GB/T 28545-2023Directives for rehabilitation and performance improvement for hydraulic turbines, storage pumps and pump-turbines (English PDF)

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 28545-2012 "Guidelines for the Renovation and Performance Improvement of Water Turbines, Storage Pumps and Water Pump Turbines" and is consistent with Compared with GB/T 28545-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) The scope of application has been changed, and the Pelton turbine has been changed to Pelton turbine (see Chapter 1, Chapter 1 of the:2012 edition);

b) The term "modern technological transformation" is deleted (see 3.4 of the:2012 edition);

c) Added the term "replacement" and its definition (see 3.4);

d) Added abbreviations (see Chapter 4);

e) The reasons for the transformation have been changed, and the 7 main reasons for the transformation have been described in detail (see 5.2~5:8, Chapter 4 of the:2012 edition chapter);

f) The determination of the plan has been changed, and the options are compared and confirmed from the aspects of transformation scope, cost, schedule, benefit, risk management and economic analysis:

The regulations have been refined (see 6.2:2~6:2:7, 5:2:3:1~5:2:3:6 of the:2012 version);

g) Added a typical routine checklist (see Table 2);

h) Added content for evaluation of temperature, noise, stainless steel galvanic corrosion and scratching (see 7.3:2:2:5~7:3:2:2:7);

i) Increases the impact of the roughness of the flow channel itself and its adjacent components on efficiency (see 7.3:3:3:2);

j) Added the evaluation of the impact of the sealing gap of the anti-leak ring on the hydraulic performance (see Table 3);

k) Increased expected efficiency after replacing the runner of the Francis turbine (including improving the airfoil, restoring the surface condition and reducing the loss of the anti-leak ring) the improvement value (see Table 4);

l) Increased the potential efficiency improvement of the turbine after modifying/replacing other components of the Francis turbine flow path (see Table 5);

m) The modification plan of extending the blades of the lower ring of the runner into the upper part of the draft tube tapered tube has been deleted (see 6.3:4:5:3 of the:2012 edition);

n) Delete the plan for ultra-long guide vane design (see 6.3:4:5:3 of the:2012 edition);

o) Added assessment of the impact on the power grid (see 7.4:9);

p) The content of the feasibility study of the renovation project has been changed (see B:4, A:1:4 of the:2012 version):

This document is modified to adopt IEC 62256:2017 "Updation and Performance Improvement of Water Turbines, Storage Pumps and Water Pump Turbines":

Compared with IEC 62256:2017, this document has made the following structural adjustments:

---Chapter 4 corresponds to the abbreviation part of Chapter 3 in IEC 62256:2017;

---Chapter 5 corresponds to Chapter 4 in IEC 62256:2017;

---Chapter 6 corresponds to 5:3:4:2~Chapter 6 in IEC 62256:2017;

---7:3:3 corresponds to 7:3:4 in IEC 62256:2017;

---Appendix A corresponds to Chapter 9 of IEC 62256:2017;

---Appendix B corresponds to 5:1, 5:2:1, 5:2:2, 5:3:2, 5:3:3, 5:3:4:1 in IEC 62256:2017;

---Appendix C corresponds to Appendix B in IEC 62256:2017;

---Appendix D corresponds to 7:3:3 in IEC 62256:2017;

---Appendix E corresponds to Appendix A in IEC 62256:2017;

---Appendix F corresponds to Appendix C in IEC 62256:2017:

The technical differences between this document and IEC 62256:2017 and their reasons are as follows:

---Changed the scope of application and deleted diagonal flow units (see Chapter 1);

--- Added normative references to GB/T 2900.45 (see Chapter 3);

---Deleted the terms "upgrade", "expanded overhaul", "modern technological transformation", "reconstruction" and "renovation" (see paragraph 3 in IEC 62256:2017 chapter);

---Deleted the abbreviations "ACG" "ETA" "FMA" "FMECA" "FTA" "HAZOP" "IRR" "PCB" "VAR" (see Chapter 3 in IEC 62256:2017);

---Changed the reason for the transformation (see Chapter 5);

---Deleted the transformation project logic flow diagram (see Figure 1 in IEC 62256:2017);

--- Added normative references to GB/T 15613 (see 6.4:2);

---Added optimization of operation mode (see 6.6:2:3:3);

---Added the influence of draft tube bulging on turbine status (see 7.3:2:4:1);

---Deleted the figures on the potential efficiency improvement after Francis turbine modification and the efficiency improvement after propeller turbine modification (see

Figure 11 and Figure 12 in IEC 62256:2017);

---Changed the impact of runner improvement on turbine efficiency (see 7.3:3:3:2);

---Changed the impact of improvements in other components of the turbine on turbine efficiency (see 7.3:3:3:3);

---Deleted the modification of the Hoover Dam hydropower station unit in the United States and the No: 3 hydroelectric generator unit of the Outardes Power Station in Canada:

Examples and curves of retrofit projects (7:3:4:2 in IEC 62256:2017);

---Deleted the potential efficiency improvement value after only improving the hydraulic design of the Francis turbine runner and the third stage of La Grande, Quebec, Canada the power station (LaGrande-3) turbine runner (put into operation in 1982) achieved efficiency improvements by slightly cutting the water outlet edge of the blades:

High conditions and curves (7:3:4:3:2 in IEC 62256:2017):

The following editorial changes have been made to this document:

---Change the name of the standard to "Guidelines for the Renovation and Performance Improvement of Water Turbines, Storage Pumps and Water Pump Turbines";

---Replaced IEC 60193 with the informative reference GB/T 15613 (see 6.5:2, 7:3:2:2:8:2, 8:3:4:2, 8:3:4:3);

---Replaced IEC 60041 with the informative reference GB/T 20043, and used the informative reference GB/T 15469.1, GB/T 19184 replaces IEC 60193 (see 6.5:2, 8:4:1);

---Replaced IEC 60944 with the informative reference GB/T 17189 (see 7.3:2:2:3, 7:4:1);

---Replaced ISO 7919-5:2005 with the informative reference GB/T 32584, adding installation, operation and maintenance issues (see 7.3:2:2:8:1);

---References changed:

Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:

1 Scope

This document applies to the following types of turbines, storage pumps and pump turbines:

---Mixed flow type;

---Axial flow type;

---Through-flow type;

---Water bucket type:

This document gives information on other aspects of the power plant building that may affect or be affected by the modification of turbines, storage pumps and water pump turbines:

equipment, but not discussed in detail:

The purpose of this document is to assist in the identification, evaluation and implementation of retrofit and performance improvement projects for turbines, storage pumps and pump turbines:

This operation is applicable to owners, consulting units and suppliers to determine the following matters:

---Demand and economic analysis of renovation and performance improvement;

---The scope of work for renewal and transformation;

---skills requirement;

---effect evaluation:

The purpose of this document is as follows:

--- Provide assistance in the decision-making process;

---Provide information resources for transformation;

---Identify major issues during the transformation process;

---Identify key points in the transformation process:

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 2900.45 Electrical Terminology Hydropower Machinery Equipment for Hydropower Stations (GB/T 2900.45-2006, IEC/T R61364:1999, MOD) GB/T 15613 Hydraulic turbine, storage pump and water pump turbine model acceptance test (GB/T 15613-2023, IEC 60193:

2019,IDT)

3 Terms and definitions

The terms and definitions defined in GB/T 2900.45 and the following apply to this document:

Rehabilitation

Restoring the efficiency and/or capacity of the equipment to levels close to that of a new unit or extending the life of the equipment by re-establishing the performance of the entire unit life: