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GB/T 7894-2023: Fundamental technical requirements for hydrogenerators
Status: Valid GB/T 7894: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7894-2023 | English | 879 |
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Fundamental technical requirements for hydrogenerators
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GB/T 7894-2023
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| GB/T 7894-2009 | English | 205 |
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Fundamental technical specifications for hydro generators [including 2015 MODIFICATION 1]
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GB/T 7894-2009
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| GB/T 7894-2001 | English | 639 |
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Fundamental technical specifications for hydro generators
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GB/T 7894-2001
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| GB/T 7894-1987 | English | RFQ |
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Fundamental technical requirements for hydraulic turbine generators
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GB/T 7894-1987
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PDF similar to GB/T 7894-2023
Basic data | Standard ID | GB/T 7894-2023 (GB/T7894-2023) | | Description (Translated English) | Fundamental technical requirements for hydrogenerators | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K21 | | Classification of International Standard | 29.160.20 | | Word Count Estimation | 46,432 | | Date of Issue | 2023-09-07 | | Date of Implementation | 2024-04-01 | | Older Standard (superseded by this standard) | GB/T 7894-2009 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 7894-2023: Fundamental technical requirements for hydrogenerators---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.
ICS 29.160.20
CCSK21
National Standards of People's Republic of China
Replace GB/T 7894-2009
Basic technical requirements for hydroelectric generators
Published on 2023-09-07
2024-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface III
1 Scope 1
2 Normative reference documents 1
3 Terms and Definitions 2
4 On-site operating conditions 2
5 Quotas and Parameters 2
6 temperature 8
7 Operating characteristics and electrical connections10
8 Insulation system 12
9 Mechanical properties and design 17
10 Vibration and swing 19
11 Noise 20
12 Basic structure 21
13 Ventilation and cooling system 24
14 Braking system 25
15 Devices and components for control and protection systems 25
16 Fire extinguishing system 27
17 Logo 27
18 Materials and Parts Storage28
19 Factory and field tests 28
20 Supply 29
Appendix A (informative) Correction of measured ventilation losses of hydrogenerators 30
Appendix B (informative) Correction of measured bearing loss values at different lubricating oil temperatures 32
Appendix C (Informative) Test Project 33
Appendix D (Normative) Trial operation and guarantee period 35
Appendix E (informative) Scope of supply 36
Appendix F (informative) Spare parts 37
Appendix G (Informative) Special Tools 38
Appendix H (Informative) Technical Documents and Drawings 39
Reference 41
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 7894-2009 "Basic Technical Conditions for Hydrogenerators". Compared with GB/T 7894-2009, except for structural adjustments
In addition to general and editorial changes, the main technical changes are as follows.
---Added 60Hz product content to the range (see Chapter 1);
---Added terms and definitions such as condenser, advance phase operation, late phase operation (see Chapter 3);
---Added the preferred rotation speed for 60Hz products (see 5.4);
---Added PQ diagram of turbine generator output (see 5.5);
---Changed the voltage and frequency change range (see 5.6, 5.5 of the.2009 version);
---Added the calculation method for apportioning the thrust bearing loss of the hydrogenerator from the total thrust bearing loss (see 5.7.6);
--- Added requirements for ventilation losses and bearing losses to be corrected according to temperature and humidity (see 5.7.5, 5.7.6, 5.7.7);
---Added detailed values of electrical parameters and time constants as well as tolerance range requirements for reactance (see 5.8, 5.9);
---Changed the total harmonic distortion rate limit of the stator line voltage waveform (see 5.10, 5.8 of the.2009 version);
---The temperature rise limit requirements of the stator core have been changed (see 6.1,.2009 version of 6.1), and the temperature rise limit corresponding to the temperature rise limit has been added.
Temperature rise test method and temperature measurement component layout requirements (see 6.2 and 6.3);
---Changed the stator overcurrent limit (7.1.1,.2009 version 7.1.1);
---Changed the interval division of long-term asymmetric load limits (see 7.1.3,.2009 version of 7.1.3);
---Added specific requirements for sudden short circuit conditions (see 7.1.5);
--- Added requirements for synchronous integration into the power grid (see 7.2);
---Added generator grounding area requirements and grounding identification requirements (see 7.3);
---Changed the insulation performance requirements (see 8.1,.2009 version of 8.1);
---Changed the withstand voltage test limits (see 8.2,.2009 version of 8.2);
--- Added voltage endurance test requirements (see 8.4)
---Added hot and cold cycle test requirements (see 8.5);
---Increases the requirements for structural strength and stiffness of mechanical design, and clearly divides them into three working conditions, namely normal working conditions, special working conditions and extreme working conditions.
