Step by Step Design Procedure of a Distribution Static Compensator (DSTATCOM)

Öz

DSTATKOM, dağıtım sistemlerinde güç kalitesi problemlerini düzeltmek için kullanılan güç iyileştirici cihazlardan biridir. DSTATKOM’ un performansı tamamıyla güç devresinin ve kontrolcü algoritmasının uygun seçimiyle ilgilidir. DSTATKOM’un güç devresi DA bara kapasitöründen, doğrultucudan ve pasif filtreden oluşur. DSTATKOM’un kontrol devresi referans sinyal çıkartımından, DA bara gerilim kontrolünden, AA gerilim kontrolünden ve anahtarlama sinyali üretiminden oluşur. Kompanze eden akım referans sinyalleri genellikle Anlık Simetrik Bileşen Teorisi (ASBT) ve dq teori tabanlı metot kullanarak ölçülen değerlerden üretilir. Gerilim kontrollü doğrultucuda (GKD) DA barayı sabit gerilimde tutmak için genellikle PI kontrolcüsü kullanılır. Ayrıca, doğrultucu çıkışına üçgen bağlı bobin-kondansatör-bobin (BKB) pasif filtresi bağlayarak, DSTATKOM tarafından üretilen yüksek dereceli harmonikler kolayca ve etkin bir şekilde yok edilmektedir. Bu çalışma, detaylı olarak 300kVA DSTATKOM'un güç ve kontrol devreleri için tasarım prosedürlerini sunmaktadır

Anahtar Kelimeler

• Dağıtım sistemi statik senkron kompanzatörü, Güç devresi, Kontrol devresi, Güç kalitesi

Bir Dağıtım Sistemi Statik Senkron Kompanzatörün (DSTATKOM) Adım Adım Tasarım Prosedürü

Öz

DSTATCOM is one of the power conditioning devices that is used to mitigate power quality problems in distribution systems. The overall performance of the DSTATCOM is strictly related with the proper selection of power circuit configuration and controller algorithm. The power circuit of DSTATCOM consists of dc link capacitor, inverter and passive filter. The control circuit of DSTATCOM consists of reference signal extraction, DC link voltage control, AC voltage control and switching signal generation. Compensating current reference signal is generally derived from the measured quantities by the use of the Instantaneous Symmetrical Component Theory (ISCT) and dq theory based method. A proportional–integral (PI) controller is generally used to maintain a constant voltage at the dc-link of a Voltage-Source Inverter (VSI). Furthermore, by connecting a delta connected inductor-capacitor-inductor (LCL) passive filter at inverter output, the high order harmonics generated by the DSTATCOM can be easily and effectively eliminated. This study presents the design procedures for power and control circuits of 300 kVA DSTATCOM in detail

Anahtar Kelimeler

• Distribution static synchronous compensator, Power circuit, Control circuit, Power quality

Kaynakça

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