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GB/T 1094.14-2022: Power transformer - Part 14: Liquid-immersed power transformer using high-temperature insulation materials
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Power transformer - Part 14: Liquid-immersed power transformer using high-temperature insulation materials
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GB/T 1094.14-2022
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Basic data | Standard ID | GB/T 1094.14-2022 (GB/T1094.14-2022) | | Description (Translated English) | Power transformer - Part 14: Liquid-immersed power transformer using high-temperature insulation materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K41 | | Word Count Estimation | 55,539 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 1094.14-2022: Power transformer - Part 14: Liquid-immersed power transformer using high-temperature insulation materials
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Power transformer - Part 14.Liquid-immersed power transformer using high-temperature insulation materials
ICS 29.180
CCSK41
National Standards of People's Republic of China
Replacing GB /Z 1094.14-2011
Power transformers part 14. use of high temperature
Liquid immersed power transformers for insulating materials
(IEC 60076-14.2013, MOD)
Published on 2022-03-09
2022-10-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
Introduction V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Insulation system 4
5 Temperature rise limit9
6 Components and Materials 11
7 Special Design Considerations 11
8 Required Information 15
9 Nameplate and Supplementary Information 15
10 Trials 16
11 Monitoring, Diagnosis and Maintenance 18
Appendix A (Informative) Insulation Materials 20
Appendix B (Informative) Rapid Temperature Rise and Bubble Formation 26
Appendix C (Informative) Ester Insulating Liquids and Cellulose 29
Appendix D (normative) Code of Insulation System 45
Reference 47
Figure 1 Example 6 of a semi-hybrid insulated winding
Fig. 2 Example of partially mixed insulated winding 7
Figure 3 Example of a fully hybrid insulated winding 8
Figure 4 Example of high temperature insulated winding 9
Figure 5 Temperature gradient of wire to liquid12
Fig. 6 Temperature correction curve of winding of local hybrid insulation system 17
Figure A.1 Heat resistance test legend 22
Figure B.1 Temperature Curve for Bubble Generation 27
Figure C.1 Tensile strength results of thermally modified paper after aging in mineral oil and natural ester liquids30
Figure C.2 Composite results of tensile strength of thermally modified paper after thermal aging in mineral oil and natural ester insulating liquids31
Figure C.3 Degree of polymerization results of thermally modified paper after thermal aging in mineral oil and natural ester insulating liquids32
Figure C.4 Composite results of degree of polymerization of thermally modified paper after thermal aging in mineral oil and natural ester insulating liquids33
Figure C.5 Results of tensile strength of kraft paper after heat aging in mineral oil and natural ester insulating liquids34
Figure C.6 Composite results of tensile strength of kraft paper after thermal aging in mineral oil and natural ester insulating liquids 35
Figure C.7 Degree of polymerization results for kraft paper after thermal aging in mineral oil and natural ester insulating liquids36
Figure C.8 Composite results of degree of polymerization of kraft paper after thermal aging in mineral oil and natural ester insulating liquids37
Figure C.9 Infrared spectrum of kraft paper aged for 175 days in liquid at 110°C Figure 39
Figure C.10 Thermal aging unit life curve of thermally modified paper (least squares fitting) 40
Figure C.11 Heat aging unit life curve of kraft paper (least squares fitting) 41
Table 1 Preferred thermal class 4 for insulation systems
Table 2 Comparison of different insulation systems (windings)5
Table 3 Maximum continuous temperature rise limit of transformer of mixed insulation system10
Table 4 Maximum continuous temperature rise limit of high temperature insulation system transformer 10
Table 5 Recommended values of maximum overload temperature for transformers in mixed insulation systems13
Table 6 Recommended values of maximum overload temperature for high temperature insulation system transformers 14
Table A.1 Typical performance parameters of solid insulating materials 20
Table A.2 Typical coating materials for wire insulation 23
Table A.3 Typical performance parameters of unused insulating liquids 24
Table C.1 The effect of water solubility limit on the reduction of cellulose moisture content 38
Table C.2 Comparison of heat aging results 40
Table C.3 Maximum temperature rise for ester/cellulose paper insulation systems41
Table C.4 Recommended maximum overload temperature limits for ester/cellulose paper insulation systems41
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document is Part 14 of GB/T 1094 "Power Transformers". GB/T 1094 has released the following parts.
