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Hybrid Absorption Device

Hybrid type that is,  a combination of Energy recovery type and energy consumption type , or a combination of the other two modes. It has the characteristics of stable energy consumption and small investment, and also has the advantages of being economical and applicable.

DC-AC variable-voltage and variable-frequency (VVVF) transmission is generally used in urban rail transit systems. Locomotives are braked electrically (regenerative braking), the main method, and mechanically, the supporting method. A locomotive is frequently started and braked due to short inter-station distance and therefore generates considerable braking energy. According to experience, a part (20%-80%, up to the locomotive density and inter-station distance) of the regenerative braking energy produced by a metro locomotive is absorbed and utilized by adjacent locomotives, the rest part is mainly consumed by absorption resistors of the locomotive by getting heat or by the absorption devices installed in the rail. Resistors are mainly used to absorb the regenerative braking energy generated by locomotives in Chinese urban rail transit systems, which wastes energy, increases the burdens of air-conditioning systems in stations and increases the cost of urban rail transit construction and operation, all of which can be solved if such regenerative energy can be reused. 

Hybrid type that is,  a combination of Energy recovery type and energy consumption type , or a combination of the other two modes. It has the characteristics of stable energy consumption and small investment, and also has the advantages of being economical and applicable.

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