Development On An Intelligent Static Phase Generator

With the rapid development of the Chinese economy, electric power consumption also rises fleetly. In recent years, the rising speed of electric power consumption is higher than that of economy development remarkably. Electric power resource has become very scanty. Hence, how to economize energy sources and reduce wastage has become a hot problem researched in recent years.In China, the quantity of electromotor-consumed electricity is 60%-68% of that of all industry-consumed electricity. Reactive wastage aroused by electromotor is central source of electricity wastage. Since large and medium-sized electromotor contribute mainly to the equipment consumed electricity of many industry enterprises, how to reduce wastage aroused by large and medium-sized electromotor has become the key to saving energy and reducing wastage for many industry enterprises.Intelligent Static Phase Generator (ISPG) is a kind of equipment of compensating reactive power, which technically designed for large and medium-sized Wound-Type electromotor to save energy and reduce wastage. It is linked serially to rotor of Wound-Type electromotor and can enhance power factor of electromotor.Development on ISPG can not only fulfill the potential of power supply equipments and reduce wastages of electric power to the aim of saving energy and enhancing economic benefits of enterprises, but also benefit the whole society. It also helps to save resources that are not recyclable, such as coal. Moreover, our country can reduce investment to build power plants, and so on.In this thesis, development on ISPG is studied and analyzed in depth. Through analysis the theory of reactive power compensator and combining with up-to-the-minute research fruit both at home and abroad, several compensating reactive power methods are compared. Then design and blue print of ISPG are discussed. Furthermore the system design, work theory, hardware and software of ISPG are introduced in detail. At last, system debugging is illuminated and experimental results are presented.The experiments show that ISPG can enhance power factor of electromotor to above 0.96 commonly. With the elevation of the power factor, stator electric current decrease obviously and its range is about 20%. So voltage loss and electric power wastage decrease effectively on electromotor power supply circuitry consequently. With the elevation of the power factor, reactive power on stator descends gradually, so the aim of saving energy and reducing wastage can come true.