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What is Cascade Controller

Chapter 3
Handbook of Research on Smart Power System Operation and Control
Cascade controller includes secondary measurement and secondary feedback arrangement that makes it more compatible to provide good set-point tracking and better disturbance rejection ability. In a cascade controller, two feedback loops are employed, and the inner loop responds much faster than the outer loop.
Published in Chapter:
Dynamic and Stability Analysis of Wind-Diesel-Generator System With Intelligent Computation Algorithm: Computation Algorithms Applied to WDG System
Dipayan Guha (Motilal Neheru National Institute of Technology Allahabad, India), Provas Kumar Roy (Kalyani Government Engineering College, India), and Subrata Banerjee (National Institute of Technology Durgapur, India)
Copyright: © 2019 |Pages: 40
DOI: 10.4018/978-1-5225-8030-0.ch003
Abstract
In this chapter, the dynamic performance of a wind-diesel-generator system has been studied against wind and load perturbations. The wind perturbation is modeled by simulating base, ramp, gust, and random wind. An optimized cascade tilt-integral-derivative (CC-TID) controller is provided to the test system for producing desired control signal to regulate the blade pitch angle of wind turbine. To confirm the efficacy of CC-TID controller, the output results are compared to that of PI- and PID-controller. The optimum gains of the proposed controllers are explored employing Levy-embedded grey wolf optimization, whale optimization algorithm, drone squadron optimization, and search group algorithm. To show the effectiveness, the output results are compared to the results of genetic algorithm and particle swarm optimization tuned controllers. A thyristor control series compensator (TCSC) is provided to WDG model for increasing the damping of system oscillations. Analysis of the presented results confirm the supremacy of CC-TID-TCSC controller over other controllers provided in this chapter.
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