacity installed worldwide, various wind turbine concepts have been developed. The wind energy conversion system is demanded to be more cost-competitive, so that comparisons of different wind generator systems are necessary. An overview of different wind generator systems and their comparisons are presented. First,...
The global electrical energy consumption is still rising and there is a steady demand to increase the power capacity. The production, distribution and the use of the energy should be as technological efficient as possible and incentives to save energy at the end-user should be set up. The deregulation of energy has lowered the investment in larger power plants, which means the need for new electrical...
Unlike conventional power system, the system voltage and frequency of some renewable energy resources based stand-alone distribution generation (DG) system maybe controlled by power electronics converters. This paper presents the control of parallel operation multi-converters in a DG system. The investigated stand-alone DG system is constructed by two local DG subsystems; in each of them, two power...
A large number of distributed generation (DG) units are being integrated into power systems at distribution level. The DG units play an essential role in affecting the efficiency and performance of power systems. This paper describes some possible controlling modes of DG units. The operation and control of the power systems consisting of DG units, in particular separated subsystems, are discussed...
With the development of power electronic techniques, more and more attention has been paid to DC power systems. This paper analyzes the load flow issues containing DC/DC converters in a DC power system. The load flow model of DC/DC converters, which considers the power losses and control strategy of the converter, has been presented and integrated into the traditional load flow algorithm by modifying...
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