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GB/T 20320-2023 English PDF

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GB/T 20320-2023: Wind energy generation systems - Electrical characteristics measurement and assessment of wind turbines
Status: Valid

GB/T 20320: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20320-2023	2389	Add to Cart	11 days	Wind energy generation systems - Electrical characteristics measurement and assessment of wind turbines	Valid
GB/T 20320-2013	RFQ	ASK	3 days	Measurement and assessment of power quality characteristics of wind turbines generator systems	Obsolete
GB/T 20320-2006	RFQ	ASK	4 days	The WTG power quality measurement and assessment methods	Obsolete

Similar standards

GB/T 19072 GB/T 19071.1 GB/T 19070 GB/T 20321 GB/T 20319

Basic data

Standard ID: GB/T 20320-2023 (GB/T20320-2023)
Description (Translated English): Wind energy generation systems - Electrical characteristics measurement and assessment of wind turbines
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F11
Classification of International Standard: 27.180
Word Count Estimation: 122,192
Date of Issue: 2023-05-23
Date of Implementation: 2023-12-01
Older Standard (superseded by this standard): GB/T 20320-2013
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 20320-2023: Wind energy generation systems - Electrical characteristics measurement and assessment of wind turbines

---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 27:180 CCSF11 National Standards of People's Republic of China Replacing GB/T 20320-2013 Electrical Characteristics of Wind Turbines in Wind Power Generation System Measurement and Evaluation Methods Windturbines, IDT) Released on 2023-05-23 Implemented on 2023-12-01 State Administration for Market Regulation Released by the National Standardization Management Committee

