reliability indices measurement - documents/reliability indices...bneri reliability indices...

Download Reliability Indices Measurement - Documents/Reliability Indices...BNERI Reliability Indices Measurement…

Post on 01-Apr-2019

220 views

Category:

Documents

1 download

Embed Size (px)

TRANSCRIPT

BNERI

Reliability Indices

Measurement Reliability Indices Measurement for three 11 kV

and 66 kV substations in Brunei Darussalam

(PWR 01)

NUR SABIQAH HAJI ROSLI

Draft dated 27th May 2015 i

ACKNOWLEDGEMENT

I would like to express my deepest appreciation to all those who provided me the possibility to complete

this report. I would also like to acknowledge with much appreciation the crucial role of Robinson Goh,

Hajah Zuriyati and Haziqah Nordin, the staff of Department of Electrical Services in the Distribution

Department, who provided their power outages and Single Line Network data to complete this Reliability

Indices Measurement project.

A special gratitude I give to our supervisor, Chief Researcher of Power Department, Dr. Arvind K S

Chaudhary, whose contribution in stimulating suggestions and words of encouragement helped me to

coordinate this project especially in writing this report.

Draft dated 27th May 2015 ii

EXECUTIVE SUMMARY

One of the Key Performance Indicators (KPI) under the Energy White Paper 2014 is to reduce the number

of power outages by 2035, which is in line with Wawasan 2035. Therefore, quantitative reliability

indices measurement such as System Average Interruption Duration Index (SAIDI) and System Average

Interruption Frequency Index (SAIFI) has been calculated for three 11 kV and 66 kV substations in

Brunei Darussalam.

In this study, IEEE Guide for Electric Power Distribution Reliability Indices (IEEE Std 1366-2012) is

used as the methodology and only unplanned and sustained interruptions are taken into account to provide

consistency in all four districts, to review and improve current reliability and performance of distribution

system in Brunei Darussalam. To further improve the performance of distribution system, design and

implementation of Smart Grid technologies can be utilized in Brunei Darussalam

Draft dated 27th May 2015 iii

Table of Contents

ACKNOWLEDGEMENT ............................................................................................................................. i

EXECUTIVE SUMMARY .......................................................................................................................... ii

1. INTRODUCTION .................................................................................................................................... 1

1.1 Scope of Work .................................................................................................................................... 1

2. ACRONYMS ............................................................................................................................................ 2

3. GLOSSARY ............................................................................................................................................. 3

4. POWER SYSTEM RELIABILITY .......................................................................................................... 4

4.1 Background ......................................................................................................................................... 4

4.2 SYSTEM AVERAGE INTERRUPTION DURATION INDEX (SAIDI) ......................................... 5

4.4 Distribution System ............................................................................................................................ 8

5. METHODOLOGY IEEE GUIDE ............................................................................................................ 9

5.1 Factors that cause variation in reported indices .................................................................................. 9

5.2 Outages that should not be taken into account when calculating indices ......................................... 10

5.3 Example of using MED definition to identify Major Event. ............................................................ 10

5.4 Sample System to calculate SAIDI and SAIFI with no MED .......................................................... 11

5.5 Catastrophic Days ............................................................................................................................. 12

5.6 List of data requested from DES for both 11 kV and 66 kV substations .......................................... 13

6. SYSTEM RELIABILITY CALCULATION FOR BRUNEI DARUSSALAM. .................................... 14

6.1 Step Restoration ................................................................................................................................ 14

6.2 Analysis of three 11 kV substations in Brunei Darussalam .............................................................. 17

6.2.1 SAIDI calculation for 11 kV substations ............................................................................ 18

6.2.2 SAIFI calculation for 11 kV substations ............................................................................. 22

6.3 Analysis of three 66 kV substations in Brunei Darussalam. ........................................................... 23

6.3.1 SAIDI calculation for 66 kV substations ................................................................................... 23

6.3.2 SAIFI ................................................................................................................................... 28

7. POWER OUTAGE ................................................................................................................................. 29

7.1 Causes of power outages. .................................................................................................................. 29

7.1.1 Weather related power outages. ..................................................................................................... 29

7.1.2 Faulty Equipment ........................................................................................................................... 30

7.1.3 Overcurrent .................................................................................................................................... 30

7.1.4 Flashover transformer .................................................................................................................... 30

7.1.5 Animal Contacts ............................................................................................................................. 30

7.1.6 People induced including: pole and overhead contacts and underground digging ........................ 30

Draft dated 27th May 2015 iv

7.1.7 Short Circuit ................................................................................................................................... 30

7.1.8 Electrical Trees ....................................................................................................................... 30

7.2 Examples of power outages (historical blackouts). ..................................................................... 31

8. CONCLUSION ....................................................................................................................................... 32

9. FUTURE WORK .................................................................................................................................... 33

References ................................................................................................................................................... 34

Appendix ...................................................................................................................................................... A

Appendix 1: Power Outages for 2014 and 2013 ...................................................................................... A

Appendix 2: List of required data for accurate calculation of SAIDI and SAIFI ................................... W

Draft dated 27th May 2015 1 of 34

1. INTRODUCTION

More than half of Brunei Darussalams revenue comes from the energy sector. The Energy White paper

has outlined three strategic goals to realize Brunei Darussalams energy vision. One of the Key

Performance Indicator (KPI) is to reduce the number of power outages by 2035, in line with the goals of

Wawasan 2035 [1].

The main aim of this project is to provide electric power distribution reliability indices, namely System

Average Interruption Duration Index (SAIDI) and System Average Interruption Frequency Index (SAIFI),

to benchmark DES (Department of Electrical Services) and chart improvements used in all utilities

worldwide. As well as to identify root causes of power outages in Brunei Darussalam.

The reliability indices of electric power distribution will follow a set of methodology outlined in IEEE

Guide for Electric Power Distribution Reliability Indices [2] to ensure the indices obtained are consistent

with best practices in the Power Industry.

1.1 Scope of Work

Understand existing distribution equipment and protection philosophy. This includes the

understanding of IEEE Std. 1366-2012 methodology (and other standards Department of

Electrical Services (DES) used) and consultation from DES personnel.

Gather information from DES. Conduct survey at a few substations and their feeders. Create and

understand sc

Recommended

View more >