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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. DL/T 2026-2019: General technical specification for monitoring system of HVDC earth electrode Status: Valid
Basic dataStandard ID: DL/T 2026-2019 (DL/T2026-2019)Description (Translated English): General technical specification for monitoring system of HVDC earth electrode Sector / Industry: Electricity & Power Industry Standard (Recommended) Classification of Chinese Standard: K40 Classification of International Standard: 29.240.99 Word Count Estimation: 13,112 Date of Issue: 2019-06-04 Date of Implementation: 2019-10-01 Quoted Standard: GB/T 191; GB/T 2423.1; GB/T 2423.2; GB/T 2423.4; GB/T 2423.10; GB/T 4208; GB/T 6587; GB/T 17626.2; GB/T 17626.3; GB/T 17626.8; GB/T 17626.9; DL/T 860.71; DL/T 860.81; DL/T 860.93; DL/T 860.905; DL/T 860.7410; DL/T 860.901; DL/T 860.801; DL/T 860.74; DL/T Issuing agency(ies): National Energy Administration Summary: This standard specifies the system composition, system functions, technical requirements, detection methods, test methods, installation, commissioning, inspection, packaging and transportation of the HVDC grounding electrode monitoring system. This standard applies to the design, testing, installation and acceptance, operation and maintenance of the HVDC grounding electrode monitoring system. DL/T 2026-2019: General technical specification for monitoring system of HVDC earth electrode---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.General technical specification for monitoring system of HVDC earth electrode ICS 29.240.99 K 40 Record number. 63143-2018 People's Republic of China Electric Power Industry Standard General technical specification for HVDC ground electrode monitoring system 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration Table of contentsForeword...II 1 Scope...1 2 Normative references...1 3 Terms and definitions...1 4 General...2 5 System composition and functions...2 6 Technical requirements...3 7 Testing and test methods...4 8 Inspection rules...6 9 Installation and commissioning...7 10 Acceptance...8 11 Marking, packaging, transportation and storage...8 Appendix A (informative appendix)...10ForewordThis 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". Please note that certain contents of this standard may involve patents, and the issuing organization of this standard does not bear the responsibility for identifying these patents. This standard was proposed by the China Electricity Council. This standard is under the jurisdiction of the High Voltage Direct Current Transmission Technology Standardization Technical Committee of the Power Industry. The main drafting organization of this standard. State Grid Electric Power Research Institute Wuhan Nanrui Co., Ltd. Participated in the drafting of this standard. China Electric Power Research Institute Co., Ltd., State Grid Shaanxi Electric Power Company Electric Power Research Institute, State Grid Sichuan Provincial Electric Power Company Electric Power Research Institute. The main drafters of this standard. Cai Wei, Gu Shanqiang, Tan Jin, Zhao Chun, Fang Yuhe, Tang Liangliang, Xu Xia, Liu Gang, Liao Cheng, Dong Xiaohui, Tan Bo, Wu Min, Chen Kun, Yu Lina, Liu Xi, Zeng Shengqiang, Zheng Luyao, Bi Sheng, Wang Sen, Li Zhizhong, Liu Fan, Yang Lin, Dong Hanbin. Opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of China Electricity Council (No. 2 Baiguang Road, Xuanwu District, Beijing) One, 100761). General technical specification for HVDC ground electrode monitoring system1 ScopeThis standard specifies the system composition, system functions, technical requirements, testing methods, test methods, installation, and Commissioning, inspection, packaging and transportation, etc. This standard applies to the design, testing, installation and acceptance, operation and maintenance of high-voltage DC ground electrode monitoring systems.2 Normative referencesThe following documents are indispensable for the application of this standard. For dated reference documents, only the dated version applies to this standard. For undated reference documents, the latest version (including all amendments) is applicable to this standard. GB/T 191 Packaging, storage and transportation pictorial signs GB/T 2423.1 Environmental testing of electrical and electronic products Part 2.Test method Test A Low temperature GB/T 2423.2 Environmental testing of electrical and electronic products Part 2.Test method Test B. High temperature GB/T 2423.4 Environmental testing of electrical and electronic products Part 2.Test method Test Db. Alternating damp heat (12h + 12h cycle) GB/T 2423.10 Environmental testing of electrical and electronic products Part 2.Test method Test Fc. Vibration (sinusoidal) GB/T 4208 Enclosure protection grade (IP code) GB/T 6587 General Specification for Electronic Measuring Instruments GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test GB/T 17626.3 Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic field radiation immunity test GB/T 17626.8 Electromagnetic compatibility test and measurement technology Power frequency magnetic field immunity test GB/T 17626.9 Electromagnetic compatibility test and measurement technology Pulse magnetic field immunity test DL/T 860 Power Automation Communication Network and System3 Terms and definitionsThe following terms and definitions apply to this standard. 