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DL/T 5218-2012 English PDF (DLT5218-2012)

DL/T 5218-2012 English PDF (DLT5218-2012)

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DL/T 5218-2012: Technical code for the design of 220kV~750kV substation

This standard is, according to the requirements of the National Energy Administration on the Notice of Issuing the 2009 Development/Revision Plan of the First Batch of Energy Industry Standards (GNKJ [2009] No.163 Document), the revision of and quot;Technical code for the design of 220kV ~ 750kV substation and quot; DL/T 5218-2005. The main drafting organization is China Power Engineering Consulting Group Huadong Power Design Institute, together with the participated drafting organizations.
DL/T 5218-2012
ICS 29.240
P 62
Registration number: J1459-2012
P DL/T 5218-2012
Replacing DL/T 5218-2005
Technical code for the design of
220kV ~ 750kV substation
Issued by: National Energy Administration
Table of Contents
Foreword ... 7
1 General provisions ... 9
2 Terms ... 10
3 Selection of the substation location ... 12
4 General plan and layout of the substation ... 14
4.1 Plan of the substation ... 14
4.2 General layout ... 14
4.3 Vertical arrangement ... 18
4.4 Trench layout ... 20
4.5 Road ... 21
4.6 Site treatment ... 22
4.7 Fence and gate ... 22
5 Primary electrical ... 24
5.1 Electrical circuit connection ... 24
5.2 Main transformer ... 26
5.3 Electrical installation ... 27
5.4 Reactive power compensation ... 29
5.5 Overvoltage protection and insulation coordination, grounding ... 29 5.6 AC station service ... 29
5.7 Lighting ... 30
5.8 Selection and laying of the cable ... 30
5.9 Auxiliary facilities ... 31
6 System and secondary electrical ... 32
6.1 Relaying protection and automatic device ... 32
6.2 Dispatch automation ... 32
6.3 Communication ... 33
6.4 Monitoring and control system and electrical secondary wiring ... 34 6.5 DC power system and uninterruptible power supply (UPS) ... 35
6.6 Arrangement of control room and relay room ... 35
6.7 Safety video monitoring system ... 36
7 Civil works ... 37
7.1 General requirement ... 37
7.2 Loads ... 37
7.3 Buildings ... 40
7.4 Structures ... 41
8 Heating, ventilation and air conditioning ... 45
8.1 Heating ... 45
8.2 Ventilation ... 45
8.3 Air conditioning ... 46
9 Water supply and drainage ... 47
10 Fire protection ... 48
10.1 General requirement ... 48
10.2 Firefighting facilities ... 48
10.3 Fire detection and fire alarm ... 49
11 Environmental protection ... 50
11.1 General requirement ... 50
11.2 Control of electromagnetic radiation ... 50
11.3 Control of noise ... 50
11.4 Treatment of waste water ... 51
11.5 Water-soil conservation and ecological environment protection ... 51 12 Labor safety and occupational health ... 53
12.1 General requirement ... 53
12.2 Labor safety ... 53
12.3 Occupational health ... 54
13 Energy saving ... 56
13.1 General requirement ... 56
13.2 Electrical energy saving ... 56
13.3 Building and thermal energy saving ... 56
13.4 Heating, ventilation and air condition energy saving ... 57
13.5 Water saving ... 58
Explanations of wording in this standard ... 59
List of quoted standards ... 60
Technical code for the design of
220kV ~ 750kV substation
1 General provisions
1.0.1 In order to meet the needs of national and industry standardization construction, reach a unified standard technical principle for design of substation, allow the design of substation to meet the relevant national policies, laws, regulations, reach the requirements of safety and reliability, advanced and applicability, energy saving and environmentally friendly, it hereby develops this standard.
1.0.2 This standard is applicable to the design of the newly built, reconstructed, extended work of substation (switchyard) which has an AC voltage of 220kV ~ 750kV.
1.0.3 Substation design shall be combined with engineering features, actively and deliberately adopt new technologies, new device, new materials, new processes with application conditions.
