李铜林. 提高高压变频器安全性及运行可靠性的策略[J]. 南方能源建设,2024,11(5):1-6.. DOI: 10.16516/j.ceec.2023-184
引用本文: 李铜林. 提高高压变频器安全性及运行可靠性的策略[J]. 南方能源建设,2024,11(5):1-6.. DOI: 10.16516/j.ceec.2023-184
LI Tonglin. Strategies for improving the safety and operational reliability of high-voltage frequency converters [J]. Southern energy construction, 2024, 11(5): 1-6. DOI: 10.16516/j.ceec.2023-184. DOI: 10.16516/j.ceec.2023-184
Citation: LI Tonglin. Strategies for improving the safety and operational reliability of high-voltage frequency converters [J]. Southern energy construction, 2024, 11(5): 1-6. DOI: 10.16516/j.ceec.2023-184. DOI: 10.16516/j.ceec.2023-184

提高高压变频器安全性及运行可靠性的策略

Strategies for Improving the Safety and Operational Reliability of High-Voltage Frequency Converters

  • 摘要:
      目的  “节能减排”是近些年来国家对工业项目的技术要求,变频技术可使工艺设备在不同工况下调整出力,从而节约资源。但变频器属于电力电子设备,IGBT元件本身故障率相对较高,且对运行环境要求苛刻,因此提高高压变频器的安全性、运行可靠性十分重要。
      方法  在高压变频器个别功率单元故障退出情况下,依据中性点漂移技术,调整中性点位置及三相电压之间的夹角,使高压变频器可以在旁路掉部分故障功率单元后仍可以正常运行;将高压变频器的实时状态送至DCS,根据DCS逻辑组态,实现高压变频器整机自动旁路技术;设置单独的高压变频器室,通过空调、通风、风道系统等,为高压变频器提供一个相对较好的运行环境。
      结果  通过对高压变频器采取内部策略和外部环境策略后,高压变频器的故障率有所降低,延长了高压变频器的无故障安全运行时间。
      结论  采用中性点漂移技术及整机自动旁路技术,可以降低高压变频器的故障概率及频次;联合改善运行环境的温度和湿度条件,可以提高变频器持续可靠运行时间,对提高变频器的安全性及运行可靠性有显著帮助。

     

    Abstract:
      Introduction  "Energy saving and emission reduction" is the national technical requirement for industrial projects in recent years, and the frequency conversion technology can make process equipment adjust output under different working conditions, thereby saving resources. However, frequency converters are power electronic devices, and the failure rate of IGBT components is relatively high, and the requirements for the operating environment are harsh. Therefore, it is very important to improve the safety and operational reliability of high-voltage frequency converters.
      Method  In the case of failure of individual power units of the high-voltage frequency converter, according to the neutral point drift technology, the position of the neutral point and the angle between the three-phase voltages are adjusted, so that the high-voltage frequency converter can bypass some faulty power units can still operate normally; Send the real-time status of the high-voltage inverter to the DCS, and realize the automatic bypass technology of the high-voltage inverter according to the logic configuration of the DCS; Set up a separate high-voltage inverter room to provide a relatively good operating environment for high-voltage inverters through air conditioning, ventilation, and air duct systems.
      Result  After adopting the internal strategy and external environment strategy for the high-voltage inverter, the failure rate of the high-voltage inverter is reduced, and the safe operation time of the high-voltage inverter is prolonged.
      Conclusion  The use of neutral point drift technology and the automatic bypass technology of the whole machine can reduce the failure probability and frequency of high-voltage inverters, and jointly improve the temperature and humidity conditions of the operating environment, which can increase the continuous and reliable operation time of the inverter, to greatly improve the safety and operation reliability of inverters.

     

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