US 11,949,230 B2
Hybrid power locomotive and energy balance control method and system thereof
Hongtao Liao, Hunan (CN); Wei Wang, Hunan (CN); Qingmin Qin, Hunan (CN); Zhe Chen, Hunan (CN); and Qiang Fu, Hunan (CN)
Assigned to CRRC ZHUZHOU LOCOMOTIVE CO., LTD., Hunan (CN)
Appl. No. 17/927,673
Filed by CRRC ZHUZHOU LOCOMOTIVE CO., LTD., Hunan (CN)
PCT Filed Nov. 18, 2020, PCT No. PCT/CN2020/129764
§ 371(c)(1), (2) Date Nov. 23, 2022,
PCT Pub. No. WO2021/238101, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 202010473877.8 (CN), filed on May 29, 2020.
Prior Publication US 2023/0178981 A1, Jun. 8, 2023
Int. Cl. H02J 1/10 (2006.01); B60L 50/61 (2019.01); B61C 3/02 (2006.01); B61C 17/06 (2006.01); H02J 7/00 (2006.01); H02J 7/14 (2006.01); H02P 9/02 (2006.01); H02P 101/40 (2015.01)
CPC H02J 1/106 (2020.01) [B60L 50/61 (2019.02); B61C 3/02 (2013.01); B61C 17/06 (2013.01); H02J 7/00712 (2020.01); H02J 7/1446 (2013.01); H02P 9/02 (2013.01); B60L 2200/26 (2013.01); H02J 2310/48 (2020.01); H02P 2101/40 (2015.01)] 6 Claims
OG exemplary drawing
 
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.