introduction of power trading vietnam china by 220kv …
TRANSCRIPT
1
INTRODUCTION OF POWER TRADING
VIETNAM – CHINA BY 220kV LINES
HANOI 04/2014
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Contents:
Overview
Electricity import from China by 220kV Overhead line
1
2
Trading and operating issues 3
Hanoi
3
Overview of Vietnam Northern power grid
Power grid
Supply for 28 provinces in the North
Voltage levels:
500, 220, 110, 35, 22, 10, 6, 0.4kV
Voltage
(kV)
No. of
Substation
Installed
capacity
(MVA)
Total of
lines length
(km)
500kV 7 6750 2150
220kV 32 11750 5800
110kV 263 16120 7950
4
Overview of Vietnam Northern power grid
Load
Hanoi
Year Capacity max
(MW)
Production
( bil. kWh)
2011 6700 39.3
2012 7760 43.5
2013 8000 47.5
Load growth rate:
Pmax = 10-13%; A = 11-14%
5
Overview of Vietnam Northern power grid
Generation mix
Hanoi
* Total installed capacity
(including EVN and IPP): 10147 MW
Rate: Hydro 53%, thermal 47%.
* Import from China:
Year of 2012: Pmax = 800MW;
Amax = 14 mil. kWh/day
Year of 2013: Pmax = 1100MW;
Amax = 18 mil. kWh/day
* Received from Southern grid:
1500 MW- 1800 MW
Overview of Vietnam Northern power grid
Cam Pha 2x330 MW
Quang Ninh 2x300 MW
Pha lai 4x110 + 2x300 MW
Ninh Binh 4x25 MW
Uong Bi 50 + 55 MW
Na Duong 2x55 MW
Cao Ngan 2x57.5 MW
Hoa Binh 8x240 MW
Tuyen Quang 3x114 MW
Thac Ba 3x36 MW
: Hydro PP
: Coal fired PP
Son La 6x400 MW
Hai Phong 2x300 MW
Ban Ve 2x160 MW
Cua Dat 2x48.5 MW
Son Dong 2x110 MW
Mao Khe 2x220 MW
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500kV North-South interconnection
NHO QUAN
~
Northern
Southern
Central
HA TINH DA NANG PLEIKU PHU LAM
IALY
TAN ĐINH
O MON
PHU MY
~
P. MY 3 P. MY 22 P. MY 4
IALY
HOA BiNH
~ ~
NHA BE
THUONG TIN
~
~
DI LINH
From China 900 MW
To Cambodia
100 MW
8000 MW
2600 MW
9000 MW
QUANG NINH SON LA
HIEP HOA
8
Need of electricity importing from China
Add more reasonable power sources
Improve efficiency of energy business
Hanoi
Improve power
Voltage
Power supply reliability
9
Import projects
There are five import projects
Hanoi
3 projects by 110kV OVL
Ha Khau-Lao Cai
Maomaotien-Ha Giang
Tham Cau-Mong Cai
2 projects by 220kV OVL
Xinqiao-Lao Cai
Maguan – Ha Giang
(now became Malutang-Ha Giang)
A contract between:
YNPG – NPC
Dispatching Contact:
Hong Ha – Lao Cai
Pmax: 95 MW
Pmin: 25 MW
Amax: 1.65 mil.
