Voltage Regulation and Power Loss Minimization in Radial Distribution Systems via Reactive Power Injection and Distributed Generation Unit Placement

Abstract

Distributed Generation (DG) has become an essential part of the smart grids due to the widespread integration of renewable energy sources. Reactive power compensation is still one of most important research topics in smart grids. DG units can be used for reactive power compensation purposes, therefore we can improve the voltage profile and minimize power losses in order to improve the power quality. In this paper two methods will be used to accomplish the mentioned tasks; the first technique depends on the reactive power demand change of the proposed network loads, whereas the second technique uses an algorithm to control DG units according to the measured voltage values in the feeders to generate the needed reactive power. Both methods were applied to different scenarios of DG unit positions and different reactive power values of loads. The chosen DG unit is made up of a Type-4 wind farm which could be used as a general unit where it is able to control reactive power generation in a wider range separately from active power. The simulation results show that using these two methods, the voltage profile could be improved, power losses reduced and the power factor increased according to the placement of DG units.

Performance Improvements of Induction Motor Drive Supplied by Hybrid Wind and Storage Generation System Based on Mine Blast Algorithm

“…Most previous systems have proposed testing the system via step variations of normal or high induction motor rotor speed only [28,29]. To evaluate the system performance with the proposed controller, variations of low IM rotor speed test should be applied [30,31]. However, in the study, the system performance with the proposed controller is tested in case of low values of IM rotor speed.…”

Voltage Quality and Power Factor Improvement in Smart Grids Using Controlled DG Units

“…In [29], an optimized distributed control technique has been proposed relying on the sensitivity analysis of the distribution network and decentralized power regulation to improve voltage quality, and it was applied on a radial network. Meanwhile, another approach, which uses average changes of sending and receiving voltage in addition to voltage drop, has been proposed in [30] and it has been applied to a radial network.…”

Implementation of the Low-Voltage Ride-Through Curve after Considering Offshore Wind Farms Integrated into the Isolated Taiwan Power System

“…Consequently, the power system stability can be upset, leading to a sudden imbalance between power demand and power generation in the power supply system, a massive variation in the mains supply frequency, and even the collapse of the entire system [3,4]. Therefore, several studies have proposed to mitigate the power quality issues due to high penetration of renewable energy sources in electric grid systems [5][6][7][8]. In [5], two control techniques were used to different reactive power values of loads and varying scenarios of distributed generation unit positions in order to control the angle between the current and voltage for improving the voltage profile and reducing the power losses.…”

“…Therefore, several studies have proposed to mitigate the power quality issues due to high penetration of renewable energy sources in electric grid systems [5][6][7][8]. In [5], two control techniques were used to different reactive power values of loads and varying scenarios of distributed generation unit positions in order to control the angle between the current and voltage for improving the voltage profile and reducing the power losses. In [6], a useful emergency energy system was designed for Latakia city to ensure that the system would be steady and able to support most of the requirements of the city.…”