Patent ID: 11949230
Assignee: CRRC ZHUZHOU LOCOMOTIVE CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. An energy balance control method fora hybrid power locomotive, wherein the energy balance control method comprises:
step 1: calculating a desired value of a required power of all loads according to a required power of each load;
step 2: determining an estimated output power of an energy storage element according to an available power and remaining electric quantity of the energy storage element;
step 3: calculating a power required to be output by a power pack according to the desired value of the required power of all loads obtained in step 1 and the estimated output power of the energy storage element obtained in step 2;
step 4: calculating a rotating speed of the power pack according to the power required to be output by the powerpack, and controlling the power pack to reach the rotating speed;
step 5: determining a voltage of an intermediate DC circuit according to the rotating speed of the power pack; and
step 6: taking the voltage of the intermediate DC circuit as a target voltage value, comparing an actual output voltage of the power pack with the target voltage value, and if the actual output voltage of the power pack is higher than the target voltage value, charging the energy storage element, otherwise discharging the energy storage element, so that the actual output voltage of the power pack is maintained at the target voltage value,
wherein in step 2, it is assumed that Estorage is the remaining electric quantity of the energy storage element, Etotal is a total electric quantity of the energy storage element, Pavailable is the available power of the energy storage element, and Pestimated is the estimated output power of the energy storage element;

when Estorage≥70%×Etotal,Pestimated=Pavailable;

when 50%×Etotal≤Estorage<70%×Etotal,Pestimate=60%×Pavailable;

when 30%×Etotal≤Estorage<50%×Etotal,Pestimated=20%×Pavailable;

when 10%×Etotal≤Estorage<30%×Etotal,Pestimated=−20%×Pavailable; and

when Estorage<10%×Etotal,Pestimated=−60%×Pavailable.