Preface IX Introduction Ⅺ 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Symbols and units 10 5 Abbreviations 11 6 Wind Turbine Specifications 12 7 Test conditions and test system 12 7:1 General 12 7:2 Overview of test levels 12 7:3 Test validity 13 7:4 Test conditions 14 7:5 Test equipment 14 8 Electrical characteristic measurement and test procedure 15 8:1 General 15 8:2 Power quality test 16 8:3 Steady state operation 21 8:4 Control characteristics 27 8:5 Dynamic performance 36 8:6 Off-grid test 42 Appendix A (Informative) Report Format Sample 47 A:1 Overview 47 A:2 Basic information of test items 47 A:3 Power Quality Test 48 A:4 Steady-state operation 58 A:5 Dynamic performance (see 8:5) 73 A:6 Off-grid protection (see 8:6) 78 Appendix B (Informative) Voltage Fluctuation and Flicker 82 B:1 Continuous operation 82 B:2 Switch operation 82 B:3 Confirmatory tests for flicker measurement procedures 83 B:4 Detailed definition 86 Appendix C (Normative) Active Power, Reactive Power and Voltage Measurements 88 C:1 General 88 C:2 Reference direction according to Generator Practice 88 C:3 Calculation of positive, negative and zero sequence components 89 Appendix D (Informative) Harmonic Evaluation 94 D:1 General principles 94 D:2 General analytical methods 94 D:3 Determination of harmonic amplitudes affected by space harmonics in DFAG systems 101 Appendix E (informative) Wind turbines and wind farm power quality assessment 102 E:1 General 102 E:2 Voltage fluctuations 102 E:3 Current harmonics, interharmonics and high-frequency components 104 Appendix F (Informative) Guidelines for Citing Test Results of Different Wind Turbine Generating Sets on the Same Product Platform 105 References 108 Figure 1 Step response example 8 Figure 2 Main parts of the measurement system 15 Fig:3 Schematic diagram of virtual grid used for virtual voltage simulation16 Figure 4 Corresponding curve of active power and wind speed (example) 22 Figure 5 Number of measured data in each wind speed interval (example) 23 Figure 6 Number of measured data in each power interval (example) 23 Fig:7 Example of PQ curves of wind turbines at different voltage levels26 Figure 8 Schematic diagram of active power reference value adjustment 28 Figure 9 Example of active power step response 28 Figure 10 Example of available active power and measured active power curves in ramp rate limiting mode30 Figure 11 Examples of active power control functions according to different measurement points and reference frequency step values31 Figure 12 Integrated inertia - definition 34 Figure 13 Static error test 35 Figure 14 Dynamic response test (example) 35 Figure 15 Example of low voltage ride through test equipment 37 Fig:16 Positive sequence voltage error band of low voltage disturbance when wind turbine is unloaded38 Figure 17 Error band of high voltage disturbance positive sequence voltage 38 Figure 18 Example of resistance-capacitance high voltage ride-through test unit 39 Figure 19 Example of low voltage ride through test diagram 40 Figure 20 Example of high voltage ride through test diagram 41 Figure 21 Example of overvoltage or overfrequency step ramp test 44 Figure 22 Example of overvoltage or overfrequency pulse ramp test 44 Figure 23 Example of release time test 45 Figure A:1 Voltage short-term flicker value changes with active power Figure 49 Figure A:2 Flicker coefficient changes with active power when the grid impedance phase angle is 30° Figure 49 Figure A:3 Flicker coefficient changes with active power when the grid impedance phase angle is 50° Figure 49 Figure A:4 Flicker coefficient changes with active power when the grid impedance phase angle is 70° Figure 49 Figure A:5 Flicker coefficient changes with active power when the grid impedance phase angle is 85° Figure 49 Figure A:9 Time series of starting three-phase voltage effective value at rated active power Figure 51 Figure A:10 Time series of starting three-phase current effective value at rated active power Figure 51 Figure A:11 Start active power and reactive power time series at rated active power Figure 51 Figure A:12 Time series of three-phase voltage effective value when generator 1 is switched to 2 Figure 52 Figure A:13 Time series of three-phase current RMS value when generator 1 is switched to 2 Figure 52 Figure A:14 Time series of active power and reactive power when generator 1 is switched to 2 Figure 52 Figure A:15 Three-phase voltage time series when generator 2 is switched to 1 Figure 52 Figure A:16 Three-phase current time series when generator 2 is switched to 1 Figure 53 Figure A:17 Time series of active power and reactive power when generator 2 is switched to 1 Figure 53 Figure A:18 The maximum value of the 95% quantile of each harmonic current 58 Figure A:19 The maximum value of the 95% quantile of harmonic currents between frequencies 58 Figure A:20 The maximum value of the 95% quantile of the current high-frequency component at each frequency 58 Figure A:21 Power curve 59 Figure A:22 Reactive power and active power 60 Figure A:23 PQ curve 60 Figure A:24 PQ curve at maximum voltage 61 Figure A:25 PQ curve at minimum voltage 62 Figure A:26 1min average current unbalance degree changes with active power Figure 62 Figure A:27 Active power reference value, available power and measured power time during static error evaluation test in