DL/T 5056-2007 English PDF (DLT5056-2007)

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DL/T 5056-2007: Technical code of general plan design for substation
DL/T 5056-2007
POWER INDUSTRY STANDARD OF
THE PEOPLE?€?S REPUBLIC OF CHINA
ICS 29.240.10
P 62
Record No.: J761-2007
Replacing DL/T 5056-1996
Technical Code of General Plan Design for Substation
ISSUED ON: DECEMBER 3, 2007
IMPLEMENTED ON: JUNE 1, 2008
Issued by: National Development and Reform Commission
Table of Contents
Foreword ... 3??
1 Scope ... 6??
2 Normative References ... 7??
3 General Principles ... 8??
4 General Planning ... 9??
5 General Plane Layout ... 11??
6 Vertical Layout ... 18??
7 Underground Pipeline (trough) Layout ... 28??
8 Roads ... 35??
9 Treatment and Afforestation of Outdoor Power Distribution Unit Site ... 39??
10 Technical and Economic Indicators ... 41??
Technical Code of General Plan Design for Substation
1 Scope
This Standard stipulates the basic technical requirements of general plan design for
substations.
This Standard is applicable to the general plan design for newly constructed or
expanded substations with the voltage level of 110 kV ~ 750 kV. The general plan
design for substations with the voltage level of above 750 kV, reconstructed
substations and converter stations may also take this as a reference.
2 Normative References
Through the reference in this Standard, clauses in the following documents become
clauses of this Standard. In terms of references with a specific date, all the subsequent
modification orders (excluding the corrected content) or revised editions are not
applicable to this Standard. However, all parties that reach an agreement in
accordance with this Standard are encouraged to explore the possibility of adopting
the latest versions of these documents. In terms of references without a specific date,
the latest versions are applicable to this Standard.
GB 50007 Code for Design of Building Foundation
GB 50016 Code for Fire Protection Design of Buildings
GB 50187 Code for Design of General Layout of Industrial Enterprises
GB 50201 Standard for Flood Control
GB 50229 Code for Design of Fire Protection for Fossil Fuel Power Plants and
Substations
GB 50330 Technical Code for Building Slope Engineering
GBJ 22 Specifications for the Design of Factory and Mine Roads
DL/T 5032 Technical Code of General Plan Transportation Design for Fossil Fuel
Power Plants
3 General Principles
3.0.1 The general plan design for substations must comprehensively implement the
nation?€?s fundamental construction policies; reflect the nation?€?s technical and economic
policies; unify and clarify construction standards; guarantee that newly constructed
(expanded) substations are safe, reliable, technologically advanced, affordable and
consistent with the national conditions.
3.0.2 The general plan design for substations must establish an overall viewpoint;
conduct in-depth investigation and survey; rely on technological progress; design
meticulously; continuously summarize experience; energetically and deliberately
promote domestic and foreign advanced technologies; adapt measures to local
conditions and adopt mature new materials, processes and plans; satisfy the
requirements of sustainable development.
3.0.3 The general plan design for substations shall comply with relevant stipulations of
Land Administration Law of the People?€?s Republic of China; comply with the nation?€?s
land utilization policies; adapt measures to local conditions; implement land
conservation and reasonable land utilization; enhance land utilization rate; make the
most of wastelands, badlands and sloping lands; refuse to occupy, or, occupy very little
farmlands. Furthermore, the general plan design for substations shall reasonably
utilize landforms, decrease site leveling soil (stone) quantity and demolition of the
existing facilities and constructions (structures); avoid or reduce land acquisition on
behalf of others. Through the techno-economic comparison of multiple plans, optimize
design plans; reduce construction costs; shorten construction periods; create
conditions for civilized construction.
3.0.4 This Standard was formulated in accordance with the principles of GB 50187
Code for Design of General Layout of Industrial Enterprises. Except from the execution
of this Standard, the general plan design for substations constructed under special
natural conditions, such as mountainous areas, earthquake areas, collapsible loess
areas, expansive soil areas, soft soil areas, permafrost areas and salinized soil areas,
shall still comply with the relevant stipulations in the existing national standards and
industry standards.
3.0.5 The general plan design for expanded and reconstructed substations shall
combine the characteristics of the previous general plane layout, vertical plan and
equipment setting, so as to reach coordinative unity of the integrity.
4 General Planning
4.0.1 The general planning for substations shall coordinate with the local town planning,
industrial park planning, natural reserve planning or tourism area planning. Substations
shall not be located in geological disaster-stricken sections, such as landslide, debris
flow, large water-eroded cave and mined-out area. Substations shall not be
constructed over mineral products or cultural relics. Avoid mutual interference with
military, aviation and communication facilities. Off-site traffic shall satisfy the
requirements of the transportation of large-sized equipment. Thoroughly utilize nearby
public facilities in livelihood, culture and education, sanitation, traffic, fire protection
and water supply and drainage, etc.
In terms of substations in special landforms, for example, mountainous areas, the
overall planning shall consider the influence of landforms, stability of mountain massif,
slope excavation, flood and waterlogging. Construction of substations in areas affected
by torrential flood and waterlogging should thoroughly utilize the existing flood control
and waterlogging control facilities in the locality.
4.0.2 The overall planning of urban underground (indoor) substations shall satisfy the
requirements of local urban planning; avoid mutual interference with adjacent
neighbors, enterprises and facilities.
4.0.3 The overall planning of substations shall base on the requirements of process
layout, and the demands for construction, operation, overhauling and ecological
environmental protection; combine site location?€?s natural conditions; implement overall
planning in accordance with the final scale; combine the short-term and long-term
planning, and focus on the short-term planning. In staged construction, in accordance
with the requirements of load development, implement reasonable planning;
expropriate land by stages or at a time.
