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DL/T 2040-2019: Technical specification for 220 kV substation load transfer equipment
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Technical specification for 220 kV substation load transfer equipment
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DL/T 2040-2019
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Basic data | Standard ID | DL/T 2040-2019 (DL/T2040-2019) | | Description (Translated English) | Technical specification for 220 kV substation load transfer equipment | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | K45 | | Classification of International Standard | 29.240 | | Word Count Estimation | 21,232 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | National Energy Administration | | Summary | This standard specifies the specifications and requirements to be followed by 220 kV voltage level load transfer devices (devices for short) of 220 kV substations, including device configuration principles, technical principles, technical conditions, functions, and design requirements. This standard applies to the design, manufacture, commissioning, operation and maintenance of 220 kV voltage level load transfer devices in 220 kV substations. 110 (66) kV voltage level load transfer device can be implemented by reference. | DL/T 2040-2019: Technical specification for 220 kV substation load transfer equipment---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical specification for 220kV load transfer equipment
ICS 29.200
K 45
Record number. 63143-2018
People's Republic of China Electric Power Industry Standard
Technical specification for 220kV substation load transfer device
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 General principles...2
4.1 Device configuration principles...2
4.2 Device technology principles...2
5 Device technical conditions...4
5.1 Measurement accuracy requirements...4
5.2 Safety requirements...4
5.3 Insulation performance...4
5.4 Heat and humidity resistance...4
5.5 Electromagnetic compatibility...4
5.6 Mechanical properties...4
5.7 Continuous power-on...4
5.8 Static and dynamic simulation...4
6 Device function...4
6.1 Function overview...4
6.2 Charging (function opening) conditions of the device...5
6.3 Starting and operating conditions of the device...5
6.4 Discharge (function lockout) conditions of the device...5
7 Design requirements for device screen cabinet and external access...5
7.1 Requirements for the device screen cabinet...5
7.2 DC power requirements...5
7.3 Design requirements for analog circuits...5
7.4 Requirements for switch contacts...5
7.5 Requirements for setting the pressure plate of the device...6
Appendix A (informative appendix) Typical functions of 220kV load transfer device...7
Appendix B (informative appendix) 220kV load transfer device typical input and output...8
Appendix C (informative appendix) 220kV load transfer device typical setting and setting principles...11
Appendix D (informative appendix) Typical information output of 220kV load transfer device...13
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation".
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the National Grid Operation and Control Standardization Technical Committee (SAC/TC446).
This standard was drafted by. State Grid Zhejiang Electric Power Co., Ltd., Guangdong Power Grid Co., Ltd., State Grid Zhejiang Electric Power Co., Ltd.
Shaoxing Power Supply Company, State Grid Shanghai Electric Power Company, Shenzhen Power Supply Bureau Co., Ltd., Nanjing Nanrui Relay Electric Co., Ltd., Beijing Sifang
Jibao Automation Co., Ltd., Jiangsu Huaruitai Technology Co., Ltd., Xu Ji Electric Co., Ltd., Guodian Nanjing Automation
Co., Ltd., Changyuan Shenrui Relay Automation Co., Ltd., State Grid Zhejiang Electric Power Co., Ltd. Ningbo Power Supply Company, State Grid Zhejiang Province
Electric Power Co., Ltd. Jinhua Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd. Lishui Power Supply Company, State Grid Zhejiang Zhuji Power Supply Co., Ltd.
Division, State Grid Zhejiang Electric Power Co., Ltd. Electric Power Research Institute.
The main drafters of this standard. Xiang Zhongming, Sun Weizhen, Zhang Jing, Chen Jinchang, Zhang Feng, Xu Qifeng, Yang Wenjia, Chen Xinghua, Yang Yinguo,
Xia Shangxue, Luo Gang, Xie Dong, Wang Bo, Yang Caiming, Wu Huahua, Wang Weihong, Ye Lin, Xu Yongyuan, Huang Chunguang, Zhou Caiqi, Guan Li, Ma
Xiang, Lv Leiyan, Yang Ying, Zhou Zhengyang, Fang Tianyu, Zhan Zhenbin, He Xiaofeng, Ren Zuyi, Niu Shengnan, Wu Xiaodong, Mao Lin, Li Yuping,
Zhou Yang, Gong Xiangyang, Zhang Lei, Yang Jingping, Wang Wei, Sun Yanbin, Pan Wulue, Yang Tao, Yang Xiaolei, Yu Yinshu, Zhong Chuli, Yang Xiaosong,
Yang Shengbo, Yang Qingsong, Fu Wencai, Yang Dong, Wu Guobing.
