GB/T 1094.23-2019 English PDFUS$759.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 1094.23-2019: Power transformers -- Part 23: DC magnetic bias suppression devices Status: Valid
Basic dataStandard ID: GB/T 1094.23-2019 (GB/T1094.23-2019)Description (Translated English): Power transformers -- Part 23: DC magnetic bias suppression devices Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K41 Classification of International Standard: 29.180 Word Count Estimation: 38,317 Date of Issue: 2019-12-10 Date of Implementation: 2020-07-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 1094.23-2019: Power transformers -- Part 23: DC magnetic bias suppression devices---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.(Power transformers.Part 23. DC bias suppression devices) ICS 29.180 K41 National Standards of People's Republic of China Power transformer Part 23. DC bias suppression device Powertransformers-Part 23. DCmagneticbiassuppressiondevices (IEC TS60076-23..2018, MOD) 2019-12-10 release 2020-07-01 implementation State Administration of Market Supervision Published by the National Standardization Management Committee ContentsForeword III Introduction Ⅴ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Conditions of use 2 5 Selection principles 3 6 Technical requirements 4 7 Test 8 8 Marking, packaging, transport and storage 12 9 Nameplate 13 10 Technical Document Requirements 13 Appendix A (informative) Technical differences between this part and IEC TS60076-23..2018 and their causes 14 Appendix B (Informative) Principles of DC Generation in Ground Caused by HVDC Transmission System 16 Appendix C (informative) Examples of harm caused by DC bias 17 Appendix D (Informative) Resistive Current Limiting Device 20 Appendix E (informative) Capacitive DC blocking device 22 Appendix F (Informative) Information Required for Transformer Neutral Point DC Calculations 24 Appendix G (Informative) DC Bias Current Calculation Method 25 Appendix H (Informative) Application Cases 30 Figure 1 Wiring principle diagram of resistance current limiting device 6 Figure 2 Wiring principle diagram of capacitive DC blocking device 8 Figure B.1 Schematic diagram of the maximum return line of the DC transmission project 16 Figure B.2 Schematic diagram of above-ground resistance network and underground electric field 16 Figure C.1 Schematic of DC biasing mechanism 17 Figure C.2 Equipment damage caused by DC bias of transformer due to magnetic storm 19 Figure C.3 Failure of the main transformer Figure 19 Figure D.1 Typical principle wiring diagram of resistance current limiting device 20 Figure D.2 Example of the structure of a resistive current-limiting device Figure 21 Figure D.3 Structure example of inductive dry resistance current limiting device Figure 21 Figure E.1 Typical Principle Wiring Diagram of Capacitive DC Block Device 22 Figure E.2 Example of the structure of a capacitor-type DC blocking device (with electronic protection switch and bypass switch) 23 Figure G.1 Schematic diagram of geodetic modeling for DC bias current calculation 26 Figure G.2 Schematic diagram of a classic soil model 26 Figure G.3 Schematic diagram of the calculation result of ground potential near the ground electrode when the DC system is operated at a single maximum (3000A) 27 Figure G.4 Schematic of bias calculation based on equivalent voltage source 28 Figure G.5 Resistive network engineering calculation for a DC suppression device in a power station Figure 29 Figure H.1 Appearance of the resistor-type current-limiting device at the Tingwei Station power station 30 Table 1 Test items 9 Table 2 Insulation resistance test requirements for capacitive DC blocking devices 10 Table 3 Rated insulation level 10 Table 4 Temperature limits of the current-carrying material after short-circuit current 11 Table A.1 Technical differences between this part and IEC TS60076-23..2018 and their causes 14 Table C.1 Test results of Fufang DC bias magnetism 18 Table C.2 Jiaxing Power Plant Table G.2 Resistivity and thickness of soil layers 26 Table G.3 Evaluation results of the DC current at the neutral point of the transformer when the DC system is operated at a single maximum (3000A) 27 Table H.1 Application test data of resistance current limiting device 30 Table H.2 Application Test Data of Capacitive DC Block Device 31ForewordGB/T 1094 `` Power Transformer '' is divided into the following parts. --- Part 1. General; --- Part 2. Temperature rise of liquid-immersed transformers; --- Part 3. Insulation level, insulation test and external insulation air gap; --- Part 4. Lightning and operating shock test guidelines for power transformers and reactors; --- Part 5. Ability to withstand short circuits; --- Part 6. Reactor; --- Part 7. Load guidelines for oil-immersed power transformers; --- Part 10. sound level determination; --- Part 10.1. Application guidelines for sound level determination; --- Part 11. Dry-type transformers; --- Part 12. Dry-type power transformer load guidelines; --- Part 14. Design and