电压型PWM整流器比例_积分控制器的参数设计

1、第24卷第9期电力科学与工程Vol.24, No.92008年11月Electric Power Science and Engineering Nov., 200819 收稿日期：200707.电压型PWM 整流器比例=+,dcdcrefqref脉冲生成外环电压环图1PWM 整流器控制结构图电力科学与工程202008年电流环结构如图2所示。 （1）按典型一型系统设计电流调节器, 典型一 型系统的开环传递函数一般形式为。不 考虑 = pwm/1.5+1（2） 由典型一型系统整定关系式，当取阻尼系数 pwm /3pwm（3） 电流内环闭环传递函数为 =1 pwmpwm =1/ +12 将 =pw

2、m+12+1 /15pwm /112.5pwm(6 将传递模型中的惯性环节的分母+1 ÈŶ¯£¬µçÁ÷»·±Õ»·´«µÝº¯ÊýΪ = + pwmpwm+，2=解得=pwmpwm（8）由控制系统可知：二阶系统无阻尼（）。二阶系统超调量，此时上升时间=+1+1=2/5+3(10若电压采样频率等于PWM 开关频率的1/3，则图2电流环

3、等值方框图dc*+1图3电压环简化结构图 明战起，等电压型PWM 整流器比例=3+ =1.33×10pwm=1，而电流环闭环传递函数为 = + 2+1.5+2+扰动输入图8按第3种方案设计时的阶越响应/s响应输出/s响应输出/s响应输出 电力科学与工程222008年 将实际参数6 (标幺值 ，=2.89，的阶越响应和波德图。 图12为PWM 整流器在稳态运行时负载变为原来的2倍时系统的输出波形。0.05s 就能达到新的稳定状态，系统交流电流波动较小，直流电压最大跌落为原来的95%。系统调节能力较强。3结论本文由系统的控制结构简化得到电流环、电压环的传递函数，根据控制系统要求简化得到P

4、I 参数计算方法。经仿真验证了该方法的正确性，并且在典型二型系统设计和二阶系统设计方法下计算出的PI 参数系统具有较好的动态性和稳定性。参考文献：1张崇魏, 张兴. PWM 整流器及其控制M . 北京：机械工业出版社, 2003.2吴鳞. 自动控制原理M . 北京：清华大学出版社, 2006. 3赵振波, 李和明. PWM 整流器PI 参数设计J . 华北电力大学学报, 2003,30(4 :34-37.4郎永强, 徐殿国. 三相电压型整流器的一种改进前馈控制策略J . 电机与控制学报, 2006,10(2 :160-163,170.5沈传文, 刘玮, 路强, 等. 基于前馈解耦的三相PWM

5、整流器研制J . 电力电子技术, 2006,40(2 :28-29,32. 6陈海荣, 徐政. 向无源网络供电的VSC-HVDC 系统的控制器设计J . 中国电机工程学报, 2006,26(23 :42-48. 7Boon-Teck Ooi, Xiao Wang. Boost type PWM HVDC trans-mission system J . IEEE Transactions on Power Delivery, I99I, 6(f ：I557-I563.8Boon-Teck Ooi, Xiao Wang. V oltage angle lock loop controlof th

6、e boost type PWM converter for HVDC application J . IEEE Transactions on Power Delivery, 1990,5(2 :229-235. , . 图9电流, 跟随qref的波形dref/图11电压环闭环传递函数bode 图图12系统电压、电流、直流电压的波形响应输出HVDC 系统仿真研究J . 电网技术, 2005,29(8 :45-50.（责任编辑：马坤英）PI Regulator and Parameter Design of V oltage PWM RectifierMing Zhanqi, Shi Xinc

7、hun, Zhou Guoliang(School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China Abstract:PWM rectifier adopts direct current control strategy and dual closed loop structure. Decoupled control structure consisting of current feedback and voltage feed-f

8、orward is adopted in the inner current control loop. PI regulator is adopted so as to track the reference current quickly. The outer voltage loop with PI regulator makes the voltage stable. With the structure of the PWM rectifier and its mathematical model which achieved under rotated coordinates af

9、ter applying PI regulator transfer functions of voltage and current can be gained. According to the demand of control system, PI parameters were designed in three methods. The three methods were analyzed according the stability of the system. Matlab simulation results proved the validity of the desi

10、gn method and the superiority to the mobility and stability of system of the second and third methods. Key words:PWM rectifier; PI regulator; decoupling（上接第18页）Steady State Performance Investigation and Simulation of SSSC and TCSCZheng Zhenhua 1, Sun Wanshui 2, Li Dongmei 2(1. School of Electrical a

11、nd Electronic Engineering, North China Electric Power University, Baoding 071003, China; 2. Henan Zhengyang Power Supply Bureau, Zhumadian 463600, China Abstract:Thyristor Controlled Series Compensator (TCSC and the Static Synchronous Series Compensator (SSSC belong to the series compensation compon

12、ents of FACTS. SSSC is a new series compensation component of the FACTS family. Compared to TCSC, SSSC has faster and more flexible control characteristic and better effect on improving the transient stability of Power System and will have a promising prospect. This paper compared the structure, voltage-current characteristic, power-angle characteristic and equivalent impedance etc between TCSC which is b