This standard was issued for the first time.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of the China Electricity Council (Baiguang Road 2nd, Beijing)
Article No. 1, 100761).
Technical specification for 220kV substation load transfer device
1 Scope
This standard specifies the specifications and requirements that the 220kV voltage level load transfer device of 220kV substations should follow, including the original configuration of the device
Rules, technical principles, technical conditions, functional requirements and design requirements.
This standard applies to the design, manufacture, commissioning, operation and maintenance of 220kV voltage level load transfer devices in 220kV substations. 110 (66)
The kV voltage level load transfer device can be implemented by reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 14285 Technical Regulations for Relay Protection and Safety Automatic Equipment
GB/T 14598.24 General format requirements for power system transient data exchange (COMTRADE)
DL/T 478 General technical requirements for relay protection and safety automatic devices
DL/T 526 Technical requirements for automatic standby power supply device
DL/T 667 Telecontrol equipment and system
DL/T 720 Power system relay protection and safety automatic device cabinet (screen) general technical conditions
DL/T 860 Substation communication network and system
3 Terms and definitions
The following terms and definitions defined in DL/T 526 apply to this standard. For ease of use, the following repeated lists in DL/T 526
Some terms and definitions of
3.1
Main power supply
An independent power source that supplies power to the load or bus during normal operation.
[DL/T 526, Terms and Definitions 3.3]
3.2
Standby power supply
An independent power supply that restores power to the load or bus after it is switched on.
[DL/T 526, Terms and Definitions 3.4]
3.3
Main power supply line
An independent power line that supplies power to the load or bus during normal operation.
3.4
Standby power supply line
An independent power line that restores power to the load or bus after it is switched on.
3.5
Automatic transfer function of standby power supply line
When the main power supply circuit loses power and the operating bus loses voltage, it will automatically turn on the standby power circuit to restore the load or control the bus power supply
Features.
3.6
Automatic transfer function of bus tie circuit breaker
In the bus split operation mode, when all the main power supply lines on any bus section are lost, the bus tie (section) circuit breaker is automatically switched on
Restore the control function of load or bus power supply.
3.7
Load transfer equipment
The load transfer device (hereinafter referred to as the device) means that one or more times of the main power supply are automatically switched on after the main power supply is lost, so as to increase the system supply.
The function of the electrical reliability device is mainly divided into the line backup automatic switch and the bus tie (section) backup automatic switch function.
4 General principles
4.1 Device configuration principles
4.1.1 The device is generally configured at the hierarchical partition point of the 220kV grid, and should be configured independently according to the principle of dualization.
4.1.2 Newly built, rebuilt and expanded substations can be constructed simultaneously as required.
4.2 Principles of device technology
4.2.1 The device shall meet the relevant requirements of GB/T 14285, DL/T 526 and DL/T 860.
4.2.2 The device should have line backup automatic switching function and bus coupler (segment) backup automatic switching function. Typical 220kV substation 220kV voltage level negative
See Appendix A, Appendix B and Appendix C for examples of load transfer device functions, input and output, and setting settings.
4.2.3 The device should be equipped with a total function pressure plate. After the general function pressing plate is withdrawn, the tripping and closing exit of the locking device and the control logic function will be different.
Normal, input quantity display and other functions remain normal; after the general function pressing plate is put in, the load transfer function of the device is opened.
4.2.4 The device should be equipped with a component maintenance pressure plate. When the component maintenance pressure plate is put in, the device function logic should determine that the component is in maintenance status
state.
4.2.5 The device should be equipped with closing and tripping outlet pressure plates respectively. When the outlet pressure plate is put in, the closing and tripping of the device can act on the actual
breaker.
4.2.6 When the main power supply of the substation loses power and there is no other blocking action condition, the device shall cut off the main power
After the power source is reliably disconnected, the standby power source is automatically turned on.
4.2.7 The line backup automatic switching strategy should be flexibly adjustable through fixed value.
4.2.8 After the device is operated, it shall have the function of local and remote return. The signal is reset and the conditions for re-action are met before the next action is allowed.
Made.
4.2.9 The device should have the function of unloading the grid-connected power supply of the substation and the function of load shedding.
