配电网电压源变换器事件驱动控制策略研究  

Study on event-triggered control method of voltage source converter in distribution network

作　　者：郭楚佳[1] 张莹[1] 张芳[1] GUO Chu-jia;ZHANG Ying;ZHANG Fang(School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi′an 710021, China)

机构地区：[1]陕西科技大学电气与控制工程学院,陕西西安710021

出　　处：《陕西科技大学学报》2021年第4期142-147,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(62003201);陕西科技大学自然科学预研基金项目(2020BJ-10);陕西省教育厅专项科研计划项目(21JK0543)。

摘　　要：配电网复杂环境下多变换器协同控制时,变换器之间必然存在计算延时、通信延时,极大的影响了控制性能和系统稳定性.针对这一问题,突破时间驱动控制的局限,为三相两电平电压源变换器设计事件驱动自适应反步控制策略.首先,针对含LCL滤波的三相两电平电压源变换器系统,建立包含系统扰动参数的系统模型,以提高控制算法自适应性能;其次,将该高阶系统划分为三个子系统,以递推的思路设计反步控制律;最后,针对变换器系统设计事件驱动机制,并设计事件驱动控制律.仿真结果表明,所提方法与传统静态解耦控制方法相比动态性能有较大提高,与时间驱动反步控制方法相比较,动态性能基本一致时,控制律更新计算次数减少50%以上.The delay caused by calculation and communication is a big challenge of the cooperated control of multi-converter in distribution network,which will deteriorate the control performance and system stability.Focus on this problem,an event-triggered method is proposed in this paper.Firstly,the mathematical model of the three-phase two level voltage converter with LCL filter is established,the parameter of system disturbance is designed to increase the adaptive performance;secondly,the whole system is divided into three sub-systems,and the control law is designed by using the backstepping algorithm;finally,according to the designed event-triggered mechanism,the event-triggered control law is designed.The simulation results indicate that comparing with the static decoupling control,the proposed method shows better dynamic performance,and comparing with the time-triggered backstepping control method,the times of control law update and communication of the proposed method is decreased 50%,while shows same dynamic performance.

关 键 词：配电网 电压源变换器 事件驱动 反步控制 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]