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access icon free Novel application of integral-tilt-derivative controller for performance evaluation of load frequency control of interconnected power system

© The Institution of Engineering and Technology
Received 23/02/2018, Accepted 11/05/2018, Revised 25/04/2018, Published 17/05/2018

The primary aim of load frequency control (LFC) is to provide a good quality of electrical power to the consumers within a prescribed limit of frequency and scheduled tie-line power deviation. To achieve this objective, LFC needs highly efficient and intelligent control mechanism. Subsequently, here, a novel integral-tilt-derivative (I-TD) controller, fine-tuned by a powerful heuristic optimisation technique [called as water cycle algorithm (WCA)], is proposed for the LFC study of a two-area interconnected thermal-hydro-nuclear generating units. The studied system involves non-linearities like generation rate constraints, governor dead band, and boiler dynamics. To explore the effectiveness of the proposed controller, dynamic responses of the studied system, as obtained using I-TD controller, are compared to those yielded by other controllers such as tilt-integral-derivative and conventional proportional–integral–derivative controllers. The investigation demonstrates that the proposed I-TD controller delivers better performance in comparison to the other counterparts. Furthermore, sensitivity analysis is carried out to show robustness of the WCA tuned proposed I-TD controller by varying system parameters and loading condition. It is perceived that the proposed I-TD controller is robust and offers better transient response under varying operating conditions.

Inspec keywords: nuclear power stations; power supply quality; power system interconnection; thermal power stations; hydrothermal power systems; frequency control; intelligent control; load regulation; power generation control; optimisation; sensitivity analysis

Other keywords: loading condition; two-area interconnected thermal-hydro-nuclear generating units; integral-tilt-derivative controller; boiler dynamics; performance evaluation; I-TD controller; tilt-integral-derivative controllers; dynamic responses; transient response; scheduled tie-line power deviation; generation rate constraints; heuristic optimisation technique; load frequency control; governor dead band; sensitivity analysis; intelligent control mechanism; LFC; electrical power quality; WCA; system parameters; water cycle algorithm; interconnected power system; proportional-integral-derivative controllers

Subjects: Optimisation techniques; Optimisation techniques; Control of electric power systems; Frequency control; Power system management, operation and economics; Hydroelectric power stations and plants; Power supply quality and harmonics; Thermal power stations and plants; Power system control; Nuclear power stations and plants

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