Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Machinery Industry Federation.
This standard is under the jurisdiction of the National Technical Committee on Wind Power Machinery of Standardization Administration of China (SAC/TC 50).
Wind turbines - Test procedure of grid adaptability
1 Scope
This standard specifies the test content, test equipment, test procedures and test report content of grid adaptability test for wind turbine generator system (hereinafter referred to as “wind turbines”).
This standard is applicable to the grid-connected wind 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 12325 Power quality - Deviation of supply voltage
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 19963 Technical rule for connecting wind farm to power system
GB/T 24337 Power quality - Interharmonics in public supply network
JJF 1059.1 Evaluation and expression of uncertainty in measurement
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
grid adaptability of wind turbine
the response characteristics of wind turbines in the case of grid voltage deviation, frequency deviation, three-phase voltage unbalance, voltage fluctuation and flicker, and harmonic voltage
3.2
point of connection of wind turbine/point of test of wind turbine
the point at which the voltage or frequency variation occurs, which is the connection point between the grid disturbance generating device and the high voltage side of the step-up transformer of wind turbine
3.3
no-load testing
a test for the voltage or frequency variation generated by the test device at the point of test of wind turbine in the event that the wind turbine is disconnected from the grid
3.4
on-load testing
a test for the voltage or frequency variation generated by the test device at the point of test of wind turbine in the event that the wind turbine is connected to the grid
3.5
inertia response of wind turbine
the characteristic that the active output of the wind turbine varies with time after the frequency discontinuity of grid, which is referred to as the inertia response
3.6
active power-frequency regulation coefficient
Kf
the ratio of the pre-unit value of active power variation of the wind turbine (based on the rated power of wind turbine) to that of the frequency variation of the system (based on the rated power of the system) in the event that the system frequency fluctuates, which shall be calculated using Formula (1).
(1)
where,
ΔP——the variation in the output active power of the wind turbine, kW;
Pn——the rated power of the wind turbine, kW;
Δf——the variation in the system frequency, Hz;
fn——the rated power of the system, Hz.
4 Symbols
For the purposes of this document, the following symbols apply.
Kf: the active power-frequency regulation coefficient.
Kf1: the active power-frequency up-regulation coefficient.
Kf2: the active power-frequency down-regulation coefficient.
Δf: the variation in the system frequency.
F: the actual frequency at the point of connection of wind turbine.
fn: the rated frequency of the system.
ΔP: the variation in the output active power of the wind turbine;
P: the actual output of the wind turbine.
Pn: the rated power of the wind turbine.
Plt: the long-term flicker coefficient;
Pst: the short-term flicker coefficient.
5 Basic requirements
5.1 In accordance with those specified in GB/T 19963, the grid adaptability of wind turbine shall include: voltage deviation adaptability, frequency deviation adaptability, three-phase voltage unbalance adaptability, flicker adaptability and harmonic voltage adaptability.
5.2 The test results are only valid for the tested wind turbine with particular configuration. Other wind turbine configurations, including changing control parameters, can cause test results to change and require additional evaluation.
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Basic requirements
6 Test content
6.1 Voltage deviation adaptability
6.2 Frequency deviation adaptability
6.3 Three-phase voltage unbalance adaptability
6.4 Flicker adaptability
6.5 Harmonic voltage adaptability
7 Test equipment
7.1 Test device
7.2 Measuring equipment
8 Test procedures
8.1 Basic conditions
8.2 No-load testing
8.3 On-load testing
9 Test report content
9.1 Test record data
9.2 Calculated parameter indexes
9.3 Uncertainty
Annex A (Informative) Determination and calculation of response time
Annex B (Informative) Report format sample
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Machinery Industry Federation.
This standard is under the jurisdiction of the National Technical Committee on Wind Power Machinery of Standardization Administration of China (SAC/TC 50).
Wind turbines - Test procedure of grid adaptability
1 Scope
This standard specifies the test content, test equipment, test procedures and test report content of grid adaptability test for wind turbine generator system (hereinafter referred to as “wind turbines”).
This standard is applicable to the grid-connected wind 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 12325 Power quality - Deviation of supply voltage
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 19963 Technical rule for connecting wind farm to power system
GB/T 24337 Power quality - Interharmonics in public supply network
JJF 1059.1 Evaluation and expression of uncertainty in measurement
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
grid adaptability of wind turbine
the response characteristics of wind turbines in the case of grid voltage deviation, frequency deviation, three-phase voltage unbalance, voltage fluctuation and flicker, and harmonic voltage
3.2
point of connection of wind turbine/point of test of wind turbine
the point at which the voltage or frequency variation occurs, which is the connection point between the grid disturbance generating device and the high voltage side of the step-up transformer of wind turbine
3.3
no-load testing
a test for the voltage or frequency variation generated by the test device at the point of test of wind turbine in the event that the wind turbine is disconnected from the grid
3.4
on-load testing
a test for the voltage or frequency variation generated by the test device at the point of test of wind turbine in the event that the wind turbine is connected to the grid
3.5
inertia response of wind turbine
the characteristic that the active output of the wind turbine varies with time after the frequency discontinuity of grid, which is referred to as the inertia response
3.6
active power-frequency regulation coefficient
Kf
the ratio of the pre-unit value of active power variation of the wind turbine (based on the rated power of wind turbine) to that of the frequency variation of the system (based on the rated power of the system) in the event that the system frequency fluctuates, which shall be calculated using Formula (1).
(1)
where,
ΔP——the variation in the output active power of the wind turbine, kW;
Pn——the rated power of the wind turbine, kW;
Δf——the variation in the system frequency, Hz;
fn——the rated power of the system, Hz.
4 Symbols
For the purposes of this document, the following symbols apply.
Kf: the active power-frequency regulation coefficient.
Kf1: the active power-frequency up-regulation coefficient.
Kf2: the active power-frequency down-regulation coefficient.
Δf: the variation in the system frequency.
F: the actual frequency at the point of connection of wind turbine.
fn: the rated frequency of the system.
ΔP: the variation in the output active power of the wind turbine;
P: the actual output of the wind turbine.
Pn: the rated power of the wind turbine.
Plt: the long-term flicker coefficient;
Pst: the short-term flicker coefficient.
5 Basic requirements
5.1 In accordance with those specified in GB/T 19963, the grid adaptability of wind turbine shall include: voltage deviation adaptability, frequency deviation adaptability, three-phase voltage unbalance adaptability, flicker adaptability and harmonic voltage adaptability.
5.2 The test results are only valid for the tested wind turbine with particular configuration. Other wind turbine configurations, including changing control parameters, can cause test results to change and require additional evaluation.
Contents of GB/T 36994-2018
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Basic requirements
6 Test content
6.1 Voltage deviation adaptability
6.2 Frequency deviation adaptability
6.3 Three-phase voltage unbalance adaptability
6.4 Flicker adaptability
6.5 Harmonic voltage adaptability
7 Test equipment
7.1 Test device
7.2 Measuring equipment
8 Test procedures
8.1 Basic conditions
8.2 No-load testing
8.3 On-load testing
9 Test report content
9.1 Test record data
9.2 Calculated parameter indexes
9.3 Uncertainty
Annex A (Informative) Determination and calculation of response time
Annex B (Informative) Report format sample
