I&I镇定控制的SVC自适应控制方法

Adaptive control method for SVC based on I&I stabilization

针对装设静止无功补偿器(SVC)的单机无穷大(SMIB)电力输电系统的暂态稳定性,给出一种SVC自适应控制方法.首先,构造一个二阶的目标系统,然后通过状态变量之间的映射将被控系统动态特性渐近"浸入"到目标系统中,使其具有与目标系统相同的稳定性特性,最后,通过引入基于自适应滑模观测器的直接参数辨识方法,为系统中阻尼系数设计自适应律.该方法对系统模型不做任何线性化处理,完整保留了系统的非线性特性.仿真结果表明,所设计的SVC自适应控制方法可以有效提高所连输电系统的暂态响应性能.

T he transient stability of a single‐machine‐infinite‐bus pow er transmission system with Static Var Compensator is enhanced by designing SVC adaptive controller .Firstly ,a de‐duced‐order target system is defined and then the dynamics of the controlled system will be“immersed”into it through the mapping between the state‐space variables .Thus the controlled system will have the same stability property as the target system .Finally ,the proposed SVC adaptive controller is made by designing adaptive update law s for the damping coefficient based on adaptive sliding‐mode observer . T he nonlinear property is reserved w ell because the pro‐posed method does not linearize the original model .The simulation results demonstrate that the proposed SVC adaptive controller can enhance the transient responses of the transmission sys‐tem effectively .