Optimal 2-DOF PID controller design for load frequency control with various nonlinearities
About this article
Abstract
This article includes an efficient and effective hybrid optimization technique called as Differential Evolution - Particle Swarm Optimization (DE-PSO) is used to optimize the controller gains parameters of two-degree of freedom-proportional-integral-derivative controller (2-DOF-PID) by considering the Integral time absolute error (ITAE) in load frequency control of three area non-linear interconnected reheat thermal system. The nonlinearities of the system are implemented by generation rate constraints (GRC) in each of the control areas. The incompara-bility of the suggested method is recognized above some pre-published outputs. The domination of 2-DOF-PID controller in conditions of responses of the settling time, minimum undershoots & overshoot over other controllers is proved on the nonlinear system. For the verifica-tion of the robustness of the mentioned controller a time delay is introduced in the scrutinized system as a second source of nonlinearity.
Keywords
- 2-Degree Freedom of Proportional-Integral-Derivative Controller
- Load Frequency Control
- Differential Evolution
- Particle Swarm Optimization
- Nonlinear System.
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