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DL/T 2047-2019: (Technical specification for anti-stealing equipment based on primary side current monitoring)
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Basic data | Standard ID | DL/T 2047-2019 (DL/T2047-2019) | | Description (Translated English) | (Technical specification for anti-stealing equipment based on primary side current monitoring) | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | N22 | | Word Count Estimation | 26,243 | | 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 | DL/T 2047-2019: (Technical specification for anti-stealing equipment based on primary side current monitoring)
---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 the anti stealing electricity equipment based on primary current monitoring
ICS 17.22
N 22
Record number. 63143-2018
People's Republic of China Electric Power Industry Standard
Technical specification of anti-electricity stealing equipment based on primary side current monitoring
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 Functional requirements...2
5 Technical requirements...5
6 Inspection methods and requirements...11
7 Inspection rules...17
8 Nameplate, packaging, storage and transportation requirements...19
Appendix A (informative appendix) Selection table of anti-electricity stealing equipment based on primary current monitoring...21
Appendix B (Normative Appendix) Test circuit diagram of interharmonics...22
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Electric Power Industry Standardization Technical Committee (DL/T C43).
Drafting organizations of this standard. State Grid Zhejiang Electric Power Co., Ltd., State Grid Corporation of China, China Electric Power Research Institute Co., Ltd., State Grid
Chongqing Electric Power Company, State Grid Jiangxi Electric Power Co., Ltd. Electric Power Research Institute, Zhejiang Huacai Technology Co., Ltd., Beijing Xinyuan Green Network Festival
Energy Technology Co., Ltd., Beijing Zhixin Microelectronics Technology Co., Ltd.
The main drafters of this standard. Huang Rongguo, Wang Zilong, Jiao Zhiwen, Zheng Bin, Shen Jianliang, Xu Yinghui, Hou Suying, Yang Heng, Xue Yang, Yao
Li, Lu Chunguang, Yuan Jian, Hu Shuhong, Tang Di, Yi Kongming, Shi Lixin, Gao Shaojun, Wang Lizong, Liu Xiaowei, Chen Wenying, Deng Gaofeng.
This standard was issued for the first time.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Center of the China Electricity Council (Baiguang Road, Beijing
No. 100761).
Technical specification of anti-electricity stealing equipment based on primary side current monitoring
1 Scope
This standard specifies the monitoring of anti-theft equipment based on primary current in power grids with a voltage of 10kV~35kV and a frequency of 50Hz.
Capability requirements, technical requirements, inspection methods and requirements, inspection rules.
This standard is applicable to the inspection, use and in-operation inspection of anti-electricity stealing equipment based on primary-side current monitoring.
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 2423.1-2008 Environmental testing of electric and electronic products Part 2.Test method Test A. Low temperature
GB/T 2423.8-1995 Environmental testing of electrical and electronic products Part 2.Test method Test Ed. Free fall
GB/T 2423.17-2008 Environmental testing of electric and electronic products Part 2.Test method Test Ka. Salt spray
GB/T 2423.24-2013 Environmental testing of electrical and electronic products Part 2.Test methods Test Sa. Simulate solar radiation on the ground
GB/T 2828.1-2012 Sampling inspection procedure by attributes Part 1.Batch inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 4208-2017 Enclosure protection grade (IP code)
GB/T 5169.11-2006 Fire hazard test for electric and electronic products Part 11.Glow wire/hot wire basic test method
GB/T 16927.1-2011 High Voltage Test Technology Part 1.General Definition and Test Requirements
GB/T 17215.211-2006 Alternating current measuring equipment general requirements, tests and test conditions Part 11.Measuring equipment
GB/T 17626.8-2008 Electromagnetic compatibility test and measurement technology Power frequency magnetic field immunity test
GB 26859-2011 Electric Power Safety Work Regulations Power Line Part
GB/T 32856-2016 General technical requirements for high-voltage energy meters
DL/T 645 Multifunctional Energy Meter Communication Protocol
DL/T 698.45 Electric energy information acquisition and management system Part 4–5.Object-oriented interoperability data exchange protocol
DL/T 877 General requirements for the use of live working tools, devices and equipment
DL/T 1527-2016 Electricity Information Security Protection Technical Specification
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Monitoring anti-electricity stealing equipment based on primary side current
Composed of a current acquisition module and a data receiving module, it can monitor the current of the primary side line of the special transformer, and has data acquisition, processing,
Equipment with power theft or measurement abnormality judgment function.
