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1

Comparative study of PID controller designs for AVR using different optimization techniques

Hesham Haya, Ezzat M., Swief Rania A.

Archives of Electrical Engineering

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2021

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Vol. 70, nr 3

567--583

EN

This paper presents the optimal PID tuning study to improve the dynamic performance of an automatic voltage regulation (AVR) system. The system under study consists of a synchronous generator whose reference voltage changes in a step function and tries to overcome the transient behavior of its terminal voltage smoothly. To optimally control the performance, different optimization techniques are applied to tune the controller gains to obtain the minimum steady state error (main objective) and better dynamic characteristics (rise time, settling time, max overshoot, etc.). Then the AVR system responses with a PID controller based on different optimization techniques are compared to find out which is the best technique.

2

An investigation of abrasive and erosion behaviour of AA 2618 reinforced with Si3N4, AlN and ZrB2 in situ composites by using optimization techniques

Selvaraj S. K., Nagarajan M. K., Kumaraswamidhas L. A.

Archives of Civil and Mechanical Engineering

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2017

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Vol. 17, no. 1

43--54

EN

AA 2618 alloy matrix material is mixed with silicon nitride (Si3N4), aluminium nitride (AlN), and zirconium boride (ZrB2) reinforcement particles. AA 2618 composites were prepared by stir casting method by the following various amounts of weight percentage (wt%): about 0, 2, 4, 6 and 8. AA 2618 composites were analyzed by various mechanical properties such as micro-hardness, tensile strength, and compressive strength. The mechanical properties were increased by increasing wt% of reinforcements. The microstructure and worn surfaces’ analysis have been done for the dispersion and bonding structure of the reinforced particles in composites; also, the AA 2618 composites were involved with different characterizations such as abrasive and erosion wear tests at various wt% to find the wear resistance of the composites. The mass loss was considered as the result of wear testing. Before and after worn surface has been analyzed by scanning electron microscope (SEM), the abrasive and erosion wear test results were analyzed by using traditional and nontraditional techniques like Taguchi method, analysis of variance (ANOVA) and genetic algorithm (GA) to obtain the better wear resistance of various wt% of AA 2618 composites and to study the most influencing input and output process parameters by using different optimization techniques.

3

Zastosowanie algorytmu ewolucyjnego do optymalizacji pracy urządzeń systemu elektroenergetycznego

Gajer M.

Informatyka Teoretyczna i Stosowana

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2007

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R. 7, nr 12

7-14

PL

Zaproponowano zastosowanie techniki algorytmów ewolucyjnych do sterowania pracą urządzeń wytwórczych systemu elektroenergetycznego. Rozważono zarówno metodę ekonomicznego rozdziału obciążeń pomiędzy elek-trownie cieplne, jak również podjęto próbę optymalizacji pracy elektrowni szczytowych z turbinami gazowymi, elektrowni wodnych i szczytowo-pompowych. Uzyskane rezultaty pozwalają na ekonomiczne sterowanie pracą elektrowni i mogą się przyczynić do obniżenia kosztów produkcji energii elektrycznej, ilości spalanych paliw kopalnych i emisji zanieczyszczeń do atmosfery.

EN

In the paper there was proposed to use the technique of evolutionary algorithm for the purpose of control of electroenergetic system. The evolutionary algorithm was used both for the solution of economic dispatch problem among thermal units and a1so for the purpose of controlling the work of gas turbines, hydropower plants and pumping units. The obtained results seem very interesting, because the solutions found by evolutionary algorithm are characterized by good energetic balance of the system. Also the water reservoirs are balanced at the admissible levels. Pumping water during the night at using the accumulated energy during the evening allowed reducing the global costs of electric energy production.

4

Computer modelling of intelligent comb microactuators - survey

Wiak S.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

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2005

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z. 105

123-143

EN

The paper is devoted to the complex strategy of modelling and the optimization technique, proposed by author, of intelligent micro-actuators of comb structure. This methodology is based on the lumped parameters and vector field 3-D structural models, applied to the different structure of intelligent MEMS.

PL

W pracy przedstawiono kompleksową strategię komputerowego modelowania i optymalizacji, opracowaną przez autora, inteligentnych mikroaktuatorów o konstrukcji uzębionej. Przedstawiono szerokie spektrum różnych rozwiązań konstrukcyjnych oraz zastosowań mikroaktuatorów o ruchu obrotowym oraz liniowym. Opracowana metodologia jest oparta na zintegrowanym podejściu łączącym modelowanie wektorowe dla trójwymiarowych struktur aktuatorów i opracowane modele obiektowe (modele o parametrach skupionych). Optymalizację wybranych struktur aktuatorów przeprowadzono z wykorzystaniem klasycznych metod deterministycznych oraz algorytmów genetycznych i ewolucyjnych.