Development of Harmonic Voltage Emission Limits Calculation in MV Distribution System
- 주제(키워드) Power System , Power Quality , Harmonics Distortion
- 주제(DDC) 621.042
- 발행기관 아주대학교
- 지도교수 Jaesung Jung
- 발행년도 2023
- 학위수여년월 2023. 8
- 학위명 석사
- 학과 및 전공 일반대학원 에너지시스템학과
- 실제URI http://www.dcollection.net/handler/ajou/000000032882
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
The power system has undergone significant transformations in recent years, including the rise in renewable energy-based power generation. However, the use of nonlinear switching components like semiconductors has led to an increase in harmonic distortion, which has become a concern for power system engineers. Compliance with the IEC 61000-3-6 and IEEE 519 standards can help mitigate this issue. Nevertheless, the accuracy of the methods used to calculate harmonic distortion emission limits is a concern in many countries. To address this concern, this thesis proposes a new method for calculating harmonic distortion emissions, which can be implemented in complex network topologies such as radial, multi-feeder with a spur, and weakly meshed. The proposed method utilizes the topological characteristics of distribution systems, which can accurately calculate harmonic distortion emissions without many assumptions. Then, a comparison was conducted between the proposed method and the IEC 61000-3-6 and IEEE 519 standards to examine their accuracy in determining Harmonic Current Emission Limits (HCEL). The study findings indicate that the proposed method is viable and practical, and it can complement the IEC 61000-3-6 standard. Furthermore, the proposed method can provide accurate results in complex network topologies, which were not covered by the existing standards. In summary, the proposed method offers a practical solution to the problem of inaccurate calculation methods for harmonic distortion emission limits. The study findings indicate that the proposed method can accurately calculate harmonic distortion emissions, and it can be implemented in complex network topologies. The proposed method can complement the existing standards and strengthen the efforts to manage harmonic distortion in power systems.
more목차
I. Introduction 1
II. Basic Concepts 4
II.A. Principle of Harmonic Distortion Emission Limits 7
II.B. General Summation Law 8
II.C. Planning Levels 9
II.D. Global Contribution Value 10
III. Proposed Method 10
III.A. Harmonic Voltage Emission Limits 11
III.B. Allocation Constant 14
III.C. Influential Factor of Short-Circuit Power 20
III.D. Harmonic Current Emission Limits (HCEL) 21
III.E. Resulting Harmonic Voltage Set 21
IV. Application and Simulation Results 22
IV.A. Homogenous Study System 23
IV.B. Extreme Study System 25
IV.C. General Study System 27
IV.D. Weakly Meshed Distribution System 31
V. Conclusion 32
VI. Bibliography 34
