T/CPSS 1007-2020 in English
VALIDTechnology specification of switching power supply for power line distortion immunity
- Issued on:2020-08-25
- Implemented on:2020-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
| Standard No: | T/CPSS 1007-2020 |
| Document status: | VALID |
| Title in English: | Technology specification of switching power supply for power line distortion immunity |
| Title in Chinese: | 开关电源交流电压畸变抗扰度技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-08-25 |
| Implemented on: | 2020-09-01 |
| Professional Classification: | T/-Social Organization Standard |
| Related Keywords: | key test waveform comparison typical distortion waveform parameters waveform
serious voltage waveform distortion power supply power line distortion immunity introduction technical background harmonic distortion |
| Related Topics: | Immunity Standard
AC Equipotential AC Impedance AC potential AC impedance AC impedance potential Related technology exchange Immunity Voltage in English distortion Used AC Power switching power supply dual power switch Voltage power supply iso17850 distortion High voltage switching power supply Switching power supply industry Switching power supply aging |
Introduction
Technical background of the standard
With the popularization of power electronic equipment, harmonic pollution in the power grid has led to increasingly serious voltage waveform distortion. TCPSS 1007-2020 systematically defines the adaptability requirements of switching power supplies in non-ideal power grid environments for the first time, filling the gap in my country's technical standards in this field.
Core term analysis
| Term | Definition | Test association |
|---|---|---|
| Grid distortion (PLD) | The degree to which the voltage waveform deviates from the standard sine wave | Basis for all test items |
| Total harmonic distortion (THD) | ≤2% @13th harmonic | Core indicators of clause 4.2 |
| Class A determination | The highest level of zero functional interruption | General requirements of 5.2/6.2/7.2 |
Key test waveform comparison
Typical distortion waveform parameters
| Waveform type | Characteristic parameters | Duration |
|---|---|---|
| Sudden change waveform (5.3.1) | 300Vac@1ms | Every 140 cycles |
| Flat-top wave (6.3.1) | 3/5/7th harmonic superposition | Last for 5 minutes |
| PLD-5 series (7.3.5) | 25ms-30s voltage drop | 10 cycles |
Note: The trapezoidal wave (Figure 7) and the peak wave (Figure 8) must be generated strictly according to the harmonic phase requirements of Table 4/Table 5
Key points for test implementation
- Use the Programmable AC power supply to accurately reproduce the distorted waveform defined in the standard
- When arranging the test, use the shortest power cord specified by the manufacturer (default ≤1m)
- The PLD-6 test requires the voltage change rate to be controlled to 2V/40s
Technology evolution analysis
Compared with the voltage sag test in GB 17626.11, this standard innovatively proposes:
- 8 types of synthetic waveform test scenarios
- Harmonic phase accurate control requirements (Table 1-7)
- 180s long-time half-wave distortion test (5.3.3)
Enterprise implementation suggestions
Power supply design optimization direction
According to the standard requirements, it is recommended to focus on strengthening:
- Band extension of input-stage EMI filter
- PFC circuit dynamic response speed (≤5ms)
- Energy storage capacitor withstand voltage margin (≥1.5 times)
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