GB/T 24843-2018Technical specification of 1000 kV single phase oil-immersed auto-transformer (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB /Z 24843-2009 "1000kV single-phase oil-immersed self-coupling power transformer technical specification". With GB /Z 24843- The main technical changes in 2009 are as follows.

--- Added some terms and definitions, including disintegration transport (3.1.7), on-site assembly (3.1.8);

--- Updated the pollution level requirements (see 4.1.8, 4.1.8 of the 2009 edition);

--- Increased on-load tap-changing range (see Table 1);

--- Increased the no-load loss and deviation requirements of 1500MVA UHV transformers (see 5.4.1);

--- Increased requirements for on-load tap-changers (see 6.4);

--- Increased casing structure requirements (see 6.6.5);

--- Increased the test program for dissolved gases in oil (see 7.2.1);

--- Increase the understanding of body transport and on-site assembly and other related content (see 6.1, 8.1.6);

--- For the high-voltage line end long-term induced voltage test (ACLD) and medium-voltage line end short-time induction withstand voltage test (ACSD) The description was further clarified (see Appendix A);

--- Added schematic diagram of constant flux compensation [see Appendix C, Figure C.1b)].

1 Scope

This standard specifies the performance parameters, structural requirements, tests and signs, packaging and transportation of 1000kV single-phase oil-immersed autotransformer power transformers. Requirements for losing and other aspects.

This standard applies to single-phase oil immersed auto-coupling power transformers of 1000kV class with rated capacity of 1000MVA and 1500MVA. Pressure device.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 1094 (all parts) Power Transformers

GB/T 1094.1 Power transformers - Part 1. General

GB/T 1094.2 Power transformers - Part 2. Temperature rises of liquid immersed transformers

GB/T 1094.3-2003 Part 3. Insulation level, insulation test and external insulation air gap

GB/T 1094.4 Power transformers - Part 4. Lightning impulse test and operational impulse test for power transformers and reactors Guidelines

GB/T 1094.5 Power transformers - Part 5. Ability to withstand shorts

GB/T 1094.7 Power transformers - Part 7. Load guides for oil-immersed power transformers

GB/T 1094.10 Power transformers - Part 10. Sound level determination

GB/T 2424.25 Environmental testing of electrical and electronic products - Part 3. Test guides

GB 2536 Unused mineral insulating oil for electrical fluid transformers and switches

GB/T 2900.15 Electrotechnical terminology transformers, transformers, voltage regulators and reactors

GB/T 5273-2016 High-voltage electrical terminal size standardization

GB/T 10230.1 Tap-changers - Part 1. Performance requirements and test methods

GB 50994 Industrial Enterprise Electrical Equipment Seismic Evaluation Standard

IEC 60296:2012 Unused mineral insulating oil for liquid transformers and switchgear for electricians (Fluids for electrotechnical applications - Unused mineral insulating oils for transformers and switchgear)

3 Terms and definitions, symbols