Modeling and control of VSC-HVDC systems

Other Title(s)

التحكم بأنظمة الجهد العالي المباشر متعددة الأطراف المبنية على أساس محولات مصدر الجهد، و نمذجتها

Dissertant

al-Zahlan, Mustafa Walid Ali

Thesis advisor

al-Awasa, Khalid Muhammad
al-Majali, Husayn Diyab

University

Princess Sumaya University for Technology

Faculty

King Abdullah II Faculty of Engineering

Department

Department of Electrical Engineering

University Country

Jordan

Degree

Master

Degree Date

2019

English Abstract

With the ever increased installed capacity of renewable energy power plants, new challenges come to the front. Among the most popular renewable resources in Western Europe countries is the offshore wind energy. The offshore wind energy is characterized by its availability, stability, and its lower intermittency. The integration of such renewable plants directly to the grid faces many challenges; among them the location of these power plants, the difficulty in synchronizing a large number of wind turbines together, and the higher cost of connecting cables. Multi-terminal VSC-HVDC transmission system represents the promising architecture that permits the integration of such renewable power plants as well as the unsynchronized electric grids. The complete dynamic model of the multi-terminal VSCHVDC transmission system, based on the two-level voltage source converter, is derived in the first part of the thesis. The model’s dynamic equations have been analyzed and classified based on their roles in shaping the overall dynamic behavior of the system. The second part is dedicated to designing, analyzing, tuning, and testing of the control system that governs the operation of the VSC-HVDC systems. The designed control system includes the design of the inner current controller and the outer control loops. Three types of current controllers have been built— frame PI, frame PR, and frame hysteresis controllers. The performance of each of the controllers mentioned above is evaluated in the case of connecting the VSC to weak AC grid. The current controllers have been optimally tuned using both analytical and evolutionary stochastic algorithms, and the results were assessed based on four metrics criteria; these include the rising time, the settling time, the percentage overshoot and the steady-state fluctuations. The outer control loops, of various types of AC grids, performance has been analyzed, and the effect of the filtration capacitance on the dynamic behavior of the outer controllers is examined and explained. The simulation tests have been conducted on Matlab/Simulink platform and the simulation results are compared with their counterparts in the literature. The results show that the traditionally used analytical methods for tuning the controllers yield to responses that suffer from high steady-state fluctuations. In addition to that, the ability to retune these controllers in a manner to suppress these fluctuations has been proved.

Main Topic

Electronic engineering

No. of Pages

192

Table of Contents

Table of contents.

Abstract.

Abstract in Arabic.

Chapter One : Introduction.

Chapter Two : Literature review.

Chapter Three : Design, modeling, and analysis of VSC-HVDC transmission system.

Chapter Four : Control of multi-terminal VSC-HVDC transmission system.

Chapter Five : Simulation studies results and discussion.

Chapter Six : Conclusions and future work.

References.

American Psychological Association (APA)

al-Zahlan, Mustafa Walid Ali. (2019). Modeling and control of VSC-HVDC systems. (Master's theses Theses and Dissertations Master). Princess Sumaya University for Technology, Jordan
https://search.emarefa.net/detail/BIM-890496

Modern Language Association (MLA)

al-Zahlan, Mustafa Walid Ali. Modeling and control of VSC-HVDC systems. (Master's theses Theses and Dissertations Master). Princess Sumaya University for Technology. (2019).
https://search.emarefa.net/detail/BIM-890496

American Medical Association (AMA)

al-Zahlan, Mustafa Walid Ali. (2019). Modeling and control of VSC-HVDC systems. (Master's theses Theses and Dissertations Master). Princess Sumaya University for Technology, Jordan
https://search.emarefa.net/detail/BIM-890496

Language

English

Data Type

Arab Theses

Record ID

BIM-890496