基于指数积分算法的微型燃气轮机系统仿真

Simulation of a microturbine system based on exponential integral algorithm

针对微型燃气轮机发电系统中既有微型燃气轮机、同步电机等具有较大时间常数的旋转设备,又有响应快速的电力电子变流器及相应的控制器,存在显著刚性,其仿真算法在数值稳定性和计算效率方面需要满足更高的要求这一问题,该文研究了一种基于指数积分算法的微型燃气轮机发电系统仿真方法,利用指数积分良好的数值性能,构造出可用于仿真计算的指数欧拉公式,可以在较大的积分步长下维持数值稳定。以孤岛运行微型燃气轮机发电系统为例,通过与Simulink平台下的小步长仿真数据进行对比,验证了所提出仿真方法的正确性和有效性。

There are rotating equipment with a large time constant, like microturbine and synchronous motor in microturbine power generation system. And the system also has power electronic converters and corresponding controller which have fast response. That is, microturbine power generation system is a multi-time-scale system, it has significant rigidity. Thus, the algorithm needs to meet the higher requirements in terms of numerical stability and computational efficiency. To solve this problem, an exponential integral method based on exponential integral method is proposed to simulate the microturbine power generation system in this paper. The exponential Euler formula can be constructed by using the exponential integral good numerical performance, which can be used to maintain the numerical stability under large integration steps. The simulation results are compared with those of the simulations in smaller time steps on the Simulink platform. The simulation results show that the method is feasible and effective.