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DL/T 5155-2016 English PDF (DLT5155-2016)

DL/T 5155-2016 English PDF (DLT5155-2016)

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DL/T 5155-2016: Technical Code for Designing AC Station Service of 220kV~1000kV Substation

In order to make the station service design of the substation meet the national technical and economic policies, safe, reliable, economical, in line with national conditions, it hereby develops this standard. This standard is applicable to the design of the AC station service system for the newly built, extended, reconstructed 220kV ~ 1000kV substation, switch station, series compensation station. Station service design shall use energy-saving, environmentally friendly, safe, reliable electrical products which are in line with national standards.
DL/T 5155-2016
POWER INDUSTRY STANDARD OF
THE PEOPLE REPUBLIC OF CHINA
ICS 27.100
P 62
Registration number: J173-2016
P DL/T 5155-2016
Replacing DL/T 5155-2002
Technical code for design AC station service
of 220kV ~ 1000kV substation
ISSUED ON: AUGUST 16, 2016
IMPLEMENTED ON: DECEMBER 01, 2016
Issued by: National Energy Administration
POWER INDUSTRY STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
Technical code for design AC station service
of 220kV ~ 1000kV substation
Replacing DL/T 5155-2002
Main drafting organization: Electrical Planning and Design Institute
Approved by: National Energy Administration
Date of implementation: December 01, 2016
2016 Beijing
Announcement of National Energy Administration
2016 No.6
According to the relevant provisions of the ?€?Notice of the National Energy Administration on Printing and Distributing the Industrial Standardization Management Measures for Energy Sector (Trial) and Detailed Rules of
Implementation?€? (GNJKJ [2009] No.52), after review, the National Energy Administration approved 144 industrial standards such as ?€?Specification on quality acceptance of construction of conventional island and supporting facilities of nuclear power plant - Part 8: Thermal insulation and paint", including 75 energy standards (NB) and 69 power standards (DL), which are now
released.
Attachment: Industry standards catalog
National Energy Administration
August 16, 2016
Attachment:
Industrial standard catalog
No. Standard No. Standard name
Replaced
standard
Adopted
standard No.
Date of
approval
Date of
implementation
?€??€?
129 DL/T 5155-2016
Technical code for design
AC station service of 220kV
~ 1000kV substation
DL/T 5155-
2002 2016-08-16 2016-12-01
?€??€?
Table of Contents
Foreword ... 6
1 General provisions ... 8
2 Terms ... 8
3 Station service system wiring ... 9
3.1 Station service power supply ... 9
3.2 Load classification ... 10
3.3 Power supply manner ... 11
3.4 Power supply connection ... 12
3.5 Application of neutral grounding in auxiliary power system ... 12
3.6 AC uninterruptible power supply ... 13
4 Station service load analysis ... 13
4.1 Principles of load calculations ... 13
4.2 Load account procedure ... 14
5 Choice of station service transformer ... 14
6 Short-circuit current calculation and choice of electrical equipment and conductors ... 15
6.1 Short-circuit current calculation ... 15
6.2 High-voltage switchyard ... 16
6.3 Station service low-voltage equipment ... 16
6.4 Choice of conductor ... 20
6.5 Diesel-engine generators ... 20
7 Station service equipment arrangement ... 20
7.1 General requirements ... 20
7.2 Arrangement of station service transformer... 21
7.3 Arrangement of switchboard ... 22
7.4 Arrangement of diesel-engine generator ... 24
7.5 Clean energy and energy storage device ... 25
7.6 Requirements for constructions ... 25
8 Maintenance power supply ... 26
9 Protection against electric shock ... 26
10 Control, signaling, metering and automatic devices of station service system ... 27
10.1 Station service power relay ... 27
10.2 Station service power control, signaling and measure device ... 28 10.3 Metering system ... 29
10.4 Power automatic transfer switching equipment ... 29
Appendix A Load characteristic table ... 30
Appendix B Voltage-regulation calculation ... 32
Appendix C Calculation of short-circuit current in 380V power centers ... 35 Appendix D 380V feeder working current calculation ... 38
Appendix E Selection and verification of protect device and conductor ... 41 Explanation of wording in this code ... 46
List of quoted standards ... 47
Foreword ... 7
1 General provisions ... 9
2 Terms ... 9
3 Station service system wiring ... 10
3.1 Station service power supply ... 10
3.2 Load classification ... 11
3.3 Power supply manner ... 12
3.4 Power supply connection ... 13
3.5 Application of neutral grounding in auxiliary power system ... 13
3.6 AC uninterruptible power supply ... 14
