THE IMPACT OF AUTOMATION AND CONTROL ON A DISTRIBUTION SYSTEM
- 주제(키워드) Automation and Control , Distribution System , Hierarchical Coordinate Control , Photovoltaic Generation
- 발행기관 아주대학교
- 지도교수 Jung Jae Sung
- 발행년도 2019
- 학위수여년월 2019. 2
- 학위명 석사
- 학과 국제대학원 융합에너지학과
- 실제URI http://www.dcollection.net/handler/ajou/000000028234
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Review of several professional and scholarly sources reveal an increasing trend for many electric utilities to seek greater improvements in the reliability and power quality on the distribution network. Such improvements are required to meet the dynamic needs of modern consumers, as well as to facilitate integration of more dynamic elements on the grid such as distributed generation like rooftop solar PV. Also taken into consideration, are the concerns of the utility regulators, who set targets for these parameters (power quality and reliability) and incentivise compliance for the benefit of the industry. A cost-effective approach implemented by these utilities has been the installation of automation and control devices and software. To date, the installation of these systems has proven to be very useful in improving the quality of the power output on the distribution system compared to its basic state while enhancing its ability to operate on its own acting as the local control. However, analyses conducted in the present study reveal that the local control presents less optimal results in meeting the primary objectives of 1) improving the average voltage on the distribution system to approximately 1 P.U, 2) decreasing the number of violations recorded on the system and 3) minimizing power loss. This deficiency of the local control was determined by simulating a typical distribution feeder, a modified IEEE 123 feeder circuit, and considering the effects of incorporating solar PV generation on the circuit. This paper proposes a hierarchical coordinate control approach to improving the performance of a distribution feeder circuit with and without integrated photovoltaic (PV) generation. The control devices considered are the on-load tap (OLTC) transformer, Shunt capacitors and Voltage regulators. The simulation results indicate that the use of hierarchical coordinate control is preferable to basic local control methodology for improving the overall average voltage, reducing violations as well as reducing power losses on the network.
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ACKNOWLEDGEMENT
ABSTRACT i
LIST OF ABBREVIATIONS iii
Chapter 1. INTRODUCTION 1
1.1 Research Motivation 1
1.2 Research Problem 3
1.2.1 Problem Statement 4
1.3 Research Objectives and Scope 5
1.4 Research Process and Methodology 6
Chapter 2. PRELIMINARY STUDIES 7
2.1 Context of Study and Current trends 7
2.2 Control devices (OLTC, Shunt capacitor, Voltage regulator) 8
2.2.1 The OLTC 8
2.2.2 The Capacitor 10
2.2.3 The Voltage Regulator 11
2.3 PV impact 12
2.4 Losses impact 13
2.5 Coordinate control potential -The methods that exists 13
Chapter 3. METHODOLOGY 16
3.1 The Software 16
3.2 System Model 17
3.3 Hierarchical Coordinate Control Algorithm 18
3.4 Objective functions and Constraints 20
3.4.1 Scenario 1 20
3.4.2 Scenario 2 22
3.5 The Local Control 23
3.6 Limitation 23
Chapter 4. RESULTS AND INTERPRETATION 25
4.1 The Inputs and Results 25
4.1.1 The Modified Circuit- 25
4.1.2 Input 28
4.1.3 Results – Scenario 1 32
4.1.4 Results – Scenario 2 38
Chapter 5. CONCLUSSION AND FUTURE WORK 40
5.1.1 Summary 40
5.1.2 Conclusion 41
5.1.3 Future Work 41
BIBLIOGRAPHY 42
