【摘要】：將正弦幅值積分器(SAI)應(yīng)用于地鐵二重化能饋變流器,在靜止坐標(biāo)系下簡化了變流器的控制,同時提高了變流器的控制性能。從SAI的數(shù)字實現(xiàn)出發(fā),在離散域?qū)ζ溥M行頻率響應(yīng)分析,得到離散化SAI實際特性與連續(xù)域理想模型的差異,針對兩者存在的差異提出了線性預(yù)測相位補償方法。為了提高電流環(huán)的動態(tài)性能,提出在電流控制環(huán)引入虛擬解耦項,削弱電流控制對SAI的依賴,以此提高電流環(huán)的響應(yīng)速度。提出在電壓外環(huán)采用電壓平方反饋進行閉環(huán)控制方法,通過壓差修正控制保證2組串聯(lián)變流器均壓,并通過直流輸入電流比例前饋進一步提高電壓環(huán)響應(yīng)性能。仿真和實驗驗證了所提控制策略的正確性與有效性。
[Abstract]:The sinusoidal amplitude integrator (SAI) is applied to the subway duplex energy fed converter. The control of the converter is simplified in the stationary coordinate system and the control performance of the converter is improved at the same time. Based on the digital realization of SAI, the frequency response of SAI is analyzed in discrete domain, and the difference between discrete SAI and continuous ideal model is obtained. A linear predictive phase compensation method is proposed for the difference between them. In order to improve the dynamic performance of the current loop, a virtual decoupling term is introduced in the current control loop, which weakens the dependence of current control on SAI, and thus improves the response speed of the current loop. A closed loop control method using voltage square feedback in the voltage outer loop is proposed. The voltage equalization of the two series converters is guaranteed by the pressure difference correction control, and the response performance of the voltage loop is further improved by the proportional feedforward of DC input current. Simulation and experiment verify the correctness and effectiveness of the proposed control strategy.
【作者單位】： 東南大學(xué)電氣工程學(xué)院;國電南京自動化股份有限公司;
【分類號】：U231.8
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本文編號：2283515