基于离散状态事件驱动的电力电子瞬态过程仿真方法
发布时间：2018-12-27 12:53
【摘要】：为分析计算电力电子系统的电磁瞬态过程,需采用非理想开关器件模型,并计及电路中的杂散参数和控制回路中的时间延迟等,此时描述电力电子系统的数学模型呈现出高阶非线性特性,且往往具有较强的刚性。采用常规微分方程的数值解算方法对于这种非线性的电力电子系统瞬态过程进行仿真求解,存在仿真时间超长和数值稳定性很差的问题。为解决这一问题,基于离散状态事件驱动(DSED)思想提出一类电力电子瞬态过程数值仿真方法,摒弃对时间离散的常规数值解算,而直接以状态量的变化值作为仿真计算依据。理论推证和仿真解算比较结果表明:该方法能有效缩短解算时间,同时解决了常微分方程组的刚性问题,使得解算具有很好的数值稳定性。
[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.
【作者单位】： 清华大学电机系电力系统及发电设备安全控制和仿真国家重点实验室;
【基金】：国家自然科学基金重大项目资助(51490680,51490683)
【分类号】：TM743
[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.
【作者单位】： 清华大学电机系电力系统及发电设备安全控制和仿真国家重点实验室;
【基金】：国家自然科学基金重大项目资助(51490680,51490683)
【分类号】：TM743
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