3.1 HVDC earth electrode The grounding device that can continuously deliver direct current to the high-voltage direct current system is composed of several groups of grounding conductors and active filling materials. installed at The ground electrode on land is called the land ground electrode; the ground electrode installed in the sea or coast is called the marine or coastal ground electrode. 3.2 Monitoring system of HVDC earth electrode It can automatically collect data on the operating state of the DC ground electrode, and send the data to the monitoring unit for data processing through the communication unit measuring system. 3.3 Earth electrode site The geographical location of the ground electrode. 3.4 Data acquisition unit Collect the operating parameters of the ground electrode through the measuring and monitoring devices installed on the ground electrode site, and convert the analog signal to digital Signal unit. 3.5 Remote monitoring unit Integrated communication control, database platform and information release functions, used to receive, store, process and display various monitoring data, for grounding The pole monitoring system provides a unit of human-computer interaction interface. 3.6 Communication unit The unit that transmits the data information collected by the data acquisition unit to the monitoring unit and receives instructions from the monitoring unit. 3.7 Power supply unit A device that provides power to the data acquisition unit, communication unit and other equipment in the ground electrode monitoring system. 3.8 Step voltage When the high-voltage DC grounding electrode is operating, the voltage between any two points of the human body touching the ground and a horizontal distance of 1m. Unit V. 3.9 Ampere-hour Integral of grounding electrode current and running time.4 General4.1 The high-voltage DC grounding electrode monitoring system shall meet the technical requirements of the design and operating conditions of the high-voltage DC grounding electrode. 4.2 The high-voltage DC grounding electrode monitoring system shall meet the environmental protection requirements of the current regulations.5 System composition and function5.1 System composition The high-voltage DC grounding electrode monitoring system should consist of a data acquisition unit, a communication unit, a monitoring unit and a power supply unit (see Appendix A). 5.2 System function The HVDC ground electrode monitoring system shall have the following functions. a) Automatically collect the operating state data of the high-voltage DC grounding electrode through the data acquisition unit, which should include the grounding current of the grounding electrode, soil Temperature and humidity and remote video monitoring, real-time measurement of step voltage, monitoring well water level, water temperature, and central area equipment temperature can be increased according to demand; b) The operation status data is transmitted to the converter station monitoring unit through the communication unit; c) Real-time display, statistical analysis and storage of operating status data through the monitoring unit, and remote video monitoring and security Protection d) The power supply unit provides reliable power for the HVDC ground electrode monitoring system.6 Technical requirements6.1 Operating environment conditions a) Ambient temperature. ground equipment -40℃～55℃, underground equipment -10℃～90℃; b) Relative humidity. 5%～100%; c) Atmospheric pressure. 55kPa～106kPa. 6.2 Performance requirements 6.2.1 Data acquisition unit a) Current monitoring device. the resolution is not less than 0.1A, and the error is not more than ±(reading*5% 0.1A); b) Step voltage monitoring device. non-polarized electrode should be used for measurement, the resolution is not less than 0.1V, and the error is not more than ±0.05V; c) Water level and water temperature monitoring device. the water level resolution is not less than 1cm, the error is not more than ± (range*0.2%); the water temperature resolution is not less than 0.1℃, the error is not more than ±0.5℃; d) Central area equipment temperature monitoring device. resolution is not less than 0.1℃, error is not more than 1.0℃; e) Soil temperature monitoring device. the temperature resolution is not less than 0.1℃, and the error is not more than ±0.4℃; f) Soil moisture monitoring device. the humidity resolution is not less than 0.1%, and the error is not more than ±3%; h) Central area safety protection monitoring device. an alarm signal for breaking or short circuit is issued within 3s, with more than 2 defense zones; pulse peak value 5000 V～ 10000V, pulse period 1s～1.5s, pulse duration ≤0.1s, pulse maximum power ≤2.5mC, pulse maximum energy ≤5J; i) Acquisition frequency. the frequency of real-time measurement of step voltage, monitoring well water level, water temperature, soil temperature and humidity, and equipment temperature in the central area is not low At 1 time/minute; the data of video monitoring and infrared image monitoring are continuously uploaded; the current monitoring device is in the grounding pole bipolar balance operation mode The current collection frequency is not less than 1 time/minute, and the current collection frequency in the grounded pole single-max operation mode is not less than 1 time/second; the central area is safe The protection monitoring device keeps the standby state, and transmits the alarm information to the monitoring unit remotely after being triggered. 