application of liquid-immersed transformers using high-temperature insulation materials; --- Part 16. Transformers for wind power generation; --- Part 18. Frequency response measurement; --- Part 23. DC bias suppression device. This part is Part 23 of GB/T 1094. This section is drafted in accordance with the rules given in GB/T 1.1-2009. This part uses the redrafting method to modify and adopt IEC TS60076-23..2018, Power Transformer Part 23. DC Bias Suppression Installation ". There are technical differences between this part and IEC TS60076-23..2018, and the terms related to these differences have passed the margin The vertical single line (|) in the blank position is marked, and a list of corresponding technical differences and their causes is given in Appendix A. The following editorial changes have also been made in this section. --- The voltage and frequency in the examples are adjusted according to the actual situation in China; --- Move the principle description of the DC bias suppression device in the second paragraph of the scope of IEC TS60076-23..2018 to the introduction; --- Adjust 3.6 in IEC TS60076-23..2018 to 3.1 in this section and 3.1 in IEC TS60076-23..2018 Adjusted to 3.2 of this part, adding 3.2 “Resistor-type” limit to 3.2 in IEC TS60076-23..2018 It is adjusted and adjusted to 3.3 in this part, and 3.3 in IEC TS60076-23..2018 is added with a "Capacitor- type) ", and adjusted to 3.4 of this part, and 3.4 and 3.5 in IEC TS60076-23..2018 to this part Points 3.5.1 and 3.5.2; --- Added Note 2 to 3.3 in this section; --- Combined 4.2 and 4.1 of IEC TS60076-23..2018 with the cost part of 4.1, and adjusted 4.3 to 4.2 of this part; --- Removed the description about the installation position and classification of DC bias suppression device in paragraph 5.1 of IEC TS60076-23..2018 The 5.4 in IEC TS60076-23..2018 was adjusted to 5.4.1 in this section, adding 5.4.2 and 5.4.3; --- Added paragraph 2 (including note) and paragraph 6 in 5.2 of this section; --- Adjust the content of paragraph 3 of 5.3 in IEC TS60076-23..2018 to the second paragraph of 5.3 of this part, and replace IEC TS60076- 23..2018 The second paragraph of 5.3 is adjusted and added to become the third paragraph of this section 5.3; --- Merging Chapters 6 and 7 of IEC TS60076-23..2018 into Chapter 6 of this part, combining IEC TS60076-23. Chapter 6 of.2018 is adjusted to 6.1 of this section, and Chapter 7 of IEC TS60076-23..2018 is adjusted to 6.2 of this section; Removal of resistive material requirements in 6.1.2 of IEC TS60076-23..2018 to 6.1.4 of this section; add in this section Added 6.1.8, 6.1.9, 6.2.6 and 6.2.10; --- Adapted Chapter 8 of IEC TS60076-23..2018 to Chapter 7 of this part, and carried out the order of the chapters of the routine test Adjustments; added 7.4 and 7.5 in this section; --- Adjust Chapters 9, 10 and 11 of IEC TS60076-23..2018 to Chapters 8, 9 and 11 of this part Chapter 10; --- The order of the appendixes has been adjusted, and the appendixes A to G in IEC 60076-23..2018 have been adjusted to the appendixes in this part. Record B ~ Appendix H, and adjusted the content of the appendix in accordance with China's actual application; --- Adjust Table 2 of IEC TS60076-23..2018 to Table 3 of this section, and add Table 2 and Table 4 to this section; --- Deleted Figure C.1 and Figure D.1 of IEC TS60076-23..2018, added Figure C.2, Figure D.1, Figure D.2, Figure D.3, Figure E.1, Figure E.2, Figure G.3 and Figure H.1. This section is proposed by China Electrical Equipment Industry Association. This section is under the jurisdiction of the National Transformer Standardization Technical Committee (SAC/TC44). This section was drafted. State Grid Shanghai Electric Power Company Electric Power Research Institute, Shenyang Transformer Research Institute Co., Ltd., East China Electric Power Force Test Research Institute Co., Ltd., Shanghai University of Electric Power, Guangzhou Gaolan Energy Saving Technology Co., Ltd., China Electric Power Research Institute Co., Ltd. Division, State Grid Electric Power Research Institute, China Southern Power Grid Guangdong Power Grid Co., Ltd. Electric Power Research Institute, State Grid Hubei Electric Power Co., Ltd. Company, Xi'an Jiaotong University, State Grid Shandong Electric Power Company Electric Power Research Institute, Shanghai Jiuneng Electromechanical Manufacturing Co., Ltd., Anhui Zhengguang Power Technology Co., Ltd., TBEA Shenyang Transformer Group Co., Ltd., Shandong Transmission and Transformation Equipment Co., Ltd., TBEA Hengyang Transformer Co., Ltd., Jiangsu Huapeng Transformer Co., Ltd., Zhejiang Jiangshan Transformer Co., Ltd., Lute Electric Co., Ltd., State Grid Jiangxi Electric Power Research Institute of Provincial Electric Power Co., Ltd. The main drafters of this section. Su Lei, Zhang Zhongguo, Wei Bengang, Zhao Wenbin, Zhang Xianzhong, Huang Kefeng, Fu Chenzhao, Li Fuxing, Zhu Yiying, Zhao Hongguang, Wang Xiaomao, Quan Jiangtao, Lu Liang, Zhou Jiabin, Wang Guangwu, Ni Yushun, Liu Yong, Wang Jian, Xu Tao, Su