National Electrification IndabaNational Electrification Indaba16 March 201216 March 2012

Electrification Technical AspectsElectrification Technical Aspects

Nomvula KungwaneNomvula Kungwane

National Electrification IndabaNational Electrification Indaba16 March 201216 March 2012

Electrification Technical AspectsElectrification Technical Aspects

Nomvula KungwaneNomvula Kungwane

CONTENT

Connections History

Background

Impact on Electrification

KZN; EC and Limpopo infrastructure

2

Backlogs, EC; KZN and Limpopo

Designs

Conclusion

BACKGROUND

• Urban electrification was largely done in the past

• un-electrified households in urban areas are mostly growth & informal settlements

• Easy-to-execute projects were also done during the massive electrification program of the past

• Reality now:

• Difficulty to implement electrification projects without bulk infrastructure development

• rural electrification with high costs

• Funds are stretched to address both bulk infrastructure and household connections

IMPACT

• Less connections achievable

• There is a continuous need for the integration of the Electrification programme with Eskom’s Capital programme across Eskom divisions, esp. Transmission and Distribution

• example on planned infrastructure projects in the Eastern Cape, below

DESIGNS

• Changed from designing for initial ADMD to final ADMD designs and implementation

• Cheap designs = high maintenance costs

• Designs have evolved over the years, with mid-block (cheaper but difficult to reach for maintenance) and street-front

• SWER & dual-phase networks have been changed for 3-phase networks to accommodate future growth

• Split Metering technology implemented in some areas, to curb tempering

• it is necessary to ensure that poles, conductor, and line hardware incorporated in existing designs are used optimally - spans should be maximized

• Optimisation of designs for rural networks: installation of MV and LV conductors on the same poles/line

PROVINCE TOTAL NUMBER OF HOUSEHOLDS

BACKLOG (with growth)

Backlog (%)

EASTERN CAPE 1,683,420 647,593 19%

KWAZULU NATAL 2,439,751 816,354 24%

LIMPOPO 1,264,792 322,172 9%

. . . .

. . . .

. . . .

. . . .

TOTAL NATIONAL 12,860,165 3,440,699 100%

BACKLOGS: EC; KZN & LIMPOPO

NATIONAL ELECTRIFICATION BACKLOG

KZN 24%

LIMPOPO 9%

GAUTENG

MPUMALANGA7%NORTH WEST

6%

FREE STATE6%

NORTHEN CAPE1%

WESTERN CAPE 6%

EASTERN CAPE 19%

KZN BACKLOGS OVERVIEW

KZN NETWORK STATUS

SUBSTATIONS REQUIRED

Bulk Infrastructure Movement - Last 3 years

• Completed

Mandabeni; Nyokeni; Sgananda kaZokufa Shezi; Msinga; Hlabisa; Dlangezwa; Pomeroy

• Under Construction

Kenterton; uMzumbe; Ndwedwe; Mathondwane; Ladysmith; Corinth; Umzimkhulu

• *Bulk Infrastructure Focus Areas

Umkhanyakude; Ndumo; Gezisa, Mbazwana; Hlabisa; Gunjaneni; Ntambanana; Melmoth East; Mandini; ; Mangethe; uMshwathi; Applesbosch; uMzumbe; KwaXolo/KwaDeshula

• *These substations are for the sole purposes of rural electrification, there are other Substations planned to be built by Eskom which will also assist in electrification

Eastern CapeEastern Cape

13

Qunu

Tyalarha

Sappi

Paynes Farm Mafini

Kohlo

QumbuUgie

DumasiMagwa

Siphaqeni

Wiloi

1st Falls

EXISTING NETWORK

PROJECTS FOR 2012/13/14

Qunu

Tyalarha

Sappi

Paynes Farm

Mafini Kohlo

QumbuUgie

DumasiMagwa

132kV line to Hombe S/S and 2 x 10MVA 132/22kV Hombe s/s (R)Sappi/Elliot 132kV line and 1 x

40MVA 132/66kV Elliot substation (S)

Elliot/Ugie 132kV line (RR)

Decomission old 66kV line and associated substations (R)

132kV link line (16km) 2 x 20MVA 132/22kV Tombo s/s (S)

132kV line (30km)2 x 20MVA 132/22kV Mfinizo s/s (DoE)

