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GB/T 37423-2019 English PDF (GBT37423-2019)

GB/T 37423-2019 English PDF (GBT37423-2019)

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GB/T 37423-2019: Urban rail transit inverter for regenerative braking energy absorption

This standard specifies the use conditions, classification, specifications and models, technical requirements, test methods, inspection rules, markings, packaging, transportation and storage of the urban rail transit inverter for regenerative braking energy absorption. This standard is applicable to devices that absorb the regenerative braking energy by means of inverter feedback in urban rail transit DC traction power supply systems.
GB/T 37423-2019
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 29.280
S 30/39
Urban rail transit inverter for regenerative braking
energy absorption
ISSUED ON: MAY 10, 2019
IMPLEMENTED ON: DECEMBER 01, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Conditions of use ... 8
4.1 Environmental conditions ... 8
4.2 Power supply conditions... 8
5 Classification, specifications and models ... 9
5.1 Classification and specifications ... 9
5.2 Common specifications ... 9
5.3 Model ... 10
6 Requirements ... 10
6.1 General requirements... 10
6.2 Performance requirements ... 11
6.3 Functional requirements ... 13
6.4 Safety requirements ... 14
7 Test method ... 15
7.1 Insulation test ... 15
7.2 Auxiliary device test ... 17
7.3 Protection function test ... 17
7.4 Light load test ... 18
7.5 Load test ... 18
7.6 Test of current total distortion rate ... 19
7.7 Power efficiency test ... 20
7.8 Power factor test ... 20
7.9 Response time test... 20
7.10 Noise test ... 21
7.11 Temperature rise test ... 21
7.12 Three-phase voltage unbalance test ... 21
7.13 Electromagnetic compatibility test ... 22
8 Inspection rules ... 23
8.1 Type inspection ... 23
8.2 Exit-factory inspection ... 24
8.3 Inspection items ... 24
9 Markings ... 25
10 Packaging, transportation, storage ... 26
10.1 Packaging ... 26
10.2 Transportation ... 26
10.3 Storage ... 26
References ... 27
Urban rail transit inverter for regenerative braking
energy absorption
1 Scope
This standard specifies the use conditions, classification, specifications and models, technical requirements, test methods, inspection rules, markings, packaging, transportation and storage of the urban rail transit inverter for regenerative braking energy absorption (hereinafter referred to as the inverter device) .
This standard is applicable to devices that absorb the regenerative braking energy by means of inverter feedback in urban rail transit DC traction power supply systems.
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 1094.11 Power transformer - Part 11: Dry-type transformer
GB/T 1094.101 Power transformers - Part 101: Determination of sound
levels - Application guide
GB/T 15543-2008 Power quality - Three-phase voltage
GB/T 17626.2 Electromagnetic compatibility - Part 2: Testing and
measurement techniques - Electrostatic discharge immunity test
GB/T 17626.4 Electromagnetic compatibility - Part 4: Testing and
measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Part 5: Testing and
measurement techniques - Surge immunity test
GB/T 17626.6 Electromagnetic compatibility - Part 6: Testing and
measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.7-2017 Electromagnetic compatibility - Part 7: Testing and
measurement techniques - General guide on harmonics and inter-harmonics measurements and instrumentation, for power supply systems and
equipment connected thereto
GB/T 17626.8 Electromagnetic compatibility (EMC) - Part 8: Testing and
measurement techniques - Power frequency magnetic field immunity test
GB/T 17626.11 Electromagnetic compatibility - Part 11: Testing and
measurement techniques - Voltage dips, short interruptions and voltage
variations immunity tests
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Periodic intermittent duty
The working method that the operation of the inverter device is periodic and each period includes a duration of constant load operation and a duration of standby mode.
3.2
Periodic intermittent peak power
The maximum power that the inverter device can output under the periodic intermittent work system.
3.3
Harmonic (component)
A component whose frequency is an integer multiple of the fundamental
frequency, as obtained by Fourier series decomposition against the periodic alternating quantity.
[GB/T 14549-1993, definition 3.4]
3.4
Total distortion ratio; TDR
The ratio of the root mean square value of the total distortion content of an alternating variable to the root mean square value of the fundamental
4.2.2 The nominal voltage of the three-phase AC system of the inverter device can be divided into AC0.4 kV, AC10 kV, AC20 kV, AC35 kV; the corresponding voltage and frequency shall meet the following requirements:
a) The sum of the absolute value of the positive and negative deviations of the power supply voltage of 35 kV and above shall not exceed 10% of the nominal voltage;
b) The deviation of the three-phase power supply voltage of 20 kV and below shall be ??7% of the nominal voltage;
c) The frequency deviation limit should be ??0.2 Hz under normal operation conditions of the power system.
