Hybrid energy storage-based regenerative electric energy recovery utilization experiment system

Abstract

A hybrid energy storage-based regenerative electric energy recovery utilization experiment system is disclosed and comprises a direct current power source, a regenerative electric energy simulation system, a hybrid energy storage system, a direct current braking resistor cabinet and a host computer control system, wherein an input side of the direct current power source is connected with three phase mains supply, a connection platform for a direct current bus is formed on an output side, the regenerative electric energy simulation system comprises a first bidirectional DC / DC converter and a first lithium battery energy storage system, and a high-voltage side of the first bidirectional DC / DC converter is connected with two ends of the direct current bus while a low-voltage side is connectedwith the first lithium battery energy storage system; the host computer control system is in connection and communication with the first bidirectional DC / DC converter, a second bidirectional DC / DC converter and a third bidirectional DC / DC converter. The system is advantageous in that control effects exerted by control strategies in an actual system can be well verified.

Description

technical field [0001] The invention relates to the technical field of regenerative electric energy recovery, in particular to an experimental system for regenerative electric energy recovery and utilization based on hybrid energy storage. Background technique [0002] At present, rail transit and elevators generally adopt the combination of DC power supply and variable voltage and frequency conversion to provide the electric energy required by the motor. When in the braking state, the motor can convert mechanical energy into electrical energy, and feed back the electrical energy to the DC power supply network through the variable voltage and frequency inverter. This part of energy generally accounts for more than 20% of the system's energy consumption. The regenerative power will increase the DC bus voltage and affect the safe operation of the system. The traditional way is to use resistance dissipation to suppress the voltage rise, but this causes a great waste of regenera...

AI Technical Summary

Problems solved by technology

However, due to the high power and high energy characteristics of regenerative electric energy, commonly used control strategies tend to lead to large capacity redundancy in the energy storage system, and the economy is poor, so it is difficult to effectively promote it in practical applications.

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