Zhonghuan, Chen Qi, Jiang Zhenjun, Zhang Lingjian, Wang Peng, Liu Yuting.IntroductionIn some cases, abnormal DC currents can occur in the AC grid, which can cause damage to power equipment such as power transformers that are grounded to the neutral point. Profit influence. Case 1. When the HVDC system is operating in single-pole loop or bipolar unbalance mode, the DC current is grounded through the transformer The neutral point flows into the AC grid. Case 2. During the solar magnetic storm, the geomagnetically induced current (GIC) flows into the AC grid. Case 3. Electric traction locomotive and some large-capacity power electronic equipment may cause DC current to flow into the AC grid. DC current flowing through the transformer winding will cause DC bias, which will bring hidden danger to the transformer and power system. DC bias current production Mechanism and harmful effects, see Appendix B and Appendix C. In order to suppress the DC bias current, the DC bias suppression device is usually connected in series to the neutral point circuit of the power transformer and the converter transformer. It is used to suppress the DC bias current generated in single-maximum loop mode or bipolar unbalanced operating conditions of HVDC transmission systems. In metal This device can also mitigate the flow of power transformers and converter transformers that may occur in the transient state of a DC line fault under the operating conditions of the return line. DC current. This section recommends two techniques to suppress the DC bias current, which can respectively limit or isolate the transformers generated by the HVDC transmission system. DC bias current. These two technologies can also be used to suppress the DC of transformers caused by GIC, electric traction locomotives and some large-capacity power electronic equipment. Bias current. However, due to their complexity, these issues are not included in this section. This section defines the technical requirements for two types of DC bias current suppression devices, which are connected to power transformers and converter transformers Neutral point. Power transformer Part 23. DC bias suppression device1 ScopeThis part of GB/T 1094 specifies the terms and definitions, conditions of use, selection principles, and techniques of DC bias suppression devices for power transformers. Technical requirements, tests, signs, packaging, transportation, storage, nameplate and technical file requirements. This section applies to DC bias suppression devices installed at the neutral point of 110kV and above power transformers and converter transformers (including Resistance type current limiting device and capacitor type DC blocking device) and its auxiliary equipment (hereinafter referred to as the device). For other voltage level transformer neutral point DC bias suppression devices, please refer to this section for implementation.2 Normative referencesThe following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1094.1 Power transformers Part 1. General (GB/T 1094.1-2013, IEC 60076-1..2011, MOD) GB/T 1094.2 Power transformers Part 2. Temperature rise of oil-immersed transformers (GB/T 1094.2-2013, IEC 60076-2. (2011, MOD) GB/T 1094.3 Power transformers Part 3. Insulation level, insulation test and external insulation air gap (GB/T 1094.3- 2017, IEC 60076-3..2013, MOD) GB/T 1094.5 Power transformers Part 5. Ability to withstand short circuits (GB/T 1094.5-2008, IEC 60076-5. (2006, MOD) GB/T 1094.6 Power transformers Part 6. Reactors (GB/T 1094.6-2011, IEC 60076-6..2007, MOD) GB/T 3804 3.6kV ~ 40.5kV high voltage AC load switch (GB/T 3804-2017, IEC 62271-103..2011, MOD) GB/T 4109 Insulation bushing with AC voltage higher than 1000V (GB/T 4019-2008, IEC 60137Ed.6.0, MOD) GB/T 4208 enclosure protection grade (IP code) (GB/T 4208-2017, IEC 60529..2013, IDT) GB/T 8287.1 Insulators for indoor and outdoor pillars of systems with a nominal voltage higher than 1000V Part 1. Porcelain or glass insulators Test (GB/T 8287.1-2008, IEC 60168..2001, MOD) GB/T 9091 Inductive Voltage Divider (GB/T 9091-2008, IEC 60618..1997, IDT) GB/T 15291 Semiconductor devices Part 6. Thyristors (GB/T 15291-2015, IEC 60747-6..2000, IDT) GB/T 16927.1 High-voltage test technology Part 1. General definition and test requirements (GB/T 16927.1-2011, (IEC 60060-1..2010, MOD) GB/T 17702 Power Electronic Capacitor (GB/T 17702-2013, IEC 61071..2007, IDT) GB/T 17949.1 Guidelines for measuring soil resistivity, ground impedance and ground potential of grounding systems. Part 1. Routine measurements JB/T 8168 pulse capacitor and DC capacitor JB/T 10777 neutral point grounding resistor3 terms and definitionsThe following terms and definitions apply to this document. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 1094.23-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 1094.23-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 1094.23-2019_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 1094.23-2019_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. |
