石化企业低压变频器电压暂降耐受能力分析与测试

doi:10.3969/j.issn.1005-8168.2022.03.001

converter；voltage sag；mechanism analysis；sag test
,"/> Analysis and Test of Voltage Sag Tolerance of Low Voltage Converter in Petrochemical Enterprises

Petrochemical Design ›› 2022, Vol. 39 ›› Issue (3): 1-4.doi: 10.3969/j.issn.1005-8168.2022.03.001

• DESIGN TECHNOLOGY • Next Articles

Analysis and Test of Voltage Sag Tolerance of Low Voltage Converter in Petrochemical Enterprises

Li Jun¹, Zou Lin², Shi Zhentang¹, Zhang Hongyang¹, Liu Weigong¹

（1. SINOPEC Dalian Research Institute of Petroleum and Petrochemicals, Dalian, Liaoning, 116045; 2. SINOPEC Shengli Oilfield Company, Dongying, Shandong, 257000）

Received:2022-03-07 Online:2022-08-25 Published:2022-08-29

Abstract

Abstract:

Converter is a power electronic equipment with weak resistance to voltage sag, which affects the operation of unit for many times. In this paper, the energy balance relationship of converter is studied, and the sag duration of converter under three-phase short circuit is deduced. Using the duration equation, the key factors affecting the immunity of converter are analyzed. The converter experimental platform is built to measure the sag immunity of converter under different sag depths and different load rates. The sag inflection point of converter is related to the load rate. The heavier the load, the shorter the sag duration. The sag depth of converter is related to the frequency. The lower the frequency, the stronger the voltage sag tolerance. According to the test conclusions, the application scope of different sag immunity means are analyzed. External power supply is suitable for key processes, and changing the control strategy is suitable for non-core processes. The conclusions can provide reference for the sag treatment of converters in petrochemical industry.

Key words:

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Li Jun, Zou Lin, Shi Zhentang, Zhang Hongyang, Liu Weigong.

Analysis and Test of Voltage Sag Tolerance of Low Voltage Converter in Petrochemical Enterprises [J].Petrochemical Design, 2022, 39(3): 1-4.

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Analysis and Test of Voltage Sag Tolerance of Low Voltage Converter in Petrochemical Enterprises

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