--- Part 1.General;
--- Part 2.Temperature rise of liquid-immersed transformers;
--- Part 3.Insulation levels, insulation tests and air gaps for external insulation;
--- Part 4.Lightning impulse and operating impulse test guidelines for power transformers and reactors;
--- Part 5.Ability to withstand short circuits;
--- Part 6.Reactors;
--- Part 7.Loading 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.Loading guidelines for dry-type power transformers;
--- Part 14.Liquid-immersed power transformers using high-temperature insulating materials;
--- Part 15.Gas-filled power transformers;
--- Part 16.Transformers for wind power generation;
--- Part 18.Frequency response measurement;
--- Part 23.DC bias suppression device.
This document replaces GB /Z 1094.14-2011 "Power transformers - Part 14.Liquid immersed transformers using high temperature insulating materials"
Design and Application", compared with GB /Z 1094.14-2011, except for structural adjustment and editorial changes, the main technical changes are as follows.
--- Adjusted normative references (see Chapter 2, Chapter 2 of the.2011 edition);
--- Modified and improved terms and definitions (see Chapter 3, Chapter 3 of the.2011 edition);
--- The number of insulation systems is adjusted to three. conventional, mixed and high temperature (see Chapter 4, Chapter 5 of the.2011 edition);
---Introduce winding definitions to distinguish various types of mixed insulation systems (see Chapters 3, 4 and 5, Chapters 3 and 5 of the.2011 edition
Chapter and Chapter 6);
--- Changed the uniform high temperature insulation system to the high temperature insulation system (see Chapter 4 and Chapter 5, Chapter 5 and Chapter 6 of the.2011 edition
chapter);
--- Modified the example diagram of the insulation system (see Chapter 4, Chapter 5 of the.2011 edition);
--- All recommended temperature limits corresponding to GB/T 1094.7 are given in the corresponding tables (see Chapters 5 and 7,.2011
Chapters 6 and 8 of the.2008 edition).
This document uses the redrafted method to modify the use of IEC 60076-14.2013 "Power transformers - Part 14.The use of high temperature insulating materials
Liquid-Immersed Power Transformers.
The technical differences between this document and IEC 60076-14.2013 and the reasons are as follows.
--- In Chapter 1, the main technical content regulated by this document has been added;
--- Regarding normative reference documents, this document has made adjustments with technical differences to adapt to the technical conditions of our country and the circumstances of the adjustment.
The situation is reflected in Chapter 2 "Normative References", and the specific adjustments are as follows.
● Replacing IEC 60076-1 and GB/T 1094.2 with GB/T 1094.1, which adopts international standards
IEC 60076-2, GB/T 1094.5 replaced IEC 60076-5, GB/T 1094.16 replaced IEC 60076-16,
GB 2536 replaces IEC 60296, GB/T 4109 replaces IEC 60137, GB/T 10230.1 replaces
IEC 60214-1, GB/T 18494.1 replaced IEC 61378-1, GB/T 18494.2 replaced IEC 61378-2,
NB/SH/T 0945 replaces IEC 61099;
● Added reference to NB/T 10199;
--- Adjust the content of terms and definitions in IEC original 3.19 to 8.2.2 of this document, and adjust the content of Note 1 and Note 2 to
text;
---In 6.1, "natural esters should meet the requirements of NB/T 10199" was added to meet the actual situation in my country;
---D.2 "Part D." column item added "MV. medium voltage winding" to conform to the actual situation of our country.
The following editorial changes have also been made to this document.
--- Replace IEC 60076-7 and IEC 60085 with GB/T 1094.7-2008 and GB/T 11021-2014 respectively, and replace them with
Adjusted from normative citations to references;
--- Adjust "Note 1.See IEC 60085" in 3.3 to "[Source. GB/T 11021-2014, 3.11, with modifications]";
--- Deleted Note 2 in 3.6;
--- Correct R2=0.9835 in the description of Figure A.1 to R2=0.9835;
--- Replace the data in Table A.2 with the content in Table 2 in GB /Z 1094.14-2011;
--- Deleted the first sentence of paragraph 2 of A.5 "IEC 61100 provides rules for classifying insulating liquids according to ignition point and calorific value.
but";
--- Adjust the "natural ester" of Table A.3 from row 6 to row 5;
--- Correct the "Figure C.4" mentioned in the second paragraph of the text below Figure C.1 to "Figure C.6";
--- Adjust "Third Winding" in Example 2 and Example 4 of D.4 to "Medium Voltage Winding";
--- Adjusted the references, deleted documents that were not cited in the text, and changed IEC 60050 (alparts) to
IEC 60050-212.2010, adds IEEEC57.100 and GB/T 1094.6.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Transformer Standardization Technical Committee (SAC/TC44).