4 Station service load analysis ... 14
4.1 Principles of load calculations ... 14
4.2 Load account procedure ... 15
5 Choice of station service transformer ... 15
6 Short-circuit current calculation and choice of electrical equipment and conductors ... 16
6.1 Short-circuit current calculation ... 16
6.2 High-voltage switchyard ... 17
6.3 Station service low-voltage equipment ... 17
6.4 Choice of conductor ... 21
6.5 Diesel-engine generators ... 21
7 Station service equipment arrangement ... 21
7.1 General requirements ... 21
7.2 Arrangement of station service transformer... 22
7.3 Arrangement of switchboard ... 23
7.4 Arrangement of diesel-engine generator ... 25
7.5 Clean energy and energy storage device ... 26
7.6 Requirements for constructions ... 26
8 Maintenance power supply ... 27
9 Protection against electric shock ... 27
10 Control, signaling, metering and automatic devices of station service system ... 28
10.1 Station service power relay ... 28
10.2 Station service power control, signaling and measure device ... 29 10.3 Metering system ... 30
10.4 Power automatic transfer switching equipment ... 30
Appendix A Load characteristic table ... 31
Appendix B Voltage-regulation calculation ... 33
Appendix C Calculation of short-circuit current in 380V power centers ... 36 Appendix D 380V feeder working current calculation ... 39
Appendix E Selection and verification of protect device and conductor ... 42 Explanation of wording in this code ... 47
List of quoted standards ... 48
Foreword
According to the requirements of the "Notice of National Energy Administration on the Issuance of the Compilation/Revision Plan for the first batch of Energy Industry Standard in 2010" (GNKJ [2010] No.320), the compilation team
conducted extensive investigations and studies, carefully summarized the design experiences on the station service for 220kV and above substations, absorbed the latest technological development results, solicitated extensive opinions, to revise the original "Technical code for design AC station service of 220kV ~ 500kV substation" DL/T 5155-2002.
This standard has 10 chapters and 5 appendixes. The main technical contents include general provisions; terms; station service system wiring; station service load analysis; choice of station service transformer; short-circuit current calculation and choice of electrical equipment and conductor; station service equipment arrangement; maintenance power supply; protection against electric shock; control, signaling, metering and automatic devices of station service system.
The main contents of this revision are:
1. The original standard applies to the substation which has a voltage ranging from 220kV to 500kV. In this revision, it includes the requirements for the station service of 750kV and 1000kV substations, changes the standard
name to ?€?Technical code for design AC station service of 220kV ~ 1000kV substation"
2. The original standard has 8 chapters. This revision adds two separate chapters of "terms" and "protection against electric shock"; in addition, the chapter 5 "Selection of station service transformers" in the original
standard is divided into two chapters "Station service load analysis" and "Choice of station service transformer"; move the clause 7.5 "maintenance power supply" from chapter 7 of the original standard out to form an
independent chapter; the other chapter contents are adjusted accordingly. After this revision, this standard has 10 chapters, which increases 2
chapters as compared with the original standard;
3. In the choice of station service transformer, add the requirements for voltage regulation and wiring;
4. Some substations are difficult to connect external power supply due to special geographical conditions. This revision adds the requirements for self-provided emergency power supply in the station;
5. Add the principle requirements for the application of clean energy;
6. Supplement the requirements for station service power metering devices. From the date of implementation, this standard replaces the "Technical code for design AC station service of 220kV ~ 500kV substation" DL/T 5155-2002.
For this standard, the National Energy Administration is responsible for its management; the Electrical Planning and Design Institute proposes it; the Energy Industry Power Grid Design Standardization Technical Committee is responsible for daily management; the China Power Engineering Consulting Group Huadong Electric Power Design Institute Co., Ltd. is responsible for the interpretation of specific technical contents. If you have any comments or suggestions during the implementation, please send it to the Electrical Planning and Design Institute (Address: 65 Ande Road, Xicheng District, Beijing, Zip code: 100120).
