采用多DSP的级联型DSTATCOM分散控制策略  

Distributed Control Strategy of Cascaded DSTATCOM Using Multi-DSPs

作　　者：戴珂[1] 陈晶晶[1] 宫力[1] 陈睿[1] 黄云辉[1] 康勇[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074

出　　处：《高电压技术》2010年第11期2821-2826,共6页High Voltage Engineering

基　　金：台达2010电力电子科教发展计划项目(DREG2010009)~~

摘　　要：针对配电网级联型静止无功补偿器(DSTATCOM),提出了采用多数字信号处理器(DSP)的分散控制策略。该控制策略采用中央控制器和单链节控制器相结合的多DSP硬件结构。中央控制器用于实现电压、电流双闭环上层控制算法,单链节控制器用于实现各链节的直流电容电压均衡控制并产生脉冲宽度调制(PWM)信号。采用这种分散控制策略,可以充分发挥中央控制器和单链节控制器的作用,大大简化控制系统的软、硬件设计。仿真和实验结果表明,采用基于分散控制策略的DSTATCOM控制系统,能够使DSTATCOM快速精准地跟踪直流电容电压和输出电流指令,输出电流总谐波畸变率(THD)小于3%,同时可获得很好的链节直流电容均压效果。For cascaded DSTATCOM based on DSP,we put forward a novel distributed control strategy.This control strategy employs a hardware structure with multi-DSP： the master control DSP implements voltage and current control scheme,while the slave control DSP realizes balancing control of DC capacitor voltage of each chain and generates PWM signals.We also put forward a design method of software and hardware of the distributed control system.The proposed control strategy not only simplifies the software and hardware design of control system but also makes it easier to carry out modularization of cascaded DSTATCOM.Simulation and experimental results from a 3 chains prototype demonstrate the effectiveness and feasibility of the proposed distributed control strategy： both DC voltage reference and output current reference can be traced fast and accurately by the DSTATCOM,and the total harmonics distortion of output current is less than 3%.

关 键 词：数字信号处理器 配电网静止无功补偿器 级联 分散控制 直接电流控制 直流电容电压均衡控制 

分 类 号：TM761.12[电气工程—电力系统及自动化]