1.0.4 In addition to the implementation of this standard, the design of substation shall also comply with the relevant national standards.
2 Terms
Part of the power system, which is concentrated in a defined location,
including terminals, switches and control device, buildings and transformers for power transmission or distribution. It usually includes the facilities (such as protective devices) required for the safety and control of power system. 2.0.2
Uninterruptible power supply
The power supply which consists of a battery pack, an inverter, other circuits, that provides AC power when the power grid is out of power.
Substation automation system
A computer application system that implements functions such as
information collection, processing, monitoring, control, operation
management of substation based on computer, network, communication
Unattended operation mode
An operation management mode, in which the operation monitoring of the
substation and the main control operation are carried out by the remote control end, the device of the substation is regularly patrolled and maintained. There are no on-duty personnel in the substation for fixed operation and maintenance.
Relay room
A place where the relay protection, automatic devices, transmitters, energy accumulation and recording instruments, auxiliary relay screens, etc., are installed.
Time synchronization system
3 Selection of the substation location
3.0.1 The site selection of the substation shall be based on the network structure, load distribution, urban-rural planning, land acquisition and demolition and the following provisions of the power system planning and design. It shall use technical and economic comparison and economic benefit analysis to
select the optimal solution of site location.
3.0.2 When selecting the substation's location, pay attention to saving land and using the land reasonably. Try to use wasteland and inferior land, do not occupy or occupy less cultivated land or land of high economic benefits, minimize the earthwork or stonework.
3.0.3 The selection of substation's location shall conform to the approved prospective development plan of the power system in the region, meet the requirements for cable laying, reserve the laying channel of overhead and cable lines, avoid or reduce the crossover of overhead lines. The location of the terminal tower of overhead line should be arranged uniformly when planning the substation's location.
3.0.4 The selection of substation's location shall be based on transportation conditions and substation's construction needs, facilitating the connection of incoming roads and large-piece transportation. It shall use the technical and economic comparison to implement the large-piece transportation plans.
3.0.5 The substation's location shall have suitable geological and topographical conditions. It shall avoid unfavorable geological structures such as landslides, debris flows, subsidence zones, earthquake-fracture zones. It should avoid submerged caves, goafs, exposed and concealed river ponds, shore scouring areas, areas prone to rolling stones, try to avoid or reduce damage to forests and natural landscapes.
3.0.6 The substation's location shall avoid the natural areas and cultural relics that are mainly protected, do not cover the mineral resources. Otherwise, it shall obtain the written consent of the relevant departments.
3.0.7 The selection of substation's location shall meet the requirements of flood control and prevention. Otherwise, it shall take flood control and prevention measures.
3.0.8 There shall be a reliable source of water for production and domestic use near the substation's location. When groundwater is used as a water source, it shall carry out hydrogeological surveys or explorations, submit report. 3.0.9 There shall be reliable power supply around the substation's location which meet the requirements of substation construction and external power 4 General plan and layout of the substation
4.1 Plan of the substation
4.1.1 The general plan of the substation shall be coordinated with the local urban planning or industrial zone planning. It should make full use of the nearby public facilities such as traffic, water supply and drainage, flood control. 4.1.2 The layout of substations shall, based on the needs of process technology, operation, construction and expansion, combined with the needs of life and the natural conditions of the site, be planned according to the final scale, combining short-term and long-term, focusing on short-term. It should requisite land in phases according to the building needs. Production areas, access roads, cable incoming and outgoing corridors, location of terminal towers, location of water sources, water supply and drainage facilities, flood discharge and flood control facilities shall be arranged in a unified and rational manner.
4.1.3 For the substation in flood control and seismic fortification areas, it shall, based on such factors as geology and topography, arrange the main production constructions (structures) in relatively favorable areas.
4.1.4 The positioning of substation's location shall rationally use geological and topographical conditions. For the high and steep slope, it shall analyze its stability and the impact on the building and structures, take safety measures to prevent human and animal from falling.
4.1.5 The site of substation should adopt a flat slope layout. When the terrain has a large height difference, it may use a step arrangement.
