Locomotive variable-voltage variable-frequency auxiliary power frequency control method
A technology of variable voltage variable frequency and auxiliary power supply, which is applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of high energy consumption and increased equipment loss, and achieve the effect of reducing equipment loss and reducing noise
Inactive Publication Date: 2012-03-21
CRRC DALIAN CO LTD
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Moreover, the output frequency setting has no related control relationship with the auxiliary equipment of the locomotive. When the locomotive is running, the auxiliary equipment has been running at 50H, which consumes a lot of energy and increases equipment loss.
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[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0016] See attached figure 1 . Set temperature sensors on the locomotive transformer, traction motor and converter device respectively. Enter box 1, set the two-stage motor temperature setpoints D1, D2, transformer oil temperature setpoints M1, M2, converter coolant temperature setpoints S1, S2. Enter frame 2 to detect the speed of the locomoti...
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The invention relates to a locomotive variable-voltage variable-frequency auxiliary power frequency control method, comprising the following steps: setting two-stage motor temperature set values D1 and D2, transformer oil temperature set values M1 and M2 and current transformer coolant temperature set values S1 and S2; outputting the variable-voltage variable-frequency auxiliary power frequency to be 0Hz when the locomotive speed is less than 5km / h, outputting the variable-voltage variable-frequency auxiliary power frequency to be 25Hz if D is less than D1, M is less than M1 or S is less thanS1,; and outputting the variable-voltage variable-frequency auxiliary power frequency to be 33Hz if D is less than D2, M is less than M2 or S is less than S2, otherwise outputting the variable-voltage variable-frequency auxiliary power frequency to be 50Hz. According to different limit values of the load temperature of an auxiliary machine, equipment consumption is reduced when a variable-voltagevariable-frequency auxiliary power supply operates under different frequency working conditions, and noise when a locomotive pulls in is reduced.
Description
technical field [0001] The invention relates to railway locomotive technology, in particular to a method for controlling the frequency of a locomotive variable voltage variable frequency auxiliary power supply. Background technique [0002] Auxiliary equipment on locomotives such as traction fans, composite cooler fans, and transformer oil pumps are usually powered by locomotive auxiliary converters. According to different electrical load characteristics, the auxiliary converters output constant voltage constant frequency (CVCF) and variable Voltage variable frequency (VVVF) power supply. Among them, the VVVF power supply output frequency is 33Hz when the driver's speed control handle level is below level 4, and the output frequency is 50Hz in other working conditions. Since the minimum output frequency of the auxiliary power supply is 33Hz, the cooling fan will emit noise pollution greater than 73 decibels when the locomotive enters and exits the platform. Moreover, the o...
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Inventor 王威邸新元王明岩张丽红张律陶红杰
Owner CRRC DALIAN CO LTD