供电改造提升大功率变频器低电压穿越能力的措施  

Measures to Improve the Low Voltage Ride Through Capability of High Power Inverter by Power Supply Transformation

作　　者：蒲斌 杨福超 韩小虎 李扬 PU Bin;YANG Fuchao;HAN Xiaohu;LI Yang(West Pipeline Company,PipeChina)

机构地区：[1]国家管网集团西部管道公司

出　　处：《油气田地面工程》2024年第1期76-85,共10页Oil-Gas Field Surface Engineering

摘　　要：目前国内天然气需求逐年增长,输气管道常年高压力运行,变频器低电压穿越能力不断提升使电驱压缩机在电网波动时连续运行的能力增强,但是供电线路故障引起压气站供电系统短时失电导致的停机停输可能造成管线运行超压。从维持变频器直流母线电压的时间需求出发,通过线路分列运行、调整线路重合闸、快速切换装置等方式提升供电可靠性;根据励磁变频器在电源切换过程中直流母线电压的变化趋势,使用静态转换开关、增加变频器直流电源的方式提升励磁变频器的供电可靠性。长输管道电驱压气站高压、低压供电系统改造方案对于压气站供电系统设计及电气系统运行提升具有借鉴意义。At present,the domestic demand for natural gas is increasing year by year.The gas transmission pipeline operates under high pressure all year round,and the low voltage ride through capability of inverters has been continuously improved,which enhances the continuous operation ability of the electric-driven compressor in case of voltage drops.However,the power supply line failure may cause a short-term power outage in the compressor station power supply system,resulting in shutdown,which may cause pipeline operation overpressure.Starting from the time demand to maintain the DC bus voltage of the inverter,it is proposed to improve the reliability of the power supply by means of separate operation of the line,adjustment of the line reclosing method,and the use of a high-speed transfer device.According to the changing trend of the DC bus voltage of the excitation inverter during the power switching process,the method of using a static transfer switch and adding the inverter's DC power supply is proposed to improve the power supply reliability of the excitation inverter.The measures for the transformation of the high-voltage and low-voltage power supply system of the electricdriven compressor station in the long-distance pipeline have reference significance for improving the design of the power supply system and the stable operation of the electrical system in compressor stations.

关 键 词：变频器 低电压穿越 直流母线 快切装置 直流电源 

分 类 号：TE43[石油与天然气工程—油气田开发工程]