Improvement of the converter unit for a combined system of power supply of a local object with a wind gener-ator.
Journal Title: Наукові праці Донецького Національного Технічного Університету серія: Електротехніка і Енергетика - Year 2017, Vol 1, Issue 1
Abstract
Combined power supply systems for local objects use renewable energy sources and are connected to an alternating current grid. Autonomous wind generators contain an uncontrolled rectifier at the generator output, converters in a DC link and a grid inverter. There is promising, in the absence of a battery, to using an active rectifier providing stabilizati on of the voltage at the input of the inverter at the sinusoidal current of the generator, which will allow reducing energy losses in the power circuits of the converter unit. The purpose of the work: improvement of the converter unit of the combined power supply system of local objects with a wind generator with the use of an active rectifier of a voltage. It is proposed to use the regulator of the output current of the active rectifier to set the amplitude of the current consumed from the wind generator, while setting the value of the output curr ent of the rectifier is carried out in accordance with the calculated dependence of the power of the wind generator from its voltage. In the autonomous mode, the setting of the output current of the rectifier is formed by a regulator ensuring the stabilization of the voltage in the DC link. Developed: the structure of the converter control system with providing a power factor close to unity when working in parallel with the grid and providing work in an autonomous mode; determined the dependence of the power of the wind generator on its voltage from the condition of ensuring its maximum power; computer model of the system "converter with wind generator, grid and load". The solutions obtained are the basis for designing single-phase converters of com-bined power supply systems with wind generators.
Authors and Affiliations
A. А. SHAVELKIN, V. D. ZAKHARCHENKO
Keywords
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