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Optimal placement and sizing of Static Var Compensators in power systems using Improved Harmony Search Algorithm

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This paper presents the application of the improved harmony search (IHS) algorithm for determining the optimal location and sizing of static Var compensator (SVC) to improve the voltage profile and reduce system power losses. A multi-criterion objective function comprising of both operational objectives and investment costs is considered. The results on the 57-bust test system showed that the IHS algorithm give lower power loss and better voltage improvement compared to the particle swarm optimization method in solving the SVC placement and sizing problem. Streszczenie. Artykuł przedstawia zastosowanie algorytmu IHS (Improved harmony search) do określania optymalnej lokalizacji kompensatora mocy biernej. Rezultaty testów wykazały że algorytm zapenia mniejsze straty mocy oraz zniekształcenia w porównaniu do innych metod optymalizacji. (Optymalizacja lokalizacji kompensatora mocy biernej z wykorzystaniem algorytmu IHS) Keywords: Static Var Compensator, Power Loss, Voltage Profile, Harmony Search Algorithm Słowa kluczowe: komensacja mocy biernej, algorytm HIS. Introduction Flexible AC transmission system (FACTS) can provide benefits in increasing system transmission capacity and power flow control flexibility and rapidity [1]. FACTS devices are power electronic converters that have the capability of controlling various electrical parameters in transmission circuits, facilities, both in steady state power flow and dynamic stability control. These devices include thyristor controlled series compensator, static Var compensator (SVC), unified power flow controller, static compensator (STATCOM), etc [2]. The most widely used shunt FACTS devices within power networks is the SVC due to its low cost and good performance in system enhancement. It is a shunt-connected static Var generator or absorber whose output is adjusted to exchange capacitive or inductive current so as to provide voltage support and when installed in a proper location, it [...]

Heuristic Optimization Techniques to Determine Optimal Capacitor Placement and Sizing in Radial Distribution Networks: A Comprehensive Review

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Capacitors in power systems are used to supply reactive power to minimize loss and to improve the voltage profile. The appropriate placement of capacitors is also important to ensure that system power losses and total capacitor costs are minimal. The capacitor placement problem is commonly solved using heuristic optimization techniques which are diverse and have been the subject of ongoing enhancements. This paper presents a survey of the literature from the last decade that has focused on the various heuristic optimization techniques applied to determine optimal capacitor placement and size. Streszczenie. Kondensatory używane są w sieciach zasilających do poprawy jakości napięcia - zmniejszenia mocy biernej. Ważną rolę odgrywa umiejscowienie kondensatora. W artykule zaprezentowano przegląd literaturowy prac na temat metod optymalizacji umożlwiających określenia optymalnej pozycji I wielkości kondensatora. (Heurystyczne techniki optymalizacji umiejscowienia kondensatora w promieniowych sieciach zasilających - przegląd stanu wiedzy) Keywords: Capacitor Placement, Radial Distribution Network, Heuristic Optimization, Power System Harmonics. Słowa kluczowe: sieci zasilające, kondensator, zawartość 1. Introduction Shunt capacitors in distribution networks are used for various purposes: reducing power loss, improving the voltage profile along feeders, and increasing the maximum transmitted power in cables and transformers. To reduce power loss, shunt capacitors, which are commonly installed in power distribution networks, are used to compensate for reactive power. However, the installation of shunt capacitors in distribution networks requires consideration of their appropriate location and size. Capacitor placement is important to maximize loss reduction by properly installing shunt capacitors while minimizing shunt capacitor costs. Distribution networks are unbalanced due to mutual coupling between phase conductors and loading on the di[...]

Optimal Placement and Sizing of Shunt FACTS Devices in Power Systems Using Heuristic Optimization Techniques: a Comprehensive Survey

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The Static Var Compensator (SVC) and the Static Synchronous Compensator (STATCOM), as two components of Flexible AC Transmission System (FACTS) devices, play an important role in controlling the reactive power flow to the power network. Because of economic considerations, identifying the best location for installing the SVC and STATCOM is also important. The FACTS devices placement problem is commonly solved using heuristic optimization techniques which are diverse and have been the subject of ongoing enhancements. This paper presents a survey of the literature from the last decade that has focused on the various heuristic optimization techniques applied to determine optimal placement and sizing of the SVC and STATCOM. Streszczenie. W artykule analizuje się optymalne usytuaowanie elementów SVC I STATCOM w systemie FACTS. Przedstawiono stan wiedzy wykorzystania do tego celu różnych heurystycznych metod optymalizacji. (Optymalne usytuowanie elementów SVC i STATCOM w systemie FACTS) Keywords: Static Var Compensator (SVC), Static Synchronous Compensator (STATCOM), Heuristic Optimization, Placement, Sizing. Słowa kluczowe: SVC - statyczny kompensator mocy biernej, STATCOM - statyczny kompensator synchroniczny 1. Introduction Flexible AC Transmission Systems (FACTS) can provide benefits in increasing system transmission capacity and power flow control flexibility and speed [1]. FACTS devices are power electronic converters that have the capability to control various electrical parameters in transmission circuits and facilities, both in steady state power flow and dynamic stability control [2]. These devices include Thyristor Controlled Series Compensator (TCSC), Static Var Compensator (SVC), Unified Power Flow Controller (UPFC), Static Compensator (STATCOM), and others [3]. The SVC is the most widely used shunt FACTS device in power networks because of its low cost and good performance in system enhancement. It is a shuntconnected static[...]

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