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GB/T 34133-2017 English PDF (GBT34133-2017)

GB/T 34133-2017 English PDF (GBT34133-2017)

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GB/T 34133-2017: [Including 2018XG1] Testing code for power converter of electrochemical energy storage system

This standard specifies the testing items, testing conditions, testing devices, testing procedures of power converter of electrochemical energy storage system. This standard is applicable to low-voltage three-phase power conversion system which uses electrochemical battery as energy storage carrier and which has a DC side voltage of not more than 1000 V.
GB/T 34133-2017
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 27.180
F 19
Testing code for power converter of
electrochemical energy storage system
ISSUED ON: JULY 31, 2017
IMPLEMENTED ON: FEBRUARY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Testing conditions ... 7
5 Testing devices ... 8
6 Test items ... 11
Appendix A (Informative) Testing record ... 46
Appendix B (Normative) Determination method for the control response time and control accuracy of setting power ... 58
Appendix C (Normative) Testing rules ... 61
Testing code for power converter of
electrochemical energy storage system
1 Scope
This standard specifies the testing items, testing conditions, testing devices, testing procedures of power converter of electrochemical energy storage system.
This standard is applicable to low-voltage three-phase power conversion system which uses electrochemical battery as energy storage carrier and which has a DC side voltage of not more than 1000 V.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 2423.1 Environmental testing for electric and electronic products - Part 2: Test methods - Tests A: Cold
GB/T 2423.2 Environmental testing for electric and electronic products - Part 2: Test methods - Tests B: Dry heat
GB/T 2423.3 Environmental testing for electric and electronic products - Part 2: Testing method test Cab: Damp heat Steady state
GB/T 2423.4 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12 h + 12 h cycle)
GB/T 3859.1 Semiconductor converters - General requirements and line
commutated converters - Part 1-1: Specification of basic requirements
GB/T 4208 Degrees of protection provided by enclosure (IP code) (IEC
60529: 2001)
GB 4793.1 Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 1: General requirements
GB 4824 Industrial, scientific and medical (ISM) radio-frequency equipment - Electromagnetic disturbance characteristics - Limits and methods of
measurement
GB/T 7251.1 Low-voltage switchgear and control gear assemblies - Part 5: Particular requirements for assemblies for power distribution in public networks
GB/T 12325 Power quality - Deviation of supply voltage
GB/T 13422 Semiconductor converters - Electrical test methods
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Quality of electric energy supply - Admissible three-phase
voltage unbalance factor
GB/T 15945 Power quality - Frequency deviation for power system
GB/T 17626.2 Electromagnetic compatibility (EMC) - Testing and
measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement
techniques - Radiated radio-frequency electromagnetic field immunity test GB/T 17626.4 Electromagnetic compatibility - Testing and measurement
techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement
techniques - Surge immunity test
GB/T 17626.6 Electromagnetic compatibility - Testing and measurement
techniques - Immunity to conducted disturbances induced by radio-
frequency fields
GB/T 17626.15 Electromagnetic compatibility - Testing and measurement
techniques - Flicker meter - Functional and design specifications
GB/T 20840.2 Instrument transformers - Part 2: Supplementary technical
requirements for current transformers
GB/T 20840.3 Instrument transformers - Part 3: Supplementary technical
requirements for electromagnetic voltage transformers
3 Terms and definitions
The following terms and definitions apply to this document.
Grid simulator
A controllable AC power supply that simulates the output characteristics of the grid.
3.8
Transfer time between charge and discharge
The time required for the energy storage system to switch between the state of charge and the state of discharge. Generally, it refers to the average time as required to switch from the charge state at 90% rated power to the
discharge state at 90% rated power and the time as required to switch from the discharge state at 90% rated power to the charge state at 90% rated power.
4 Testing conditions
4.1 Environmental conditions
Testing shall be carried out under the following environmental conditions: a) Ambient temperature: 20 ??C ~ 30 ??C;
b) Relative humidity: ??? 90%;
c) Ambient air pressure: 86 kPa ~ 106 kPa.
