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NB/T 10192-2019 English PDF

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NB/T 10192-2019: (Current blocking busbar protection technical guidelines)
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Basic data

Standard ID NB/T 10192-2019 (NB/T10192-2019)
Description (Translated English) (Current blocking busbar protection technical guidelines)
Sector / Industry Energy Industry Standard (Recommended)
Classification of Chinese Standard K45
Word Count Estimation 13,176
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

NB/T 10192-2019: (Current blocking busbar protection technical guidelines)

---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 guide for current blocking busbar protection ICS 29.240.01 K 45 NB Energy Industry Standards of the People's Republic of China Technical guidelines for current blocking busbar protection 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration

Table of contents

Foreword...III 1 Scope...1 2 Normative references...1 3 Terms and definitions...1 4 General...2 5 Technical requirements...2 5.1 Environmental conditions...2 5.2 Rated electrical parameters...3 5.3 Accuracy and variation...3 5.4 Switch input and output...3 5.5 Overload capacity...3 5.6 Power consumption...3 5.7 Mechanical requirements...3 5.8 Insulation requirements...3 5.9 Electromagnetic compatibility...3 5.10 Safety requirements...4 5.11 Continuous power-on...4 5.12 Humidity and heat resistance...4 5.13 Record function...4 5.14 Time synchronization function...4 5.15 Communication function...4 6 Protection function...4 6.1 Composition of busbar protection...4 6.2 Locking element...4 6.3 Discriminating components...5 6.4 Protection action logic...5 6.5 Actions and alarm signals...5 6.6 Pressure plate setting...5 6.7 Performance indicators...5 7 Test method...6 7.1 Test conditions...6 7.2 Test system...6 7.3 Test items and test methods...6 Appendix A (informative appendix) Bus protection configuration and the relationship between the blocking element and the discrimination element...9 Appendix B (Normative Appendix) Test System...10

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by China Electrical Equipment Industry Association. This standard is under the jurisdiction of the National Standardization Technical Committee for Measuring Relays and Protection Equipment (SAC/TC154). This standard was drafted by Xu Ji Electric Co., Ltd., Xuchang Kaipu Electric Research Institute, Nanjing Nanrui Relay Electric Co., Ltd., China Electric Nanjing Automation Co., Ltd., Beijing Sifang Relay Automation Co., Ltd., State Grid Henan Electric Power Company Electric Power Research Institute, Yunnan Power Grid Co., Ltd. Electric Power Research Institute, Jicheng Electronics Co., Ltd., Chongqing New Century Electric Co., Ltd., State Grid Liaoning Provincial Electric Power Co., Ltd., State Grid Jiangsu Electric Power Co., Ltd., State Grid Henan Electric Power Company, State Grid Hebei Electric Power Co., Ltd., State Grid Zhejiang Jiang Province Electric Power Co., Ltd., State Grid Shandong Electric Power Company, Yunnan Power Grid Co., Ltd. Kunming Power Supply Bureau, State Grid Zhejiang Electric Power Co., Ltd. Company Electric Power Research Institute, State Grid Gansu Electric Power Company Electric Power Research Institute, Xuchang Cape Testing and Research Institute Co., Ltd., State Grid Electric Power Research Institute Co., Ltd., Schneider Electric (China) Co., Ltd. Shanghai Branch, State Grid Shanghai Electric Power Company Institute, State Grid Chongqing Electric Power Research Institute. The main drafters of this standard. Zhu Ruosong, Yang Huixia, Ding Jie, Hu Bing, Nie Juanhong, Han Wei, Shen Xin, Zhu Jianhong, Zhang Taiqin, Yu You, Xu Yunlong, Chen Hao, Du Xingwei, Zhang Xiling, Xiao Yan, Geng Hong, Li Jing, Li Yong, Fang Fang, Guo Wenke, Zhao Huayun, Yang Jia, Xing Jinlei, Du Yuxin and Wang Hongbin. Technical guidelines for current blocking busbar protection

1 Scope

This standard specifies the technical requirements, protection functions and test methods of current-blocking busbar protection. This standard is applicable to busbar protection in single bus, single bus section or single bus three section wiring mode with voltage levels of 35 kV and below, as electrical The basis of current blocking bus protection (hereinafter referred to as bus protection) research and development, design, manufacture, test and application.

