【摘要】：系統(tǒng)級仿真中如何對電力電子接口電源降階建模并分析其暫態(tài)穩(wěn)定性成為新能源并網(wǎng)研究中亟待解決的難題。該文以蓄電池儲能系統(tǒng)BESS為研究對象,根據(jù)電力電子接口特有的機電解耦原理解釋這一類電源的準功率特性,并基于奇異攝動理論分析電源內部的精細時間尺度結構。據(jù)此,該文建立適應不同復雜度、精度要求的微分代數(shù)方程DAE降階模型體系。在不同網(wǎng)側外部擾動及電源內部參數(shù)配置的條件下驗證降階模型體系的有效性。模型可揭示具有準功率特性電源的暫態(tài)失穩(wěn)模式,并保持電源外特性的模擬精度,計算出的暫態(tài)失穩(wěn)臨界指標滿足實際需求。
[Abstract]:How to model power electronic interface power supply and analyze its transient stability in system-level simulation has become a difficult problem to be solved in the research of new energy grid connection. In this paper, the quasi-power characteristic of the battery energy storage system (BESS) is explained according to the electromechanical decoupling principle of the power electronic interface, and the fine time scale structure of the power supply is analyzed based on the singular perturbation theory. Based on this, a DAE reduced order model system for differential algebraic equations with different complexity and accuracy is established. The effectiveness of the reduced order model is verified under the conditions of different external disturbances on the grid side and the configuration of the internal parameters of the power supply. The model can reveal the transient instability mode of the power supply with quasi-power characteristics and maintain the simulation accuracy of the external characteristics of the power supply. The calculated critical index of transient instability can meet the actual needs.
【作者單位】： 電力系統(tǒng)及發(fā)電設備控制和仿真國家重點實驗室(清華大學電機系);中國電力科學研究院;ABB(中國)有限公司;
【基金】：國家電網(wǎng)公司科技項目(XTB17201500037)~~
【分類號】：TM743;TM912

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