Review and Design of Voltage Sag Compensation Using Improved DVR System with Proportional Integral Controller

Abstract

The aim of this investigation is to remunerate voltage in
three-stage power systems during voltage sag conditions induced by
balanced and unsymmetrical deficiencies in power distribution
systems or offices in plants. Voltage plunges (also known as "voltage
sags") are abrupt drops in voltage size. Their definition is usually
anywhere between a couple of power-system recurrence trends and a
couple of moments. The popularity of voltage plunges stems
primarily from their effect on end-client hardware. Mechanical
processes can fail or shut down as a result of a voltage drop,
resulting in significant financial losses. Voltage drops are caused by
short-term changes in current, but voltage drops caused by short
circuits and earth faults are the most worrying for clients.
Recognizing problems in an electrical system until they cause
systemic damage is important for any power system. Consistent
control of energy quality is important to keep sensitive hardware
running accurately, as well as to minimise excessive power losses in
an energy system, which can lead to further benefit. A cost-effective
and adaptable solution to the stress slope is the Dynamic Voltage
Restore (DVR). The DVR is a power supply-based electronics system
which supplies a controllable voltage source with a voltage vector
(size and point) which increases source voltage to pre-definition
levels while restore the heap voltage. The DVR should protect the
whole plant against loads exceeding a certain MVA.