This document is drafted by. State Grid Henan Electric Power Company Electric Power Research Institute, Shenyang Transformer Research Institute Co., Ltd., China Electric Power Co., Ltd.
Force Science Research Institute Co., Ltd., Guangdong Zhongpeng Electric Co., Ltd., Xinhuadu Special Electric Co., Ltd., TBEA Hengyang Transformer
Co., Ltd., Yunnan Transformer Electric Co., Ltd., Zhenjiang Tianli Transformer Co., Ltd., TBEA Shenyang Transformer Group Co., Ltd.
Company, Chint Electric Co., Ltd., Shandong Power Equipment Co., Ltd., Wujiang Transformer Co., Ltd., Guangdong Kangdewei Electric Co., Ltd.
Company, Chenglai Electric Technology Co., Ltd., Baoding Tianwei Baobian Electric Co., Ltd., Xi'an Xidian Transformer Co., Ltd., Zhejiang Jiangshan
Transformer Co., Ltd., Wolong Electric Yinchuan Transformer Co., Ltd., Chongqing Wangbian Electric (Group) Co., Ltd., DuPont (China)
R&D Management Co., Ltd.
The main drafters of this document. Wang Ji, Liu Jie, Cai Shengwei, Zhang Xianzhong, Si Xuezhen, Han Baojia, Zong Baofeng, Yang Tao, Su Zhonghuan, Yang Hongwei,
Li Yun, Ma Xuping, Deng Haisheng, Zhang Chengfei, Lin Canhua, Wang Wenguang, Zheng Guopei, Zhang Dong, Nie Sanyuan, Jiang Zhenjun, Lu Wei, Fu Gang, Yao Wei, Xu Bangheng,
Fang Ming and Chen Rongqin.
The previous versions of the documents replaced by this document are as follows.
---First published in.2011 as GB /Z 1094.14-2011;
---This is the first revision.
Introduction
The formulation of power transformer standards is to establish a set of best evaluation criteria for power transformers, and to provide power transformers from production materials.
Provide guidance on matters needing attention in selection, product design, product production, product inspection, product selection, and operation and maintenance.
GB/T 1094 aims to establish compliance principles and relevant regulations applicable to the design, manufacture, test methods, operation and maintenance of power transformers.
Then, it is proposed to consist of 14 parts.
--- Part 1.General. The purpose is to establish the rules applicable to the design, manufacture and production test of various types of power transformers.
General principles and related rules.
--- Part 2.Temperature rise of liquid immersed transformers. The purpose is to establish the relevant temperature rise aspects applicable to various types of liquid immersed power transformers.
technical requirements and test methods.
--- Part 3.Insulation level, insulation test and external insulation air gap. The purpose is to establish suitable for various types of liquid immersed power transformers
Technical requirements and insulation test methods for insulation levels, insulation tests and external insulation air gaps.
--- Part 4.Lightning impulse and operating impulse test guidelines for power transformers and reactors. The purpose is to establish
Technical requirements and test methods for lightning impulse testing and operational impulse testing of power transformers and reactors.
--- Part 5.Ability to withstand short circuits. The purpose is to establish the relevant specifications applicable to various types of power transformers regarding their ability to withstand short circuits.
Technical requirements and test methods for ability to withstand short circuits.
--- Part 6.Reactors. The purpose is to establish technical requirements and test requirements applicable to various types of reactors.
--- Part 7.Loading guidelines for oil-immersed power transformers. The purpose is to carry out the operation of various types of oil-immersed power transformers with load.
provide guidance.
--- Part 10.Sound level determination. The purpose is to establish technical requirements applicable to various types of power transformers and reactors related to sound levels.
Test methods for the determination of summed sound levels.
--- Part 10.1.Application guidelines for sound level determination. The purpose is to measure the sound level of various power transformers and reactors.
Provide guidance.
--- Part 11.Dry-type transformers. The purpose is to establish technical requirements and test requirements applicable to various types of dry-type power transformers.
--- Part 12.Dry-type power transformer load guidelines. The purpose is to improve various types of dry-type power transformers related to load operation.
for guidance.
--- Part 14.Liquid-immersed power transformers using high-temperature insulating materials. The purpose is to establish suitable for various types of high temperature insulation
Technical requirements and test requirements for materials of liquid immersed transformers.
