Design of MMC passive controller based on EL model
-
摘要: 建立了基于开关状态函数的MMC电磁暂态数学模型,设计了改进的基于EL模型的MMC无源控制器。该控制器采用误差控制方式,即通过控制误差为零使得MCC控制系统实际输出的物理量跟踪参考给定值;为使误差能量快速衰减为零,加快耗散特性,引入了阻尼矩阵;为消除稳态残差电压,将MMC直流电压引入控制系统,与参考电压相比较,经PI调节后与参考有功分量相加得到最终的有功参考分量。仿真结果表明,该控制器能够完全跟踪参考给定值,同时能降低电压波动范围,具有较好的动态响应特性。Abstract: An electromagnetic transient mathematical model of MMC based on switch state function was built and an improved MMC passive controller based on EL model was designed. The controller adopts error control method, namely using zero control error to make actual output track given reference value of MMC control system. In order to make error energy decay to zero rapidly and speed up dissipative characteristics, the damping matrix was introduced; To eliminate steady state residual voltage, MMC DC voltage was introduced to control system, and compared with reference direct voltage, the voltage is regulated by PI control and is added to active current reference component to get ultimate active current reference component. The simulation results show that the controller can completely track reference value, reduce voltage fluctuation range, and has good dynamic response.
点击查看大图
计量
- 文章访问数: 72
- HTML全文浏览量: 6
- PDF下载量: 3
- 被引次数: 0