KOLB Andrii
Study the system of electric power quality control based on AVI with PWM in the systems of group feed of electromechanics with the direct-current unibus.
The studies were carried out by modeling a power quality management system based on p-q instant energy theory using generalized vectors of current and voltage in the system of coordinates x, y, which rotates synchronously focused on vector voltage.
The multi-functional speed quality management systems in electric drives with capacitive storage, which allow to compensate inactive components of power and stabilize the voltage, based on AVI with PWM can be built.
High precision and maximum possible action of quality management electricity system is achieved, for a given energy resources, by using relay regulators and by formation of the current control parameter for the instantaneous value of power.
In three-phase symmetrical system of sinusoidal quantities generalized vectors in the plane of complex variable are represented by a vector, which rotates uniformly with angular frequency voltage.
From the results of the study follows that the proposed system compensates inactive components of the full power, practically without delay and with high precision, in case of practically sinusoidal current network. This is because currents that are needed to be compensated are used as the current tasks of relay regulators allocated without delay for the instantaneous value of power. Thus, we achieve the maximum possible performance of the automatic adjustment of power quality for a given power constraints
Keywords: electric power quality, energy saving, capacitive storage, electromechanics with the direct-current unibus