4.2 Electrical conditions
4.2.1 Quality conditions of grid power
Testing shall be performed under the following quality conditions of grid power: a) The total distortion rate of voltage harmonics shall meet the requirements of GB/T 14549;
b) The deviation of grid frequency shall meet the requirements of GB/T 15945; c) The deviation of grid voltage shall meet the requirements of GB/T 12325; d) The three-phase unbalance of the grid voltage shall meet the
requirements of GB/T 15543.
4.2.2 Electrical safety requirements
The electrical safety of the test site shall meet the requirements of GB 4793.1. 5.4 DC power supply
In addition to the voltage and current accuracy requirements specified in 5.1, the DC power supply shall meet the following requirements:
a) The voltage?€?s regulation range shall cover the operating voltage range of the tested power conversion system. The power shall be at least 1.2 times the rated power of the tested power conversion system;
b) The voltage?€?s response time shall not exceed 20 ms;
c) The dynamic voltage transient shall be less than ??10% of the set point of voltage.
5.5 Battery simulator
The battery simulator shall meet at least the following requirements:
a) It shall meet the requirements of 5.4;
b) The energy shall be able to flow in both directions;
c) It shall be able to simulate the charge and discharge characteristics of the electrochemical battery. It should set the battery type, battery pack?€?s nominal voltage, battery pack?€?s capacity, and other parameters.
5.6 DC load
The DC load shall meet at least the following requirements:
a) It has adjustable resistance and can realize closed-loop control of voltage and current;
b) Adjust the current change step as generated by the load, which shall not exceed 0.01 A;
c) The allowable current at each voltage point shall be more than the
maximum current of the power conversion system;
d) It should use the passive components.
5.7 Island simulation load
In addition to the voltage and current accuracy requirements as specified in 5.1 of this standard, the island simulation load shall also meet the following functional and performance requirements:
a) The regulation accuracy of resistive load, inductive load, capacitive load shall not exceed 0.2%. The adjustment step shall not exceed 0.05% of
system is the maximum, intermediate, minimum values of the DC voltage
range;
d) Measure the actual current value at the DC side of the power conversion system. Use the formula (2) to calculate the current error of the power conversion system;
e) Fill the calculation results in the corresponding Tables in Appendix A. Where:
??I - Error of output current;
IZ - Measured current value;
IZ0 - Output current setting as set.
6.1.3.2 Testing of stabilized current precision of constant current charge Testing shall be carried out as follows:
a) Connect the testing circuit according to Figure 2. Adjust the tested power conversion system to work in constant current charge state.
b) Set the DC side current of the power conversion system to be 100%, 50%, 10% of the DC rated current, respectively.
c) Connect the battery simulator or resistive load. Adjust the battery simulator or resistive load, so that the DC side voltage of the power conversion
system changes within its DC voltage range, the change step is 20% of
the DC voltage range of the tested power conversion system. Each step
is kept at least 10 s. Record the DC current data in the course of charge, to obtain the maximum DC current fluctuation IM during the load change. d) Use the formula (3) to calculate the stabilized current precision.
Where:
??I - Stabilized current precision;
IM - Maximum output current fluctuation, in ampere (A);
IZ - Output current setting, in ampere (A).
b) Set the DC side voltage of the tested power conversion system to its maximum, intermediate, minimum values of the DC voltage range;
c) Connect the battery simulator or resistive load. Adjust the battery simulator or resistive load, so that the DC side current is 100%, 50%, 10% of the rated value of DC current, respectively;
d) Measure the actual voltage value of the DC side of the power conversion system. Use the formula (6) to calculate the voltage error of the power conversion system;
e) Fill the calculation results in the corresponding Tables in Appendix A. Where:
??U - The error of output voltage;
UZ - The measured voltage value;
UZ0 - The output voltage setting as set.
