Abstract
Power Quality is an essential concern in the modern power system that can affect consumers and utility. The integration of renewable energy sources, smart grid systems and extensive use of power electronics equipment caused myriad problems in the modern electric power system. Current and voltage harmonics, voltage sag, and swell can damage the sensitive equipment. These devices are susceptible to input voltage variations created by interference with other parts of the system. Hence, in the modern age, with an increase in sensitive and expensive electronic equipment, power quality is essential for the power system's reliable and safe operation. Dynamic Voltage Restorer (DVR) is a potential Distribution Flexible AC Transmission System (D-FACTS) device widely adopted to surmount the problems of non-standard voltage, current, or frequency in the distribution grid. It injects voltages in the distribution line to maintain the voltage profile and assures constant load voltage. The simulations were conducted in MATLAB/Simulink to show the DVR-based proposed strategy's effectiveness to smooth the distorted voltage due to harmonics. A power system model with a programmable power source is used to include 3rd and 5th harmonics. The systems' response for load voltage is evaluated for with and without DVR scenarios. It has been noted that the proposed DVR based strategy has effectively managed the voltage distortion, and a smooth compensated load voltage was achieved. The load voltage THD percentage was approximately 18% and 23% with insertion 3rd and 5th harmonics in the supply voltage, respectively. The inclusion of the proposed DVR has reduced THD around less than 4% in both cases.
Highlights
Electrical Energy is invisible, a universal commodity that is immediately available in most of the world, and it has been recognized as everyday consumer need [1]
A Grasshopper Optimization Algorithm (GOA) based technique is recommended to tune the parameters of convention Proportional Integral Derivative (PID) controller
Dynamic Voltage Restorer (DVR) is proposed as the most noteworthy device to enhance the quality of power and proved to be a useful and well-performing device
Summary
Electrical Energy is invisible, a universal commodity that is immediately available in most of the world, and it has been recognized as everyday consumer need [1]. When the load voltage being disturbed, it causes voltage sag, transient, swell, and high distorted voltage with harmonics and Total Harmonic Distortion (THD) due to the occurrence of the faults. Few problems occur in the result of voltage sag that may cause disturbance of torques in the motors, device burning, misfiring in the device, etc. Voltage swell is defined as the increase in the voltage value from its fundamental value, e.g., during the half-cycle to 1-minute time, the change in voltage from 10 to 80 % It causes overvoltage when voltage sag, continued increasing voltage profile. When the connection of large loads being disturbed, it causes voltage swell. To decrease the THD lower than 5% by mitigating the problem of distorted voltage due to sags, swell or, harmonics. The mechanism, operating principle, and working of DVR are shown in section III; the simulation results are presented and discussed in section IV, and in last, a conclusion is drawn with a focus on the key findings of this work
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