132kV line (30km)2 x 20MVA 132/22kV Taweni s/s (DoE)

2nd 20MVA 132/22kV Qumbu S/S Trfr (RR)

4 132kV feeder bay (S)Vuyani/Zimbane 1 132kV line; Vuyani/Zimbane 2 132kV lineVuyani/Mafini 132kV line; Vuyani/Qunu 132kV line

2 x 10MVA 132/22kV Mjika s/s132kV link lines (4km) – (S)

132kV link line (2km)2 x 20MVA 132/22kV Mafini s/s (S)

VUYANI MTS PROJECTEros/Vuyani 400kV line, 3 x 250MVA 400/132kV Vuyani Substation (S)

Zimbane/Paynes 132kV line & 2 x 20MVA 132/22kV Paynes Farm S/S Paynes Farm/Sappi 132kV lines & 2 x 20MVA 132/22kV Sappi S/S (S)

Qolweni/Hlobo and Hlobo/Vuyani 132kV line, 2 x 20MVA 132/22kV Hlobo S/S (S)

LimpopoLimpopo

16

LIMPOPO PROVINCE Network Status

17

Red – Network constrained

Yellow – Limited capacity on large parts of network

Green – Capacity Available

18

Bolubedu

Mamitwa

Mooketsi

Tarentaal

BendstoreMagpot

Thomo

Soekmekaar

Malamulele

Tshikeweta

Tabor

Spencer

Hlanganani

Venulu

Muledani

Flurian

Louis Trich

ParadiseNjeleleT

Soutpan

Pontdrif

Leeudraai

Sanari

Makonde

Bochum

Venetia

Messina

Botlokwa

Witkop

Giyani

Ribolwa

Mageva

Phugwane

Mhinga

Mashau

Singo

RioTinto CoalTshilambaMakhado Coal

Mandala

Thulamela

2011/12

2012/132011/12

2013/14

2013/14

2015/16

2015/16

2013/14

Mamaila

2011/12

2011/12

2012/13

New MTS

Dendron

Mbahe

Bulk Infrastructure Development

Thohoyandou

TzaneenPolokwane

Limpopo Bulk Infrastructure: 2010-2015

Item Project Name Municipality Scope 

1 Singo Substation Makhado 2 x 20MVA Substation 132/22kV 37kM 132kV Line – Kingbird

2 Mashau substation Makhado 2 x 20MVA Substation 132/22kV 250M 132kV Line – Kingbird

3 (Jilongo ) Phugwane substation

Thulamela 2 x 20MVA Substation 132/22kV 35kM 132kV Line – Kingbird

4 Lambani (Mhinga) Substation

Thulamela 2 x 20MVA Substation 132/22kV 30kM 132kV Line – Kingbird

5 Mbahe Substation Thulamela 2 x 20MVA Substation 132/22kV 2kM 132kV Line – Kingbird

Limpopo Bulk Infrastructure: 2010-2015

Item Project Name Municipality Scope 

6 Tshilamba Substation

Mutale 2 x 20MVA Substation 132/22kV 10kM 132kV Line – Kingbird

7 Mamaila Substation

Greater Letaba 2 x 20MVA Substation 132/22kV 16kM 132kV Line – Kingbird

8 Mageva Substation Greater Letaba 2 x 20MVA Substation 132/22k 37kM 132kV Line – Chickadee

9 Mamatsekele Substation

Lepelle Nkumpi 2 x 20MVA Substation 132/22kV 37kM 132kV Line – Kingbird

10. Rampheri Substation

Polokwane 2x10MVA Substation 132/11kV 30kM 132kV Line – Kingbird

CHALLENGES

• Land acquisition for infrastructure projects

• Significant footprint of Protected trees

• Illegal connections

• resulting in overloaded networks

• Public fatalities (Bambamenchies; KaMhlushwa)

• Maintaining good technical performance of the network – balance service extension with network strengthening; refurbishment as well as normalisation

• Equipment theft: cables and transformers

CONCLUSSION

• Electrification requires focus from a financial and technical perspective in order to optimise costs and reach a bigger footprint

• The industry must work together to implement available technologies for access to energy

• Solutions for electrification should be custom made to avoid over and/or under-designs

• Harmonisation between DoE & Human settlements

• Eskom supplementary funding of infill connections and some infrastructure projects