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A dc to dc multilevel modular capacitor clamped converter (M2C3) with electrical grounding isolation and bidirectional power flow for a dc microgrid application is proposed in this paper. The principle of this particular M2C3 is based upon volt-sec balance of capacitors connected as a modular cell in the circuit so that the M2C3 can be similarly operated as a dc transformer. The M2C3 can be interfaced...
Z-source grid-connected inverter for interfacing with photovoltaic cells is developed in this paper. The application of photovoltaic cell normally faces the shading problem of solar light: this will lead to inconsistent power generation and low system efficiency; therefore, the z-source circuit is applied in grid connected inverter application to improve the boosted dc bus voltage capability. The...
A multilevel converter charger using superimposed pulse frequency technique for prolonging lead-acid battery lifetime is developed in this paper. The proposed state of charge is divided to three states: superimposed pulse frequency charge (SPF), Constant current charge (CC) and Constant voltage charge (CV). SPF is charging state for rejuvenating a deteriorated battery due to sulfation at the plates...
Capacitor lifetime monitoring for multilevel modular capacitor clamped dc to dc converter (M2C3) are presented in this paper. M2C3 can supply a multilevel dc output voltage by using capacitors and power switches together with a method of charge and discharge balance. Each capacitor lifetime is somehow various; the higher voltage will lead to a shorter lifetime of a capacitor than the low voltage one...
An application of gird-connected inverter interfacing with renewable energy resources for electrical power generation such as photovoltaic, fuel cell, and microturbine has a higher attraction. The application of photovoltaic cell normally faces the shading problem of solar light: this will lead to inconsistent power generation and low system efficiency; therefore, the z-source grid connected inverter...
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