4.2 General layout
4.2.1 The combination of plane and space of substation buildings shall, according to the process requirements, make full use of natural terrain, to ensure that the layout is compact and reasonable and the expansion is
4.2.2 The layout of the supporting and auxiliary buildings of the substation shall be uniformly planned according to the process requirements and use functions. It should, combining with the engineering conditions, use the combined building and multi-floor building, to improve the efficiency of use of the site and save land.
4.2.3 The type selection of power distribution device shall be adapted to local conditions. When the technical and economic indicators are reasonable, it 2. It the adjacent exterior walls of the two buildings are non-combustible and have neither door and window openings, nor exposed inflammable eaves, the fire separation distance may be reduced by 25% according to this Table.
3. If two buildings are adjacent to each other and the higher exterior wall is a firewall, the fire separation distance is not restricted. But the clearance between the doors and windows of the two buildings shall not be less than 5m.
4. When installing electrical devices such as oil-immersed transformers and reactors, collective or combustible medium capacitors within 5m outside the wall of production building and structure, within the range of this wall below the horizontal line 3m above the total height of device as well as 3m at both sides of the device contour, there shall be no door, window, or opening. When the exterior wall of the building is 5m ~ 10m from the outer contour of the device, the exterior wall within the above range may be provided with grade-A fire doors. It may be provided with fireproof window above the height of device, the fire endurance limit shall be not less than 0.9h.
5. The distance between the outdoor power distribution device and other buildings and structures is, unless otherwise specified, calculated by the structure. When the relay room is arranged in the outdoor power distribution field, the spacing is determined by the process.
6. The distance between the outdoor power distribution device and the roadside should not be less than 1.5m, or not be less than 1m under difficult conditions. 7. Where there is no firewall between the outdoor oil-immersed transformer, oil- immersed reactor and collective capacitor, the net fire-proof distance shall not be less than the following values: 5m for 35kV; 6m for 66kV; 8m for 110kV; 10m for 220kV and above.
8. The minimum spacing as not specified in the Table is indicated by "-", which can be determined according to the needs of process layout. The distance between the fence and the production buildings of category C, D, E or the living buildings in the substation may be limited if it meets the requirements of fire protection. 9. For the oil-free device, it does not consider spacing.
4.3 Vertical arrangement
4.3.1 The vertical design of the substation shall be carried out simultaneously with the general layout, meanwhile shall be coordinated with the elevations of the existing and planned roads, drainage systems, surrounding sites outside the substation. It should use the flat-slope type or step type. The design elevation of the substation area shall be determined according to the voltage level of the substation.
4.3.7 The drainage of the site shall be reasonably selected based on the terrain of the substation area, the rainfall of the site, the nature of the site soil, the vertical arrangement and road layout of the substation area. It should use the natural ground slope for drainage and seepage, open ditch of rainwater, concealed ditch, concealed tube, or mixed drainage method.
4.3.8 The vertical arrangement of the expanded and reconstructed substation shall be coordinated with the vertical arrangement of the original substation area and make full use of the original drainage facilities.
4.4 Trench layout
4.4.1 The layout of pipes and trenches shall be planned together with the final scale of the substation. The pipes and trenches shall be coordinated with each other and with building and structures in the plane and vertical arrangement, the short-term shall be combined with the long-term. It shall be reasonably arranged to facilitate expansion.
4.4.2 The layout of pipe and trench shall meet the following requirements: 1. Meet the process requirements, the pipe and trench path are short, easy to construct and maintain.
2. Under the premise of meeting the requirements of process and use, it shall be buried as shallow as possible, try to be consistent with the sloping direction of vertical design of the substation area, to avoid reverse slope. 3. When the pipe or trench fails, it shall not endanger the safety of the building and structures and cause pollution of drinking water sources and the environment.
4. Pipe and trench design shall take measures against chemical corrosion and mechanical damage, as well as anti-freeze measures in cold and
freezing districts.
