Measures to Improve the Low Voltage Ride Through Capability of High Power Inverter by Power Supply Transformation
At present,the domestic demand for natural gas is increasing year by year.The gas trans-mission 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 mea-sures for the transformation of the high-voltage and low-voltage power supply system of the electric-driven compressor station in the long-distance pipeline have reference significance for improving the de-sign of the power supply system and the stable operation of the electrical system in compressor stations.
inverterlow voltage ride through(LVRT)DC bushigh-speed transfer deviceDC power supply
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维普
