SOUTHERN AFRICAN POWER POOL1 SOUTHERN AFRICAN POWER POOL1

Southern African Power Pool

SAPP AND ISSUES OF

STANDARDISATION

By Eng. Sydney Zimba

Sandton, RSA

27 March 2017

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A.

About SAPP

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•DR Congo•Tanzania

•Zambia•Angola •Malawi

•Zimbabwe

•Mozambique•Botswana•Namibia

•South Africa•Lesotho

•Swaziland

12 SADC Member Countries

280 Million people

Average Electricity demand

growth rate 3.2% p.a.

Consumption 321 TWh

Installed Capacity 59539 MW

Available Capacity 52589 MW

Peak Demand 46748 MW

1. SAPP KEY FACTS

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2. SAPP DEMAND SUPPLY SITUATION

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0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0Electricity Access in SADC, %

Electrification Access,% SADC Average Electricity Acess, %

3. ELECTRICITY ACCESS

36% SADC Region Average

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110 kV

132 kV

220 kV

275 kV

330 kV

400 kV

533 kV DC

765 kV

VOLTAGE LEVELSDRC

(SNEL)

ZAMBIA

(ZESCO)

ZIMBABWE

(ZESA)

MOZAMBIQUE

(EDM/HCB)

SWAZILAND

(SEC)

NAMIBIA

(NamPower)

BOTSWANA

(BPC)

LESOTHO

(LEC)

RSA

(Eskom)

RSA

(Eskom)

RSA

(Eskom)

500 *700 400

550

243

1500

90

554

100

84

1258

1200

171

20

40

* Figures depict 20015 ‘N-1-contingency-criterion’ power transfer capability limits in MW.

NOTE:

There are radial

distribution feeders

among both

operating and non-

operating

members. These

are NOT regarded

as SAPP

interconnectors.

1200

50

1381

610

150

830629

37661

219

2287

1589

4. SAPP GRID

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5. SAPP COMPETITIVE MARKET

72%

4%5%

2%

17%

Summary of Revenues on the Market for Period April 2016 to January 2017

Total USD68,988,935

Traded Amount [USD 49,995,451]

Wheeling Revenues [USD 2,699,294]

Losses Revenues [USD 3,120,100]

Administration Revenues [USD 1,729,980]

Congestion Income [USD 11,444,109]

2,580,381 MWh was

matched only 865,545

MWh (34%) traded due to

transmission constraints

Market share in MWh

FPM-M 8%, DAM 74%,

FPM-W 11%, IDM 7%

Average prices:

Off-peak: 3-6 USc/kWh

Standard: 4-10 USc/kWh

Peak: 10-14 USc/kWh

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6. SAPP TRANSMISSION PROJECTS

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B.

SAPP and

Standardisation

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TC8: System Aspects of Electricity Supply

TC 57: Power System Data Management

Working Groups of Interest:

TC8 WG2 –HV Transmission Systems

(Designs, PMUs)

TC8 WG6 – Smartgrid Requirements

TC8 PT 62749 - Power quality aspects

TC8 PT 62786 - Distributed Energy

Resources

TC8 SC8A - Interconnection of Large

Renewable Energy Generation.

1. TECH COMMITTEES OF INTEREST

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2. IEC Standards of interest

No. IEC Standard Subject

1 IEC TR

62511:2014

Guidelines for the design of

interconnected power systems

2 IEC/ IEEE PAS

63547:2011

Interconnecting distributed

resources with electric power

systems

3 IEC 60038:2009 IEC standard voltages

4 IEC TS 62749 Assessment of power quality -

Characteristics of electricity

supplied by public networks

5 IEC TR

62510:2014

Standardising the characteristics

of electricity

6 IEC 60059:1999 IEC standard current ratings

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3. Power Quality in SAPP

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Almost all SAPP member countries

have own grid codes

Jurisdiction of Regulators

Interconnection requires harmonisation of

some codes, as was done in EAPP

SAPP Operating Guidelines

Inferior to grid codes, revised in 2014

Has penalties for non-compliance

Includes requirements for connection of

IPPs

4. About Grid Codes

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5. CONNECTION OF IPPs

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6. EXAMPLES OF DESIGN DIVERSITY

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Equipment specification and

procurement

Competitive bids, impact on tariffs

Equipment performance

Failure affects energy interchange

Standardisation, speedy replacement

High voltage switching

Equipment identification

Quest for single African pool

SAPP connecting to EAPP in 2019

7. Standardisation, harmonisation

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8. SAPP System Viewer

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Thank You

End of Presentation