4.4.3 It shall, based on the factors such as process requirements, geological conditions, pipe material characteristics, medium in the pipe, layout of buildings and structures within the site, to determine the laying method of pipeline: direct burial, trenching, overhead, etc.
4.4.4 Under the conditions of meeting the safe operation and facilitating maintenance, the pipelines of the same type or the pipelines of different uses but having no mutual impact may be laid in the same trench.
4.4.5 Underground pipelines shall not be arranged within the range of impact by the foundation pressure of the building or structure.
than 7.0m. For the road section for motor vehicles and flatbed vehicles, the turning radius shall be determined according to the technical performance of the motor vehicles and flatbed vehicles. The longitudinal slope of the road in the substation should not be greater than 6%. In case of stepped layout, it should be not more than 8%.
4.5.7 The pavement of road within the substation should be cement concrete pavement. Where it has construction conditions and maintenance conditions, it may also use asphalt concrete pavement.
4.5.8 The width of the road in the substation is determined according to the following principles:
1. Trunk road from substation's gate to main control communication building and main transformer:
1) It may be widened to 4.5 m for the 220kV substation;
2) It may be widened to 5.5 m for the 330kV and above substation.
2. The trunk loop road in the substation shall meet the fire protection requirements; the pavement width is generally 4m.
3. The width of the maintenance road within the outdoor power distribution device as well as the road between the 500kV and above substations
should be 3.0m.
4. The width of the pavement of small patrol path in the substation should be 0.6m ~ 1.0m. The width of the pavement of sidewalk connecting to the
building should be 1.5m ~ 2.0m.
4.6 Site treatment
4.6.1 In the outdoor power distribution device area, it should set the operation floor according to the process requirements.
4.6.2 The substation site may adopt such treatment measures as gravel, pebble pavement or lime soil closure, or it may be properly greened.
4.7 Fence and gate
4.7.1 The fence of the substation area should be a solid wall which has a height of 2.2m ~ 2.8m. Where there are noise control requirements, the height of fence of substation may be determined as needed.
4.7.2 The gate of the substation should use lightweight iron doors or electric 5 Primary electrical
5.1 Electrical circuit connection
5.1.1 The electrical circuit connection of the substation shall be determined according to the status of the substation in the power system, the planned capacity of the substation, the nature of the load, the total number of components as connected to the line and transformer, the characteristics of the device, etc. It shall meet the requirements of reliable power supply, flexible operation, convenient operation and maintenance, investment savings, ease of transition or expansion.
5.1.2 For the final wiring mode of 500kV and 750kV power distribution device, when the total number of connecting components of the circuit and transformer is 6 circuits and above, meanwhile the substation has an important position in the system, it should use one and a half circuit-breaker for wiring. When it requires fragmented operation due to system's power flow control or limiting short-circuit current, it may segment the busbar.
When using one and a half circuit-breakers for wiring, it should pair the power supply circuit with the load circuit into a string. The circuits of same name should not be configured in the same string, but they can be connected to the busbar at the same side. When there are more than two transformers, two of them are in connected in the string, whilst the other transformers may not be connected in the string but directly connected to the busbar through the circuit-breaker. 5.1.3 330kV power distribution device may be connected by the use of one and a half circuit-breaker or double busbars. When it requires fragmented operation due to system's power flow control or limiting short-circuit current, it may segment the busbar.
5.1.4 When the total number of final connecting components of 330kV ~ 750kV power distribution device is not more than 6, and the substation is a terminal substation, under the premise of meeting the operation requirements, it may use the wiring methods such as line transformer group, bridge type, single busbar or 2 circuit-breakers in the line, "transformer busbar group" where the transformer is directly connected to the busbar.
5.1.5 For the 220kV or 110kV power distribution device in 330kV ~ 750kV substation, it may use the double busbar wiring method. When the technology is economical and reasonable, it may also be connected by the use of one and a half circuit-breaker. When using the double busbar wiring and the total number of components such as transformer as connected to the outgoing line is 10 ~ 14 circuits, it may install the segmented circuit-breaker on the same busbar; to the final wiring.
For the power distribution devices o...

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