Working conditions, three concepts and corresponding strength design requirements are given (see 9.3);
---Added a supplementary explanation that the vibration limit of the machine base is not a performance guarantee value (see 10.1.2, 9.8 of the.2009 version);
---Added core vibration speed limit requirements for 50Hz and 60Hz products (see 10.1.3);
---Added technical requirements for current collecting devices (see 12.3.3);
---Added technical requirements for structural tolerance (see 12.4);
---Added relevant content of evaporative cooling system (see 13.1.3, Appendix E);
---Added redundancy requirements for coolers and additional fans (see 13.2);
---Added the requirement to attach a QR code on the nameplate (see Chapter 17);
---Added the correction method for the measured ventilation loss of the hydrogenerator (see Appendix A);
---Added the correction method for measured bearing loss values under different lubricating oil temperatures (see Appendix B);
---Change the test items into informative content (see Appendix C, Chapter 18 of the.2009 edition);
---Change the content of the auxiliary equipment list in the scope of supply to informative content (see Chapter 20 and Appendix E, Chapter 16 of the.2009 edition
chapter).
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Standardization Technical Committee for Large Generators (SAC/TC511).
This document was drafted by. Harbin Electric Machinery Factory Co., Ltd., Harbin Electric Machinery Research Institute Co., Ltd., Toshiba Hydropower Equipment (Hangzhou)
State) Co., Ltd., China Yangtze Electric Power Co., Ltd., Zhejiang Fuchunjiang Hydropower Equipment Co., Ltd., Huadian Electric Power Research Institute Co., Ltd.
Northeast Branch, Shanghai Voith Hydropower Equipment Co., Ltd., Dongfang Electric Group Dongfang Electric Co., Ltd., China Datang Group Science and Technology
Technical Research Institute Co., Ltd. North China Electric Power Testing Research Institute, China Three Gorges Corporation, China Power Construction Group Beijing Survey and Design Research Institute
Research Institute Co., Ltd., General Electric Hydropower Equipment (China) Co., Ltd., China Southern Power Grid Energy Storage Co., Ltd., China Power Construction Group Chengdu Survey
Measurement Design Institute Co., Ltd., Electric Power Research Institute of State Grid Hubei Electric Power Co., Ltd., China Datang Group Science and Technology Research Institute Co., Ltd.
The Company's Hydropower Research Institute, China Power Construction Group East China Survey and Design Institute Co., Ltd., Hubei Qingjiang Hydropower Development Co., Ltd.,
ANDRITZ (China) Co., Ltd. and Harbin Electric Power Generation Equipment National Engineering Research Center Co., Ltd.
The main drafters of this document. Sun Yutian, Chen Yang, Wu Jinshui, Chen Hui, Cheng Deming, Wang Jianjun, Zhang Zhongcheng, Duolin, Wang Yanwu, Wang Jinsong,
Zou Zubing, Liu Zheng, Yang Mei, Sun Xingjun, He Rufei, Wang Yaohui, Ling Zaixun, Liu Xiquan, Sheng Mingjun, Zhao Zheng, Zhang Jinjing, Liu Bin, Zhu Haiyi.
This document was first published in 1987, revised for the first time in.1999, revised for the second time in.2009, and this is the third revision.
Basic technical requirements for hydroelectric generators
1 Scope
This document specifies the overall technical requirements, product identification, material and component storage, factory and site
Testing and supply requirements, etc.
This document is applicable to three-phase 50Hz/60Hz salient pole synchronous power generation directly connected to the hydraulic turbine and with a rated capacity of 25MVA and above.
machine (hereinafter referred to as turbine generator). Hydro-generators with a rated capacity less than 25MVA shall refer to this standard.
Note. For special provisions on pumped hydro generator motors, see GB/T 20834.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 755 Ratings and performance of rotating electrical machines
GB/T 2900.25 Electrical terminology for rotating electrical machines
GB/T 8564 Technical Specifications for Installation of Hydrogenerator Sets
GB/T 10069.1 Determination methods and limits of noise of rotating electrical machines Part 1.Determination methods of noise of rotating electrical machines
GB/T 20160 Insulation resistance test of rotating electrical machines
GB/T 20835 Generator stator core magnetization test guidelines
GB/T 22715 Impulse voltage resistance level of rotary AC motor stator formed coils
GB/T 25442 Test methods for determining losses and efficiency of rotating electrical machines (except traction motors)
GB/T 28546 Specifications for packaging, transportation and storage of large and medium-sized hydropower units
GB/T 28570 Technical Guidelines for On-line Monitoring System for Hydrogenerator Unit Status
GB/T 32584 Assessment of mechanical vibration of hydroelectric power plants and energy storage pumping station units
GB/T 34665 Motor coil/winding insulation dielectric loss factor measurement method
GB 50084 Design specifications for automatic sprinkler systems
GB 50193 Design specifications for carbon dioxide fire extinguishing systems
DL/T 507 Start-up test procedures for hydroelectric generator sets
JB/T 7608 Test method and limit value for measuring dielectric loss tangent of high-voltage AC motor coil insulation
JB/T 8439 Anti-corona technical requirements for high-voltage AC motors used in high-altitude areas
NB/T 47004 (all parts) Plate heat exchanger
T/CSEE0094 Technical conditions for the complete set of equipment for grounding the neutral point of the generator through the transformer
IEC 60034-33 Rotating electrical machines Part 33.Synchronous turbine generators (including generator motors) Basic technical requirements (Rotating
requirements)
IEC 60287-3-1 Cable current rating calculation Part 3-1.Operating conditions Site operating conditions (Electriccables-
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