3.2
Current acquire module
Connected to the 10kV~35kV primary side power line, it can collect and store the primary side current data, and has a communication encryption function module.
3.3
Data receiving module
The module that receives data from the current acquisition module and performs power theft or measurement abnormality judgment. It has remote and local communication functions.
4 Functional requirements
4.1 Anti-theft monitoring methods
The anti-theft device based on primary side current monitoring should work as shown in Figure 1.Monitoring through the current acquisition module installed on the primary side
Three-phase current data, and sent to the data receiving module. The data receiving module calculates the primary side apparent power and compares it with the apparent power monitored by the metering point.
If the relative error of the apparent power exceeds the set threshold, it is determined that there is electricity theft or measurement abnormality. Comparison judgment can be in the data receiving
In the module, it can also be carried out in the electric energy information collection and management system (anti-electricity theft audit monitoring platform).
4.2 Discrimination of electricity theft or abnormal measurement
4.2.1 Primary side apparent power calculation
The apparent power of primary side is calculated according to formula (1).
4.2.2 Calculation of Apparent Power of Metering Point
The apparent power of the measuring point is calculated according to formula (2).
4.2.3 Abnormal discrimination
The relative error RS of the apparent power between the primary side and the metering point is calculated according to formula (3). When RS exceeds the threshold, it is judged that the user has theft or
Abnormal measurement. The threshold can be set and is not less than 20%.
4.3 Data storage requirements
The current acquisition module should store no less than 30 minutes of data, and the storage interval can be set. The data storage space should not be less than 32k bytes.
The data receiving module should store data for no less than 60 days. The storage interval can be set. The maximum interval time should not exceed 1h.
Time stamps are required, and the time stamps of each stored record should be aligned. The data storage space should not be less than 2M bytes.
4.4 Clock call test and time synchronization function
The current acquisition module should adopt an active time synchronization method and actively apply for clock information from the data receiving module for time synchronization. Current acquisition module start
The time should be adjusted when moving, and the time should be handled at least twice a day.
The data receiving module should prepare its own clock chip and clock backup power supply. After the power supply is off, the clock should work normally. Clock error is not greater than
0.5 second/day, can accept remote clock call test and time synchronization.
4.5 Parameter setting and query function
The data receiving module should support remote and local settings and query the following parameters.
a) The real-time collection value of the current on the primary side;
b) Real-time collection value of current at the metering point;
c) The relative error RS of apparent power between the primary side and the measurement point;
d) Load curve record;
e) Configuration parameters;
f) Communication parameters.
4.6 Event record
The data receiving module should be able to classify and record events as important events and general events according to the event attributes. The content of each record includes events
The type, time of occurrence, and related quantities at the time of the event. The event classification and recording method are shown in Table 1.
4.7 Communication requirements
4.7.1 Communication data
The remote communication of the data receiving module shall meet the following requirements.
a) Send various information such as monitoring data and event records according to the set rules;
b) There are safety protection measures for all data and parameter settings.
4.7.2 Communication method
The communication method of the equipment should meet the following requirements.
a) The data receiving module has an uplink communication interface for power wireless private network or public communication network;
b) The data receiving module has local communication interfaces such as power line carrier and RS485;
c) Micro-power wireless communication is adopted between the data receiving module and the current acquisition module.
