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. 2023 Jul 3;9(7):e17915.
doi: 10.1016/j.heliyon.2023.e17915. eCollection 2023 Jul.

Power quality improvement of a proposed grid-connected hybrid system by load flow analysis using static var compensator

Mohammad Nurul Absar  1 , Md Fokhrul Islam  1 , Ashik Ahmed  1
Affiliations

Power quality improvement of a proposed grid-connected hybrid system by load flow analysis using static var compensator

Mohammad Nurul Absar et al. Heliyon. .

Abstract

Renewable resources are most effective for sustainable development of society and economically efficient for small-scale power generation. However, grid integration is challenging because of the randomness of the source effects on power system parameters. This work proposes power quality enhancement by incorporating Static VAR Compensator (SVC) in a grid-integrated renewable hybrid power system. SVC is one of the shunt type Flexible AC Transmission Systems (FACTS) devices that is adopted in this system for the compensation of reactive power requirement. The proposed hybrid system for the Rohingya Refugee camp is energized by a wind and solar based sources. The objective is to enhance the overall bus voltage profile by minimizing both real and reactive power losses as well as boost the power transmission capability of the entire system. Different case studies have been considered by changing the source availability and generation supply for load flow analysis using ETAP software. Moreover, critical system parameters such as bus voltage, power transfer capacity, and power losses have been reported during the inactive time of one or both renewable sources. The results obtained without SVC have been compared against the ones with the presence of SVC. Our analysis reveals that, as a result of using SVC, the voltage profile improves by 2.9-3.3%, branch loss reduces by 2.1-2.4%, and power transfer capability enhances by 7.5-9 units.

Keywords: FACTS; Grid; Power quality; Renewable hybrid system; Rohingya refugee camp; SVC.

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Conflict of interest statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper

Figures

Fig. 1
Fig. 1
The equivalent circuit of the solar cell.
Fig. 2
Fig. 2
P–V curve of the solar panel.
Fig. 3
Fig. 3
I–V curve of the solar panel.
Fig. 4
Fig. 4
Basic construction of SVC [30].
Fig. 5
Fig. 5
Characteristic curve of SVC [30].
Fig. 6
Fig. 6
Single line diagram of proposed grid-connected PV-Wind renewable hybrid system using SVC.
Fig. 7
Fig. 7
Load flow analysis of scenario-1 when SVCs are inactive.
Fig. 8
Fig. 8
Load flow analysis of scenario-1 when SVCs are active.
Fig. 9
Fig. 9
Load flow analysis of scenario-2 when SVCs are inactive.
Fig. 10
Fig. 10
Load flow analysis of scenario-2 when SVCs are active.
Fig. 11
Fig. 11
Load flow analysis of scenario-3 when SVCs are inactive.
Fig. 12
Fig. 12
Load flow analysis of scenario-3 when SVCs are active.
Fig. 13
Fig. 13
Load flow analysis of scenario-4 when SVCs are inactive.
Fig. 14
Fig. 14
Load flow analysis of scenario-4 when SVCs are active.
Fig. 15
Fig. 15
Load flow analysis of scenario-5 when SVCs are inactive.
Fig. 16
Fig. 16
Load flow analysis of scenario-5 when SVCs are active.
Fig. 17
Fig. 17
Load flow analysis of scenario-6 when SVCs are inactive.
Fig. 18
Fig. 18
Load flow analysis of scenario-6 when SVCs are active.
Fig. 19
Fig. 19
Load flow analysis of scenario-7 when SVCs are inactive.
Fig. 20
Fig. 20
Load flow analysis of scenario-7 when SVCs are active.
Fig. 21
Fig. 21
Comparison of Voltage Profile (%) with & without SVC for each scenario.
Fig. 22
Fig. 22
Average voltage profile (%) Improvement of each scenario.
Fig. 23
Fig. 23
Comparison of average active power (kW) transfer capability with & without SVC for each scenario.
Fig. 24
Fig. 24
Enhancement of average power transfer of all scenarios.
Fig. 25
Fig. 25
Average branch losses (%) of all scenarios.
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