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Improved Design of Interval Type-2 Fuzzy based Wide Area Power System Stabilizer for Inter-area Oscillation Damping

机译：区间型2模糊基基广域电力系统稳定器的改进设计

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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.
机译：电力系统互连由于电力需求的不断增加导致区域间振荡作为电力系统稳定性的挑战。本文提出了间隔类型-2模糊基的广域电力系统稳定器的新颖设计，用于抑制振动区间振动模式，以提高电力系统稳定性。用于连续监测电网的广域测量系统的使用在维持电网的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。可控性索引计算执行最受影响的广域信号的选择。参与因素用于识别控制器的位置。在控制器中引入了滑动表面方法，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。间隔类型-2模糊控制是一种无模型方法，具有更好的控制性能，因为其较高的间隔类型-2模糊集自由度。最后，滑动表面参数的最佳调整已被认为是使用实际编码的遗传算法最小化积分时间方误差的优化问题，以增强阻尼控制。建议的模糊控制器已在两个区域，四台机器，11个总线IEEE基准系统中进行了测试。从模拟响应和与不同控制器的比较，所提出的控制器显示了具有更准确的动态响应和在不同系统操作条件下的区域间振荡的更好的动态响应和更好地阻尼的鲁棒性和有效性。

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