Türkiye elektrik iletim sistemindeki bir hattın iki kutuplu YGDA sistemine dönüştürülerek modellenmesi ve arıza analizinin yapılması

Öz

Enerji kaynaklarının önemi arttıkça kullanılan ekipmanlar için verimlilik konusu önem arz etmektedir. Özellikle karbon emisyonlarının azaltılmasına yönelik çalışmaların yoğunlaştığı bu günlerde daha verimli ekipmanların kullanılması gerekmektedir. Elektrik iletiminde ise uzun mesafelerde iletim olanağı sağlayan YGDA sistemleri düşük hat kayıpları ile daha verimli çalışmaktadır. Türkiye elektrik iletim sisteminde doğru akım ile iletim henüz yapılmamaktadır. Bu çalışmada AA ve DA ile iletim seçeneklerinin karşılaştırılması amacıyla mevcut iletim sisteminde bulunan AA hattın DA hatta dönüştürüldüğü varsayılarak bir YGDA sistem modellenmiştir.   Yaklaşık 600 km uzunluğunda olan iki hat birleştirilerek DA hatta dönüştürülmüş olup aynı özelliklerde elektrik iletimi yapan AA hatlar ile karşılaştırılmıştır. Ayrıca sistemin koruması ve ekipman seçimi için gerekli olan arıza analiz çalışması da yapılmıştır. YGDA sisteminde arıza analizi çalışması için PSCAD simülasyon programı ile bir devresi oluşturulmuştur. DA hattı için Kutup-kutup, kutup-toprak arızaları ve AA üç faz kısa devre arızaları simüle edilmiştir. Bu arıza simülasyonlarında doğrultucu tarafı hat akım grafikleri elde edilerek birbiri ile karşılaştırılmıştır. Bununla birlikte arıza direnci ve akım sınırlama reaktörü büyüklüklerinin arıza akımına olan etkisi de incelenmiştir.

Anahtar Kelimeler

• Yüksek gerilim doğru akım (YGDA)
• PSCAD
• Enerji iletimi
• Arıza analizi

Modeling a power transmission line located in the Türkiye's electric transmission system by converting to bipolar HVDC system and fault analysis

Abstract

As the importance of energy resources increases, the issue of efficiency in the equipment becomes important. Especially in these days when efforts to reduce carbon emissions It is inevitable to use more efficient equipment are intensified. HVDC systems, in electricity transmission which provide transmission over long distances, are included in this scope with their low line losses. With direct current transmission is not yet carried out in the Turkish electricity transmission system. In this study, in order to compare AC and DC transmission options, an HVDC system was modeled by converting the existing AC lines in the into DC lines. 600 km long who lines, were combined and converted into a DC line and compared with AC lines transmitting at the same distance and features. In addition, a detailed fault analysis study was carried out, which should be carried out in detail for the protection of the system and equipment selection. A fault simulation circuit was created with the PSCAD program for fault analysis in the HVDC transmission system. For DC line Pole-to-pole, pole-to-ground faults and AC three-phase short circuit fault situations are simulated. The effects of fault resistance and limiting reactor values on the fault current were also examined.

Keywords

• High Voltage Direct Current (HVDC)
• PSCAD
• Power transmission
• Fault analysis

Kaynakça

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