The interconnection of power system due to the ever-time increase in power demand has caused inter-area oscillations as a challenge to power system stability. The present paper proposes the novel design of an Interval Type-2 Fuzzy based Wide Area Power System Stabilizer to damp the inter-area mode of oscillations for improving the power system stability. The usage of Wide Area Measurement Systems for continuous monitoring of the power grid plays a significant role in maintaining the stability of the power grid. The proposed controller uses wide-area signals from WAMS as the input signals. The controllability index calculation performs the selection of the most affected wide-area signals. The participation factor is used to identify the location of the controller. Sliding Surface approach is introduced in the controller to upgrade the performance of the controller during different operating conditions. The sliding surface approach has made the system insensitive to the parameter variations. The interval type-2 fuzzy control is a model-free approach with better control performance, due to its higher degree of freedom of interval type-2 fuzzy sets. Finally, the optimal tuning of sliding surface parameters has been considered as an optimization problem with the minimization of Integral Time Square Error using Real Coded Genetic Algorithm to enhance the damping control. The proposed Fuzzy controller has been tested in two area, four machine, 11 bus IEEE benchmark system. From the simulation responses and the comparison with different controllers, the proposed controller shows robustness and effectiveness with more accurate dynamic response and better damping of inter-area oscillations under different system operating conditions and load perturbations.

由于电力需求的不断增长而导致的电力系统互连已引起区域间振荡，这是对电力系统稳定性的挑战。本文提出了一种基于区间2型模糊的广域电力系统稳定器的新颖设计，以抑制区域间振荡模式，从而提高电力系统的稳定性。使用广域测量系统对电网进行连续监控在维护电网稳定性方面起着重要作用。所提出的控制器使用来自WAMS的广域信号作为输入信号。可控性指标计算执行对受影响最大的广域信号的选择。参与因子用于标识控制器的位置。在控制器中引入了滑动面方法，以在不同的操作条件下升级控制器的性能。滑动表面方法使系统对参数变化不敏感。区间2型模糊控制是一种无模型方法，由于其区间2型模糊集的自由度较高，因此具有更好的控制性能。最后，通过使用实数编码遗传算法来增强阻尼控制，最小化积分时间平方误差已被认为是优化滑动表面参数的优化问题。所提出的模糊控制器已在两个区域，四台机器，11总线IEEE基准系统中进行了测试。从仿真响应以及与不同控制器的比较，