6.1.3.5 Testing of stabilized voltage precision of constant voltage charge Testing shall be carried out as follows:
a) Connect the testing circuit according to Figure 2. Adjust the tested power conversion system to operate it under constant voltage charge state;
b) Set the DC side voltage of the tested power conversion system to its maximum, intermediate, minimum values of the DC voltage range;
c) Connect the battery simulator or resistive load. Adjust the battery simulator or resistive load, so that the DC current of the power conversion system changes under 0% ~ 100% of DC rated current. The change step is 20%
of DC rated current. The holding time of each step shall not be less than 10 s. Measure the maximum fluctuation value UM of the DC side voltage;
d) Use the formula (7) to calculate the stabilized voltage precision of constant voltage charge.
Where:
??U - Stabilized voltage precision;
conversion system
6.3.2 Testing of rectification efficiency
Set the tested power conversion system to the grid-on operation status and follow the procedures below to carry out testing:
a) Connect the testing circuit according to Figure 4. Adjust the power
conversion system to operate in the rectification state;
b) Adjust the DC side voltage of the power conversion system to the upper limit of the regulation range of DC voltage;
c) Make the tested power conversion system run based on each 10% of rated power as an interval;
d) Use the data acquisition device to record the active power on the AC side and the active power on the DC side;
e) Use the formula (10) to calculate the rectification efficiency of the tested power conversion system;
f) Adjust the DC side voltage of the power conversion system to the
intermediate value and the lower limit of the regulation range of DC
voltage. Repeat steps c) ~ e).
Where:
??1 - Rectification efficiency;
pDC - DC output power, in watts (W);
pAC - AC input power, in watts (W).
6.3.3 Testing of inversion efficiency
According to the operating mode of the tested power conversion system, set the corresponding grid-on/grid-off state. Follow the procedures below to carry out the following testing:
a) Connect the testing circuit according to Figure 4. Adjust the power
conversion system to operate in the inversion state;
b) Adjust the DC side voltage of the power conversion system to the upper limit of the regulation range of DC voltage. Adjust the output voltage of the IAC - The AC side current value of the power conversion system.
Note: The standby state is that the power conversion system is in the hot standby state.
6.3.4.2 Testing of no-load loss
The testing of no-load loss shall be carried out as follows:
a) Connect the testing circuit according to Figure 4;
b) Make the power conversion system in no-load state;
c) Measure the DC side voltage and current data. Use the formula (13) to calculate the no-load loss (13).
Where:
Pnoload - The no-load power loss of the power conversion system;
UDC - The DC side voltage of the power conversion system;
IDC - The DC current value of the power conversion system.
Note: The no-load state is that the power conversion system is grid-off without load.
6.4 Testing of overload capability
Testing shall be carried out as follows:
a) The testing method shall meet the requirements specified in GB/T 13422; b) Control the AC side voltage of the power conversion system to be the rated voltage, the AC side current is 110% of the rated current. Hold for 10 min;
c) Control the AC side voltage of the power conversion system to be the rated voltage, the AC side current is 120% of the rated current. Hold for 1 min. 6.5 Testing of power quality
6.5.1 Testing of current harmonics
Testing shall be carried out as follows:
a) At the AC side of the power conversion system, connect the power quality measuring device;
to the resistive load. Follow the requirements of items a) ~ f) in 6.5.1, carry out testing for the voltage harmonics.
6.5.3 Testing of inter-current harmonics
Testing shall be carried out as follows:
a) At AC output side of the power conversion system, connect the power
quality measuring device;
b) Set the power conversion system to operate in a discharge state;
c) Starting from the minimum power at which the power conversion system runs continuously and normally, use 10% of the rated power of the power conversion system as an interval; make continuous measurement for 10
min per interval;
d) According to formula (16), take the time window Tw to measure and
calculate the effective value of the inter-current harmonic center subgroup; use the effective value of the 15 inter-current harmonic center subgroups within 3 s to calculate the root-mean-square value;
e) Calculate the root-mean-square value of each 3 s inter-current harmonic center subgroups as included in 10 min;
f) The highest measured frequency of inter-current harmonics shall reach 2 kHz;
g) Set the power conversion system to operate in the charging state, repeat steps c) ~ f).
Note: The effective value of the hth inter-harmonic center subgroup;
Where:
C10h+i - The effective value of the (10h + i)th root spectral component corresponding to the DFT output.
6.5.4 Testing of inter-voltage harmonics
The power conversion system is, under the grid-off operation mode, connected to the resistive load. Follow the requirements of items a) ~ f) of 6.5.3 to test the inter-voltage harmonics.
6.5.5 Testing of flicker
6.5.6.1 Grid-on three-phase unbalance
Testing shall be carried out as follows:
a) Set the power conversion system to work in the grid-on mode discharge state;
b) At the AC side of the power conversion system, connect the power quality measuring device;
c) Starting from the minimum power at which the power conversion system runs continuously and normally, use 10% of the rated power of power
conversion system as an interval. In each interval, make continuous
measurement of the current data for 10 min. Starting from the interval, use the formula (17) to calculate the root-mean-square value at the time period of 3 s. Calculate the root-mean-square value of 200 time period of 3 s in total;
d) Respective, record the 95% probability large value of the measured value of the negative sequence current imbalance as well as the maximum value of all measured values;
e) Set the power conversion system to work in the grid-on mode. Repeat the steps b) ~ d).
Where:
??k - The current or voltage imbalance as measured at the kth time within 3 s; m - The number of values taken at uniform interval within 3 s, (m ??? 6). 6.5.6.2 Grid-off three-phase unbalance
When the power conversion system is operated grid-off, follow the
requirements of items a) ~ d) in 6.5.6.1 to test the three-phase voltage unbalance.
6.5.7 Testing of DC component
Testing shall be carried out as follows:
a) At the AC side of the power conversion system, connect the power quality measuring device;
b) Adjust the output rated power at the AC side of the power conversion Where:
U?? - Deviation rate of output voltage;
Ure - Actual output voltage, in volts (V);
UN - Rated output voltage, in volts (V).
f) Under the condition of minimum voltage at DC side, connect any two
phases of the AC side of the power conversion system to a resistive load which has a rated power of 33% of the power conversion system. The
other phase is not connected to the load. Use a measuring device to
measure and record the voltage value at AC side. Calculate the three-
phase unbalance of AC side voltage.
g) Under the condition of minimum voltage on the DC side, connect any
phase at the AC side of the power conversion system to the resistive load of 33% of the rated power of the power conversion system. The other two phases are not connected to the load. Use a measuring device to measure and record the voltage value at AC side. Calculate the three-phase
unbalance of AC side voltage.
Note: g) applies to three-phase four-wire power conversion system.
6.5.9 Testing of deviation of output frequency
Testing shall be carried out as follows:
a) Connect the testing circuit according to Figure 5;
b) Adjust the battery simulator to simulate the battery?€?s discharge
characteristics. Adjust the power conversion system to operate in the grid- off mode;
c) Under the rated output power conditions, set load as resistive, resistance- inductivity (PF = 0.7) and resistance-capacitance (PF = 0.7), respectively. Use a measuring device to measure and record the AC output frequency;
d) Use the formula (10) to calculate the frequency deviation rate of the power conversion system in grid-off mode.
Testing shall be carried out as follows:
a) Adjust the power conversion system to operate in normal grid-on mode; b) Starting from the minimum power at which the power conversion system can run continuously and normally, use every 10% of rated active power
as an interval to carry out test;
c) Adjust the inductive reactive power as output by the power conversion system to the output limit of the inductive reactive power of the power conversion system. Record at least two 1 min inductive reactive power
and active power data;
d) Adjust the capacitive reactive power as output from the power conversion system to the output limit of the capacitive reactive power of the power conversion system. Record at least two 1 min capacitive reactive power
and active power data;
e) Use each 0.2 s data to calculate the average value of reactive power. Use each 0.2 s data to calculate the average value of active power. Use all the calculated 0.2 s average power to draw the react...

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