電壓型PWM整流器比例_積分控制器的參數(shù)設(shè)計.

1、第24卷第9期電力科學與工程 Vol.24, No.92008年11月Electric PowerScie nee and Engin eeri ng Nov., 200819收稿日期：200707.電壓型PWM整流器比例=+dcdcrefqref脈沖生成外環(huán)電壓環(huán)圖1PWM整流器控制結(jié)構(gòu)圖電力科學與工程202008年電流環(huán)結(jié)構(gòu)如圖2所示X 4I 溜圖岡I1.1.1典型一型系統(tǒng)設(shè)計(1)按典型一型系統(tǒng)設(shè)計電流調(diào)節(jié)器，典型一型系統(tǒng)的開環(huán)傳遞函數(shù)一般形式為。不考慮pwm/1.5+1（ 2）由典型一型系統(tǒng)整定關(guān)系式,當取阻尼系數(shù)/3pwm /3pwm(3)電流內(nèi)環(huán)閉環(huán)傳遞函數(shù)為pwmpwm=1/+1

2、2將pwm+12/15pwm/112.5pwm(61.1.3二階系統(tǒng)設(shè)計將傳遞模型中的慣性環(huán)節(jié)的分母1.5+1e?垃卩?a? -? ; ?pYoey?apwmpwm+解得pwmpwm(8)由控制系統(tǒng)可知：二階系統(tǒng)無阻尼(VI)。二階系統(tǒng)超調(diào)量=0.707，此時上升時間4.44/5.66/0.75+1+12/5+3(10若電壓采樣頻率等于PWM開關(guān)頻率的1/3，則圖2電流環(huán)等值方框圖de+10.75電壓環(huán)簡化結(jié)構(gòu)圖明戰(zhàn)起，等電壓型PWM整流器比例0.75 +0.753+0.75=1.33 X0pwm=1,而電流環(huán)閉環(huán)傳遞函數(shù)為+1.5+2+擾動輸入0.100.0040.0120.0080.50.

3、1圖8按第3種方案設(shè)計時的階越響應(yīng)0.60.2/s響應(yīng)輸出/s響應(yīng)輸出/s響應(yīng)輸出電力科學與工程222008年2.2電壓環(huán)將實際參數(shù)（標幺值，=2.89,的階越響應(yīng)和波德圖可以看出，相角裕度為71所設(shè)計系統(tǒng)可以穩(wěn)定運行。2.3系統(tǒng)仿真圖12為PWM整流器在穩(wěn)態(tài)運行時負載變?yōu)樵瓉淼?倍時系統(tǒng)的輸出波形。0.05s就能達到新的穩(wěn)定狀態(tài)，系統(tǒng)交流電流波動較小，直流電壓最大跌落為原來的 95%。系統(tǒng)調(diào)節(jié)能力較強。3結(jié)論本文由系統(tǒng)的控制結(jié)構(gòu)簡化得到電流環(huán)、電壓環(huán)的傳遞函數(shù)，根據(jù)控制系統(tǒng)要求簡化得到PI參數(shù)計算方法。經(jīng)仿真驗證了該方法的正確性，并且在典型二型系統(tǒng)設(shè)計和二階系統(tǒng)設(shè)計方法下計算出的PI參數(shù)系統(tǒng)

4、具有較好的動態(tài)性和穩(wěn)定性。參考文獻：1 張崇魏,張興.PWM整流器及其控制M .北京：機械工業(yè)出版社,2003.2 吳鱗.自動控制原理M .北京：清華大學出版社,2006. 3趙振波,李和明. PWM整流器PI參數(shù)設(shè)計J .華北電力大學學報，2003,30(4 :34-37.4 郎永強，徐殿國.三相電壓型整流器的一種改進前饋控制策略J .電機與控制學報,2006,10(2 :160-163,170.5 沈傳文,劉瑋,路強,等.基于前饋解耦的三相PWM整流器研制J .電力電子技術(shù)，2006,40(2 :28-29,32. 6陳海榮，徐政.向無源網(wǎng)絡(luò)供電的VSC-HVDC系統(tǒng)的控制器設(shè)計J .中國

5、電機工程學報,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.,.圖 9電流,跟隨qref的波形0.5dref/圖11電壓環(huán)閉環(huán)傳遞函數(shù)bode圖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圖12系統(tǒng)電壓、電流、直流電壓的波形/s/s響應(yīng)輸出s/sHVDC系統(tǒng)仿真研究J .電網(wǎng)技術(shù),2005,29(8 :45-50.(責任編輯：馬坤英)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(qū)、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頁)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