--- Part 15.Gas-filled power transformers. The purpose is to establish technical requirements and tests applicable to various types of gas-filled power transformers.
inspection requirements.
--- Part 16.Transformers for wind power generation. The purpose is to establish the technical requirements and tests applicable to various types of wind power transformers.
inspection requirements.
--- Part 18.Frequency response measurements. The purpose is to establish technical requirements applicable to various types of power transformers related to frequency response.
Test method for summed frequency response measurement.
--- Part 23.DC bias suppression device. The purpose is to establish the technical requirements and tests applicable to various types of DC bias suppression devices.
inspection requirements.
GB/T 1094 clarifies the technical requirements and test requirements of various types of power transformers and reactors through 14 parts.
Specific test procedures, test methods and operating instructions are provided. By establishing clear scope, terminology, technical requirements and test methods for various products
etc., so that producers, users and relevant test personnel can operate more clearly and accurately, so as to design and manufacture high-quality products,
Good promotion of trade, exchanges and technical cooperation, and provide guarantees for the normal operation of my country's power grid.
This document standardizes liquid immersed transformers using high temperature insulating materials. As a system, solid insulation includes a wide
A wide range of materials with different thermal properties. Insulating and cooling fluids also vary, from mineral oil to some other fluids with certain thermal performance differences.
This document is not isolated, but is based on the information and guidelines provided in other parts of the GB/T 1094 series. because
Therefore, this document follows two guiding principles. The first principle is that liquid immersion transformers are well known and
Sections are well defined. Therefore, unless there is a citation value, or duplication is appropriate for the purpose of emphasis or comparison, no repetition is made in this document.
Repeat the details of these transformers.
The second principle is that the materials used in conventional liquid immersed transformers working within the temperature range specified in GB/T 1094.2 (generally
Often kraft paper, cardboard, wood, mineral oil, paint and varnish) are well known and considered traditional. all other insulating materials,
Whether solid or liquid, its thermal properties are higher than materials used in traditional insulation systems and are considered high temperature. Therefore, in order to
For ease of comparison, conventional insulation systems are defined in this document as "conventional" insulation systems, and the thermal limits of these conventional insulation systems are used as reference
test to illustrate the differences between other high temperature systems.
This document also specifies loads, overloads, tests and components. Filtered information for "conventional" transformers, use only
for comparison or emphasis purposes. For additional information refer directly to the relevant documents.
Power transformers part 14. use of high temperature
Liquid immersed power transformers for insulating materials
1 Scope
This document specifies terms and definitions, insulation systems, temperature rise limits, components and
Materials, special design considerations, required information, nameplates and supplementary information, testing, monitoring, diagnostics and maintenance.
This document applies to the following operating temperatures higher than the conventional limits and the use of high-temperature insulating materials or high-temperature insulating materials similar to conventional insulating materials
Combined liquid immersed transformer products.
--- Power transformers complying with GB/T 1094.1;
---Converter transformers conforming to GB/T 18494 series standards;
---Transformers for wind power generation conforming to GB/T 1094.16;
--- Electric arc furnace transformer;
--- Reactors complying with GB/T 1094.6.
Other types of transformers and reactors using high temperature insulating materials can refer to this document.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (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 Liquid Immersion Transformers (GB/T 1094.2-2013, IEC 60076-2.
2011, 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 1094.16 Power Transformers Part 16.Transformers for Wind Power Generation (GB/T 1094.16-2013, IEC 60076-
16.2011, MOD)
GB 2536 Unused mineral insulating oil for electrical fluid transformers and switches (GB 2536-2011, IEC 60296.
2003, MOD)
GB/T 4109 Insulating sleeves with AC voltage higher than 1000V (GB/T 4109-2008, IEC 60137Ed6.0, MOD)
GB/T 10230.1 Tap-changer Part 1.Performance requirements and test methods (GB/T 10230.1-2019, IEC 60241-1.
2014, MOD)
GB/T 18494.1 Converter Transformers Part 1.Industrial Converter Transformers (GB/T 18494.1-2014, IEC 61378-1.
2011, MOD)
GB/T 18494.2 Converter Transformers Part 2.Converter Transformers for HVDC Transmission (GB/T 18494.2-2022,
IEC /IEEE60076-57-129.2017, MOD)
GB/T 21218 Unused silicon insulating liquid for electrical use (GB/T 21218-2007, IEC 60836.2005, IDT)
NB/SH/T 0945 Synthetic organic ester type electrical insulating fluid (NB/SH/T 0945-2017, IEC 61099.2010, MOD)
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