Distributed power conditioning unit of large-scale space solar power station  

作　　者：Xintong LI Jianwei MI Yiqun ZHANG Guanheng FAN Jie DU 

机构地区：[1]School of Mechano-electronic Engineering,Xidian University,Xi’an 710071,China [2]Shaanxi Key Laboratory of Space Solar Power Station System,Xidian University,Xi’an 710071,China [3]Academy of Advanced Interdisciplinary Research,Xidian University,Xi’an 710071,China

出　　处：《Chinese Journal of Aeronautics》2024年第8期421-434,共14页中国航空学报（英文版）

基　　金：supported by the Civil Aerospace Technology Research Project,China(No.D010103);the National Natural Science Foundation of China(Nos.52022075 and U1937202);the National Key R&D Program of China(No.2021YFB3900300).

摘　　要：In this paper,a multi-bus distributed Power Conditioning Unit(PCU)is proposed for the Space Solar Power Station with large scale photovoltaic(PV)array and power levels reaching MW level.In this unit,there are multiple independent PV arrays.In each PV array,there are multiple independent PV subarrays.In this paper,a V-P droop control method with adaptive droop coefficient is proposed,which modifies the droop intercept based on the bus voltage deviation and the power per unit value of the PV array.This method ensures the accuracy of bus voltage and achieves proportional distribution of power between PV arrays based on the proposed topology structure in this paper.When the load changes or the output power of the PV array fluctuates,this method can ensure that power is distributed proportionally.The principle and control method of the proposed droop control method is analyzed in this paper.The effectiveness of the method is verified through MATLAB/Simulink simulation and experiment.Simulation and experimental results show that the proposed method can achieve power distributed proportionally when load changes and PV output power fluctuates,reduce bus voltage error caused by line impedance and differences in rated power of different PV arrays,and improve the performance of PV power generation system applied to space.

关 键 词：Space Solar Power Station Photovoltaics Droop control DC confluence Power conditioning unit 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]