Anti-surge method of air compressor running at low power for fuel cell locomotive

Abstract

The invention provides a method for preventing surges of an air compressor in the process of low-power operation of a fuel cell locomotive. A power current collection module, a control object selection module, an air compressor control unit module and a bypass valve control module are included. The power current collection module is used for recording the current power of a fuel cell, sending the value of the recorded power to the control object selection module, and conveying currents to the air compressor control unit module and the bypass valve control module; the control object selection module is used for outputting a selection signal of a control object according to the collected power and the power limit set by the control object selection module; the air compressor control unit module is used for controlling the flow of an inlet of the fuel cell according to the set peroxide rate on the situation of high power of the fuel cell by controlling the air compressor under the normal working condition; the bypass valve control module is used for controlling the opening degree of a bypass valve to ensure that the flow of the inlet of the fuel cell meets the requirement of the set peroxide rate coefficient on the situation of low power of the fuel cell. According to the method for preventing the surges of the air compressor in the process of low-power operation of the fuel cell locomotive, under the condition that new technological devices do not need to be excessively added, or the technological process does not need to be greatly changed, only a bypass system is added, and the surges of the air compressor of a fuel cell locomotive system are prevented.

Description

technical field [0001] The invention relates to a method for preventing the surge of an air compressor when a fuel cell locomotive operates at low power, and belongs to the technical field of fuel cells. Background technique [0002] A fuel cell is a continuous power generation device that converts chemical energy in externally supplied fuel and oxidant into electrical energy. Because of its high power density and energy density, clean and efficient, and wide power range, fuel cells have broad application prospects in various fields such as micro power sources, mobile power sources, vehicle engines, and stationary power stations, so they have received extensive attention from countries all over the world. The United States, Japan, Canada, and European countries are actively developing fuel cell technology. At present, almost all major automobile manufacturers in the world are developing fuel cell electric vehicles, and China has also developed the first fuel cell locomotive....

AI Technical Summary

Problems solved by technology

However, due to the surge phenomenon of the air compressor on the fuel locomotive, the fuel cell locomotive inevitably causes the surge of the air compressor when the power output is low.

[0003] Although the anti-surge system of the Chinese patent [CN101303030A] can effectively ensure that the air compressor works in a non-surge area, it is only for a single air compressor system, but it is not suitable for the entire system of a fuel cell locomotive

[0006] Since the current anti-surge system for a single air compressor requires adding new process equipment or changing the process flow, it has the disadvantages of complex system design, complex implementation, and high operating costs, and the single air compressor anti-surge system When the power of the entire system of the fuel cell locomotive is low, the entire fuel cell locomotive system cannot work normally

There is still no complete control system for the anti-surge system of the air compressor in the fuel cell locomotive system at low power

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