4.7.3 Communication channel
The physical layer of each communication channel should be independent, the damage of any communication channel shall not affect the normal operation of other channels, and meet the following requirements
begging.
a) The communication components of the uplink communication network should adopt a modular design. After the communication components are replaced or removed, the performance and operating parameters of the equipment itself
The number should not be affected; when replacing the communication network, only the communication components and software configuration should be replaced, not the entire device;
b) Configurable narrowband or high-speed carrier module;
c) Micro-power wireless communication should use dedicated frequency bands for civil radio;
d) Each communication interface should have a fail-safe circuit, which is electrically isolated from the internal circuit of the equipment.
4.7.4 Communication protocol
The communication protocol of the equipment should follow the DL/T 698.45 or DL/T 645 communication protocol.
4.7.5 Communication with power information collection terminal
The data receiving module can receive calls from the power information collection terminal, upload monitoring data, event records and other information.
4.8 Local functions
4.8.1 Local status indication
The data receiving module should have indicator lights to indicate the working status of the equipment, power theft or abnormal metering, and communication.
4.8.2 Local maintenance interface
The data receiving module should provide a local maintenance interface, support setting and query parameters through the local interface, and have security such as authority and password management.
Full measures to prevent unauthorized personnel from operating.
4.9 Remote upgrade
The data receiving module should be able to download and upgrade remotely online, and support breakpoint resumable transmission.
5 Technical requirements
5.1 Performance requirements
5.1.1 Reference conditions
5.1.1.1 Current acquisition module
The reference conditions are.
a) Reference current. rated current;
b) Reference frequency. 50Hz;
c) Reference temperature. 23℃;
d) Reference relative humidity. 45%～75%;
e) Air pressure. 63.0kPa～106.0kPa (at an altitude of 4000m and below).
5.1.1.2 Data receiving module
The reference conditions are.
a) Reference voltage. 57.7 V, 100 V, 220 V;
b) Reference frequency. 50Hz;
c) Reference temperature. 23℃;
d) Reference relative humidity. 45%～75%;
e) Air pressure. 63.0kPa～106.0kPa (at an altitude of 4000m and below).
5.1.2 Mechanical requirements
5.1.2.1 General requirements
The design and structure of the equipment should be able to ensure that it will not cause any damage when used under rated conditions, including certain overload conditions specified in this standard.
Danger. In particular, ensure.
a) Personal safety protection against electric shock;
b) Personal safety protection against the influence of high temperature;
c) Safety protection against flame spread;
d) Protection against solid foreign objects, dust and water;
e) All parts susceptible to corrosion shall be effectively protected under normal conditions;
f) Any protective layer should not be caused by normal operation under normal working conditions
It should not be damaged due to exposure to the air;
g) The equipment has sufficient mechanical strength and can withstand the possibility under normal working conditions
The high and low temperatures that occur. The components should be securely fastened and ensured not to loosen.
5.1.2.2 Shell and window
The shell and window should meet the following conditions.
a) The housing of the current acquisition module can meet the requirements of GB/T 2423.8-1995
Method 1."Free fall" drop height is 1000mm test related requirements, and the amount of error change after test does not exceed Table 2
1/4 of the error limit;
b) The mechanical strength of the housing and window of the data receiving module meets the requirements of 5.2.2.1 of the spring hammer test of GB/T 17215.211-2006
Claim.
5.1.2.3 Mechanical vibration and shock
The equipment should be able to withstand mechanical vibration and shock under normal operation and normal transportation conditions without causing failure and damage, and meet GB/T
17215.211 vibration and shock related requirements.
5.1.2.4 Heat and flame resistance
The materials used in the equipment should be flame-retardant, and the flame-retardant properties of the materials should meet the requirements of GB/T 5169.11 on flame retardancy.
5.1.2.5 Pull-off force
The current collection module should withstand a downward pull force not less than 8 times its overall weight in the direction perpendicular to the plane formed by the crimping mechanism.
drop.
5.1.3 Power supply
5.1.3.1 General requirements
The current acquisition module can use electromagnetic induction, battery power supply and other power supply methods.
The data receiving module should adopt AC power supply. The data receiving module should adopt universal design and can be replaced.
5.1.3.2 Power consumption
The power consumption of the current acquisition module and the data receiving module should meet the following requirements.
a) Power consumption of current acquisition module.
