PT PLN (Persero)

Sarawak Energy Berhad

AORC-CIGRE TECHNICAL MEETING 16th to 21st August 2015

The Magellan Sutera Resort, Kota Kinabalu, Sabah, MALAYSIA

Outlines

Introduction

Location of the Project

Project Location

Mambong

Bengkayang

Sarawak

West Kalimantan

Serikin

275kV HVAC Transmission Line

128km

The Interconnection

150kV 275kV 275kV 132kV Siluas Serikin

K a l i m a n t a n - S a r a w a k

B o r d e r

West K a l i m ant an Sarawak

82.6km 45.6km

Bengkayang Mambong

K a l i m a n t a n - S a r a w a k

B o r d e r

201 Towers 144 Towers

Initially Power transfer

SEB to PLN

Power Transfer up to

In due course

Background

Kalimantan Power Exchange Agreement between SEB and PLN (PT PERSERO) on 5th

September 2012

Construction started

Expected to be completed by

Target operational by

Technical Specification of the Project

Description PLN SEB

Line Conductor

Conductor type/name

ACSR/AS Zebra ACSR Drake

No. and diameter of Al wire

54/3.18 26/4.44

No. and diameter of St wire

7/3.18 7/3.45

Overall diameter 28.62 mm 28.11 mm

Cross-section 428.9/55.6 mm² 402/65 mm²

Resistance (DC at 20°C)

0.065 Ω/km 0.072 Ω/km

Breaking load 137.8 kN 145 kN

Weight 1,621 kg/km 1,680 kg/km

Description PLN SEB

Tower Design Parameters

Tower height 50.4 m 35 to 37 m

Clearance open country 10.5 m 7.5 m

Clearance over plantations

7 m 4 m

Clearance to highway, roads

11 m 9 m

Clearance to other lines 5 m 4 m

Basic span 400 m 350 m

Insulators Cap and pin Cap and pin

Communication link OPGW OPGW

Surge arresters Class 3 Class 3

Cross arm – Cross arm >7.4m >6.8m

Cross arm – tower body ~6.9m ~6m

Conductor to ground Clearance

~15m ~10m

Right of way 15m on each side of

tower 20m on each side of

tower

Basic Substation Design Parameters Mambong Substation Bengkayang Substation

1. Number of bays required 2 (extension) 2 2. Bay type Line Line

3. Switchgear type Outdoor Outdoor (1½ circuit-breaker

scheme)

4. Environment Heavy Pollution Heavy Pollution

5. Busbar configuration Double Double 6. Busbar rating, A 2000 1600 7. Circuit breaker rating, A 2500 2500*

8. Circuit breaker short-circuit rating, kA 25 (3 sec.) 25 (3 sec.)

9. Busbar short-circuit rating, kA 25 (3 sec.) 25 (3 sec.)

10. Maximum voltage for equipment, kV 300 300

11. Short-duration power frequency withstand, kV

460 460

12.Basic SIL/LIL, kV 850/1050 850/1050

13.Minimum safety clearance, mm 4800 4800

14.Line reactor rating 3x5MVAr 3x5MVAr

15.Teaser reactor rating TBA –

Voltage/Capacity of Capacitor Banks

Mambong Substation

275kV 2×40MVAR 2×80MVAR

132kV 4×20MVAR

Milestone and Progress

Project Milestones at Sarawak

Overall Overall Progress Completion

Mambong Substation 78%

Mambong Transmission Lines 98%

Activity Expected Completion Date

Extension Works at Mambong 275/132kV Substation

Quarter 3, 2015

275kV Double Circuit Transmission Lines

Quarter 3, 2015

Piling works at capacitor bank bays

Cable Trench and Structure foundation

works

Equipment Installation

Line stringing works

Line Checking commence on 27th July

2015

Project Milestones at West Kalimantan

Overall Overall Progress Completion

Bengkayang Substation 85.46%

Transmission Lines 89.33%

Activity Expected Completion Date

Construction Works at Bengkayang 275/150kV Substation

July 2015

275kV Double Circuit Transmission Lines

July 2015

The Sarawak-West Kalimantan Interconnection

• Reduce generation cost for PLN West Kalimantan

• Improve security of supply for both SEB and PLN West Kalimantan

• Improve operational flexibility

• Catalyst for future potential interconnectors