4.2.3 The auxiliary power supply shall meet the following requirements: a) DC220 V/110 V power supply: its voltage fluctuation range shall not
exceed 90% ~ 110% of the rated voltage. This power supply should supply power for the inverter device?€?s control, protection and other circuits; b) AC220 V/380 V power supply: its voltage fluctuation range shall not
exceed 85% ~ 110% of the rated voltage. This power supply should be
used for cooling fans, etc.
5 Classification, specifications and models
5.1 Classification and specifications
5.1.1 According to the input DC voltage level, the products can be divided into 750 series and 1500 series.
5.1.2 According to the AC voltage level, it can be divided into 0.4 kV, 10 kV, 20 kV, 35 kV and other types.
5.1.3 According to the periodic intermittent peak power, it can be divided into 500 kW, 1000 kW, 1500 kW, 2000 kW, 3000 kW, 4000 kW, etc.
5.2 Common specifications
Common specifications of inverter devices are as shown in Table 1.
6.3 Functional requirements
6.3.1 The stable DC voltage and constant power output functions of the inverter device shall meet the following requirements:
a) When the feedback power of the inverter device increases with the
increase of the regenerative braking power, the inverter device shall be able to control the DC voltage within the upper limit voltage within the peak power range;
b) When the DC voltage exceeds the upper limit voltage, the inverter device shall be able to maintain the peak power output, meanwhile the feedback power will no longer increase with the increase of the regenerative braking power.
6.3.2 The measurement and control system of the inverter device shall have the function of communicating with the host computer; meanwhile it can
remotely monitor the working status of the inverter device. The communication interface and communication protocol should meet the following requirements: a) When the physical interface is RS485 interface, the communication
protocol should be Modbus_RTU;
b) When the physical interface is an Ethernet interface, the communication protocol should be TCP/IP protocol.
6.3.3 The status display of the inverter device shall meet the following requirements:
a) The inverter device shall have a friendly human-computer interaction interface;
b) The inverter device shall monitor and display the operating status of main components such as switches and radiators.
6.3.4 The inverter device shall have the function of historical data recording and storage. The information collected and stored should include data such as AC side voltage, DC side voltage, total inverter feedback energy.
6.3.5 The inverter device shall have a protection function. Its protection function shall meet the following requirements:
a) When the inverter fails, the inverter device shall trigger the protection device or disconnect the inverter device.
b) When the AC voltage and DC voltage are abnormal, the inverter device withstanding voltage of the main circuit of the inverter device shall not be less than 5.6 kV/min;
b) Under the DC750 V power supply system, the power frequency
withstanding voltage of the main circuit of the inverter device shall not be less than 3.8 kV/min;
c) The power frequency withstanding voltage of the secondary circuit of the inverter device shall not be lower than 2 kV/min.
6.4.2 The impulse withstanding voltage of the inverter device shall meet the following requirements:
a) Under the DC1500 V power supply system, the impulse withstanding
voltage of the main circuit of the inverter device shall be 18 kV; its
waveform shall be 1.2/50 ??s;
b) Under the DC750 V power supply system, the impulse withstanding
voltage of the main circuit of the inverter device shall be 12 kV; its
waveform shall be 1.2/50 ??s.
6.4.3 The insulation resistance of the inverter device shall meet the following requirements:
a) In the DC1500 V power supply system, the insulation resistance of the main circuit of the inverter device shall not be less than 2 M??;
b) In the DC750 V power supply system, the insulation resistance of the main circuit of the inverter device shall not be less than 1 M??.
6.4.4 The inverter cabinet in the inverter device shall be installed with insulation; a frame leakage protection shall be set between the cabinet and the earth in the substation.
6.4.5 The cables of the inverter device shall be halogen-free, low-smoke, flame- retardant cables.
7 Test method
7.1 Insulation test
7.1.1 Insulation voltage test
7.1.1.1 When the main circuit of the inverter device is subjected to the power frequency withstanding voltage test, the transformer part shall be separately subjected to the power frequency withstanding voltage test; the test of the less than 1 M??. The insulation resistance of the DC1500 V inverter device shall not be less than 2 M??.
7.1.2.4 When the inverter device is subject to the insulation resistance test, if there is grounding resistance in the circuit, the grounding resistor shall be disconnected.
7.1.2.5 If water is used as the heat transfer medium, the insulation resistance may be measured in the absence and presence of water. The insulation level when there is no water shall meet the requirements of 7.1.2.3.
7.2 Auxiliary device test
7.2.1 When the closing and opening commands of switches such as contactors are given, the switches shall be activated, and the status indication or display of each switch shall be consistent with the switch status.
7.2.2 The start and stop of the fan shall work normally.
7.2.3 The man-machine interface?€?s operation function and display data shall be accurate; its inspection can be combined with the light load test.
7.3 Protection function test
7.3.1 A signal source can be used to signal a voltage-type or current-type frame protector. When the signal source is adjusted so that the signal reaches the protection limit, the frame leakage protection shall be activated, and the frame leakage fault information shall be output.
