分布式光-儲發(fā)電系統(tǒng)的雙向DC-DC非線性控制
發(fā)布時間:2018-10-08 07:59
【摘要】:近年來,分布式光-儲發(fā)電系統(tǒng)正在迅速發(fā)展,儲能跟蹤源-網側功率指令的能力成為研究熱點。首先建立儲能系統(tǒng)中非隔離型雙向DC-DC變換器在電流連續(xù)模式下的仿射非線性模型,并引入電壓跟蹤參數(shù),得到大信號建模下的非線性狀態(tài)空間描述;然后,依據狀態(tài)反饋線性化條件,建立虛擬輸出,利用非線性變換映射非線性空間至線性空間,并分析線性空間內二階經典控制系統(tǒng)的參數(shù)對系統(tǒng)性能影響,計算狀態(tài)反饋系數(shù),完成控制器設計;最后,經數(shù)字仿真及實驗,證明了所提控制方法可準確、快速地實現(xiàn)功率指令跟蹤功能,在電壓擾動、負載突變及系統(tǒng)參數(shù)不準確等情況下具有強魯棒性,是正確、有效的。
[Abstract]:In recent years, distributed optical-storage power generation systems are developing rapidly, and the ability of energy storage to track source-network side power instructions has become a hot research topic. Firstly, the affine nonlinear model of the non-isolated bidirectional DC-DC converter in the current continuous mode is established, and the nonlinear state space description under the large signal modeling is obtained by introducing the voltage tracking parameters. According to the linearization condition of state feedback, the virtual output is established. The nonlinear transformation is used to map the nonlinear space to the linear space. The influence of the parameters of the second order classical control system in the linear space on the performance of the system is analyzed, and the state feedback coefficient is calculated. Finally, through digital simulation and experiments, it is proved that the proposed control method can accurately and quickly realize the power command tracking function, and has strong robustness under the condition of voltage disturbance, load mutation and system parameter inaccuracy. It is correct and effective.
【作者單位】: 北京航空航天大學自動化科學與電氣工程學院;國網北京昌平供電公司;
【基金】:國家自然科學基金項目(51377007) 高等學校博士學科點專項科研基金(20131102130006) 中央高校基本科研業(yè)務費專項資金資助
【分類號】:TM46;TM61
[Abstract]:In recent years, distributed optical-storage power generation systems are developing rapidly, and the ability of energy storage to track source-network side power instructions has become a hot research topic. Firstly, the affine nonlinear model of the non-isolated bidirectional DC-DC converter in the current continuous mode is established, and the nonlinear state space description under the large signal modeling is obtained by introducing the voltage tracking parameters. According to the linearization condition of state feedback, the virtual output is established. The nonlinear transformation is used to map the nonlinear space to the linear space. The influence of the parameters of the second order classical control system in the linear space on the performance of the system is analyzed, and the state feedback coefficient is calculated. Finally, through digital simulation and experiments, it is proved that the proposed control method can accurately and quickly realize the power command tracking function, and has strong robustness under the condition of voltage disturbance, load mutation and system parameter inaccuracy. It is correct and effective.
【作者單位】: 北京航空航天大學自動化科學與電氣工程學院;國網北京昌平供電公司;
【基金】:國家自然科學基金項目(51377007) 高等學校博士學科點專項科研基金(20131102130006) 中央高校基本科研業(yè)務費專項資金資助
【分類號】:TM46;TM61
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