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GB/T 28570-2025: Technical guide of on-line condition monitoring system for hydraulic turbine and generator units
Status: Valid GB/T 28570: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 28570-2025 | English | 759 |
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Technical guide of on-line condition monitoring system for hydraulic turbine and generator units
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GB/T 28570-2025
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| GB/T 28570-2012 | English | 759 |
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6 days [Need to translate]
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Technical guide of on-line condition monitoring system for hydraulic turbine and generator units
| Valid |
GB/T 28570-2012
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Basic data | Standard ID | GB/T 28570-2025 (GB/T28570-2025) | | Description (Translated English) | Technical guide of on-line condition monitoring system for hydraulic turbine and generator units | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K52 | | Classification of International Standard | 29.160.40 | | Word Count Estimation | 38,335 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 28570-2012 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 28570-2025: Technical guide of on-line condition monitoring system for hydraulic turbine and generator units
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT28570-2025
ICS 29.160.40
CCSK52
National Standard of the People's Republic of China
Replaces GB/T 28570-2012
Hydro-generator status online monitoring system
Technical Guidelines
Released on August 29, 2025
Implementation on March 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 General Principles 3
5 System Functions 4
5.1 Data Collection and Real-time Monitoring 4
5.2 Data Analysis 4
5.3 Data Management 5
5.4 Alarm function 5
5.5 Operation Condition Analysis 6
5.6 Auxiliary Diagnosis 6
5.7 Dynamic Balance Calculation 6
5.8 Status Report 6
5.9 Remote Monitoring 6
5.10 Other functions 6
6 Basic System Structure 6
6.1 System Configuration 6
6.2 Sensor Unit 6
6.3 Data Acquisition Unit 6
6.4 Host computer unit 7
7 Measurement point arrangement 7
7.1 General 7
7.2 Key phase measurement point 7
7.3 Vibration and swing measurement points 7
7.4 Axial displacement measurement point 8
7.5 Pressure pulsation measurement point 8
7.6 Stator core vibration measurement points 8
7.7 Generator air gap measurement point 8
7.8 Generator Magnetic Flux Density Measurement Points 9
7.9 Generator Partial Discharge Measurement Points 9
7.10 Stator Winding End Vibration Measurement Points 9
7.11 Vibration measurement points in stator bar slots 9
7.12 Stator Slip Ring Temperature Measurement Points 9
7.13 Rotor Pole Core Surface Temperature Measurement Points 9
7.14 Noise measurement point 9
7.15 Bolt stress measurement points 9
7.16 Carbon brush slip ring temperature measurement point 9
8 Sensor 10
8.1 Swing and Key Phase Sensors 10
8.2 Vibration Sensor 10
8.3 Stator Core Vibration Sensor 10
8.4 Axial displacement sensor 11
8.5 Pressure Pulsation Sensor 11
8.6 Air Gap Sensor 11
8.7 Magnetic Flux Density Sensor 11
8.8 Partial Discharge Sensors 12
8.9 Stator Winding End Vibration Sensor 12
8.10 Vibration sensor in stator bar slot 12
8.11 Stator Slip Ring Temperature Sensor 12
8.12 Rotor Pole Core Surface Temperature Sensor 13
8.13 Noise Sensor 13
8.14 Bolt stress sensor 13
8.15 Carbon Brush Slip Ring Temperature Sensor 13
8.16 Sensor installation requirements 13
9 Data acquisition equipment 14
9.1 Data Collection Box 14
9.2 Status Monitoring Panel Cabinet 15
9.3 Accessories 15
10 Host computer equipment 15
10.1 General Principles 15
10.2 Data Server 15
10.3 Web Server 16
10.4 Engineer Workstation 16
10.5 Auxiliary equipment 16
11 Testing and Inspection 16
11.1 General requirements 16
11.2 Test and inspection items 16
12 Documents and Information17
12.1 General requirements 17
12.2 Design Documents 17
12.3 Installation Files 17
12.4 Operation Files 17
12.5 Maintenance Files 18
12.6 Test Documents 18
Appendix A (Informative) Typical Structure Diagram of Hydro-generator Set Status Online Monitoring System 19
Appendix B (Informative) Typical measurement point configuration of the online monitoring system for the status of hydro-generator units 20
Appendix C (Informative) Typical Installation Diagram of Hydro-generator Air Gap Sensor 23
Appendix D (Informative) Overview of On-line Measurement of Partial Discharge in Hydrogenerators 25
D.1 Necessity of partial discharge monitoring 25
D.2 Partial discharge pulse signal characteristics 25
D.3 Selection of partial discharge sensors 26
D.4 Installation of partial discharge sensors 26
D.5 Noise Separation Technology 26
D.6 Partial Discharge Data Interpretation 27
Appendix E (Informative) Technical Specifications for Condition Monitoring Parameters of Hydro-generator Sets 28
E.1 Peak-to-peak value calculation method 28
E.2 Phase Angle Definition 28
E.3 Effective value calculation method 29
E.4 Partial discharge value (Qm) and partial discharge quantity (NQN) 29
E.5 Condition Monitoring Parameter Units 30
Reference 31
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 28570-2012 "Technical Guidelines for Online Condition Monitoring Systems for Hydro-generator Sets" and is compatible with GB/T 28570-
Compared with.2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Added stator winding end vibration, stator bar slot vibration, stator slip ring temperature, rotor pole core surface temperature, noise
The online monitoring requirements for condition monitoring parameters such as noise, bolt stress and carbon brush slip ring temperature are supplemented accordingly.