The overall planning shall base on the above-mentioned principles, make overall
arrangements of substation areas, water sources, water supply and drainage facilities,
entry roads, flood control and discharge facilities, entry and exit corridors, terminal
tower, external power supply and the influence of ambient environment; implement
reasonable layout.
4.0.4 When there are pollution sources near substations, the overall planning shall
base on the category of pollution sources and the prevailing wind direction throughout
the year to prevent adverse influence on the substations.
4.0.5 Substations shall be equipped with reliable water sources. The quality of drinking
water shall comply with the national standard on drinking water hygiene. Production
waste drainage or raindrops and domestic sewage of the substations shall comply with
national or local standards on emission.
5 General Plane Layout
5.1 General Regulations
5.1.1 The general plane layout for substations shall comply with the final scale in
planning and design. In accordance with the requirements of systematic load
development, the possibility of expansion should not be cut down; the general plane
layout for substations shall be as structured as possible.
5.1.2 The general plane layout for substations shall satisfy the overall planning
requirements; process layout in the substations shall be reasonable. Function division
shall be clarified; traffic shall be convenient; land utilization shall be optimal.
5.1.3 The general plane layout for substations shall centralize the recently constructed
constructions (structures), so as to facilitate staged construction and land conservation.
The civil engineering of urban underground (indoor) substation construction shall be
constructed at a time in accordance with the final scale.
5.1.4 The main production and auxiliary (affiliated) buildings of substations shall be
intensively or jointly arranged. When substations are jointly constructed with convertor
stations, they may be intensively or jointly arranged in front of substation areas in
accordance with the nature of auxiliary (affiliated) buildings and the classification of
functional requirements.
5.1.5 On the premise of taking smooth outlet planning and reasonable process layout
into consideration, substations shall combine the layout of natural landform and reduce
soil (stone) quantity to the minimum. When landform height difference of substation
areas is relatively large, stepped-style layout may be adopted.
When the main production constructions (structures) and equipment structural support
of substations in mountainous areas are close to side slopes, the safe distance from
the constructions (structures) to the slope top and slope toe shall be determined in
accordance with 6.3.4 in this Standard.
5.1.6 Between urban underground (indoor) substations and off-site adjacent buildings,
fire exits shall be reserved. The net width and net height of fire lanes shall satisfy
relevant stipulations in GB 50016 Code for Fire Protection Design of Buildings.
5.1.7 Important constructions (structures), such as main control communication
building (room), indoor power distribution unit building (room), large-scale substation
framework, and large-sized equipment, such as GIS composite apparatus, main
transformer, high-voltage reactor and capacitor, should be set up in sections with
uniform soil texture and reliable soil foundation.
5.1.8 In terms of substations located in expansive soil areas, constructions (structures)
which have rigorous requirements towards deformation should be arranged in sections
5.3.3 Rain valve chamber or foam fire-fighting equipment room should be arranged
near oiled equipment, such as main transformer and electric reactor, etc.
5.3.4 When setting up diesel generator room, the arrangement should avoid noise and
vibration effect on the main control communication building; the arrangement should
be as close to AC and DC power distribution rooms as possible.
5.3.5 Water supply and drainage facilities of substations should be separately arranged.
The minimum clear distance shall satisfy relevant stipulations of the existing national
standards.
5.3.6 Water supply constructions (structures) of substations, such as deep-well
pumping room, domestic fire-fighting pumping room and reservoir, should be
intensively arranged in front of substation area in accordance with the process flow.
5.3.7 Buried domestic sewage treatment units should be arranged nearby on a
secluded side near the main control communication building, or, arranged in the edge
zone in front of substation area.
5.3.8 When substation area adopts strong drainage, rain pumping room should be
arranged in relatively low edge zone in the substation area.
5.4 Walls, Fences and Main Entrances
5.4.1 The type of substation walls shall be comprehensively determined in accordance
with certain factors, such as substation location, urban planning and environmental
requirements.
Substations should adopt tangible walls with the height of not lower than 2.3 m. In filing
areas, the height of walls may be properly reduced. In terms of urban substations, or
substations that have requirements towards the environment of substation area,
grillwork walls or other decorative walls may be adopted.
5.4.2 Walls in the substation area shall base on the principle of land conservation and
security guard, strive to be smooth and flat. Walls in the substation area in complex
landforms or mountainous areas shall be arranged in accordance with the landforms.
5.4.3 Tangible walls in the substation area shall set up expansion joint. The spacing
between expansion joints should not be more than 30 m. In areas where wall height
and geological conditions might change, settlement joints shall be set up.
5.4.4 In accordance with the layout and requirements of electrical equipment, if
necessary, fences may be set up around the equipment.
5.4.5 The main entrance to substations should face main roads in the locality, which
makes it convenient for the connection to entrance roads. The orientation and handling
requirements of main entrances to urban substations shall coordinate with urban
6 Vertical Layout
6.1 General Regulations
6.1.1 The design elevation of substation areas shall be determined in accordance with
substations?€? voltage level.
In terms of 220 kV hub substations and above 220 kV voltage level of substations, the
design elevation of substation areas shall be higher than flood water level at the
frequency of 1% (recurrence interval, same below) or the historically highest inland
water level. The design elevation of substation areas of other voltage levels shall be
higher than flood water level at the frequency of 2% or the historically highest inland
water level.
When the design elevation of substation areas cannot satisfy the above-mentioned
requirements, respectively adopt the following three different measures in accordance
with the distinction of different circumstances.
1. When measures are adopted in the elevation of the site, the design elevation
shall be not lower than flood water level or the historically highest inland water
level.
2. When flood control or waterlogging control measures are adopted in the
substation area, the elevation of flood control or waterlogging control measures
shall be 0.5 m higher than the above-m...