1) When the current acquisition module is powered by a battery, the working current is not more than 100μA in the non-communication state. In normal working condition
Under conditions, the battery can work for no less than 5 years;
2) When the current acquisition module uses electromagnetic induction to obtain power, the apparent power does not exceed 2.5VA under the rated current.
b) Power consumption of data receiving module.
1) In the non-communication state, the power supply line of the data receiving module is under reference conditions, and the active power consumption and apparent power do not exceed
Over 2W, 3VA;
2) When the power line carrier communication unit (if any) of the data receiving module is in the transmitting state, the power consumption is not more than 1.5W;
3) When the public communication network communication unit (if any) of the data receiving module is in the transmitting state, the power consumption is not more than 6W.
c) The output power of the local wireless communication unit, and the wireless output power of the communication unit between the current acquisition module and the data receiving module is not greater than
50mW.
5.1.3.3 Starting current
When using electromagnetic induction to get power, when the line current is greater than 2A, the current acquisition module should be able to start working normally.
5.1.3.4 Power supply overvoltage
When the power supply is increased to 380V, the data receiving module should not be damaged.
5.1.4 Measurement and accuracy of current acquisition module
5.1.4.1 Standard value of rated current (In)
The standard values of rated current are..200A, 300A, 400A, 500A, 600A.
5.1.4.2 Standard value of rated current expansion multiple
The standard value of the rated current expansion multiple is 1.2, 1.5, 2.
The product of rated current and rated current expansion is the rated continuous thermal current (Icth).
5.1.4.3 Effect of fault current
When abnormal current flows through the monitored power line or busbar (such as the maximum short-circuit current, etc.), the current acquisition module should not be damaged. installed at
The recommended fault current test values of the current acquisition module on the 10kV～35kV line are 16kA, 20kA, 25kA, 31.5kA.
5.1.4.4 Measuring range
Current measurement range. 0.05In～Icth.
5.1.4.5 Accuracy
The equipment current measurement accuracy grades are. 1 and 3, and the error limit of each grade should meet the requirements of Table 2.
5.1.4.6 Influence
The amount of additional error change caused by the change relative to the reference condition should meet the requirements of Table 3.
5.1.4.7 Up and down variation
When the current acquisition module is in the process of current rise and current fall, the measurement result of the same current percentage error is called rise and fall, and rise and fall.
The difference shall meet the requirements of 6.4.3 of this standard.
5.1.4.8 Installation and disassembly error
The current acquisition module is normally installed and disassembled 30 times, and the error should meet the requirements of 6.6.4 of this standard.
5.1.4.9 Self-heating influence
In the case of continuous rated continuous thermal current, the error of the current acquisition module within 20 minutes does not exceed the requirements of Table 4 to reach a stable state
Under the state, the error change caused by self-heating should not exceed the limit specified in Table 5.
5.1.5 Insulation performance requirements
5.1.5.1 Insulation strength
The power supply, the communication circuit to the ground and the circuits of electrical isolation shall withstand the AC voltage of 50 Hz as specified in Table 6.
Dielectric strength test for 1 min. During the test, no breakdown or flashover shall occur, and the leakage current shall not exceed 5 mA.
5.1.5.2 Impulse voltage
The power supply, communication circuit to the ground and each circuit of electrical isolation shall withstand the impulse voltage as specified in Table 7, with the positive and negative polarity of each
5 times. There should be no destructive discharge (fire flashover, flashover or insulation breakdown) during the test.
5.1.6 Temperature rise requirements
5.1.6.1 Temperature rise of current acquisition module
Under the specified rated continuous thermal current and reference frequency, when the ambient temperature is 40℃, the temperature rise of the outer surface of the current acquisition module does not exceed
25K.
5.1.6.2 Temperature rise of data receiving module
When the power supply line is loaded with 1.15 times the reference voltage and reference frequency and the ambient temperature is 40℃, the external surface of the data receiving module
The temperature rise does not exceed 25 K.