The main drafting organizations, the main drafters, the main reviewer of this standard:
The main drafting organizations: China Power Engineering Consulting
Group Huadong Electric Power Design Institute Co., Ltd.
The main drafters: Wang Xiaojing, Wang Xiangping, Yu Zheng, Hu Wenhua,
Le Dangjiu, Chen Yue, Cao Sheng, Chao Qiong, Pan Yihua, Wang Weihua,
Deng Ming, Zhang Jingfeng, Wang Weiying, Zheng Yi
Main reviewers: Li Baojin, Fang Jing, Yan Shihai, Chen Zhirong, Li
Zhenghong, Yu Kewu, Shen Aimin, Chen Hongming, Zhang Yuming, Pu Hao,
Wu Mianqiong, Kong Zhida, Qian Feng, Chen Ping, Tang Hongde
Technical code for design AC station service
of 220kV ~ 1000kV substation
1 General provisions
1.0.1 In order to make the station service design of the substation meet the national technical and economic policies, safe, reliable, economical, in line with national conditions, it hereby develops this standard.
1.0.2 This standard is applicable to the design of the AC station service system for the newly built, extended, reconstructed 220kV ~ 1000kV substation, switch station, series compensation station.
1.0.3 Station service design shall use energy-saving, environmentally friendly, safe, reliable electrical products which are in line with national standards. 1.0.4 The design of the station service system shall be based on the
characteristics and scale of the project, combining the recent period and future, to meet the short-term needs while meeting the long-term requirements.
1.0.5 In addition to complying with the provisions of this standard, the design of station service power shall also comply with the relevant national standards. 2 Terms
2.0.1
Power supply
AC power supply for long-term supply for the working load in the substation. 2.0.2
Standby supply
AC power supply which supplies power only when the power supply in the
substation is cut off.
2.0.3
Emergency power supply
An AC power supply that supplies power to the load which, in case of power failure within a limited period of time, may affect the safety of the person or cause the significant decrease of power delivery of the substation.
2.0.4
AC uninterruptible power supply
A power supply device consisting of a rectifier and an inverter, which
cooperates with a battery pack of a substation's DC power supply, to provide an uninterrupted AC power supply that meets the requirements.
2.0.5
Station service switchboard
The station service low-voltage switchboard which is powered by the station service transformer or the external low-voltage AC power supply, meanwhile distributes power to the load in the station.
3 Station service system wiring
3.1 Station service power supply
3.1.1 The station service power supply for the 220kV substation should be 2 circuits of equal-capacity and mutual-standby power supply from the low- voltage side of different main transformers, respectively. When there is only one main transformer in the initial stage, in addition to connecting 1 circuit of power supply from it, it shall also connect 1 circuit of reliable power supply from outside of the station.
3.1.2 The station service power supply for the 330kV ~ 750kV substation shall be 2 circuits of equal-capacity and mutual-standby power supply from the low- voltage side of different main transformers, respectively, as well as 1 circuit of reliable station service standby power from outside of the station. When there is only one (set) main transformer in the initial stage, in addition to connecting 1 circuit of power supply from it, it shall also connect 1 circuit of reliable power supply from outside of the station.
3.1.3 The station service power supply for the 1000kV substation shall be 2 circuits of equal-capacity and mutual-standby power supply from the low- voltage side of different main transformers, respectively, as well as 1 circuit of reliable station service standby power from outside of the station. When there is only one (set) main transformer in the initial stage, it should also connect 2 circuits of reliable power supply from two different substations.
3.1.4 The switchyard should connect 2 reliable power supplies from the outside of the station. When there is a high-voltage shunt reactor in the station, one circuit may use a high anti-extraction power supply. The configuration of the power supply for the series compensation station shall be carried out in accordance with the relevant provisions of the current power industry standard "Technical code for design of series compensator station" DL/T 5453.
3.1.5 The capacity of the station service power supply for each circuit shall meet the needs of the load power consumption of the entire station.
