Regenerated energy storage system with diesel generator set as power source

Abstract

The invention discloses a regenerated energy storage system with a diesel generator set as a power source. The regenerated energy storage system comprises a diesel engine set, a driving circuit, an energy storage unit and a control unit. The control unit comprises an IGBT electrical energy conversion device. The energy storage unit is a lithium battery pack or a super-capacitor set. According to the regeneration energy storage system with the diesel generator set as the power source, regenerated electrical energy in an electric control system can be recycled while alternating-current variable frequency control of lifting machinery is achieved.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of energy-saving equipment, and in particular relates to a regenerative energy storage system using a diesel generator set as a power source. [0003] 【Background technique】 [0004] In special industrial occasions where there is no urban power grid or the power grid is unstable, a large number of lifting machines using diesel generator sets as the power source are used in large quantities. Class mechanical operation. In this process, a part of the electric energy is uselessly consumed. The specific performance is: the potential energy and braking energy generated during the operation of the lifting machinery are consumed by the braking resistor connected in parallel on the DC bus of the frequency converter in the form of heat in the frequency conversion system. scattered. [0005] At the same time, in order to meet the frequent and heavy load start-up of lifting machinery, the capacity of the diesel generat...

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Problems solved by technology

[0005] At the same time, in order to meet the frequent and heavy load start-up of lifting machinery, the capacity of the diesel generator set is much larger than the static power of the lifting machinery. Under normal circumstances, the diesel generator set still keeps running at full speed, so that the generated energy cannot be completely digested by the lifting machinery, and finally dissipated in the form of heat through the braking resistor connected in parallel on the DC bus of the inverter.

[0006] In domestic lifting machines that use the urban power grid as the power source, there is already a scheme that adopts an energy feedback rectifier unit, which can feed back the regenerative electric energy generated during the operation of the electronic control system to the power grid, but this scheme is not suitable for diesel generators. The generator set is used as the power source of the lifting machine, because the regenerative electric energy cannot be fed back to the diesel generator set

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