基于最优比例积分的电力弹簧控制器设计与应用

发布时间：2018-03-01 04:30

本文关键词： 电力弹簧最优PI控制模糊PI控制无功补偿微电网　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：电力弹簧(Electric Spring,ES)是一种分布式电压调节器,能有效缓解分布式发电系统中出现的电力波动问题。但是在现有控制器调节下易引入谐波,且响应时间较长,严重影响了电力弹簧的调节效果。针对比例积分和比例谐振控制器应用于ES这个非线性复杂系统上稳定性和鲁棒性较差的特点,本文应用改进的单纯型加速算法(simplexmethod,SPX),以时间乘以误差平方积分准则作为寻优目标函数,对PI控制器的参数进行实时调整、寻优,使ES的动态响应效果达到最佳。本文在阅读大量参考文献后,对电力弹簧的模型和工作特性进行研究。在这个基础上探讨了现有电力弹簧控制器的设计及不足之处,并在Matlab/Simulink环境中对电力弹簧的PR控制器进行仿真,发现传统控制器响应慢、稳定性差的问题。考虑到电力弹簧属于分布式电压调节器,需要较强适应性和鲁棒性,本文设计了基于最优比例积分的电力弹簧控制器。为了对比其控制效果,还设计了同样具有良好静态和动态性能的模糊PI控制器。仿真和对比结果表明最优比例积分控制器效果更佳。最后,为了验证基于最优比例积分控制器的电力弹簧能适用于新能源发电系统,在Matlab/Simulink环境下搭建了光伏并网模型。仿真结果验证电力弹簧在光伏发电系统中具有良好的静态和动态性能,能缓解新能源发电系统中出现的电力波动问题。
[Abstract]:Power spring spring spring ESs is a kind of distributed voltage regulator, which can effectively alleviate the problem of power fluctuation in distributed generation system, but it is easy to introduce harmonics under the regulation of the existing controller, and the response time is longer. The regulation effect of power spring is seriously affected. In view of the poor stability and robustness of the proportional integral and proportional resonance controller applied to the nonlinear complex system es, In this paper, the improved simplex acceleration algorithm is used to optimize the parameters of Pi controller by using the time multiplied error squared integral criterion as the optimization objective function. The dynamic response of es is optimized. After reading a large number of references, this paper studies the model and working characteristics of power spring. On this basis, the design and shortcomings of the existing power spring controller are discussed. The PR controller of power spring is simulated in Matlab/Simulink environment. It is found that the traditional controller is slow in response and poor in stability. Considering that power spring is a distributed voltage regulator, it needs strong adaptability and robustness. In this paper, a power spring controller based on optimal proportional integral is designed. A fuzzy Pi controller with good static and dynamic performance is also designed. The simulation and comparison results show that the optimal proportional integral controller is more effective. Finally, In order to verify that the power spring based on the optimal proportional integral controller is applicable to the new energy generation system, A grid-connected photovoltaic model is built in the Matlab/Simulink environment. The simulation results show that the power spring has good static and dynamic performance in photovoltaic power generation system and can alleviate the power fluctuation problem in the new energy generation system.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM761.12

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