active power control mode sequence 63 Figure A:28 In the active power control mode, the wind speed time series during the static error evaluation test 63 Figure A:29 Active power reference value, available power and measured power time during the settling time test in active power control mode sequence 63 Figure A:30 Active power ramp rate limiting test period, available active power and measured active power time series 64 Figure A:31 During the active ramp rate limit test, the wind speed time series 64 Figure A:32 Time series of available active power and measured active power during the ramp rate limit test 65 Figure A:33 During the ramp rate limit test, the wind speed time series 65 Figure A:34 Time series of available active power and measured active power during the ramp rate limit test 66 Figure A:35 During the ramp rate limit test, the wind speed time series 66 Figure A:36 Time series of available active power and measured active power during ramp rate limiting test 66 Figure A:37 During the ramp rate limit test, the wind speed time series 67 Figure A:38 During grid frequency change, available active power, measured active power and reference active power time series 67 Figure A:39 Wind speed time series 68 Figure A:40 Measured value of active power changing with frequency 68 Figure A:41 During the grid frequency change, available active power, measured active power and reference active power time series 68 Figure A:42 Wind speed time series 68 Figure A:43 Measured value of active power changing with frequency 69 Figure A:44 Test 1: When 0:25Pn< P< 0:5Pn, available active power, measured active power, grid frequency reference value time sequence 69 Figure A:45 Test 1: When 0:25Pn< P< 0:5Pn, wind speed time series 70 Figure A:46 Test 2: When 0:25Pn< P< 0:5Pn, available active power, measured active power, grid frequency reference value time sequence 70 Figure A:47 Test 2: When 0:25Pn< P< 0:5Pn, wind speed time series 70 Figure A:48 Test 3: When P > 0:8Pn, time series of available active power, measured active power and grid frequency reference value 70 Figure A:49 Test 3: When P >0:8Pn, wind speed time series 70 Figure A:50 Test 4: When P > 0:8Pn, time series of available active power, measured active power and grid frequency reference value 70 Figure A:51 Test 4: When P >0:8Pn, wind speed time series 71 Figure A:52 Test 5: when v > vn, time series of available active power, measured active power, grid frequency reference value 71 Figure A:53 Test 5: When v > vn, wind speed time series 71 Figure A:54 Test 6: When v > vn, time series of available active power, measured active power and grid frequency reference value 71 Figure A:55 Test 6: when v > vn, wind speed time series 71 Figure A:56 During the reactive power control test, the time series of reactive power reference values and measured values is shown in Figure 72 Figure A:57 During reactive power control test, active power time series Figure 72 Figure A:58 During the reactive power dynamic response test, the time series of reactive power reference values and measured values Figure 73 Figure A:59 During reactive power dynamic response test, active power time series Figure 73 Figure A:60 Three-phase voltage waveform during voltage drop/rise when the wind turbine under test is not connected to the grid 74 Figure A:61 Three-phase voltage waveform during the recovery period after the voltage drop/rise when the wind turbine under test is not connected to the grid 74 Figure A:62 When the wind turbine under test is not connected to the grid, the effective value of the three-phase voltage during the test (one cycle) 74 Figure A:63 When the wind turbine under test is not connected to the grid, the positive sequence component of the voltage during the test is 75 Figure A:64 Three-phase voltage waveform during voltage drop/rise period when the wind turbine unit under test is connected to the grid 76 Figure A:65 Three-phase voltage waveform during the recovery period after the voltage drop/rise when the measured wind turbine is connected to the grid 76 Figure A:66 When the tested wind turbine is connected to the grid, the effective value of the three-phase voltage during the test (one cycle) 76 Figure A:67 When the wind turbine under test is connected to the grid, the fundamental positive-sequence and negative-sequence voltages during the test period 77 Figure A:68 When the tested wind turbine is connected to the grid, the effective value of the three-phase current during the test (one cycle) 77 Figure A:69 When the wind turbine under test is connected to the grid, the fundamental positive sequence and negative sequence currents during the test period 77 Figure A:70 When the wind turbine under test is connected to the grid, the fundamental positive sequence active power during the test period is 77 Figure A:71 When the wind turbine under test is connected to the grid, the fundamental positive sequence reactive power during the test period is 77 Figure A:72 When the wind turbine under test is connected to the grid, the fundamental positive-sequence active current during the test period is 77 Figure A:73 When the wind turbine under test is connected to the grid, the fundamental positive sequence reactive current during the test period is 78 Figure A:74 When the wind turbine under test is connected to the grid, the wind speed