Maximum power point tracking（MPPT） can use the output power of the solar array in a maximum extent.The MPPT is especially beneficial to the deep space spacecraft because of its adaptibility to various changes of light intensity and temperature.The paper summarizes the topologies of space power system using MPPT and some foreign mission applications,such as Rosetta and MESSENGER spacecraft.The characteristics of MPPT topologies are analyzed,and the effects of space environment such as light intensity and temperature,load characteristics,and system stability on space power system are pointed out,which can be as a reference for the space power system design in Chinese deep space exploration.%最大功率点跟踪（MPPT）技术能够最大限度利用太阳电池阵输出功率,对于光强和温度变化较大的深空探测器,具有一定的优势。对MPPT电源系统拓扑结构及其在国外深空探测领域的典型应用,如＂罗塞塔＂（Rosetta）、＂信使＂（MESSENGER）探测器电源系统等,进行了调研和综述,分析了3种MPPT拓扑结构的特点,并指出光强、温度等空间环境因素,以及负载特性、系统稳定性对电源系统的影响,可为MPPT技术在我国深空探测器电源系统设计中应用提供参考。
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