中文摘要：

新能源汽车产业革命推动了油电混合动力汽车的高速发展，在燃油经济性、整车动力性和续航里程上，混合动力系统具有不可比拟的优势。文章介绍了油电混合动力系统的定义及基本原理、混合动力汽车的发展现状，对比分析了不同类型混合动力系统的结构和特点。最后，对油电混合动力系统的关键技术进行了介绍，并对其发展趋势进行了预测。

英文摘要：

The new energy automotive industry revolution has promoted the rapid development of hybrid electric vehicles,which has incomparable advantages in fuel economy, vehicle power performance and cruising radius. This paper introducesthe definition and basic principles of the hybrid electric power system, the development status of hybrid electric vehicles, andthe structure and characteristics of different types of hybrid power system are compared and analyzed. At last, the keytechnologies of the hybrid electric power system are introduced, and the development trend is forecasted.