针对传统的补偿控制策略存在相位失真、有功功率消耗大的问题,提出一种优化补偿控制策略.该策略通过注入动态电压恢复器(dynamic voltage restorer,DVR)有功功率的大小来优化直流侧电压的调节量,并对优化补偿策略的补偿特性进行系统分析...针对传统的补偿控制策略存在相位失真、有功功率消耗大的问题,提出一种优化补偿控制策略.该策略通过注入动态电压恢复器(dynamic voltage restorer,DVR)有功功率的大小来优化直流侧电压的调节量,并对优化补偿策略的补偿特性进行系统分析;针对逆变单元输出受到非线性和冲击性负载扰动的问题,建立了一种混合级联H桥多电平逆变拓扑,分析其结构及工作原理,完成了多电平DVR数字系统的设计,包括软硬件的设计.在Chroma6590可编程交流电源上模拟电网电压,并在该系统上进行并网补偿试验.仿真与试验结果表明,所设计的DVR系统补偿效果很好,能够实现装置输出有功功率最小并延长补偿时间,有效减少输出谐波.展开更多
The objective of this research is to realize a composite nonlinear feedback control approach for a class of linear and nonlinear systems with parallel-distributed compensation along with sliding mode control technique...The objective of this research is to realize a composite nonlinear feedback control approach for a class of linear and nonlinear systems with parallel-distributed compensation along with sliding mode control technique.The proposed composite nonlinear feedback control approach consists of two parts.In a word,the first part provides the stability of the closed-loop system and the fast convergence response,as long as the second one improves transient response.In this research,the genetic algorithm in line with the fuzzy logic is designed to calculate constant controller coefficients and optimize the control effort.The effectiveness of the proposed design is demonstrated by servo position control system and inverted pendulum system with DC motor simulation results.展开更多
文摘针对传统的补偿控制策略存在相位失真、有功功率消耗大的问题,提出一种优化补偿控制策略.该策略通过注入动态电压恢复器(dynamic voltage restorer,DVR)有功功率的大小来优化直流侧电压的调节量,并对优化补偿策略的补偿特性进行系统分析;针对逆变单元输出受到非线性和冲击性负载扰动的问题,建立了一种混合级联H桥多电平逆变拓扑,分析其结构及工作原理,完成了多电平DVR数字系统的设计,包括软硬件的设计.在Chroma6590可编程交流电源上模拟电网电压,并在该系统上进行并网补偿试验.仿真与试验结果表明,所设计的DVR系统补偿效果很好,能够实现装置输出有功功率最小并延长补偿时间,有效减少输出谐波.
文摘The objective of this research is to realize a composite nonlinear feedback control approach for a class of linear and nonlinear systems with parallel-distributed compensation along with sliding mode control technique.The proposed composite nonlinear feedback control approach consists of two parts.In a word,the first part provides the stability of the closed-loop system and the fast convergence response,as long as the second one improves transient response.In this research,the genetic algorithm in line with the fuzzy logic is designed to calculate constant controller coefficients and optimize the control effort.The effectiveness of the proposed design is demonstrated by servo position control system and inverted pendulum system with DC motor simulation results.
