transmission and distribution line and substation infrastructures
DESCRIPTION
Transmission and Distribution LineAnd Substation Infrastructures SETBACKS & WAYLEAVE CORRIDORS- EXISTING & FUTURE INSTALLATIONCONCEPTSTRANSCRIPT
Transmission and Distribution Line
And Substation Infrastructures
SETBACKS & WAYLEAVE CORRIDORS SETBACKS & WAYLEAVE CORRIDORS - EXISTING & FUTURE INSTALLATION
CONCEPTS
SABAH ELECTRICITY SDN BHD
Sabah Power Grid Network System
Concepts of Electrical Grid System
GENERATION
TRANSMISSIONTRANSMISSION
DISTRIBUTION
CONSUMERS
Regulatory Requirements & Prudent Utility Practices
1. Meet Regulatory Requirements & Prudent Utility Practices
i. Electricity Supply Act 1990
ii. Electricity Regulation 1994
iii. EC Malaysia Way-leave Guidelines
iv. SESB Electricity Supply Application Handbook (2008)
v. SESB Safety Rules and Design Specifications
2. Design & develop electrical system infrastructures in an
economical way considering safety, security, efficiency
and reliability of power supply.
Requirement Under The Act/Regulations
Ensure safety of person and security of the supply lines, theElectricity Supply Act 1990 and the Electricity Regulations 1994stipulate the following provisions:
1. No person shall without lawful authority of the supply authority of thelicensee, undertake any work or engage in any activity in the vicinity ofany electrical installation or part of thereof in a manner likely to interfereany electrical installation or part of thereof in a manner likely to interferewith any electrical installation or to cause danger to any person orproperty.
2. The minimum clearances from ground for supply lines shall be asshown in following tables.
3. The minimum clearance of any building or structures from high voltagesupply lines, apart from a substation building, must not be less than 4.57metres.
Minimum Ground Clearance for Transmission Lines
Operating Voltage
of the Lines
Clearance from Ground
(As provided for in the Electricity Regulations 1994)
Over roads
(metres)
Other than over roads
(metres)
In positions inaccessible
to vehicular traffic
(metres)
66kV 6.1 6.1 5.18
132kV 6.7 6.7 5.79132kV 6.7 6.7 5.79
275kV 7.0 7.0 7.0
500kV 7.3 7.3 7.3
* Ensure that trees or plants grown under or in the vicinity of the high voltage electricity
supply lines are less than 2.4 metres in height
Minimum clearance of any building or structures from high voltage supply lines,
apart from a substation building, must not be less than 4.57 metres.
Minimum Ground Clearance for Distribution Line –Up to 33kV
Operating Voltage
of the Lines
Clearance from Ground
(As provided for in the Electricity Regulations 1994)
Over roads
(metres)
Other than over roads
(metres)
In positions inaccessible
to vehicular traffic
(metres)(metres)
415V
11kV
33kV
5.49
5.79
5.18
5.49
4.57
4.88
* Ensure that trees or plants grown under or in the vicinity of the high voltage electricity
supply lines are less than 2.4 metres in height
Minimum clearance of any building or structures from high voltage supply lines,
apart from a substation building, must not be less than 4.57 metres.
REASONS FOR SETBACKS/BUFFER ZONES
a) Reduce the potential for future incompatible
land use conflicts
b) Restrict the future development of sensitive land
uses in close proximity to existing or proposed
distribution & transmission infrastructures
c) Meet Regulatory Requirements
FUTURE KOTA KINABALU ELECTRICAL TRANSMISSION SYSTEM
Typical Transmission Overhead Line Structures
Typical Right of Way For Overhead Line Structures
20m 20m
Pole Structure for Transmission Line
Close-up of the Base of an
Angle Structure
Typical Future Transmission Overhead Steel
/ Concrete Pole Structure
Typical Right of Way For
Overhead Steel / Concrete Pole Structure
20m 20m
Tower or Pole
Red Zone – measured 12m either
side of transmission line +
distance around structure and
Future Typical Right of Way For Transmission Overhead Line Structures
distance around structure and
conductor swing
Orange Zone – measured 20m
either of the red zone
Green Zone – beyond the
orange zone
Typical Transmission Underground Cable System Infrastructure
Wayleave Corridors for Transmission
Underground Cable SystemCorridor for
underground Cable
Road Shoulder / Perimeter Drain
ARoad
No Voltage System Corridor for Underground
Cable from Road Shoulder / Cable from Road Shoulder / Perimeter Drain (A)
1 275 kV System 5 m
2 132/66 kV System 3 m
SESB Cable Gas/Water/Telco. pipe
2m
3m
Ground Surface
Typical GIS Building
Indoor Gas Insulated
Switchgear Building
Future Underground GIS substation
Use of gas-insulated switchgear allowed the 132-kV transformer substation in the center of Kota Kinabalu to be constructed underground and a park built over
it which harmonizes with the surroundings. The sound of the waterfall, which acts as a heat-exchanger, hides the noise made by the fans.
