2. Brief on HVDC 2015 Brief on HVDC 2015
Nowadays, the global projects and researches in HVDC are very actively planned and
launched especially in EU, China, India and Brazil.
• Promoting the current technical and policy making issues, a lot of discussion and
technical meetings for HVDC have been challenged for the new perspective in HVDC
world.
• However, three main topics such as HVDC Application in Power Grid, HVDC Converter
Station and Power Equipments for HVDC System are discussed separately in one
way or another.
• Therefore, we have been spending the enormous efforts to grasp the total strategic
solutions and technical information on HVDC projects.
• In this context, HVDC 2015 has been organized to provide the collective strategic and
technical information for the policy making staffs as well as technical engineers in
the major three topics - Power Grid, Converter and Power Equipments – and further to
take the initial step for Super Grid in North East Asia (China-Korea-Japan-Russia).

3. Main and Sub Topics of HVDC 2015
I. HVDC Application on Power Grid
1) Analysis of AC/DC Power System
2) Planning and Operation of HVDCs in Transmission Networks
3) HVDCs for Renewable Power and Micro Grid
4) Application of DC Innovative Technology: DC Grid and DC Distribution
5) Experience from Practical HVDC Application
6) Other HVDC Power Grid Related Topics
II. HVDC Converter Station
1) Novel Technology of VSC and CSC for HVDC Transmission
2) Network Topology of HVDC Converters for Off-shore Wind Farm Power Plant
3) Construction and Operation Aspects on HVDC Converter Station
4) Novel Circuit Topology and Control Circuit for HVDC Converter Operation
5) Universal Transformer for DC Distribution Networks
6) Other HVDC Converter Related Topics
III. Power Equipments for HVDC System
1) HVDC Converter Transformer
  2) AC/DC Filter and Reactive Power Compensating Equipments for HVDC System
3) HVDC GIS and Circuit Breaker
4) HVDC Series Reactor and Parallel Capacitor
5) HVDC Transmission Line (Overhead, Underground and Submarine Cable)
6) HVDC Insulation Coordination
7) Other HVDC related Equipments (HVDC Lightning Arrester, Insulator and so forth ....)

4. Main and Sub Topics of HVDC 2015
IV. Promotion Status and Future Plans of the North-East Asia Super Grid
1) Promotion Status and prospect s of Super Grid business in Europe
2) Super Grid Operation Experience between European Nations
3) Outline and Benefits of Super Grid
4) Prospects of Super Grid Market Volume
5) Status of the North-East Asia Super Grid
6) Technical Feasibility of Super Grid business in the North-East Asia
7) Economic/Legal Analysis of Super Grid business in the North-East Asia
8) Plan for Establishing the North- East Super Grid of KEPCO

5. Current Status of Power System in Korea
Generation
Transmission &
Distribution
Sales
Capacity: 82,527MW
GENCO(Subsidiaries)
: 69,187MW(84%)
Generation Source
Transmission: 31,662c-km
Substation: 264,373MVA
Line Length(c-km)
Customers: 20 million
Sales Volume: 466,592GWh
Sales Percentage
11.6%
25.1%
765kV
345kV
Below
154kV
6.1%
835
Residential(14%)
29.1%
28.3%
8,770
Public & Service (30.7%)
22,017
Industrial (55.3%)
• Other include renewable energy
(About 1.7%)

6. Include HVDC(DC180kV) submarine cable of 231c-km
Transmission & Distribution Facilities
(As of Dec 31, 2012)
Line Length 31,663 c-km
Include HVDC(DC180kV) submarine cable of 231c-km
Transmission
Line Length 442,641 c-km
Distribution
Voltage
No. of S/S [T]
No. of P.tr [D]
Capacity
[MVA] T
765kV 6
29,116
345kV 91
111,597
154kV
644
123,226
66kV 8
434
Total
749
264,373 D
22.9kV
(P.tr) 2,005,113
102,582

7. High Capacity HVDC Application
Needs for High Capacity HVDC
Power system operation aspect
The level of fault current in metropolitan area is increased up to the limit.
HVDC could increase power system stability
Difficulty of 765kV AC line construction
765kV AC T/L  Long construction period (severe public complaints)
Lower land cost for HVDC T/L than one of HVAC
Mitigate the issue of T/L construction

8. Continuously Increasing Power Demand
Jeju Island HVDC
Needs for HVDC in Jeju #3
Isolated network
 2.5 times of mainland’s cost
High Generating Cost
• One of the most popular tourist place
• Over 10% growth/year for last 20 years
Continuously Increasing Power Demand
Project
Capacity
Status
#1 HVDC
300MW
Existing
#2 HVDC
400MW
#3 HVDC
200MW
Plan Confirmed
(Completion 2017)

9. Off shore Wind Farms Connection Pyeongtaek -Dangjin PtP HVDC
HVDC Construction Plan (Confirmed)
• 1st and 2nd Stage : 345kV AC (2011~2016)
- 345kV transmission line 22km, 500MW
• 3rd Stage : 500kV HVDC (2017~2019)
- Two PtP converter station(2GW) : Offshore, Land
- Overhead and Cable Transmission Line 80km, 2GW
Off shore Wind Farms Connection
• Objective : Increase transmission capacity,
reduce fault current
• Installed facilities : PtP converter station(1.5GW x 2)
• Completion : June. 2018(1st), June. 2021(2nd)
Pyeongtaek -Dangjin PtP HVDC

10. Possible HVDC Application in Korea
BTB: Back to Back (Frequency Conversion)
PTP: Point to Point (Long Distance T/L)
BTB type
• Frequency Converter
• Separation of AC networks
 3 to 4 Projects for the Seoul Area and
South-North Korea connection
PTP type 1
• Long Distance Power Transmission
 2 to 5 Projects for the replacement of
AC 765kV and 345kV
PTP type 2
• Submarine cable Transmission
 2 to 3 Projects for the Jeju and
Mainland connection
 3 Projects between Korea and Russia,
Japan, China

11. Super Grid in North East Asia (China-Korea-Japan-Russia)
HVDC
Wind
Power Plant
Customer
Russia
North Korea
Korea
China
Japan

12. Thank You