Power supply system and power supply control method

Abstract

The invention provides a power supply system and a power supply control method. The power supply system comprises a plurality of inverters, a plurality of controllers, a plurality of current sensors and a voltage sensor, wherein input ends of the plurality of inverters are connected to a same power supply input end; an output end of each inverter is connected with one current sensor; one current sensor is connected with one controller; the output ends of the plurality of inverters are connected with the same voltage sensor; the voltage sensor is also connected with the plurality of controllers; and one controller is also connected with a control terminal of one inverter and also connected with the other controllers in the plurality of controllers to receive current which is transmitted from the other controllers and detected by the current sensors connected with the other controllers. According to the power supply system and the power supply control method, the inverters connected withthe controllers are controlled and adjusted through the controllers to achieve uniform current among different inverters, so that circulating current is avoided, interruption of power supply is effectively avoided and normal operation of a vehicle is ensured.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a power supply system and a power supply control method. Background technique [0002] The inverter is the most critical device in the auxiliary power supply of subways and light rails. It is used to convert DC power into AC power to supply power to auxiliary equipment such as air conditioning units, ventilation devices, and lighting devices on vehicles. [0003] At present, the auxiliary system of the whole vehicle can usually be supplied with centralized power through an inverter. If the inverter is damaged, it will directly affect the normal operation of the auxiliary equipment on the vehicle, thereby affecting the stable operation and comfort of the vehicle. In order to solve this problem, multiple inverters can be used to operate in parallel to supply power. When one auxiliary inverter fails, the other inverters can still operate normally and continue to supply power to...

AI Technical Summary

Problems solved by technology

[0004] However, during the parallel operation of multiple inverters, it is usually difficult to achieve current sharing between different inverters, and circulating currents are prone to occur, resulting in huge power supply system losses, and even collapse of the power supply system, resulting in interruption of power supply and affecting the normal operation of the vehicle

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