7.3.2 When the DC voltage is adjusted to be higher than the overvoltage protection limit of the inverter device, the DC overvoltage protection shall be activated, and the DC overvoltage fault information shall be output.
7.3.3 When the DC voltage is adjusted to be lower than the under-voltage limit of the inverter device, the DC under-voltage protection shall be activated, and the DC under-voltage fault information shall be output.
7.3.4 When the AC voltage is adjusted to be higher than the overvoltage limit of the inverter device, the AC overvoltage protection shall be activated, and the AC overvoltage fault information shall be output.
7.3.5 When the AC voltage is adjusted to be lower than the under-voltage limit of the inverter device, the AC under-voltage protection shall be activated, and the AC under-voltage fault information shall be output.
7.3.6 A signal source can be used to apply a signal to the overcurrent protection circuit. When the adjustment signal reaches the overcurrent protection limit, the overcurrent protection shall act and output the overcurrent fault information; if the inverter device is in the structure of multiple power unit in series or parallel connections, each unit shall be tested separately.
7.3.7 When the power unit is subjected to a simulated over-temperature test, once the temperature limit is reached, the temperature protection shall be activated, and the over-temperature fault information shall be output. If the inverter device is in the structure of multiple power unit in series or parallel connections, each unit shall be tested separately.
7.3.8 When the DC input voltage is maintained normal and the AC grid voltage is cut off, the AC grid?€?s power failure protection shall be activated and the AC grid power failure information shall be output.
7.4 Light load test
The light load test should be carried out according to the following steps: a) Adjust the input voltage to reach the rated value;
b) Adjust the output voltage to reach the rated value;
c) Adjust the output current to no more than 30% of the peak current;
d) The display, protection, cooling functions of the inverter device shall be normal.
7.5 Load test
The load test should be carried out according to the following steps:
a) The test circuit may be the test circuit as shown in Figure 3 or Figure 4; b) Adjust the output current of the inverter device under the rated voltage, until the inverter device outputs peak power;
c) In the periodic intermittent working mode, the operation of each part of the inverter device shall be normal.
7.10 Noise test
The noise test shall meet the following requirements:
a) When the inverter outputs the peak power in the periodic intermittent working system, place the sound level meter at a distance of 1 m from the bottom plane of the inverter and the front, back, left, and right sides of the inverter?€?s casing for measurement. The sound level meter?€?s measurement
adopts the A weighting method. The measured A weighted sound pressure
level is averaged.
b) During the test, the difference between the measured noise and the
background noise shall not be less than 3 dB. When the difference
between the measured noise value and the background noise value is
greater than 10 dB, the measured value is not corrected. When the
difference between the measured noise and the background noise is 3 dB, the correction value shall be -3 dB. When the difference between the
measured noise and the background noise is 4 dB ~ 5 dB, the correction
value shall be -2 dB. When the difference between the measured noise
and the background noise is 6 dB ~ 10 dB, the correction value shall be - 1 dB. After the noise value is corrected, its value shall meet the
requirements of 6.2.5.
7.11 Temperature rise test
When the peak power is output in the periodic intermittent working system, the tested inverter device shall include the temperature of each part of the inverter and the transformer (iron core and winding). The temperature rise after each measuring point reaches thermal equilibrium shall meet the requirements of 6.2.6.
7.12 Three-phase voltage unbalance test
The three-phase voltage unbalance test should be carried out according to the following steps:
a) When the inverter device is working normally and the load is symmetrical, adjust the inverter device?€?s current to make it reach the current under the peak power;
b) According to the provisions of 6.2 ~ 6.4 of GB/T 15543-2008, measure and calculate the three-phase output line voltage. The calculated value shall meet the provisions of 6.2.7.
c) The location sign shall have the words such as layer height, upward, avoid moisture, and handle with care, etc.;
d) Overall dimensions of the packing box;
e) Factory address.
10 Packaging, transportation, storage
10.1 Packaging
10.1.1 The inverter device or individually packaged components (parts) shall be packaged by waterproof materials. Meanwhile they shall be packed in a shock- proof packaging box, with moisture-proof and mildew-proof measures. The two sides of the packing box shall be marked with the center of gravity and lifting points via international symbols and patterns.
10.1.2 Technical documents shall include the following contents:
a) Product specification;
b) Exit-factory inspection report;
c) Product qualification certificate;
d) Packing list;
e) Warranty card;
f) List of accompanying accessories.
10.2 Transportation
During transportation, the inverter device shall not be subject to severe vibration or impact; it shall not be tilted or turned upside down.
10.3 Storage
During storage, the inverter device shall be placed in a ventilated warehouse without corrosive gas. The storage temperature shall be -25 ??C ~ 55 ??C. It shall not be exposed to rain, sun, condensation and frost. If water cooling equipment is equipped, it shall drain the cooling water remaining during the test.

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