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有源电力滤波器的比例递推积分控制   总被引:6,自引:0,他引:6       下载免费PDF全文
在采用有源电力滤波器消除谐波中,由于滤波器的检测精度、指令电流计算延时和输出滤波器的相移等因素的影响,滤波效果不是很理想.提出了应用于并联型有源滤波器的比例递推积分控制算法,比例系数和积分系数由模糊推理在线整定.该算法能有效地提高系统的动态和稳态性能,可适应于单相、三相三线制、三相四线制非线性负载电流波形畸变的抑制.实验结果证明了所提出的控制算法的有效性.  相似文献
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A flexible true plurigaussian code for spatial facies simulations   总被引:3,自引:0,他引:3  
The current forms of plurigaussian simulation have serious limitations for applications to large numbers of geological facies, or units, which have complex contact relations. In this paper the authors present a true plurigaussian simulation (PGS) method, which can be applied in a simple way to any number of geological facies by using any number of Gaussians. A recursive technique is used for multi-dimensional integration of the Gaussian functions, which forms the major part of the PGS computation. A binary, dynamic contact matrix (DCM) is used to specify the contact relations among the facies; this method has proved to be simple, flexible and capable of dealing with general, complex contact relations. A method for incorporating into PGS multivariate correlations among any number of random variables is also included. A simulated example is used to demonstrate the application of the generalised PGS. This example shows that PGS is more robust to under-sampling than traditional direct indicator simulation.  相似文献
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针对有源滤波器电流跟踪控制问题,提出了一种基于改进型单神经元参数自调整的递推积分PI控制方法;针对控制参考信号为周期量这一特征,递推积分PI控制算法,消除系统的稳态误差;采用改进型单神经元构造递推积分PI算法,利用模糊推理和自学习算法分时段在线调整控制器参数,用以提高系统的鲁棒性和自适应能力;由于采用三角波脉宽调制方式,逆变器产生的开关谐波较容易滤除;仿真实验结果证明该控制方法能有效地提高系统的目标跟随特性、抗干扰性和鲁棒性;所提出的控制算法还可以对其它周期性被控量实现无静差控制.  相似文献
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This paper presents a current control method for a shunt hybrid active power filter (HAPF) using recursive integral PI algorithm. The method improves the performance of the HAPF system by reducing the influence of detection accuracy, time delay of instruction current calculation and phase displacement of output filter. Fuzzy logic based set-point weighing algorithm is combined in the control scheme to enhance its robustness and anti-interference ability. The proposed algorithm is easy to implement for engineering applications and easy to compute. Experiment results have verified the validity of the proposed controller. Furthermore, the proposed recursive integral PI algorithm can also be applied in the control of periodic current as in AC drivers.  相似文献
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