6.2.2 Communication unit a) The high-voltage DC ground electrode monitoring system should adopt a standard and reliable communication network that meets the requirements for monitoring data transmission; b) A unified communication protocol should be selected between the data acquisition unit and the monitoring unit, generally a communication protocol that conforms to the DL/T 860 standard, And use 1000M and above high-speed Ethernet or optical fiber as the communication channel; c) The monitoring unit should have the function of communicating with the converter station monitoring system. 6.2.3 Power supply unit a) The power supply of the system should adopt the external mains power supply, and the solar photovoltaic power generation power system can be used when the external mains power supply is not available. The power supply must meet the electricity demand of the ground electrode monitoring system equipment. Consider the local sunshine situation throughout the year to carry out the solar photovoltaic power generation system Designed to ensure continuous power supply for at least 7 rainy days; b) The battery pack or UPS power supply shall be equipped to maintain the continuous operation of the data acquisition unit and communication unit in the event of an interruption of the external power supply of the system. Not less than 24 hours; c) The power supply unit should be equipped with a power supply condition monitoring system, and the monitoring signal is transmitted to the background monitoring unit. 6.2.4 Monitoring unit a) The storage capacity of the monitoring server should be expandable. When the acquisition unit generates data with the highest acquisition frequency, the video surveillance data Data and infrared image data can be stored for at least 30 days, and other monitoring data can be stored for at least 1 year; b) The monitoring unit has the ability to process, store and display the monitoring data, and according to the needs of the user, the ground electrode state parameters (feedback Electric cable current, step voltage, monitoring well water level, water temperature, soil temperature, soil humidity, central area equipment temperature, central area safety protection alarm Signal) function to generate daily, weekly, monthly and daily curves, weekly curves, and monthly curves; c) After detecting the grounding electrode operating state and monitoring equipment abnormality, the monitoring unit can immediately carry out alarm processing, and it should have the most basic sound Light alarm effect (screen flashing, audible sound), and other alarm functions can be expanded at the same time, such as transmitting alarm information to the on-duty personnel through the network Or the specified user. 6.3 Electromagnetic compatibility a) Electrostatic discharge immunity, in accordance with the test level specified in GB/T 17626.2, is a contact discharge test of level 4, and the test result evaluation should reach To level a; b) The radio-frequency electromagnetic field radiation immunity is in accordance with the test level 3 specified in GB/T 17626.3. The test result evaluation should reach a level; c) Power frequency magnetic field immunity test, in line with the power frequency magnetic field immunity test of level 5 specified in GB/T 17626.8, the test results are evaluated Must reach a grade; d) Impulse magnetic field immunity, in line with the impulse magnetic field immunity test of level 5 as specified in GB/T 17626.9, the test results are evaluated Must reach a level. 6.4 Appearance and structure a) The structure of each unit device should be complete; the metal surface should be free of rust, cracks, and coating peeling; plastic parts should be free of bubbles, cracks, deformation and Pouring material overflow phenomenon; the text and mark on the surface of the device should be clear; b) The enclosure protection level of each part of the monitoring system shall meet the IP65 level requirements specified in GB/T 4208. 6.5 Mechanical properties 6.5.1 Vibration performance Each unit device should be able to withstand the vibration test specified in GB/T 2423.10.After the test, there should be no damage to each unit device and loose or loose fasteners. It can work normally. 6.5.2 Transport performance After the product is packaged, the transport test is carried out in accordance with the provisions and methods of GB/T 6587, and it can withstand the transport test of class II in Table 1 of the standard (package Including free fall, roll test). After the test, the system should work normally. 