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 PowerScie nee and Engin eeri ng 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X 4I 溜圖岡I1.1.1典型一型系统设计(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/3pwm /3pwm(3)电流内环闭环传递函数为pwmpwm=1/+1

2、2将pwm+12/15pwm/112.5pwm(61.1.3二阶系统设计将传递模型中的惯性环节的分母1.5+1e?垃卩?a? -? ; ?pYoey?apwmpwm+解得pwmpwm(8)由控制系统可知：二阶系统无阻尼(VI)。二阶系统超调量=0.707，此时上升时间4.44/5.66/0.75+1+12/5+3(10若电压采样频率等于PWM开关频率的1/3，则图2电流环等值方框图de+10.75电压环简化结构图明战起，等电压型PWM整流器比例0.75 +0.753+0.75=1.33 X0pwm=1,而电流环闭环传递函数为+1.5+2+扰动输入0.100.0040.0120.0080.50.

3、1图8按第3种方案设计时的阶越响应0.60.2/s响应输出/s响应输出/s响应输出电力科学与工程222008年2.2电压环将实际参数（标幺值，=2.89,的阶越响应和波德图可以看出，相角裕度为71所设计系统可以稳定运行。2.3系统仿真图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PI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

4、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

5、电机工程学报,2006,26(23 :42-48. 7Boon-Teck Ooi, XiaoWang. Boost type PWM HVDC tran s-missi on system J . IEEE Tran sacti ons on Power Delivery, 1991, 6(f : 1557-1563.8Bo on-Teck Ooi, Xiao Wang. V oltage an gle lock loop con trolof the boost type PWM conv erter for HVDC applicati on J . IEEE Tran sacti ons

6、 on Power Delivery, 1990,5(2 :229-235.,.图 9电流,跟随qref的波形0.5dref/图11电压环闭环传递函数bode图4 0 4 5 1 3 5102 0 2 0 0 2 1 02 0 0 1 9 00.450.500.550.450.500.550.450.5 0 0.5 5图12系统电压、电流、直流电压的波形/s/s响应输出s/sHVDC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 Desig n of V oltage PWM RectifierMing Z

7、han qi, Shi Xin chu n, Zhou Guolia ng(School of Electrical and Electronic Engineering, North China Electric PowerUni versity, Baodi ng 071003, Chi na Abstract:PWM rectifier adopts direct curre nt co ntrol strategy and dual closed loop structure. Decoupled con trol structure con sist ing of curre nt

8、feedback and voltage feed-forward is adopted in the inner curre nt con trol 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

9、 un deriMmnc3 il區、rotated coord in ates after appl ying PI regulator tran sfer fun cti ons of voltage and curre nt can be gain ed. Accord ing to the dema nd of con trol system, PI parameters were desig ned in three methods. The three methods were an alyzed accord ing the stability of the system. Mat

10、lab simulati on results proved the validity of the desig n method and the superiority to the mobility and stability of system of the second and third methods. Key words:PWM rectifier; PI regulator;decoupli ng(上接第18页)Steady State Performa nee In vestigatio n and Simulatio n of SSSC and TCSCZhe ng Zhe

11、n hua 1, Sun Wan shui 2, Li Don gmei 2(1. School of Electrical and Electro nic Engin eeri ng. North Chi na Electric Power Uni versity, Baod ing 071003, China; 2. Henan Zhen gya ng Power Supply Bureau, Zhumadia n 463600, Chi naAbstract:Thyristor Con trolled Series Compe nsator (TCSC and the Static Sy

12、nchronous Series Compe nsator (SSSC bel ong to the series compe nsati on comp onents of FACTS. SSSC is a new series compe nsati on comp onent of the FACTS family. Compared to TCSC, SSSC has faster and more flexible con trol characteristic and better effect on improvi ng the tran sie nt stability of Power System and will have a promisi ng prospect. This paper compared the structure, voltage-curre nt characteristic, power-a ngle characteristic and equivale nt impeda nee etc betwee n TCSC which is base