Assuage of Voltage Swell and Sag problems with UPQC Based on Adaptive Multi Converter for the Enhancement of Power Quality at Fault and Dynamic Load Condition.

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Assuage of Voltage Swell and Sag problems with UPQC Based on

Adaptive Multi Converter for the Enhancement of Power Quality at

Fault and Dynamic Load Condition

MASTER THESIS

Organized to Meet a Part of the Requirements to Achieve the Master Degree of

Mechanical Engineering Department / Specialization of Electrical Engineering

for Renewable Energy

By

MOHAMED .A. FARAG

S951302506

MECHANICAL ENGINEERING DEPARTMENT

POSTGRADUATE PROGRAM

SEBELAS MARET UNIVERSITY

SURAKARTA

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ABSTRACT

With the continuous outstanding development of electronic devices, the power quality problems have been remarked as a great growing concern, whereas voltage sag and swell problem are the most frequently occurring and detrimental power quality problems. Therefore, the purpose of this study was to mitigate voltage sag and swell problem with UPQC using proposed adaptive multi converter (AMC). The proposed device was implemented during generating voltage sag and swell problem in electronic appliance. The quick response view of AMC-UPQC power distribution system with regard to reactive power was illustrated at 0.02 sec. The results showed that the developed converter was capable to compensate the voltage sag problem by 99.72%, 96.24%, 94.45% and the voltage swell by 93.33%, 83.33%, 77.27% at 1-phase, 2-1-phase, and 3-1-phase, respectively. Besides, it can combat the dynamic load significantly, 87.06 % and 75 % at voltage sag and swell condition respectively. The unique feature of AMC-UPQC is the rate of potentiality of voltage sag /swell mitigation notably higher compared to conventional UPQC as adaptive multi converter responses on account of reactive power quickly and timely. As a result, the developed power distribution system was substantiated as a proficient compensator for the reactive power requirement of the load and in future it can be used as a fancy power distribution system for the protection of dynamic load.

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2.5 Unified Power Quality Conditioner (UPQC) ... 10

CHAPTER III RESEARCH METHOD ... 14

3.1 Contribution ... 14

3.2 Adaptive Multi-converter ... 17

3.3 Flowchart of Adaptive Multi-Converter (AMC) ... 19

3.4 Flow Chart of the Research Methodology ... 21

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CHAPTER IV RESULT AND ANALYSIS ... 23

4.1 Results and Discussion ... 23

4.2 Comparison scenario of assuage voltage sag and swell at different phase ... 28

4.3 Comparison the response view of AMC UPQC system at different phase ... 31

CHAPTER V CONCLUSION ... 36

5.1 Conclusion ... 36

5.2 Suggestion ... 36

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Faultless Phase and the Faulted Phase During an SLG Fault. ... 10

Figure 2.4 Typical Multi-UPQC Used in a Distribution System ... 12

Figure 3.1 Simulink Model for UPQC with Adaptive Multi Converter ... 14

Figure 3.2 Flowchart Adaptive Multi-Converter (AMC) ... 19

Figure 3.3 Flow chart of the research ... 21

Figure 4.1 Voltage sags at one-phase fault scenario with and without Adaptive multi converter ... 23

Figure 4.2 Voltage sags at two-phase fault scenario with and without Adaptive multi converter ... 24

Figure 4.3 Voltage sags at three-phase fault scenario with and without Adaptive multi converter ... 25

Figure 4.4 Voltage swell at one-phase fault scenario with and without Adaptive multi converter ... 26

Figure 4.5 Voltage swell at two-phase fault scenario with and without Adaptive multi converter ... 27

Figure 4.6 Voltage swell at three-phase fault scenario with and without Adaptive multi converter ... 28

Figure 4.7 Comparison view of mitigating voltage sag applying with and without AMC at different phase ... 29

Figure 4.8 Comparison view of mitigating voltage swell applying with and without AMC at different phase ... 30

Figure 4.9 Voltage sag at three phase dynamic load scenario with and without Adaptive multi converter ... 30

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Figure 4.11 Quick response view of AMC UPQC system generating voltage

sag condition at one phase (A), two-phase (B) and three-phase

(C) ... 32

Figure 4.12 Quick response view of AMC UPQC system generating voltage

swell condition at one-phase (A), two-phase (B) and three-phase

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TABLE LIST

Table 2.1 Resume of Previous Research ... 13