基于小波变换的混合动力车辆功率分流策略分析  

Analysis of Power Dividing Strategy for a Hybrid Electric Vehicle Based on Wavelet Transform

作　　者：陈路明[1] 廖自力[1] 刘春光[1] 项宇[1] 

机构地区：[1]装甲兵工程学院控制工程系,北京100072

出　　处：《车辆与动力技术》2016年第2期7-11,共5页Vehicle & Power Technology

基　　金：军队预先研究项目(40401010101)

摘　　要：混合动力车辆通常具有两个或多个动力源,结构相对复杂,分流到各动力源的功率存在多种组合方式.常规功率分流策略如峰值电源最大荷电状态策略、恒温器策略等仅作用于时域空间,依据功率幅值进行分流,当功率波动剧烈时,产生的高频功率分量会对动力电池的性能造成负面影响.为消除这种影响,提出了基于小波变换的功率分流策略,在时频域空间将需求功率分解为若干高频分量和低频分量,确定各动力源功率分流情况,最后利用RT-LAB建立的整车模型进行仿真试验,将仿真结果与基于恒温器策略得到的仿真结果进行比较,验证基于小波变换的功率分流策略能更好地跟随功率变化,提高供电质量,延长电池寿命.Hybrid vehicles usually have two or more power sources so there are a variety of the power dividing strategies. Conventional strategies usually distribute the power in the time domain according to its amplitude, such as the strategy of the peak power with biggest SOC and the thermostat strategy. When the frenquency of the power fluctuation is high, its high frequency component of the power will have a negative effect on the batteries or other power sources. In order to cope with this problem, a power dividing strategy is proposed based on the wavelet transform. In the time -frequency domain, the needed power is decomposed into a number of high frequency and low frequency components, and distributed to each power source with a confirmed proportion. The vehicle model is tested in RT-LAB. The simulation results are compared with the outcomes from the thermostat strategy. The conclusion is that the studied strategy has advantages in following the power change well, improving the quality of power supply and extending the battery life.

关 键 词：混合动力车辆 功率分流策略 小波变换 恒温器策略 

分 类 号：TM761[电气工程—电力系统及自动化]