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GB/T 40603-2021Guide on evaluation of curtailment electricity of wind farm (English PDF)

风电场受限电量评估导则

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 11, 2021

Implementation date

May 1, 2022

Scope

GB/T 40603-2021 is the English-translated version of 风电场受限电量评估导则.

GB/T 40603-2021 is a guide to assessing curtailed electricity at wind farms, that is the energy a wind farm could have generated but did not because its output was restricted.

It sets general requirements, the data to prepare and the evaluation method, and defines terms such as nacelle wind speed, actual and theoretical wind turbine power curves and turbine operation status.

Its annexes give the methods for fitting the actual power curve, correcting the theoretical one, extrapolating wind measurement data, correcting nacelle wind speed during restricted periods, and calculating theoretical, available and actual generation, relative deviation and curtailment inside and outside the wind farm.

It is meant for dispatch agencies, grid-connected wind farms after trial operation and assessment service providers. It was issued on 11 October 2021 and has applied since 1 May 2022.

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Document preview — GB/T 40603-2021

National Standard of the People's Republic of China

ICS: 29.020
Classification: F 11

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Data preparation
6 Evaluation method
Appendix A (Normative) Actual Wind Turbine Power Curve Fitting Method
Appendix B (Normative) Theoretical Wind Turbine Power Curve Correction Method
Appendix C (Normative) Extrapolation method of wind measurement data for wind farm
Appendix D (Normative) Cabin Wind Speed Correction Method for Wind Turbines in Restricted State during Restricted Period
Appendix E (Normative) Calculation Method of Theoretical Power Generation of Wind Turbine
Appendix F (Normative) Calculation method of theoretical power generation of wind farm and available power generation of wind farm
Appendix G (Normative) Calculation method of theoretical power generation, available power generation and actual power generation of wind farm
Appendix H (Normative) Calculation Method for Relative Deviation of Electricity
Appendix I (Normative) Calculation method of restricted electricity inside and outside wind farm

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

1 Scope

This document specifies the relevant requirements and methods for the assessment of restricted electricity in wind farms.

This document is applicable to power dispatch agencies, grid-connected wind farms after trial operation, and limited power evaluation service providers, etc., for the development of wind power Field theory power generation, available power generation of wind farms, limited power in the wind farm and limited power outside the wind farm.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 18451.2 Wind Turbine Generator Power Characteristic Test

GB/T 18709 Wind farm wind energy resource measurement method

GB/T 18710 Wind power resource assessment method for wind farms

GB/Z 35483 Wind turbine generating capacity utilization rate

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Stand-alone power

The actual output power of each wind turbine in the wind farm.

3.2 Wind turbine nacelle wind speed

The wind speed monitored on the top of the nacelle of each wind turbine in the wind farm.

Note: According to the temperature and pressure correction as standard reference conditions.

3.3 Actual wind turbine power curve

The function relationship between the net power output of the wind turbine and the wind speed of the nacelle given by the wind turbine manufacturer according to the specific wind conditions on site.

3.4 Theoretical power curve of wind turbine

After testing, correction and standardization according to the determined measurement procedure, the net power output of the wind turbine is a function of the nacelle wind speed.

Note: Expressed in figures and tables.

3.5 Stand-alone operation status

The real-time power generation state of wind turbines is composed of standby state, normal power generation state, off-site restricted state, and on-site restricted state.

Note 1. The standby state is marked with a value of 0, including technical standby state, no wind standby state, and wind cut-out standby state.

Note 2. The normal power generation status is marked with a value of 1, including full performance normal power generation status, performance degradation but normal power generation status, etc.

Note 3. The off-site restricted state is marked with a value of 2, including peak shaving restricted state, section restricted state, etc.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

GB/T 13869-2026|GB/T 24114.2-2026|GB/T 33589-2026|GB/T 33592-2026|GB/T 33593-2026|GB/T 33603-2026

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