or available power during the test78 Figure A:75 Voltage time series during 10s fault reconnection test 80 Figure A:76 Time series of active power during 10s fault reconnection test (including recovery phase) 80 Figure A:77 Wind speed time series during 10s fault reconnection test 80 Figure A:78 Voltage time series during 60s fault reconnection test 80 Figure A:79 Active power time series during 60s fault re-connection test (including recovery phase) 80 Figure A:80 Wind speed time series during 60s fault reconnection test period 80 Figure A:81 Voltage time series during 600s fault reconnection test 81 Figure A:82 600s fault reconnection test period (including recovery phase) active power time series 81 Figure A:83 Wind speed time series during 600s fault reconnection test period 81 Figure B:1 Measurement procedure for wind turbine flicker during continuous operation 82 Figure B:2 Measurement procedure for wind turbine voltage variation and flicker during switching operation 83 Figure C:1 When the generator convention is adopted, the positive direction of the instantaneous phase current of active power, reactive power and instantaneous phase voltage 88 Figure C:2 Example of power phasors in each quadrant corresponding to instantaneous phase voltage and current when the generator convention is adopted 89 Figure D:1 Definition of spectral line phase angle under the generator convention (taking the fifth harmonic αI5= 120° and αU5= 170° as an example, so the fifth The harmonic phase angle is φ5= 170°-120°= 50°) 95 Figure D:2 Aggregated harmonic amplitude (dotted line) in the 10s interval and the amplitude calculated directly from the DFT10 period window without aggregation (dotted line) compare 96 Figure D:3 Comparison of dominant phase angle ratio (PAR) 97 Figure F:1 Block diagram of a general-purpose wind turbine (source IEC 61400-27-1) 106 Table 1 Test Level 12 Table 2 Requirements for measuring equipment15 Table 3 Statistics of the number of 10-min measurement data in each wind speed interval 22 Table 4 Statistics of the number of measured data in each power range (10min average value) 23 Table 5 Maximum measured active power value 24 Table 6 Test results of active power control accuracy 29 Table 7 Test results of active power reference value 29 Table 8 Calculation of active power ramp rate31 Table 9 Frequency-dependent active power adjustment function setting example 33 Table 10 Static error test 36 Table 11 Dynamic response test 36 Table 12 Voltage drop example 40 Table 13 Example of voltage increase 41 Table 14 Grid Protection Test 43 Table A:1 Report Basic Information 47 Table A:2 main data 47 Table A:3 Rated parameters 48 Table A:4 Test conditions 48 Table A:5 Flicker coefficient of each power range (95% percentile) 48 Table A:6 Start 50 when cutting into the wind speed Table A:7 Starting at rated active power 51 Table A:8 Start-up under the worst working condition when the generator is switched 52 Table A:9 Basic test information 53 Table A:10 10min harmonic components (95% percentile) in each power range 53 Table A:11 Harmonic components (95% percentile) between 10 min in each power range 55 Table A:12 10min high-frequency components (95% percentile) in each power range 56 Table A:13 Variation of active power with wind speed 58 Table A:14 Test data power interval distribution 58 Table A:15 Maximum active power 59 Table A:16 Reactive power characteristics 59 Table A:17 PQ curve 60 Table A:18 PQ curve at maximum voltage 61 Table A:19 PQ curve at minimum voltage 61 Table A:20 P-IUFi 62 Table A:21 Basic test information 63 Table A:22 static error 63 Table A:23 Dynamic response 63 Table A:24 Basic test information 64 Table A:25 Calculated value of active power ramp rate at startup 64 Table A:26 Basic test information 64 Table A:27 Start-up, active power ramp rate limit 65 Table A:28 Basic test information 65 Table A:29 During normal shutdown, active power ramp rate limit 65 Table A:30 Basic test information 66 Table A:31 During normal operation, active power ramp rate limit 66 Table A:32 Basic test information 67 Table A:33 When 0:25Pn< P< 0:5Pn, test 67 Table A:34 When P >0:8Pn, test 68 Table A:35 Comprehensive inertia test results 69 Table A:36 Basic test information 72 Table A:37 Static error 72 Table A:38 Dynamic response 73 Table A:39 Test results when the wind turbine is not connected to the grid 73 Table A:40 Test results when wind turbines are connected to the grid 75 Table A:41 Voltage protection test results 78 Table A:42 Frequency protection test results 78 Table A:43 Complete protection circuit test results 79 Table A:44 Rate of Change of Frequency (RoCoF) Test Results 79 Table A:45 Rate of Change of Frequency (RoCoF) test information 79 Table A:46 Re-connection test results 79 Table B:1 The rated value of the wind turbine during the confirmatory test 83 Table B:2 Relative current fluctuation input value corresponding to flicker coefficient c(ψk)=200×(1±5%) when Sk,fic=20Sn 84 Table B:3 When Sk,fic=50Sn, relative current change input value corresponding to flicker coefficient c(ψk)=200×(1±5%) 84 Table B:4 Test specifications for distorted voltages with multiple zero crossings 85 Table D:1 Example of measurement results 100 Table E:1 Index parameters (IEC TR61000-3-6) 104 Table F:1 Main components affecting the electrical performance of wind turbines 106

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 for Standardization Documents" drafting: This document replaces GB/T 20320-2013 "Wind Turbine Power Quality Measurement and Evaluation Method", and GB/T 20320- Compared with:2013, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Added "off-grid time", "rated active power", "reactive power capability", "short-circuit ratio", "voltage drop", "voltage increase", "fault wear-through "Over", "Low Voltage Ride Through", "High Voltage Ride Through", "Phasor", "Fundamental Positive Sequence Component", "Fundamental Negative Sequence Component", "Fundamental Zero Sequence Balance", "Control Interface", "Wind Farm", "Assessor", "Time Series", "Short Circuit Capacity", "Percentile", "Comprehensive Inertia", "Static Error", "Response Time", "Stable Time", "Rise Time", "Overshoot", "Reaction Time", "Fall Time", "Recovery Time", "Steady State" "Error Band" "Event Start Time" "Wind Turbine Product Platform" "Component Test" "Subsystem" "Subsystem Test" "Available Active power", "Power factor", "Ramp rate", "Reference value", "Active power range", "Virtual grid", "On-site measurement", "On-site measurement "Test" and "wind speed range" terms and definitions (see 3:3, 3:15, 3:16, 3:20, 3:26, 3:27, 3:28, 3:29, 3:30, 3:31, 3:32, 3:33, 3:34, 3:35, 3:36, 3:37, 3:38, 3:39, 3:40, 3:41, 3:42, 3:43, 3:44, 3:45, 3:46, 3:47, 3:48, 3:49, 3:50, 3:51, 3:52, 3:53, 3:54, 3:55, 3:56, 3:57, 3:58, 3:59, 3:60, 3:61, 3:62, 3:63, 3:64, 3:65, 3:66); b) The terms and definitions of "common connection point", "power collection system", "rated current", "rated wind speed" and "switching operation" have been changed (see 3:11, 3:12, 3:14, 3:17, 3:21, 3:10, 3:11, 3:13, 3:15, 3:18 of the:2013 edition); c) Delete the term "rated power" (see 3:14 of the:2013 edition); d) Added "finertia,recovery" "finertia,trigger" "fsim" "HW" "IUF" "PF" "SW" "Umin" "Umax" "UUVRC" "UOVRC" "Upre" symbol (see Chapter 4); e) The symbols "fm,i" "fy,i" "Nbin" "Nm,i" "Nm,i,c< x" "va" "vi" "ωi" are deleted (see Chapter 4 of the:2013 edition) ; f) Added the abbreviations "DFAG" and "RoCoF" (see Chapter 5); g) The abbreviation "PCC" has been deleted (see Chapter 5 of the:2013 edition); h) Added the requirement of "test level" (see 7:2); i) The test requirements and test methods for voltage-related PQ curves and unbalance degree are added (see 8:3:6, 8:3:7); j) Added test requirements and test methods for frequency control and integrated inertia (see 8:4:4, 8:4:5); k) Added test requirements and test methods for high voltage ride-through (see 8:5:2); l) Added the test requirements and test methods ......

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Question 1: How long will the true-PDF of GB/T 20320-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 20320-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 7 ~ 11 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 20320-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 20320-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

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Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 20320-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20320-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.