6.6 Operational reliability The grounding electrode monitoring system should have functions such as self-checking and fault isolation, and should be able to work continuously, accurately and reliably, and be able to adapt to the Should work environment, the mean time between failures (MTBF) should not be less than 25000h. The average annual data missing rate should not be greater than 1%.7 Testing and test methods7.1 Test environment Except for environmental impact test and field test, other test items should be carried out in the following test environment. a) Ambient temperature. 15°C～35°C; b) Relative humidity. 45%～75%; c) Atmospheric pressure. 80kPa～110kPa; d) Power supply voltage. single-phase 220V (1±5%); e) Power frequency. 50Hz±0.2Hz; f) Power supply waveform. sine wave, waveform distortion is not more than 5%. 7.2 Basic function inspection The high-voltage DC grounding electrode monitoring system shall be formed according to the product manual and the on-site configuration method, and the monitoring system shall be energized and corresponding signals shall be applied Check whether the monitoring system has various functions, and conduct the following tests. a) Input simulation parameters and check whether the output value of the system meets various performance requirements; b) Set several abnormal values to check the alarm function of the monitoring system; c) Set faults and check the self-check function of the monitoring system. 7.3 Electromagnetic compatibility test 7.3.1 Electrostatic discharge immunity test According to the provisions of GB/T 17626.2, and under the following conditions. a) The monitoring system is in normal working condition; b) Contact discharge; c) The enclosure and the parts that may be touched by the staff; d) Test voltage. 8kV; e) Discharge of positive and negative polarity 10 times each, with an interval of at least 1s between each discharge. During and after the test, the system should work normally. 7.3.2 Radio frequency electromagnetic field radiation immunity test According to the provisions of GB/T 17626.3, and under the following conditions. a) The monitoring system is in normal working condition; b) Frequency range. 80MHz～1000MHz; c) Test field strength. 10V/m. During and after the test, the system should work normally. 7.3.3 Pulse magnetic field immunity test According to the provisions of GB/T 17626.9, and under the following conditions. a) The monitoring system is in normal working condition; b) Magnetic field strength. 1000A/m. During and after the test, the system should work normally. 7.3.4 Power frequency magnetic field immunity test According to GB/T 17626.8, and under the following conditions. a) The monitoring system is in normal working condition; b) Magnetic field strength. 100A/m. During and after the test, the system should work normally. 7.4 Climate protection test 7.4.1 High temperature test According to the test requirements and test methods specified in GB/T 2423.2, the ground equipment should be able to withstand a temperature of 55℃, and the underground equipment should be able to withstand A high temperature test with a temperature of 90℃ and a duration of 16h. During and after the test, the system should work normally. 7.4.2 Low temperature test According to the test requirements and test methods specified in GB/T 2423.1, the ground equipment should be able to withstand the temperature -50℃, and the underground equipment should be able to withstand Low temperature test with temperature of -10℃ and duration of 16h. During and after the test, the system should work normally. 7.4.3 Alternating damp heat test Carry out according to the test requirements and test methods specified in GB/T 2423.4, the high temperature is 55℃, the test cycle is 24h, and the in-situ recovery is 2h. During and after the test, the system should work normally. 7.5 Appearance and structure 7.5.1 Appearance The visual appearance should be neat and without obvious scratches. 7.5.2 Structure According to the method specified in GB/T 4208, each unit of the monitoring system shall be tested with a protection level of IP65.After the test, each unit should be able to Work often. 7.6 Mechanical performance test 7.6.1 Vibration test The monitoring system is not packaged or powered, and is fixed in the center of the test bench. The test is carried out in accordance with the provisions of GB/T 2423.10. a) Frequency range. 10Hz～55Hz; b) Peak acceleration. 10m/s2; c) Frequency sweep cycle times. 5 times; d) Duration of dangerous frequency. 10min±0.5min. After the test, check that the monitoring system under test should be free from damage and loose fasteners. The system should be able to work normally after power on. 7.6.2 Transport test a) After packaging, the product should be tested in accordance with the provisions of GB/T 6587, and it can withstand the transport test of class II in Table 1 of the standard (including free Drop and roll test). After the test, the system sho......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of DL/T 2026-2019_English be delivered?Answer: Upon your order, we will start to translate DL/T 2026-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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