Design and implementation of a 154 kV, ±50 MV Ar Transmission STATCOM based on 21-level Cascaded Multilevel Converter

Gültekin B., Özgür C. G., Atalik T., Deniz M., Biçer N., ERMİŞ M., ...Daha Fazla

2010 2nd IEEE Energy Conversion Congress and Exposition, ECCE 2010, Atlanta, GA, Amerika Birleşik Devletleri, 12 - 16 Eylül 2010, ss.3936-3948 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/ecce.2010.5617795
  • Basıldığı Şehir: Atlanta, GA
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.3936-3948
  • Anahtar Kelimeler: Modified selective swapping, Multilevel converters, T-STATCOM, Terminal voltage regulation
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In this research work, design and implementation of a 154 kV, ± 50 MVAr Transmission STATCOM (T-STATCOM) has been carried out primarily for the purposes of reactive power compensation and terminal voltage regulation, and secondarily for power system stability. The implemented T-STATCOM consists of five 10.5 kV, ±12 MVAr Cascaded Multilevel Converter (CMC) modules operating in parallel. The power stage of each CMC is composed of five series connected H-Bridges (HB) in each phase, thus resulting in 21-level line-to-line voltages. Due to modularity and flexibility of implemented HBs, a CMC module power density of 250kVAr/m3is reached, thus making the mobility of the system implementable. DC link capacitor voltages of HBs are perfectly balanced by means of the Modified Selective Swapping Algorithm proposed. The field tests carried out at full load in the 154 kV transformer substation where T-STATCOM is installed and put into service have shown that the steady-state and transient responses of the system are quite satisfactory. © 2010 IEEE.