Corresponding data collection and software functional requirements (see 5.2);
b) Added the measurement point configuration and sensor performance requirements for new condition monitoring parameters (see 7.10 to 7.16, 8.9 to 8.15);
c) Modified some technical indicators of some sensors (see Chapter 8, Chapter 8 of the.2012 edition);
d) The performance requirements for the host computer equipment have been changed to adopt the current mainstream configuration (see 10.2, 10.4, and 10.1, 10.3 of the.2012 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee for Standardization of Large Generators (SAC/TC511).
This document was drafted by. Harbin Large Electric Motor Research Institute Co., Ltd., Beijing Huake Tongan Monitoring Technology Co., Ltd., Harbin Electric Motor Factory
Co., Ltd., Dongfang Electric Corporation, Dongfang Electric Corporation, PowerChina Huadong Engineering & Research Institute Co., Ltd., China Electric
China Power Construction Group Chengdu Survey and Design Institute Co., Ltd., China Power Construction Group Northwest Survey and Design Institute Co., Ltd., China Power Construction Group Kunming
China Water Resources and Hydropower Research Institute Co., Ltd., China Three Gorges Construction (Group) Co., Ltd., State Grid New Energy Group Co., Ltd.
Co., Ltd., China Southern Power Grid Energy Storage Co., Ltd., PowerChina Beijing Engineering Group Co., Ltd., Huadian Electric Power Science Research Institute
Northeast Branch of China Power Engineering Group Co., Ltd., China Yangtze Power Co., Ltd.,
Yalong River Basin Hydropower Development Co., Ltd., Yangtze River Survey, Planning, Design and Research Co., Ltd., and China Southern Power Grid Peaking and Frequency Regulation Power Generation Co., Ltd.
Maintenance and Testing Branch, China Railway Water Resources and Hydropower Planning and Design Group Co., Ltd., China Water Resources Zhujiang Planning, Survey and Design Co., Ltd., China Power Construction Group
Guiyang Survey and Design Institute Co., Ltd.
The main drafters of this document are. Sun Yutian, Zhu Yuliang, Wang Gui, Zheng Songyuan, Liang Quanwei, Zheng Xiaokang, Chen Jiaheng, Zheng Yingxia, Chen Zujia,
Duan Hongjiang, Chen Hongyu, Chen Zeyang, Zhou Ye, Li Haijun, Sun Yongxin, Gou Dongming, Wang Jianjun, Luo Yun, Zheng Taoping, Li Xianghua, Song Xufeng, Zhang Liang,
Li Qing, Zhang Jianhua, Wu Guoying, Weng Fagen, Liu Guofeng, Tang Lei, and Li Bingyuan.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2012 as GB/T 28570-2012;
---This is the first revision.
Hydro-generator status online monitoring system
Technical Guidelines
1 Scope
This document specifies the system functions, basic structure, measurement point layout, sensors, data acquisition, and other aspects of the online monitoring system for the status of hydro-generator units.
Technical requirements for equipment and host equipment, as well as testing and inspection, documents and information, etc.
This document applies to the design, manufacture and operation management of the online status monitoring system of hydro-generator units (including pumped storage units).
2 Normative references
This document has no normative references.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
generator units
A measurement system for real-time online monitoring of the operating status of various parts of a hydro-generator set.
3.2
Key phase signal keyphase
The reference azimuth signal of the hydro-generator set status online monitoring system on the main shaft.
3.3
vibration
The reciprocating displacement of designated points of each component of the unit relative to the equilibrium position over time.
3.4
Run-out
The radial vibration of a certain part of the main shaft of a hydro-generator set relative to the adjacent fixed parts.
Note. Also known as shaft relative vibration.
3.5
pressure pulsation
The reciprocating variation of the fluid pressure in the flow channel relative to the average value during a selected period of time.
3.6
air gap
The minimum radial distance between the outer edge of the generator rotor pole and the inner edge of the stator core.
3.7
magnetic flux density
The magnetic flux passing perpendicularly through a unit area.
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