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1

Barnacles mating optimizer for loss minimization of optimal reactive power dispatch

Sulaiman Mohd Herwan, Mustaffa Zuriani, Saari Mohd Mawardi, Mohamad Ahmad Johari

Przegląd Elektrotechniczny

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2022

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R. 98, nr 2

59--63

EN

A recent evolutionary optimization algorithm, Barnacles Mating Optimizer (BMO) algorithm is proposed to solve one of the optimal reactive power dispatch (ORPD) problems viz. loss minimization in power system. The concept of Hardy-Weinberg principle and sperm-cast process of barnacles is adopted in BMO to balance the exploitation and exploration in solving the optimization problem. Optimal reactive power dispatch (ORPD) on the other hand is one of the complex optimization problems in power system operation. BMO is utilized to obtain the optimal combination of control variables such as generator voltages, transformer tap setting and injected MVAR or known as reactive compensation devices to achieve the minimum losses in the power system. To show the effectiveness of proposed BMO, it is tested on IEEE-30 bus system which consists of 25 control variables and also has been tested on the large system of power network viz. IEEE-118 bus system. The obtained results from BMO are compared with other well-known optimization algorithms in the literature. The obtained comparison results indicate that proposed BMO is effective to reach minimum loss for ORPD problem.

PL

Zaproponowano najnowszy ewolucyjny algorytm optymalizacji, algorytm Barnacles Mating Optimizer (BMO), aby rozwiązać jeden z problemów z optymalnym rozprowadzaniem mocy biernej (ORPD), a mianowicie. minimalizacja strat w systemie elektroenergetycznym. Koncepcja zasady Hardy'ego-Weinberga i procesu odlewania nasienia pąkli została przyjęta w BMO w celu zrównoważenia eksploatacji i eksploracji w rozwiązaniu problemu optymalizacji. Natomiast optymalne dysponowanie mocą bierną (ORPD) jest jednym ze złożonych problemów optymalizacji pracy systemu elektroenergetycznego. BMO służy do uzyskania optymalnej kombinacji zmiennych sterujących, takich jak napięcia generatora, ustawienie zaczepów transformatora i wstrzykiwany MVAR lub znane jako urządzenia kompensacji reaktywnej, w celu osiągnięcia minimalnych strat w systemie elektroenergetycznym. Aby pokazać skuteczność proponowanego BMO, został przetestowany na systemie magistrali IEEE-30, który składa się z 25 zmiennych sterujących, a także został przetestowany na dużym systemie sieci energetycznej, a mianowicie. System magistrali IEEE118. Otrzymane wyniki z BMO są porównywane z innymi znanymi algorytmami optymalizacyjnymi w literaturze. Uzyskane wyniki porównawcze wskazują, że proponowane BMO jest skuteczne w osiąganiu minimalnych strat związanych z problemem ORPD.

2

Research on hybrid modified pathfinder algorithm for optimal reactive power dispatch

Suresh V., Senthil Kumar S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2021

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Vol. 69, nr 4

art. no. e137733

EN

Hybridization of meta-heuristic algorithms plays a major role in the optimization problem. In this paper, a new hybrid meta-heuristic algorithm called hybrid pathfinder algorithm (HPFA) is proposed to solve the optimal reactive power dispatch (ORPD) problem. The superiority of the Differential Evolution (DE) algorithm is the fast convergence speed, a mutation operator in the DE algorithm incorporates into the pathfinder algorithm (PFA). The main objective of this research is to minimize the real power losses and subject to equality and inequality constraints. The HPFA is used to find optimal control variables such as generator voltage magnitude, transformer tap settings and capacitor banks. The proposed HPFA is implemented through several simulation cases on the IEEE 118-bus system and IEEE 300-bus power system. Results show the superiority of the proposed algorithm with good quality of optimal solutions over existing optimization techniques, and hence confirm its potential to solve the ORPD problem.

3

Multi-objective optimal reactive power dispatch to maximize power system social welfare in the presence of generalized unified power flow controller

Suresh C. V., Sivanguraju S.

Archives of Electrical Engineering

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2015

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Vol. 64, nr 3

405--426

EN

In this paper a novel non-linear optimization problem is formulated to maximize the social welfare in restructured environment with generalized unified power flow controller (GUPFC). This paper presents a methodology to optimally allocate the reactive power by minimizing voltage deviation at load buses and total transmission power losses so as to maximize the social welfare. The conventional active power generation cost function is modified by combining costs of reactive power generated by the generators, shunt capacitors and total power losses to it. The formulated objectives are optimized individually and simultaneously as multi-objective optimization problem, while satisfying equality, in-equality, practical and device operational constraints. A new optimization method, based on two stage initialization and random distribution processes is proposed to test the effectiveness of the proposed approach on IEEE-30 bus system, and the detailed analysis is carried out.