Load frequency control of three unit interconnected multimachine power system with PI and fuzzy controllers

2014 International Conference on Advances in Electrical Engineering (ICAEE) Pub Date : 2014-06-19 DOI:10.1109/ICAEE.2014.6838530

M. Suman, M. Rao, G. Kumar, O. Sekhar

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引用次数: 16

Abstract

The load on the power system is always varying with respect to time which results in the variation of frequency, thus leading to load frequency control problem (LFC). The variation in the frequency is highly undesirable and maximum acceptable variation in the frequency is ± 0.5Hz. In this paper load frequency control is done by PI controller, which is a conventional controller. This type of controller is slow and does not allow the controller designer to take into account possible changes in operating conditions and non-linearity's in the generator unit. In order to overcome these drawbacks a new fuzzy load frequency controller is presented to quench the deviations in the frequency and the tie line power due to different load disturbances. The effectiveness of the proposed controller is confirmed using MATLAB/SIMULINK software. The results shows that fuzzy controller provides fast response, very less undershoot and negligible peak overshoots with having small state transfer time to reach the final steady state. In this paper for single area, two area and three area the effectiveness of fuzzy controller is verified.

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用PI和模糊控制器控制三台互联多机电力系统的负荷频率

电力系统的负荷总是随时间而变化，从而导致频率的变化，从而导致负荷频率控制问题(LFC)。频率的变化是非常不希望的，频率的最大可接受变化是±0.5Hz。本文采用PI控制器对负载频率进行控制，这是一种传统的控制器。这种类型的控制器是缓慢的，不允许控制器设计者考虑到可能的变化，在运行条件和非线性的发电机组。为了克服这些缺点，提出了一种新的模糊负载频率控制器，以消除由于不同负载扰动引起的频率和线路功率的偏差。利用MATLAB/SIMULINK软件验证了该控制器的有效性。结果表明，模糊控制器响应速度快，欠调量小，峰值超调量可忽略，状态传递时间短，达到最终稳态。本文对单区、二区和三区模糊控制器的有效性进行了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2014 International Conference on Advances in Electrical Engineering (ICAEE)

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