Power quality analysis of a Synchronous Static Series Compensator (SSSC) connected to a high voltage transmission network

This paper presents the power quality analysis of a Synchronous Static Series Compensator (SSSC) connected to a high-voltage transmission network. The analysis employs a simplified harmonic equivalent model of the network that is described in the paper. To facilitate the calculations, a software toolset was developed to measure the voltage harmonics content introduced by the SSSC at the Point of Common Coupling (PCC). These harmonics are then evaluated against the stringent power quality legislation set on the Spanish transmission network. Subsequently, the compliance of an SSSC based on two types of Voltage Sourced Converters (VSC): a 48-pulse and a PWM one, usual in this type of applications, is assessed. Finally, a parameter sensitivity analysis is presented, which looks at the influence of parameters such as the line length and short circuit impedances on the PCC voltage harmonics.

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