4.2.10 When receiving external blocking signals such as bus differential or failure protection action, the device should be reliably blocked without action.
4.2.11 The device shall have the function of detecting abnormal position of the circuit breaker. When the abnormal position of the circuit breaker is judged, the alarm signal shall be delayed and the operation shall be blocked.
Work function.
4.2.12 The device shall have the function of detecting the disconnection of the secondary circuit of the voltage transformer, and shall send out the PT disconnection signal when the disconnection occurs.
4.2.13 Multiple criteria should be used for device startup and operation.
4.2.14 The device should be able to automatically identify the bus on which the line is running, by collecting the bus voltage after line switching or the line isolation switch
Location and other ways to achieve.
4.2.15 The device should have software and hardware monitoring functions, can automatically monitor the working status of software and hardware, and can automatically report abnormalities and failures found.
Alarm and record abnormal fault information.
4.2.16 After the power supply of the device is restored to normal, the operation indication signal of the device should be able to be displayed again.
4.2.17 All kinds of important record information of the device, including action event information and accident recording data should not be lost when the device loses power.
The device data record shall meet the following requirements.
a) The action message of the device should include the specific description of the operating conditions, status, and action process of each component before the device is started and when it occurs
Engraving, action results and other information.
b) The abnormal message of the device should include information such as the abnormal type, the abnormal start time, the abnormal disappearing time and the board where the damaged component is located.
When the detailed event record cannot be displayed in abnormal situations such as the loss of DC power supply, at least a hard contact alarm signal should be output.
c) Storage capacity requirements for device abnormality and action message event record
1) The event record requires a power-down hold function;
2) It should be possible to extract event records from the device through the serial interface or the Ethernet port;
3) Event records can be uploaded to the monitoring system.
d) Disturbance recorder function requirements
1) The format of the fault recorder should meet the relevant requirements of GB/T 14598.24;
2) It should be able to record in detail all the information of the whole process of device startup and operation;
3) The operation data record should include at least the electrical input (voltage, current, etc.), switch
Quantity, actual control quantity and control object, etc.;
4) It should be able to retrieve recorded wave data through serial interface or Ethernet port;
5) At least 8 latest motion recordings can be recorded.
4.2.18 The device should have the ability to access the online monitoring system of the safety automatic device. The device can connect the line, bus tie (section) circuit breaker
Line status, device running status and internal logic running status are uploaded to the online monitoring system of safety automatic device. The device should have remote operation
Ability. The communication data format of the communication interface should follow the unified protocol, and the DL/T 860 or DL/T 667 series standard communication should be used first
protocol. Refer to Appendix D for an example of information output of a typical 220kV substation 220kV voltage level load transfer device.
4.2.19 Device clock and time synchronization function
a) The device should be equipped with a hardware clock circuit. When the device loses power, the clock circuit should work normally.
b) The device should be equipped with a time synchronization interface with an external sign time service source. IRIG-B (DC) time code is recommended, and network time synchronization can also be used.
c) The accuracy of the device clock should meet
1) Under the time synchronization signal of the clock synchronization system, the 24-hour device clock error ≤10ms;
2) In the absence of a clock synchronization system, the clock error of the 24-hour device is ≤5s.
5 Device technical conditions
5.1 Measurement accuracy requirements
a) Allowable error of voltage measurement. ±2%UN (0.2～1.2UN).
b) Current measurement tolerance. ±2% IN (0.2～1.2IN).
5.2 Safety requirements
The safety performance of the device should comply with the relevant regulations of DL/T 478.
5.3 Insulation performance
The insulation coordination performance of the device should meet the relevant regulations of DL/T 478.
5.4 Humidity and heat resistance
The heat and humidity resistance of the device should meet the relevant regulations of DL/T 478.
5.5 Electromagnetic compatibility
The electromagnetic interference immunity and electromagnetic emission performance of the device should meet the relevant regulations of DL/T 478.
5.6 Mechanical properties
The mechanical properties of the device should meet the relevant regulations of DL/T 478.
5.7 Continuous power-on
After the device is debugged, it shall be subjected to continuous power-on test in accordance with DL/T 478.During the test, the device should work normally and the signal
The instructions should be correct, and there should be no component damage or other abnormal conditions.
5.8 Static and dynamic simulation
When necessary, the device shall be subjected to static simulation and dynamic simulation test, the device action logic shall be correct, and the signal indication shall be normal.
6 Device function
6.1 Function overview
6.1.1 Line backup automatic switch function
When the main power supply line loses power and the operating busbar loses voltage, the line backup automatic switch logic action, jump off the original main power supply line, and switch on
Backup power line, restore the power supply of the loss-of-voltage bus.
6.1.2 Bus coupler (segment) backup automatic switching function
When the double bus (single bus section) is running in parallel, the bus couple (section) backup automatic switching function is opened. All main power supply lines on any bus
After the power failure causes the busbar to lose voltage, the bus coupler (segment) prepares automatic switching logic action, trips the original main power supply line on the busbar, and closes the bus coupler
(Sectional) circuit breaker to restore power supply to the busbar under voltage loss.
6.2 Conditions for charging the device (function opening)
a) The total function pressing board is put in.
b) The line standby automatic input function or the bus coupler (segment) standby automatic input function is enabled.
c) The bus is operating normally.
d) The backup power supply is normal.
e) Open input without external blocking signal.
After meeting the above conditions and after a delay, the device is successfully charged, and the automatic switching function opens.
6.3 Starting and operating conditions of the device
a) The device is successfully charged.
b) The main power supply circuit loses power and the operating bus voltage is lower than the voltage start setting value.
c) All main power supply lines of the loss-of-voltage bus have no current.
d) Loss of voltage busbar All main power supply circuit breakers on the local side or line side voltage loss.
The device starts when the above conditions are met, and the device operates after a delay.
6.4 Discharge (function lockout) conditions of the device
External blocking signals such as when the main function pressure plate exits, the circuit breaker position is abnormal, the main power supply fails to jump, the bus difference or the failure protection action, etc.
The device discharges and its functions should be reliably blocked under any circumstances such as opening, standby automatic switching, power failure of the standby power supply, or hand tripping of the main power supply line.
7 Design requirements for device screen cabinets and external access
7.1 Requirements for the installation screen cabinet
The device screen cabinet shall meet the relevant regulations of DL/T 720, and sufficient analog and switch values shall be set according to the function logic of the device.
Based on the principle of “partitioning and terminal segmentation”, the terminal arrangement of analog quantity and switch quantity should be arranged reasonably.
7.2 DC power requirements
The load transfer device with dual configuration should adopt completely independent two sets of DC power supplies.
7.3 Design requirements for analog circuits
a) The circuit and equipment of the device should meet the relevant regulations of GB/T 14285.
b) The device should adopt protection class CT. For electromagnetic current transformers, the device current loop should be connected to the independent winding first; not available
If conditions are met, if there is an independently set fault recorder winding, it should be shared with the fault recorder (before serial connection to the recorder), if not set
The independent recording winding can be connected to the protection winding (connected in series after the protection), and the winding load should not exceed its rated capacity.
c) After the AC voltage circuit is connected to the panel cabinet, it needs to pass through the split-phase air switch and then connect to the device.
d) The sampling value of the device in the smart substation should be connected in point-to-point mode.
7.4 Requirements for digital contacts
a) The circuit breaker position signal should be taken from the circuit breaker body position signal.
b) After the device is started, the circuit connected to the main power supply line should be tripped, and it should not cause manual tripping, malfunction, reclosing or other blocking load transfer
The signal of the device.
c) The load transfer device with dual configuration should adopt the way that one set of device corresponds to one trip coil.
d) The device should be equipped with enough external locking and opening contacts.
e) In the intelligent substation, the switch values such as the position of the circuit breaker, the position of the isolation switch, and the manual trip in should be adopted GOOSE point-to-point communication method
Access the device.
f) In the smart substation, the external blocking signal such as bus differential or failure protection action should be used to access the device by GOOSE network communication.
Set.
7.5 Requirements for setting the pressure plate of the device
The device should be equipped with pressure plates for function input, component maintenance, closing and tripping outlets, allowing remote switching and retreat, and maintenance status. Conventional substations
A hard pressure plate should be set.
AA
Appendix A
(Informative appendix)
Typical functions of 220kV load transfer device
A.1 Line standby automatic switch function
A.2 Bus coupler (segmented) backup automatic switching function
BB
Appendix B
(Informative appendix)
Typical input and output of 220kV load transfer device
B.1 Analog input
B.2 Switch input
B.3 Switch output
B.4 Device pressure plate setting
Table B.5 List of device soft pressure plates
Appendix C
(Informative appendix)
220kV load transfer device typical setting and setting principle
C.1 Strategy setting
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