5.1.7 Electromagnetic compatibility requirements
The equipment should be able to withstand the test in Table 8 without crashes, information changes or equipment damage.
5.2 Information security requirements
5.2.1 General requirements
The information security of equipment data transmission shall meet the relevant requirements of 7.5 of DL/T 1527-2016.
5.2.2 Safety protection
The equipment shall use the hardware security module approved by the National Cryptography Administration to realize data encryption and decryption, and the hardware security module shall support the national password
Symmetric and asymmetric cryptographic algorithms approved by the Authority.
5.2.3 Secure medium
The current acquisition module and data receiving module should be embedded in the hardware security module for information exchange security certification. Through solid media or virtual media
Perform parameter setting and information reading on the data receiving module. Data transmission should pass the hardware security module for security authentication, data encryption and decryption
Processing to ensure the safety and integrity of data transmission.
5.2.4 Encryption and decryption algorithm
The hardware security module approved by the National Cryptography Administration should be used in the equipment to achieve security certification and data protection. The hardware security module should be the same
There are symmetric cryptographic algorithms and asymmetric cryptographic algorithms recognized by the National Cryptographic Administration.
5.2.5 Communication channel security
The local and remote communication channels used by the equipment should be used for access authentication and confidentiality protection measures based on password technology for data
Transmission and shall meet the following requirements.
a) Before the communication parties conduct data exchange, adopt security module and cryptographic technology
Carry out safety certification;
b) The communication parties should use security modules and cryptographic technology to control the current data,
Integrity protection is provided for the transmission of time correction data and parameter settings, and the cryptographic algorithm adopts the symmetric cryptographic algorithm approved by the National Cryptographic Administration
And asymmetric cryptographic algorithms.
5.3 Electricity safety requirements
5.3.1 General requirements
The installation and operation of the equipment shall comply with the relevant requirements of GB 26859-2011 10.3, 11.1 and DL/T 877, and shall not harm electricity
The normal operation of the network is safe.
5.3.2 Power grid safety requirements
The operation, installation and disassembly of the current acquisition module should not cause damage to the power grid equipment or cables, and affect the utility of the power grid equipment or cables.
can.
The data receiving module should not affect the metering, monitoring, and protection functions of the access loop.
5.3.3 Installation and disassembly requirements
The current acquisition module should meet the requirements for installation and disassembly without power failure, and the live working tools and equipment equipped should meet the relevant requirements of DL/T 877
Requirement, installation and disassembly should not cause single-phase grounding or inter-phase short-circuit failure of high-voltage equipment.
5.4 Conditions of use
5.4.1 Temperature range
The temperature range of the equipment is shown in Table 9.
5.4.2 Relative humidity
The equipment should withstand the climatic conditions specified in Table 10.For the test of temperature and humidity combination, see the alternating damp heat test.
5.4.3 Climate
5.4.3.1 Climate environment of current acquisition module
It shall meet the relevant requirements of 6.5.2 high temperature test, 6.5.3.1 low temperature test and 6.5.4.1 variable damp heat test of this standard.
5.4.3.2 Climate environment of data receiving module
It shall meet the relevant requirements of Article 6.3.2 to Article 6.3.4 of GB/T 17215.211-2006 for high temperature, low temperature and alternating damp heat.
5.4.4 Solar radiation
For outdoor current acquisition modules, they should be able to be normal after undergoing 10 cycles of tests in accordance with the requirements of GB/T 2423.24-2013 procedure A.
It always works, and the housing does not suffer from deterioration of electrical and mechanical properties.
5.4.5 Altitude
The equipment should be able to work normally at an altitude of 4000m and below (63.0kPa～106.0kPa).
5.4.6 Wind
The outdoor current acquisition module should be able to withstand the wind with an average wind pressure of 350Pa (equivalent to a wind speed not exceeding 27m/s) for 1 minute.
Note. The wind speed of 27m/s is about the middle value of the 9th wind.
5.4.7 Salt spray
The outdoor current acquisition module should meet the 96h salt spray test specified in GB/T 2423.17-2008, and the m...
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