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In this paper, a three-port bidirectional dc-dc converter is proposed for grid-interactive photovoltaic (PV) system application. The three-phase topology is suitable for residential power requirement. The control of battery and PV are naturally decoupled. In addition, the port interface with PV is current type which can implement maximum power point tracking (MPPT) and soft switching under wide variation...
This paper presented a grid-connected inverter incorporating multiple technical concepts like “single-stage”, “multilevel” and “transformerless”, and thus attracting in cost and efficiency. Also energy storage (ES) was integrated to assist extensive power regulation. A complete control scheme was developed to achieve wide range real/reactive power management involving pure real power, pure reactive...
This paper presents the development of modular dual-half-bridge (MDHB) bidirectional dc-dc converter as the dc-dc stage of 10 kVA single phase solid state transformer (SST) for future renewable electric energy distribution and intelligent power management systems. The dc-dc converter, connected to 12 kV DC bus generated by an ac-dc rectifier interfacing with 7.2 kV electric utility grid, is to provide...
Voltage security is a crucial issue in power systems especially under heavily loaded condition. In the new scheme of restructuring, voltage stability problem becomes even more serious. To solve the problem, we integrate reactive power compensation concept by static synchronous compensator (STATCOM) with equivalent-current injection (ECI). We derive a new STATCOM with ECI model. This paper shows the...
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