GB/T 754-2024 English PDF (GBT754-2024)

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GB/T 754-2024: Parameter series of steam turbines for power plant
GB/T 754-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.040
CCS K 54
Replacing GB/T 754-2007
Parameter series of steam turbines for power plant
ISSUED ON: APRIL 25, 2024
IMPLEMENTED ON: NOVEMBER 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Initial steam parameter series ... 6
4.1 Overview ... 6
4.2 Non-reheat steam turbine ... 6
4.3 Reheat steam turbine ... 7
5 Allowable fluctuation range of steam inlet parameters of steam turbine during
operation ... 9
Annex A (informative) Heating pressure series and adjustable range of cogeneration
steam turbine ... 10
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document replaces GB/T 754-2007 "Parameter series of steam turbines for power
plant". Compared with GB/T 754-2007, in addition to structural adjustments and
editorial changes, the main technical changes in this document are as follows:
a) The maximum initial steam pressure range is changed from 31 MPa to 35 MPa.
The maximum rated power level is changed from 1000 MW to 1 350 MW (see
Chapter 1 of this Edition; Chapter 1 of Edition 2007);
b) The terms "initial steam parameter" and "supercritical parameter" and their
definitions have been added (see 3.1 and 3.7 of this Edition). The definitions of
"initial steam pressure", "initial steam temperature", " initial steam flow rate",
"reheat temperature" and "heating pressure" have been changed (see 3.2~3.6 of
this Edition; 2.1~2.5 of Edition 2007);
c) Various initial steam parameters have been added (see Table 1 ~ Table 3 of this
Edition). The recommended range of initial steam flow rate has been deleted (see
Table 1 ~ Table 3 of Edition 2007);
d) The initial steam parameters and reheat temperature series have been changed (see
Table 2 and Table 3 of this Edition; Table 2 and Table 3 of Edition 2007);
e) The provisions for the allowable fluctuation range of steam inlet parameters of
turbines during operation have been changed (see Chapter 5 of this Edition;
Chapter 4 of Edition 2007).
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This document was proposed by China Electrical Equipment Industry Association.
This document shall be under the jurisdiction of National Technical Committee on
Steam Turbine of Standardization Administration of China (SAC/TC 172).
The drafting organizations of this document: Shanghai Electric Power Plant Equipment
Co., Ltd. Shanghai Steam Turbine Plant, Shanghai Power Generation Equipment
Complete Design Institute Co., Ltd., Beijing Beizhong Steam Turbine and Electric
Machine Co., Ltd., Hangzhou Steam Turbine Power Group Co., Ltd., Dongfang Electric
Group Dongfang Steam Turbine Co., Ltd., Harbin Steam Turbine Plant Co., Ltd.,
Parameter series of steam turbines for power plant
1 Scope
This document gives initial steam parameter series of steam turbines for power plant
and the allowable fluctuation range of steam inlet parameters during operation.
This document is applicable to steam turbines for stationary power generation or
cogeneration with rated power levels of 0.75 MW~1350 MW and initial steam pressures
of 1.28 MPa~35 MPa.
NOTE: Steam turbines for stationary power plant are of the condensing type. Steam turbines for
cogeneration are of the back-pressure type, extraction back-pressure type, and extraction condensing
type.
This document does not apply to nuclear power turbines, steam-gas combined cycle
turbines, solar thermal power generation turbines, waste power generation and biomass
power generation turbines, and waste heat power generation turbines.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 5578, Fixed power plant steam turbine specifications
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 5578 as
well as the followings apply.
3.1 initial steam parameter
Steam parameters at the main steam valve inlet.
3.2 initial steam pressure
Steam pressure at the inlet of the main steam valve of the turbine.
NOTE: All steam pressure values in this document unless otherwise specified are absolute pressures.
3.3 initial steam temperature
The steam temperature at the inlet of the turbine main steam valve.
3.4 initial steam flow rate
The mass flow rate of new steam flowing into the main steam valve inlet of the turbine.
3.5 reheat temperature
The reheat steam temperature at the inlet of the reheat main steam valve (or reheat main
steam and regulating combined valve) of the reheat steam turbine.
3.6 heating pressure
The heating steam pressure at the exhaust port of a back-pressure steam turbine, the
extraction port of an extraction steam turbine, or the outlet of the pressure regulating
valve installed on the heating extraction pipe.
NOTE: The heating pressure series and adjustable range of the cogeneration steam turbine are
shown in Annex A.
3.7 supercritical parameter
Steam parameters are turbine inlet steam parameters with pressure and temperature
higher than the critical point of water.
3.8 ultra-supercritical parameter
Steam turbine inlet parameters of which the steam parameters are higher than
conventional supercritical parameters 24.2 MPa/566℃/566℃. Their initial steam
temperature and/or reheat temperature is greater than or equal to 580°C, and/or initial
steam pressure is greater than or equal to 28 MPa.
4 Initial steam parameter series
4.1 Overview
The initial steam pressure, temperature and initial steam flow rate corresponding to the
typical power level can be selected according to the recommended data listed in Tables
1~3.
NOTE: The initial steam flow rate of steam turbines with rated power of 250 MW and below listed
in Tables 1~3 is calculated based on the configuration of electric feedwater pumps.
4.2 Non-reheat steam turbine
The initial steam parameter series of non-reheat steam turbine is shown in Table 1.