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 2887-2011 General Specification for Computer Site GB/T 2900.1 Basic terminology for electrical engineering GB/T 2900.17 Electrical terminology measuring relay GB/T 2900.49 Electrician Terminology Power System Protection GB/T 2900.59 Electrical terminology power generation, transmission and distribution substation GB/T 4208 Shell protection grade (IP code) GB/T 7261-2016 Basic test methods for relay protection and safety automatic devices GB/T 11287 Electrical Relay Part 21.Vibration, Shock, Impact and Seismic Tests of Measuring Relays and Protection Devices Article 1.Vibration Test (Sine) GB/T 14537 Impact and collision test for measuring relays and protection devices DL/T 478-2013 General technical requirements for relay protection and safety automatic devices DL/T 526-2013 Technical requirements for automatic standby power supply device

3 Terms and definitions

GB/T 2900.1, GB/T 2900.17, GB/T 2900.49, GB/T 2900.59, DL/T 478-2013, DL/T 526 -2013 defined and the following terms and definitions apply to this document. 3.1 Main power supply bay Independent power interval for supplying power to load or bus during normal operation. 3.2 Non-main power supply bay non-main power supply bay Other intervals besides the main power supply interval on the bus of the substation, including feeder interval, capacitor interval, section interval and small power source interval Wait. 3.3 Current blocking busbar protection Take the main power supply interval over-current start as the judgment condition, and combine with the blocking signal of the busbar non-main power supply interval to realize the bus fault identification And fast isolation protection.

4 General

4.1 The busbar protection should act correctly when a fault occurs in the busbar protection zone, and should not malfunction when a fault occurs outside the protection zone. 4.2 After the busbar protection is activated, it should be locked for automatic switching. 4.3 The blocking signal of the busbar protection should be transmitted by means of communication (such as GOOSE). When the communication transmission fails, the bus protection should not malfunction, And can send out an alarm signal. 4.4 The action delay of busbar protection should be adjustable. 4.5 The action logic of the bus protection can be realized by an independent bus protection device (hereinafter referred to as the device), or it can be integrated in the main power supply protection In the device.