Wayleave Requirement for SESB
Distribution Overhead Line
A BRoad Shoulder /
Perimeter DrainBuilding Structure /
Plants
No Type of conductor Wayleave
Distance A
Wayleave
Distance B
1 Aerial Bundled Cable (ABC) – 33 kV 2 m 5 m
2 Aerial Bundled Cable (ABC) – 11 kV 2 m 2 m
3 Overhead Line (Bare) – 33 kV 3 m 6 m
4 Overhead Line (Bare) – 11 kV 3 m 3 m
5 Overhead Line (Lattice Tower) – 33 kV 8 m 8 m
Wayleave Corridors for Distribution
Underground Cable SystemCorridor for
underground Cable
Road Shoulder / Perimeter Drain
ARoad
No Voltage System Corridor for Underground
Cable from Road Shoulder / Cable from Road Shoulder / Perimeter Drain (A)
1 33 kV System 2 m
2 11 kV System 1.5 m
SESB Cable Gas/Water/Telco. pipe
1.2m
2m
Ground Surface
Distance
@
Building / Structure PPU/PE SESB
Building / Sewerage Sewerage Pond Garbage Waste
Wayleave Requirement for Distribution Substation
Building / Structure
SeweragePump House
Sewerage Pond Garbage Collection
Center
Waste Disposal Center
PPU 50m 250m 50m 500m
PE 30m 100m 50m 100m
Building / Structure
Slope Upward (withretaining wall)
Slope Downward (withretaining wall)
River Ocean
PPU 10m 30m 50m 250m
PE 10m 30m 50m 100m
Typical Setback for Distribution Substation
Typical Substation Land and Building Sizes Requirements
Substation Category
Type Land Size (Building Size)
Building Design
PencawangMasuk Utama
(PMU)
Gas Insulated Switchgear (GIS) without outdoor switchyard
a) 132/33/11kVb) 275/132/33kV
1.5 acres2 acres
Customized design subject to SESB approval
Conventional Outdoor AISa) 132/33/11kVb) 275/132/33kV
8 acres20 acres
PencawangPenurun Utama
Indoor Type 45 m x 45 m(23 m x 29 m)
Customized design subject to SESB approval
Penurun Utama(PPU)
– 33/11kV
(23 m x 29 m)
Outdoor Switchyard Subject to SESB approval
Main SwitchingSubstation (SSU)
– 33kV & 11kV
(a) Conventional (33kV) 33 mx 22 m(21 m x 10 m)
Customized design subject to SESB approval (with inclusion of meter room)
(b) Conventional (11kV) 20 m x 14 m(8 m x 6 m)
DistributionSubstation (PE) – 11/0.400kV
(a) Single transformer substation 14 m x 18 m(8 m x 6 m)
According to SESB design
(b) Double transformer substation 17 m x 18 m(11 m x 6 m)
(c) Compact Substation Subject to SESB approval
For special case application
(d) Outdoor Substation 6 m x 6 m Limited to those located in the rural areas.
Future Challenges & Moving Forward
A long-term planning, strategic line route and line corridor
selection and setbacks :
� With a changed and more focused approach
� With clearer governmental strategy/plan for SESB Projects� With clearer governmental strategy/plan for SESB Projects
The issue of incompatible land uses between high voltage
transmission and distribution lines, substations and sensitive land
uses could be addressed by creating buffer zones that apply to
future development areas to be implemented in the next update
of the Kota Kinabalu Local Plan 2020 and Structural Plan 2030
and Land Use Bylaw review.
THANK YOU FOR YOUR ATTENTION