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(xué)與工程Vol.24, No.92008年11月Electric Power Science and Engineering 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(xué)與工程202008年電流環(huán)結(jié)構(gòu)如圖2所示。 1.1.1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) pwm /3pwm（3） 電流內(nèi)環(huán)閉環(huán)傳遞函數(shù)為 =1 pwmpwm

2、 =1/ +12 將 =pwm+12+1 /15pwm /112.5pwm(6 1.1.3二階系統(tǒng)設(shè)計 將傳遞模型中的慣性環(huán)節(jié)的分母1.5+1 ÈŶ¯£¬µçÁ÷»·±Õ»·´«µÝº¯ÊýΪ = + pwmpwm+，2=解得=pwmpwm（8）由控制系統(tǒng)可知：二階系統(tǒng)無阻尼（）。二階系統(tǒng)超調(diào)量=0.707，此時上升時間4.44/5.

3、66/=0.75+1+1=2/5+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dc*+10.75圖3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 =1.33×10pwm=1，而電流環(huán)閉環(huán)傳遞函數(shù)為 = + 2+1.5+2+擾動輸入圖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(xué)與工程222008年2.2電壓環(huán) 將實際參數(shù)6 (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

4、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)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(xué)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(xué)學(xué)

5、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(xué)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 . 中國電機工程學(xué)報, 2006,26(23 :42-48. 7Boon-Teck Ooi, Xiao Wang. Boost type PWM HVDC trans-mission system J . IEEE T

6、ransactions on Power Delivery, I99I, 6(f ：I557-I563.8Boon-Teck Ooi, Xiao Wang. V oltage angle lock loop controlof the boost type PWM converter for HVDC application J . IEEE Transactions 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 圖圖12系統(tǒng)電壓、電流、直流電壓的波形響應(yīng)輸出HVDC 系統(tǒng)仿真

7、研究J . 電網(wǎng)技術(shù), 2005,29(8 :45-50.（責(zé)任編輯：馬坤英）PI Regulator and Parameter Design of V oltage PWM RectifierMing Zhanqi, Shi Xinchun, Zhou Guoliang(School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China Abstract:PWM rectifier adopts direct current control

8、 strategy and dual closed loop structure. Decoupled control structure consisting of current feedback and voltage feed-forward 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

9、 stable. With the structure of the PWM rectifier and its mathematical model which achieved under rotated coordinates after 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

10、 methods were analyzed according the stability of the system. Matlab simulation results proved the validity of the design 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頁）Steady State Performa

11、nce Investigation and Simulation of SSSC and TCSCZheng Zhenhua 1, Sun Wanshui 2, Li Dongmei 2(1. School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China; 2. Henan Zhengyang Power Supply Bureau, Zhumadian 463600, China Abstract:Thyristor Controlle

12、d Series Compensator (TCSC and the Static Synchronous Series Compensator (SSSC belong to the series compensation components 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 whic