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This paper presents a state model of a three-phase, four-wire five-level diode-clamped converter (DCC) employed in a Static Compensator (StatCom) for medium power applications. Two auxiliary circuits are used to equalize the voltages across the DC-bus capacitors. A detailed controller design procedure is presented. The proposed controller is composed of a DC-link voltage sub-controller to keep the...
Cascaded multi-level converters have some noticeable advantages such as high reliability, efficient fault management capability, simple structure, and adaptability with different power levels. Furthermore, these converters could be connected to medium-voltage networks without an isolating transformer. However, the voltage balancing of the DC capacitors is a highly challenging task particularly in...
The transient performance of 3-phase 4-wire self-excited induction generator (SEIG) feeding various types of linear and non-linear loads is analyzed in detail. The reactive power of SEIG and the load are being controlled by a 3-phase 4-wire configuration of static compensator (STATCOM). The STATCOM is an insulated gate bipolar transistor (IGBT) based, pulse width modulation (PWM) operated, four-leg...
The aim of this paper is to cover a comprehensive set of topics in order to contribute to the study of multipulse voltage sourced converter (VSC) based static synchronous series compensator (SSSC). The topics covered consist of full topology analysis as well as its voltages and currents, detailed modeling and laboratory implementation. The configuration studied is a 24-pulse VSC based SSSC. The detailed...
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