In this power conversion device for a railway vehicle, a converter control unit (242) provided in a control device (240) comprises: a relative voltage calculation unit (501) that calculates a relative voltage, which is a reference for current control of a converter (210), on the basis of a detected overhead line voltage value; and a voltage phase estimation unit (502) that estimates, on the basis of the relative voltage, the phase of the AC voltage applied to the auxiliary power supply device (107) during the non-power-supply period. The relative voltage calculation unit (501) includes: a phase difference estimation unit (810) that estimates a phase difference between a first phase and a second phase, the first phase being a phase of a first voltage when the overhead line voltage detected by the ACPT (102) is set to the first voltage after the end of the non-power-supply period, and the second phase being a phase of a second voltage when the overhead line voltage is set to the second voltage after the end of the non-power-supply period; the second phase is the phase of a second AC voltage estimated by a voltage phase estimation unit (502) on the basis of the overhead line voltage detected by the ACPT (102) before the start of the non-power supply period; and a switching unit (820) that switches a symbol of a frequency correction amount for correcting the frequency of the second voltage on the basis of an estimated phase difference, which is an estimated value of the phase difference.
在本发明的铁路车辆用功率转换装置中,设置在控制装置(240)中的转换器控制部(242)包括:基于架空线电压的检测值运算作为转换器(210)的电流控制的基准的相对电压的相对电压运算部(501);以及基于相对电压推测在无供电期间中施加到辅助电源装置(107)的交流电压的相位的电压相位推测部(502)。相对电压运算部(501)包括:推测第一相位和第二相位之间的相位差的相位差推测部(810),第一相位是将在无供电期间结束后ACPT(102)检测到的架空线电压设为第一电压时的该第一电压的相位,第二相位是电压相位推测部(502)基于在无供电期间开始前ACPT(102)检测到的架空线电压而推测出的交流的第二电压的相位;以及基于作为相位差的推测值的推测相位差来切换用于校正第二电压的频率的频率校正量的符号的切换部(820)。
Power conversion device for railway vehicle
铁路车辆用功率转换装置
2025-05-30
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |