串联型MPPT空间电源系统稳定性技术  

Serial MPPT Electrical Power System Stability for Space Application

作　　者：林文立[1] 张晓峰[1] 杜青[1] 王超[1] 

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《中国空间科学技术》2014年第4期53-58,共6页Chinese Space Science and Technology

基　　金：国家自然科学基金(51307006);十二五装备预先研究(51320080401)资助项目

摘　　要：串联型最大功率点跟踪(MPPT)空间电源系统存在母线电压振荡或跌落等不稳定现象,文章以MPPT不调节母线电源拓扑为研究对象,建立了系统等效电路模型,通过小信号等效分析、状态空间方程特征根求解等手段,分别对MPPT控制域及电压控制域下电源系统的稳定性进行了分析。结果表明,在太阳电池阵及阵列功率调节器特性曲线一定的条件下,通过对二者间电感、电容参数合理配置,可以保证系统稳定。在MATLAB/SIMULINK中搭建了串联型MPPT不调节母线电源系统仿真模型并进行实例仿真,仿真结果验证了理论分析的正确性。Instability phenomena such as bus voltage fluctuations occur in serial maximum power point tracking （MPPT） electrical power system （EPS）. To study the stability, system equivalent circuit models were built based on a serial MPPT unregulated bus EPS topology for space application. The small-signal equivalent analysis method and eigen values of state space equations solving method were adopted to perform stability analysis in the MPPT control domain and the voltage control domain. Key conclusions are obtained under the conditions of constant solar array （SA） and array power regulator （APR） characteristics. The system stability depends on the parameters of inductors and capacitors between the SA and APR. A serial MPPT unregulated bus EPS model is built in MATLAB/SIMULINK, and the simulation results validate the above conclusions.

关 键 词：最大功率点跟踪 稳定性 小信号等效分析 状态空间方程 空间电源系统 

分 类 号：V423.44[航空宇航科学与技术—飞行器设计]