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Design of Robust Feedback Controller for a UPS System in Industrial Application

机译:工业应用中UPS系统的鲁棒反馈控制器设计

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This paper presents a novel Sliding Mode Control (SMC) approach for a three phase AC/DC/AC Voltage source UPS used in Industrial applications. The proposed controller is robust for sudden change in loads and more efficient. Most of the industries run with critical loads, so there is always a need to supply better quality of inverter output voltage waveform. A mathematical model of the system is derived using state space modeling. Using the model, a design procedure of controller implementation using the state variables necessary to obtain a stable system is developed. It can be operated for both linear and non-linear load conditions very effectively. It reduces steady state error and is easy to implement. Load voltage regulation is also found to be within the standards. The dynamic nature of the controller is verified. A phase trajectory is plotted to show the nature of the SMC characteristic in reaching the origin. Frequency response characteristics are plotted to realize the state variables to obtain stability. The simulation work is performed in PSCAD/EMTDC version 4.6. and the system stability condition is analyzed from frequency response plots obtained in MATLAB R2012b platform. The proposed controller can be effectively used in all high power industrial applications.
机译:本文为工业应用中的三相AC / DC / AC电压源UPS提供了一种新颖的滑模控制(SMC)方法。所提出的控制器对于负载的突然变化具有鲁棒性,并且效率更高。大多数行业在临界负载下运行,因此始终需要提供质量更好的逆变器输出电压波形。使用状态空间建模导出系统的数学模型。使用该模型,开发了使用获得稳定系统所需的状态变量的控制器实现的设计过程。它可以非常有效地在线性和非线性负载条件下运行。它减少了稳态误差,易于实现。负载电压调节也被发现在标准之内。验证了控制器的动态特性。绘制了相位轨迹以显示SMC特性到达原点的性质。绘制频率响应特性以实现状态变量以获得稳定性。仿真工作在PSCAD / EMTDC 4.6版中执行。从MATLAB R2012b平台获得的频率响应图分析了系统的稳定性条件。所提出的控制器可以有效地用于所有大功率工业应用。

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