kWh/day
Scope of power supply:
2 provinces:
Lao Cai
Lai Chau
He – Lao 110kV Power Interconnection Project
25/9/2004
Lao
Cai
2-4
1-7 1-9
1-10
Hekou
1-4 Xin-Lao
Project
Mao-He
Project
1-12
1-11
1-8
Mao – He 110kV Power Interconnection Project
Maomaotiao
Ha
Giang
1-1
1-4
1-2
1-5
Ma-He
Project or
National PS
A contract between:
YNPG – NPC
Dispatching Contact:
Van Son – Ha Giang
Pmax: 110 MW
Pmin: 40 MW
Amax: 2.1 mil. kWh/day
Scope of power supply:
2 provinces:
Ha Giang
Tuyen Quang (partly)
2-4
1-7
Xin-Lao
Project
He-Lao
Project
28/6/2005
1-3
Shen – Mang 110kV Power Interconnection Project
A contract between:
GXPG – PC1 (NPC)
Dispatching Contact:
Dong Hung – Quang Ninh
Pmax: 25 MW
Pmin: 7 MW
Amax: 0.4 mil. kWh/day
Scope of power supply:
Mong Cai substation
Mong Cai 1-14 1-13
Shengou 20/4/2005
Vietnamese
National
Power
System
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Power importing by 220kV Xinqiao-Lào Cai
Start time: 26/09/2006
General informations
U Xinqiao = 230 ± 5kV
(U min = 230kV at peak hours)
Meters at two end
Fined when power transmission exceed 10% of
approved number or cosφ less than 0.9
No. Year 2009 2010 2011 2012 2013
1 P max (MW) 400 400 450 490 540
2 Annual import (bil. kWh) - 2.49 2.09 1.05 1.90
A contract between:
YNPG – EVN
Dispatching contact:
YEPDC - NRLDC
Pmax: 450-460 MW
Pmin: 140-150 MW
Amax: 10.5 mil. kWh/day
Aavg: 7.5 mil. kWh/day
Scope of power supply:
5 provinces:
Lao Cai
Yen Bai
Viet Tri
Phu Tho
Vinh Phuc
SVC C
C
Xin – Lao 220kV Power Trading Project
Xinqiao
220kV
Lao Cai
220kV
A
220kV
B
220kV
C
220kV
~
2-5 2-6
2-13 2-12 2-10
2-11
Laojie
2-20
2-18
2-15
2-19
2-14
2-24
2-22 2-21
2-16 2-17
2-4
2-3
2-2 2-1
Hekou Maomaotiao
Hejiang
1-1
1-4
1-2
1-3
Ma-He Project or National PS
C
84 km
135 km
67 km
40 km
2-7 2-8
26/09/2006
2-9
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Power importing by 220kV Malutang-Hà Giang
Started time: 23/04/2007
General information
U Malutang = 222 - 235kV
Meters at two end
Fined when power transmission exceed 10% of
approved number or cosφ less than 0.9
No. Year 2009 2010 2011 2012 2013
1 P max (MW) 220 220 350 290 350
2 Annual import (bil. kWh) - 2.02 1.87 0.93 1.40
SVC
C C
Ma – He 220kV Power Trading Project
Malutang
220kV
Ha Giang
220kV
D
220kV
E
220kV
Laojie
2-41
2-40
1-6 1-5
Hekou Maomaotiao
Hejiang
1-1
1-4
1-2
1-3
T4
2-37
2039
T4
T3 2-30 2-31 2-32
2-33 2-34
2-38
2-36 2-35
2-29
~
2-27
1-7
2-4
Xin-Lao Project
C
268 km
228 km
38 km
A contract between:
YNPG – EVN
Dispatching contact:
YEPDC - NRLDC
Pmax: 380-400 MW
Pmin: 160-170 MW
Amax: 8.3 mil. kWh/day
Aavg: 6.5 mil. kWh/day
Scope of power supply:
4 provinces:
Thai Nguyen
Cao Bang
Bac Kan
Tuyen Quang (partly)
23/04/2007
2-25
2-26 2-28
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Procedure “Planning and operating of power importing from
China by 220kV OVL”
Yearly, monthly basic grid diagram
Responsible for : NLDC
Time: before the 15th every month
Monthly power and capacity registration
Responsible for : EPTC
Time :
before 17th every month, submit to EVN
before 20th every month, send to YNIC
before 25th every month, inform NLDC, EVNNPC, NPT
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Procedure “Planning and operating of power importing from
China by 220kV OVL”
Registration of grid maintenance plan
Responsible for : EVNNPC and NPT
Time:
before the 10th every month, send to NLDC the
maintenance plan for the next 3 months
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Dispatching aggreement
Co-operation units :
- Vietnam side : NRLDC
- China side: YNDC (YNPG)
Equipment management:
- Line management right differentiated by territory
Operation mode :
- Isolated from Vietnamese grid
- Isolated from other Chinese grid
Build specific forms and procedures for
maintenance registration and outage handling
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Advantages and Disadvantages in operation of grid
supplied from China
Advantages :
- Power supply from China is quite stable
- Outage probability low
- Closely and frequent collaboration between two
dispatching units
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Advantages and Disadvantages in operation of grid
supplied from China
Disadvantages:
- Supply by tie-line with long distance
- Low voltage at downstream at high load
- Destabilize easily when the 220kV connection line
tripped
- Difficult to control the output registered by the strong
development of small and medium hydro power plant.
Especially at the period between the dry and rainy
seasons
- Industrial load at downstream may cause voltage
fluctuations
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Q & A
Thanks for your attention !