航空蓄电池放电控制方法的优化

Optimization of discharge control method for aviation battery

为减小航空蓄电池放电系统启动时的超调量与提高放电系统的抗干扰性能,提出了基于模型预测控制的航空蓄电池放电方法。以预测电流内环取代需要经PI补偿的平均电流内环,通过求目标函数的最小值确定开关管最优的操作序列实现蓄电池放电,在Matlab/Simulink中建立了两种控制方式下的放电仿真模型。结果表明,该方法与传统的平均电流控制下的蓄电池放电相比,可以解决蓄电池放电启动时超调量大和放电系统抗扰动能力差的问题,保证供给负载的电压和电流稳定。该方法能够提高航空蓄电池放电系统的鲁棒性。

This paper proposes a discharge method which is based on model predictive control and is designed to reduce the overshoot and improve the anti-interference performance of the discharge system.This method works by replacing the average current inner loop which needs to be compensated by PI with the prediction current inner loop;determining the optimal operation sequence of the switch tube by the minimum value of the objective function to realize the battery discharge;and developing the discharge simulation models under two control modes in Matlab/Simulink.The results show that,compared with the traditional average current controlled battery discharge,the method capable of eliminating large overshoot and poor anti disturbance ability of the discharge system can ensure the stability of voltage and current supply load.The method promises an improved robustness of aviation battery discharge system.