Olhovskiy Vladimir Yakovlevich,
Myateg Tatyana Vladimirovna,
Nayaksov Sergey Yurievich
Abstract
One of the most important features of up-to-date technical progress in power engenieering is continuous increase of so called non-linear loads in amount and power. Such loads in electrical network result in high harmonics voltage which cause a number of negative effects in electrical network equipment functioning. The valve inverter and regulating devices are the most widely used among non-linear loads. This devices operate at 380/220 V. This work is aimed at analyzing high harmonics currents consumed by modern widely used non-linear electrical devices. Nowadays the exist a great vatiaty of such devices which are constantly upgrading. Such a tendency is typical of any powersupply systems, for example industrial, urban, rural and others. That is why specialist involved in designing powersupply systems are more and more interested in unsinusoidality currents consumed by small non-linear loads.
This paper deals with analyzing the operating modes peculiarities of some small devices such as rechargers and home appliances power sources (TVs, computers, washing mashinesetc) consumed power of which is not high. Is analyzed the operation mode of the induction motor is also equipped with ACS 550 frequency converter. If larger number of such devices is used it is necessary to minimize up to standart values high harmonics current and voltage in 380/220 V networks.
Keywords: adjustable-frequency electric drive; pulse-duration modulation; higher harmonics strategy.
Authors:
Olhovskiy Vladimir Yakovlevich
Phd, Associate Professor at the Industrial Power Supply Systems Department in the Novosibirsk State Technical University. His research interests are currently focused on calculation analyses and investigation of electrical energy quantity in industrial power supply systems. He is author of 30 scientific paper. (Address: 20, Karl Marx Av., Novosibirsk, 630073, Russia. E-mail: V.Olhov@ya.ru).
Myateg Tatyana Vladimirovna
Phd, Associate Professor of the Industrial Power Supply Systems Department in the Novosibirsk State Technical University. Her research interests are currently focused on calculation analyses and investigation of electrical energy quantity in industrial power supply systems; optimization functioning of thermal electrical power stations. He is author of 19 scientific paper. (Address: 20, Karl Marx Av., Novosibirsk, 630073, Russia. E-mail: tatianachekalina@ngs.ru).
Nayaksov Sergey Yurievich
master of Industrial Power Supply Systems Department in the Novosibirsk State Technical University. His research interests are currently focused on calculation analyses and investigtion of electrical energy quantity in industrial power supply systems. He is author of 3 scientific paper. (Address: 20, Karl Marx Av., Novosibirsk, 630073, Russia. E-mail: genius-7@mail.ru).
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