电力系统动态过程的柔性自校正仿真方法

电力系统动态过程仿真的效率和数值稳定性常常受到刚性的困扰。通过对非线性动态系统刚性特征的分析和再思考指出：刚性时空分布的局部性为柔性化提供了基础。其次，文中提出了自适应柔性分组策略和具有自校正积分措施的变量组协调策略。通过对变量组别划分、相对步长因子调整、最小积分步长调整3种自适应策略的统一处理,可以动态地控制变量组别的变化和积分步长的调整，在保证精度的前提下放开了较慢变量的步长，避免了传统方法所有变量采用相同步长进行积分导致计算效率低下的缺陷，克服了现有变量分组方法难以做到同时自适应调整多个控制参量的不足，使计算效率得到了显著提高。

Power System Dynamic Simulation with Flexible Self-adjustment Method

The efficiency and numerical stability of power system dynamic simulation are often affected by the rigidity of studied systems. It is indicated that rigidity has space-time local characteristic that offers the foundation to solve the rigidity problems by means of the analysis and re-thinking about the rigidity characteristic of dynamic processing of nonlinear system. Secondly, self-adaptive flexible grouping strategies and groups coordination strategies with flexible self-adjustment method are put forward. By unified treatments of three adaptive strategies including variables grouping, relative step factor adjustment and minimal integral step size adjustment, changing of groups and step sizes can be controlled dynamically. They magnify the step sizes of some slower variables under the allowable precision, which avoid using the same step size for all of the variables as the traditional method, and overcome the defect of the present grouping methods that are difficult to adjust adaptively multi control parameters at the same time, and then the efficiency of dynamic simulation is enhanced significantly.