3.1.6 When there is no condition to connect the reliable power supply from outside of the station, it may provide a self-provided emergency power supply in the station, the capacity of which shall meet the power consumption
requirements of the type-I loads of the whole station and some type-II loads (including the load of 2 main transformers and the cooling load of high-voltage reactor of whole station).
3.1.7 The power supply voltage outside the station may use the voltage grade of 10kV ~ 66kV. When the reliability meets the requirements, it should use the power supply of lower power grades.
3.1.8 The emergency power supply in the station may adopt the fast self- starting diesel generator set. The configuration requirements shall be
implemented in accordance with the relevant provisions of the current national standard "Specific configuration of power supply and self-emergency power supply for important power users" GB 29328.
3.1.9 When a reliable clean energy power supply is installed in the station, it should give priority to it.
3.2 Load classification
3.2.1 Station service power load may be divided into the following three categories according to the impact of power outage:
Type-I load: The load which, in case of short-term power outages, may affect the safety of the person or equipment, cause the production run to stop or the main transformer to reduce the load;
Type-II load: The load which allows for short-term power outages; however, if the duration of power outage is too long, it may affect the normal production operation;
Type-III load: The load which, in case of long-term power outage, will not directly affect the production operations.
3.2.2 The commonly used station service load characteristics may be selected according to Appendix A of this standard.
3.3 Power supply manner
3.3.1 The station service power load should be directly supplied by the station service switchboard. For the important load, it shall use the double-loop power supply mode which are respectively connected to two busbars, respectively. 3.3.2 When the capacity of the station service transformer is more than 400kV ?€? A, the station service power load which is more than 50kV ?€? A should be directly supplied by the station service switchboard; the small capacity load should be centrally power-supplied locally.
3.3.3 Forced cooling device, loaded voltage-regulating device and its charged oil filtering device of main transformer and high-voltage shunt reactor should adopt the mutual-standby dual power supply according to the following methods, meanwhile the automatic mutual switchover is only achieved in the control box of the cooling device.
1. When using three-phase equipment, it should set separate dual power
supplies for each set;
2. When using a group of single-phase equipment, it should set the dual power supply for each group. The power load of each phase transformer is
connected to the switched incoming line.
3.3.4 For the main control communication building, comprehensive building, decentralized relay chamber of the 330kV ~ 1000kV substation, it may,
according to the load needs, set the dedicated sub-switchboard to supply power to local load. The dedicated sub-switchboard should use the single bus wiring. Where there is type-I load circuit, it shall use dual power supply.
3.3.5 For the operation and heating load of the circuit-breaker and the isolating switch, if it may be classified according to the voltage zone of the power distribution device, it respectively uses the following dual power supplies which are respectively connected to the two segments of station service power busbar, as follows:
1. Set the ring power supply network according to the function zone; meanwhile set the knife switch in the middle of the ring network to achieve open-loop operation;
2. Dual-circuit independent power supply, set dual power supply switchover distribution box in the function zone, to achieve radiated power supply to the interval load;
3. Dual-circuit independent power supply, wherein dual power supply
switchover device is provided in the equipment control box.
3.3.6 The station service power supply should be prioritized as the working power supply. When detecting any phase-voltage interruption, it shall, after time delay, switch the load from the working power supply to the standby power supply. When the working power supply returns to normal, it should, after time delay, automatically return from the standby power supply back to the power supply by working power supply.
3.3.7 Maintenance power supply network should adopt a single-loop branch power supply mode as divided by function zone.
3.4 Power supply connection
3.4.1 The station service power supply for the 330kV ~ 750kV substation should use the one-stage voltage-reduction mode. The station service power supply for the 1000kV substation shall, according to the voltage level at the low-voltage side of the main transformer, select the two-stage voltage-reduction mode or one-stage voltage-reduction mode. When using the two-stage voltage-
reduction mode, the middle voltage level should be consistent with the voltage level of the power supply outside the station. The high-voltage station service power supply should use the wiring method of independent-wired transformer set.
3.4.2 The rated voltage of the low-voltage system of station service power is 220V/380V. The station service power busbar adopts a single busbar
connection as classified by the working transformer, simultaneous power supply by the working busbars of adjacent two segments, as well as split ope...

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