Design and Operation of SVC for Voltage Support at Mussafah Substation in Abu Dhabi

Abstract

from heavy demand areas. Growing power demands are mainly Abstract-New SVC was commissioned in March 2005 at commercial not industrial, i.e. represented by air-conditioners, MUSSAFAH 400kV/220kV substation in Abu Dhabi, UAE. The they are constant active power loads and tend to absorb more capacity of the SVC is +/-200MVA. The SVC consists of two reactive power when system voltage is lower. identical SVCs of +/-lOOMVA connected to 220kV bus, and they are operated as independently or in parallel. This SVC is located As far end of the 400kV network is connected to power near heavy load center with air-conditioner characteristic loads then the SVC design was carried out carefully. The SVC provides plantos Th e2ofkV circuit is mai ned by a Vr of * (capacitive) and -3OMVA (inductive) were obtained from the M. Ibrahima and A. A. Atia are with TRANSCO, Abu Dhabi, United Arab steady state analysis. Emirates 173 (

A proposal of Modular Multilevel Converter applying three winding transformer

“…Grid connected converters such as SYC (TCR) apply air core reactors [13], which are used in MMC also. It has very simple configuration so achieving lower cost and removing risk of magnetic saturation.…”

“…AC side current dynamics o{the proposed MMC In this chapter, an AC side current dynamics of the proposed MMC is described. Defined three phase AC line voltage is vs( r. s.t), AC line current is i s (r.s.t), and the voltage and current equation of primary side of proposed transformer is given by equation(13).…”

Power Quality Improvement Using Modular Multilevel Converter Applying Three Winding Transformer

“…The three phase AC line voltage and AC line current is vs(r,s,t) and is(r,s,t). The voltage and current equation of primary side is given by equation (10). Where, vsec(r,s,t) is secondary voltage of ideal transformer.…”

A Proposal of Modular Multilevel Converter Using a Three-winding Transformer

“…Defined three phase AC line voltage is v p(r,s,t) , AC line current is i p(r,s,t) , and the voltage and current equation of primary side of proposed transformer is given by Eq. (13).…”

“…As MMC has these advantages, researches are advancing to high voltage applications such as high voltage direct current transmission (HVDC) (9) (10) , and it has been already operated in actual transmission systems (11) (12) . The reactors used in the typical MMC are of air core type, just like those used in the grid connected devices such as SVC (TCR) (13) . This type of reactors has a very simple configuration so it can achieve low cost and remove the risk of magnetic saturation.…”