【摘要】：為分析計(jì)算電力電子系統(tǒng)的電磁瞬態(tài)過程,需采用非理想開關(guān)器件模型,并計(jì)及電路中的雜散參數(shù)和控制回路中的時(shí)間延遲等,此時(shí)描述電力電子系統(tǒng)的數(shù)學(xué)模型呈現(xiàn)出高階非線性特性,且往往具有較強(qiáng)的剛性。采用常規(guī)微分方程的數(shù)值解算方法對于這種非線性的電力電子系統(tǒng)瞬態(tài)過程進(jìn)行仿真求解,存在仿真時(shí)間超長和數(shù)值穩(wěn)定性很差的問題。為解決這一問題,基于離散狀態(tài)事件驅(qū)動(dòng)(DSED)思想提出一類電力電子瞬態(tài)過程數(shù)值仿真方法,摒棄對時(shí)間離散的常規(guī)數(shù)值解算,而直接以狀態(tài)量的變化值作為仿真計(jì)算依據(jù)。理論推證和仿真解算比較結(jié)果表明:該方法能有效縮短解算時(shí)間,同時(shí)解決了常微分方程組的剛性問題,使得解算具有很好的數(shù)值穩(wěn)定性。
[Abstract]:In order to analyze and calculate the electromagnetic transient process of power electronic system, the non-ideal switching device model should be adopted, and the stray parameters in the circuit and the time delay in the control circuit should be taken into account. At this time, the mathematical model of power electronic system is characterized by high order nonlinearity and strong rigidity. The numerical solution method of ordinary differential equation is used to solve the transient process of this nonlinear power electronic system, which has the problems of long simulation time and poor numerical stability. In order to solve this problem, a kind of power electronic transient process numerical simulation method based on discrete state event-driven (DSED) is proposed. The conventional numerical solution of discrete time is abandoned, and the change of state is directly used as the basis of simulation calculation. The results of theoretical deduction and simulation show that this method can effectively shorten the solving time and solve the rigid problem of ordinary differential equations, which makes the solution has good numerical stability.
【作者單位】： 清華大學(xué)電機(jī)系電力系統(tǒng)及發(fā)電設(shè)備安全控制和仿真國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金重大項(xiàng)目資助(51490680,51490683)
【分類號】：TM743

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