Hybrid power energy management system of trolley car and control method

Abstract

The invention discloses a hybrid power energy management system of a trolley car and a control method. The system comprises a fuel cell array, a one-way isolation type DC-DC (direct current) converter in cascade connection with the fuel cell array on the basis of a full-bridge no-voltage no-current switch topological structure, a storage battery, a two-way isolation type DC-DC converter in cascade connection with the storage battery on the basis of a full-bridge no-voltage no-current switch topological structure, a supercapacitor, a two-way isolation type DC-DC converter in cascade connection with the supercapacitor on the basis of a full-bridge no-voltage no-current switch topological structure, an energy management unit based on a DSP (digital signal processor) controller, an interface extension unit based on an FPGA (field programmable gate array) controller, a voltage acquisition and conditioning circuit, a current acquisition and conditioning circuit, a weak current supply unit and a brake resistor. The system can supply energy to a load quickly, the response speed of the system to the load is increased, the brake power can be recovered as much as possible, the fuel availability is improved, the purpose of fuel economy is achieved, the service life of the storage battery is prolonged, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of hybrid power, and in particular relates to a hybrid power energy management system and a control method of a tram. Background technique [0002] The extensive use of fossil fuels has caused serious environmental pollution. In addition, with the vigorous exploitation of fossil energy sources, traditional energy sources are decreasing day by day. The development and utilization of new energy sources are highly valued by various countries. Among many new energy applications, hydrogen energy, as a clean, efficient, safe and sustainable new energy, is regarded as the most promising clean energy in the 21st century and the development direction of human strategic energy. The most promising candidates. Hydrogen fuel cell is an energy conversion device that uses hydrogen as fuel. Its main advantages are not limited by the Carnot cycle, low operating temperature, high energy conversion efficiency, low noise, clea...

AI Technical Summary

Problems solved by technology

Although this strategy can improve the service life of the battery and the utilization rate of hydrogen energy, the strategy is mainly based on the state of charge of the lithium battery, and the state switching caused by the change of the load condition will be relatively slow, resulting in a slow response speed of the energy management strategy. Conducive to system stability

[0005]The existing hybrid energy management system provides energy to the load at a slow speed, which greatly reduces the speed of the system responding to the load; and cannot effectively recover the braking power, Significantly wastes braking power and reduces fuel cell utilization

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