5 Technical requirements

5.1 Environmental conditions 5.1.1 Normal working atmospheric conditions The requirements for normal working atmosphere are as follows. a) Ambient temperature. -10 ℃～55 ℃; b) Relative humidity. 5% to 95% (there is neither condensation nor freezing inside the device); c) Atmospheric pressure. 80 kPa～106 kPa. 5.1.2 Reference test atmospheric conditions The atmospheric conditions of the benchmark test are as follows. a) Ambient temperature. 20 ℃±5 ℃; b) Relative humidity. 45%～75%; c) Atmospheric pressure. 86 kPa～106 kPa. 5.1.3 Environmental conditions for storage and transportation The storage and transportation environment requirements are as follows. a) The storage environment temperature is -25 ℃～55 ℃, and the relative humidity is not more than 85%; b) The transportation environment temperature is -25 ℃～70 ℃, and the relative humidity is not more than 85%. 5.1.4 Surrounding environment The surrounding environment should also meet the following requirements. a) When the device is installed, there should be no vibration that exceeds the severity level 1 specified in GB/T 11287 at the place of use. Impacts and collisions that exceed the severity level 1 specified in GB/T 14537; b) The place of use should be free of explosive substances, and there should be no serious molds; c) All reliable grounding points at the installation site shall meet the requirements of 5.8 in GB/T 2887-2011. 5.1.5 Special environmental conditions When the environmental conditions specified in 5.1.1 ~ 5.1.4 are exceeded, it is determined by the user and the manufacturer. 5.2 Rated electrical parameters 5.2.1 DC working power supply The DC working power supply of the device shall meet the following requirements. a) Rated voltage. 220 V, 110 V; b) Allowable deviation. -20%～15%; c) Ripple coefficient. not more than 5%. 5.2.2 Incentive The excitation amount of the device shall meet the requirements of 4.2.2 in DL/T 478-2013. 5.3 Accuracy and variation The accuracy and variation of the device should comply with the regulations in DL/T 478-2013 4.3. 5.4 Switch input and output The switch input and output of the device shall comply with the provisions of DL/T 478-2013 in 4.5. 5.5 Overload capacity The overload capacity of the device shall meet the requirements of 4.6 in DL/T 478-2013. 5.6 Power consumption The power consumption of the AC circuit of the device shall comply with the regulations in 4.7 of DL/T 478-2013. 5.7 Mechanical requirements 5.7.1 Structure and appearance 5.7.1.1 The structure and appearance of the device shall meet the requirements of 4.10.1 in DL/T 478-2013. 5.7.1.2 The nameplate of the device should contain an identification code representing the device. 5.7.2 Device housing The enclosure of the device shall meet the requirements of 4.10.2 in DL/T 478-2013. 5.7.3 Grounding The grounding of the device shall meet the requirements of 4.10.3 in DL/T 478-2013. 5.7.4 Mechanical vibration, shock and collision requirements The mechanical vibration, shock and collision performance of the device should meet the requirements of 4.10.4 in DL/T 478-2013. 5.8 Insulation requirements The insulation performance of the device should meet the requirements of 4.9 in DL/T 478-2013. 5.9 EMC requirements The electromagnetic compatibility performance of the device should meet the requirements of 4.8 in DL/T 478-2013. 5.10 Safety requirements The safety performance of the device should be able to meet the requirements of Chapter 6 of DL/T 478-2013. 5.11 Continuous power-on After the device has been debugged, it shall be subjected to continuous energization test according to 7.13 of DL/T 478-2013. 5.12 Humidity and heat resistance The device shall meet the damp and heat resistance test requirements specified in 7.3.8 and 7.3.9 of DL/T 478-2013. 5.13 Record function 5.13.1 The device shall have a fault record function, and keep more than 8 latest operation reports. Each action report should include the input mode The pseudo quantity and switch quantity, output switch quantity, action element, and action time shall contain at least 2 cycles before the failure and 6 cycles after the failure. The recording resolution is not less than 20 points/week, providing comprehensive data information for analyzing protection actions, and can be output in COMTRADE data format Out. 5.13.2 The device should be able to record the change of fixed value, pressing plate operation, protection action information, alarm information and external switch value changes in chronological order. Bit information. 5.13.3 The device record should not be lost when the DC power supply fails. The fault information record shall be overwritten in chronological order and shall not be deleted manually. except. 5.14 Time synchronization function 5.14.1 The device should have a time synchronization interface. 5.14.2 The device should have a hardware clock circuit, and the hardware clock should work normally when the device loses DC power. 5.14.3 The accuracy of the device clock. 24 h does not exceed ±5 s; after clock synchronization, the error does not exceed ±1 ms. 5.15 Communication function The device shall have the function of information interaction with the monitoring system. 5.16 Print function The device should be capable of printing.

6 Protection function

6.1 Composition of busbar protection The busbar protection is composed of two parts. the discrimination element and the blocking element. The blocking element is used to identify the interval failure of the non-main power supply. After the source interval fails, the blocking signal will be sent to the discrimination element to block the bus protection instantly. The discrimination component combines the blocking signal to identify the bus fault, And drive the corresponding export according to the discrimination result. Locking elements with small power supply and segmented intervals should be provided with directions, and locking elements with other intervals can be without squares. Direction, the discrimination element can be blocked by the voltage element. Refer to Appendix A for bus protection configuration and the relationship between the blocking element and the discrimination element. 6.2 Locking element 6.2.1 Blocking bus protection signal Locking components are set at intervals of non-main power supply, which can be switched on and off by the control word. When any phase overcurrent of the non-main power supply interval protection starts, The interval protection of non-main power supply instantaneously outputs the "blocking bus protection" signal. If the fault disappears, the blocking signal will be recovered instantly; any over-current protection After the protection action, if the fault does not disappear, the blocking signal will be recovered after a fixed delay. For conventional substations, the "blocking bus protection" signal can be hard contact output or communication transmission (such as GOOSE at the station control layer) signal). For smart substations, the "blocking bus protection" signal is the GOOSE signal, which is transmitted to the judge through the process layer network or the station control layer network. Other components. For small power supply and segment intervals, the blocking element should be a directional overcurrent element. 6.2.2 Blocking signal disconnection processing When the blocking signal is transmitted by communication, the protection may lose its selectivity when the link that transmits the blocking signal is disconnected. Set the non-main power supply interval blocking signal broken link alarm function, when any blocking signal is broken, the bus protection is blocked. 6.2.3 Inconsistent maintenance When the "blocking bus protection" signal is transmitted by communication, when the inspection status of the device where the discrimination component and the blocking component are inconsistent The bus protection should be alarmed but not blocked. 6.3 Discriminating components The identification component combines the main power supply interval protection phase overcurrent start (can be blocked by the voltage component) and the blocking signal from the non-main power supply interval Identify bus failures. 6.4 Protection action logic When there is no small power supply and section interval, or the blocking elements of the small power supply and section interval protection both have directions, the current element of the main power supply interval After the component meets the operating conditions and does not receive the blocking signal, it starts to count, and the busbar protection operates after the delay time to switch to the main power supply. When the blocking element of the small power supply or section interval protection does not have a direction, the busbar protection does not pass the blocking signal of the small power supply or section interval protection Confirm that the current components of the main power supply interval meet the operating conditions and start timing after not receiving the blocking signal of other intervals. The busbar protection is the first The time limit outlet jumps to a small power source or segment interval without direction, and the second time limit outlet jumps to the main power supply. When the busbar protection is realized by an independent device, it can integrate the action of the main power supply interval current components of each busbar at the voltage level and the non-main power supply Source interval blocking signal realizes protection action logic based on multiple interval information. 6.5 Action and alarm signal The busbar protection shall have the busbar protection action signal and the blocking signal for long-term alarm. When the blocking signal is transmitted by communication Lock signal broken link alarm and maintenance inconsistency alarm. 6.6 Pressure plate setting The pressure plate should be thrown and retracted at intervals on the device where the discrimination element is located. When the interval pressure plate is turned on, the interval blocking signal participates in the bus Protection logic; when the bay pressing plate exits, the bay blocking signal does not participate in the bus protection logic. 6.7 Performance Index 6.7.1 Technical requirements Performance indicators should meet the following requirements. a) Current setting error. the action accuracy error does not exceed ±5% or the absolute error does not exceed 0.02IN (rated current); b) Voltage setting error. the error of the action accuracy does not exceed ±5% or the absolute error does not exceed 0.002UN (rated voltage); c) Busbar protection delay error. under the condition of 1.2 times the busbar overcurrent setting value, it does not exceed ±1% or ±40 ms. d) The inherent action delay of the blocking signal. Under the condition of 1.2 times the phase overcurrent setting value, the time of sending the blocking signal is not more than 40 ms. e) The return delay error of the blocking signal is not more than 40 ms. 6.7.2 Blocking signal transmission requirements When the blocking signal is transmitted by communication, the total transmission time of the blocking signal should not be greater than 20 ms.

