INTRODUCTION OF POWER TRADING VIETNAM CHINA BY 220kV …

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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

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2

Trading and operating issues 3

Hanoi

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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

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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%

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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

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Need of electricity importing from China

Add more reasonable power sources

Improve efficiency of energy business

Hanoi

Improve power

Voltage

Power supply reliability

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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 !