SUMMARY Modular multilevel converter (MMC) type topology is considered an enabling technology for expanding the voltage sourced converter (VSC) applications and thus providing its operational benefits with low switching power loss comparable to that of the conventional thyristor-based line commutated converters. However, due to its inherent topological and consequently control complexity, compu...

The battery charging power electronics interface of an electric vehicle (EV) must be capable bidirectional flow to enable both grid-to-vehicle (G2V) and vehicle-to-grid (V2G) operations. In the presence a single/three-phase AC supply, front-end EV charger employs factor correction (PFC) rectifier, which should have capability facilitate V2G mode. A conventional active rectifier functions in boo...

This article presents a single-stage five-level boost inverter (5L-SBI) topology with reduced power components. The proposed falls under the self-balanced switch-capacitors (SCs) type and combines both DC/DC converter switched-capacitor cell. advantages of topologies include following: number switch counts is reduced, maximum voltage gain two times higher than input voltage, capacitor’s chargin...

The current major restructuring of the electricity market and the advances of new technology add new complexities in the power system application software, particularly optimization. Minimization of the impact of a transaction on unrelated thirdparty facilities, or maximization of the power transfer between utilities must now be formulated as new constraints or objective functions. The dispatch...

-In this paper, multi-objective optimal placement (MOOP) of multi-type flexible AC transmission systems (FACTS) devices for Thailand power system is proposed. Four types of FACTS devices are used: thyristor-controlled series capacitor (TCSC), thyristor-controlled phase shifter (TCPS), unified power flow controller (UPFC), and static var compensator (SVC). The problem is decomposed into the opti...

This work reports the thermal modeling and characterization of a thyristor. The thyristor is used in a 6.5-MW generator excitation bridge. Temperature measurements are performed using fiber Bragg grating (FBG) sensors. These sensors have the benefits of being totally passive and immune to electromagnetic interference and also multiplexed in a single fiber. The thyristor thermal model consists o...

Abstract This paper proposed a new voltage-boosting 13-level switched-capacitor (SC) cost-effective inverter. The topology comprises fourteen transistors, three capacitors and single DC source to produce staircase waveform. capacitor voltage balancing problem is inherently solved by the series/parallel technique. Structural description, working principle, calculation of optimum values capacitan...

Direct two-dimensional simulations are used to analyse the possibility of controlling the carrier concentration in the gated base of a GaAs optoelectronic thyristor, which operates in the regime of incomplete turn-o€ . Modelling results indicate that the number of carriers, light intensity, current distribution, and the position of the light-emitting region the gated base of the thyristor can e...

The problems of reactive power compensation and improving the quality electrical energy in supply systems industrial enterprises are inseparable. Their relevance is due to widespread use electric receivers that consume distort network, as well implementation new technologies, equipment into production make increased demands on consumed. An important characteristic rationed by GOST 32144–2013 no...

Switched-capacitor-based multilevel inverters for boost-type dc–ac power conversions usually exhibit a trade-off between the switch count and switch-voltage rating, i.e., reduction of one necessitating an increase other. Such dilemma is well addressed in this article by proposing novel single-phase nine-level inverter based on switched-capacitor network with single switch. The proposed then red...