7 Test method

7.1 Test conditions 7.1.1 Unless otherwise specified, all tests shall be carried out under the atmospheric conditions of the reference test specified in 5.1.2. 7.1.2 The device under test and the tester should be well grounded. 7.1.3 Unless otherwise specified, the surrounding environment should meet the requirements specified in 5.1.4. 7.2 Test system Use the test system shown in Appendix B to test the protection function. 7.3 Test items and test methods 7.3.1 Blocking signal action and return Simulate feeder faults respectively, and test the action and return of the blocking signal should meet the requirements of 6.2.1. The feeder interval overcurrent protection is activated, and check whether the blocking signal of the feeder interval protection is issued; When the fault is removed, check whether the blocking signal of the feeder bay protection returns; After the feeder bay protection is activated, the fault has not disappeared. Check whether the feeder bay protection blocking signal returns. 7.3.2 Network disconnection Simulate the network disconnection, and then simulate the busbar fault, the busbar protection should be reliably blocked and should not malfunction. 7.3.3 Inconsistent maintenance The simulation judges that the maintenance status of the device where the component and the locking component are inconsistent, and check whether the busbar protection issues an inconsistent maintenance alarm. Of course After simulating a fault in the busbar area, the protection should operate reliably; simulating a fault outside the busbar protection area, the protection should be reliable and not malfunctioning. 7.3.4 Bus protection action logic According to the requirements of 6.4, respectively simulate the fault in the bus protection zone and the fault outside the zone, and check the action of the bus protection. 7.3.5 Performance Index According to the requirements of 6.7.1, respectively simulate the fault in the bus protection zone and the fault outside the zone, and check the current and electrical Pressure setting error and delay error. According to the requirements of 6.7.2, simulate the fault outside the busbar area and check the transmission delay of the blocking signal. 7.3.6 High temperature running test According to the requirements of 5.1.1, according to the method specified in 7.3.3 of DL/T 478-2013. 7.3.7 Low temperature running test According to the requirements of 5.1.1, according to the method specified in 7.3.4 of DL/T 478-2013. 7.3.8 Temperature change test According to the requirements of 5.1.1, according to the method specified in 7.3.7 of DL/T 478-2013. 7.3.9 Temperature storage test According to the requirements of 5.1.2, according to DL/T 478-2013 7.3.5, 7.3.6.After the test, the material of the parts should not be If the damage is irrecoverable, the power-on operation should be normal. 7.3.10 Structural and visual inspection The structure and appearance of the device should meet the requirements of 5.7.1 and Chapter 5 of GB/T 7261-2016. 7.3.11 Accuracy and variation check Use relay protection test equipment to check the accuracy and variation of the measuring components of the device, and it should meet the requirements of 5.3. 7.3.12 Power consumption According to the requirements of 5.6, according to the regulations and methods in Chapter 8 of GB/T 7261-2016, carry out power consumption test on the device. 7.3.13 Switch input and output According to the requirements of 5.4 and the regulations and methods in 6.7 of GB/T 7261-2016, the switch input and output tests are performed on the device. 7.3.14 Overload capacity According to the requirements of 5.5, the overload capacity test shall be carried out in accordance with the provisions of 7.11 in DL/T 478-2013.After the device is subjected to the overload test, there should be no Insulation damage, its function and performance should comply with the provisions of Chapter 5 and Chapter 6. 7.3.15 DC power supply influence test According to the requirements of 5.2.1, according to the regulations and methods in Chapter 11 of GB/T 7261-2016, carry out the power influence test on the device. In the experiment, The device should not malfunction. 7.3.16 Insulation performance test According to the requirements of 5.8 and the provisions and methods in 7.7 of GB/T 478-2013, perform impulse voltage test and dielectric strength test on the device And measure the insulation resistance. 7.3.17 Humidity and heat resistance test In accordance with the requirements of 5.12, the device shall be subjected to damp and heat resistance test according to the regulations and methods in 7.3.8 and 7.3.9 of DL/T 478-2013. 7.3.18 EMC performance test According to the requirements of 5.9 and the regulations and methods in 7.4 of DL/T 478-2013, the device shall be tested for electromagnetic compatibility. 7.3.19 Mechanical performance test Perform mechanical performance test according to 5.7.4. a) Vibration test. According to the regulations and methods of GB/T 11287, conduct vibration response test and vibration endurance test on the device; b) Impact test. Perform impact response test and impact durability test on the device according to the regulations and methods of GB/T 14537; c) Crash test. Carry out a crash test on the device according to the regulations and methods of GB/T 14537. 7.3.20 Safety requirements According to the requirements of 5.10, the safety test of the device is carried out according to the provisions and methods of 7.16 in DL/T 478-2013. 7.3.21 Record function According to the requirements of 5.13, test the recording function of the device. The test method is stipulated by the company's product standard. 7.3.22 Time synchronization function According to the requirements of 5.14, the device clock performance is tested in accordance with the method specified in 6.9.2 of GB/T 7261-2016. 7.3.23 Communication function According to the requirements of 5.15, test the communication function of the device according to the method specified in Chapter 18 of GB/T 7261-2016. 7.3.24 Continuous power-on test According to the requirements of 5.11, the device should be energized before leaving the factory. The test method is stipulated by the company's product standard. 7.3.25 IP protection level test According to the requirements of 5.7.2, carry out the test according to the method specified in GB/T 4208. AA

Appendix A

(Informative appendix) Bus protection configuration and the relationship between the blocking element and the discrimination element The busbar protection is connected to the main power supply interval on a section of the busbar and the non-main power supply interval such as small power supply, section, feeder, capacitor. Busbar protection The blocking elements of the protection are scattered in the in...

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