HVDC Transmission Systems (0.9 CEUs)

Daily Schedule:

8:00am - Registration and coffee (1st day only)
8:30am - Session begins
4:30pm - Adjournment
The 2nd day of this course will run 8:30am-11:30am
This course will provide an in-depth overview of major HVDC system components; design and analyses of HVDC six and twelve-pulse valve group arrangements; principles of HVDC power system controls and protections; and harmonic characteristics in HVDC systems and filter design consideration.
HVDC transmission is a complicated engineering and design challenge. This is an ideal course for engineers new to HVDC transmission projects, regulatory staff that needs an overview to evaluate project options, and vendors and contractors that support utilities as they build new HVDC transmission systems.
High-voltage direct current (HVDC) transmission systems are becoming more and more important in an energy landscape that is characterized by long distance overhead transmission lines, buried cables or submarine cables. This is attributable to their advantages such as bulk power transmission with lower energy loss, interconnection of asynchronous networks, and enhance network stability with varying load dynamics. The objectives are to develop the knowledge and understanding of HVDC transmission and HVDC converters, and the applicability and advantage of HVDC transmission over conventional AC transmission.
Target Audience
The course is intended for those who do not work directly on HVDC converters such as supervisors, engineers, electricians, technicians and technologists, and also to those in the engineering and construction companies and manufacturers, wind project developers, consultants, and others who require an in-depth understanding of the various building blocks of HVDC including their applications and operations.
Upon successful completion of this course, the participants will have reliably demonstrated the ability to:
  • Understand the basics of HVDC transmission, its applicability and benefits of HVDC transmission over conventional AC transmission
  • Able to differentiate operating principles between rectifiers, converters and inverters in six and twelve-pulse valve group arrangements using semi-conductors
  • Know DC link control for HVDC systems and use it to regulate power flows through the DC link
  • Use the knowledge in harmonics to analyze harmonics coming from the AC and DC sides of the converter station and design appropriate filters
  • Understand the nature of faults on both AC and DC sides of the converters and devise protection schemes
  • Understand construction and characteristics of HVDC overhead transmission lines, land and submarine cables and know when and where to apply them
  • Analyze steady-state behavior of small-size HVDC transmission network systems using Siemens/PTI PSS/E Power Flows software tool, and
  • Pursue a career in HVDC systems operation, planning, and design, and/or conduct post-graduate research on HVDC systems.
Material(s) Required
“Design, Control, and Application of Modular Multilevel Converters for HVDC Transmission Systems” 
By: Kamran Sharifabadi, Lennart Harnefors, Hans-Peter Nee, Staffan Norrga and Remus Teodorescu.
Vendor: Wiley
Edition: 1st, Kindle Edition
Note: For reference only. Some topics are from published papers. 

Mike Dang

Michael D. N. Dang obtained his B.Sc. (Hon.) in 1968, M.Sc. in 1969 and Ph.D. in 1972 all in
Electrical Engineering from the University of Manchester Institute of Science & Technology,
England. He worked for the Central Electricity Generating Board in London before immigrating
to Montreal in 1981 and joining Shawnigan Consultants Inc. He came to Toronto and joined
Ontario Hydro/Hydro One Networks Inc. in 1988. He retired from Hydro One in June 2013 and
joined McMaster University and Mohawk College, teaching five courses in Power System
Engineering. Today, he teaches only Power Systems Quality at McMaster University. His major
study areas included power system analyses, power transmission and distribution, power
systems protection, power systems quality, and system operations and connections of
combined-cycle and wind-turbine generation to the Grid. He has published 18 technical papers
to date.
Dr. Dang is a registered professional engineer in the Province of Ontario, a Fellow Engineers
Canada and a member of the Experience Requirement Committee of Professional Engineers
Ontario. His other activities include being a Secretary-Treasurer and member of the Board of
Directors, Multicultural Historical Society; Financial Secretary, Knights of Columbus, St. Andre
Bessette Parish; and Scholarship Judge on the Jean Lumb Foundation.
Day 1 (a.m.)
Introduction to HVDC: HVDC projects around the world and its history; Six different types of HVDC links; Components of an HVDC transmission system; Choices for HVDC DC over AC systems; Advantages, disadvantages and limitations in HVDC transmission; Comparing AC vs DC electrical network systems; Economics of HVDC transmission; HVDC projects used as illustrations
Day 1 (a.m.)
Rectifiers, Converters and Inverters: Defining differences between rectifiers, converters and inverters; Diodes, mercury-arc valves, power thyristors and Insular-Gate-Bipolar Thyristors (IGBT) – their characteristics and uses in bridge rectification; Comparison of power semi-conductors; Introducing current and voltage-source converters –
their characteristics and applications; Thyristor and IGBT valve arrangements in a converter station.
Day 1 (p.m.)
Harmonics and Filters in HVDC Systems: Harmonics due to HVDC transmission; Harmonics from the AC and DC sides of the converter station; Total Harmonic Distortion (THD) values for different types of converters; AC and DC filters in HVDC – design criteria, harmonic limits, quality factors, damping factors; single-tuned, double-tuned and high-pass filters; Active DC filters and their applications.
Day 1 (p.m.)
Operation and Control of HVDC Systems: Objectives and principal tasks in HVDC control; Basic principles in HVDC control – Overlap Angle μ, Firing Angle α, and Extinction Angle γ; HVDC control characteristics – Normal control, Inverter control, Power reversal control, Voltage reduction control, Angles (α and γ) control, DC current and voltage controls, Active and reactive power controls, Transient stability control, On-tap changer control and Power-frequency control; HVDC system faults consisting of: converter faults, arc-through faults, misfire faults, extinction current, short-circuit in a rectifier bridge, commutation failure, and loss of DC line.
Day 2 (a.m.)
HVDC Transmission System Protection: HVDC protection system protection requirement; AC Line protection; Converter transformer protection; Thyristor valve protection that includes: thyristor over-voltage protection, High dV/dt and dI/dt protection, thyristor gate-firing protection, thyristor valve-cooling protection, thyristor junction-temperature protection, thyristor low current and redundancy protection, thyristor valve protection and DC pole protection; DC line and cable protection; Harmonic filter protection; Resistor, reactor and capacitor bank protection in filters; Communication between converter stations.
Day 2 (a.m.)
Major Components of HVDC Transmission Systems: Roles of converter transformers – design parameters and characteristics; Test procedures needed to prepare converter transformers for service; IEC/IEEE Codes and Standards; Essential components of HVDC overhead transmission lines - tower structure, tower configuration and circuit configuration, Right-of-way (ROW) of overhead HVDC transmission lines and cables; Designing tower heights and ROW widths; Different types of insulators used in HVDC transmission; Land and submarine cables at different ratings and voltages including
different cable types and cable arrangement layouts; HVDC Light transmission, their characteristics and applications.

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