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The facility cost of the storage systems are a critical issue in the construction of micro grid, which is the core of the renewable energy. We propose the direct current mutual power interchange system as a way to reduce the storage battery capacity. This paper reports the outline of the proposed system and the verified result on the effect caused by electricity interchange upon the reduction of battery...
This paper proposes droop control for Multi-Level Virtual Conductor (MLVC). This control method aims at overcoming the problem that circulating current flows when MLVC constitutes a mesh connection. Generally, the voltage difference between the terminals of any conductor is zero volts. However, MLVC can keep the voltage difference between the converter terminals constant at a certain value. In this...
This paper presents a novel control scheme to control the flow of active and reactive power through a single-phase bi-directional AC/DC converters used for telecom backup systems. The proposed controller enables the telecom facilities to control the power flow in both directions from grid to telecom and telecom to grid. In this paper the fuel cell system coupled with ultra-capacitors has been used...
A circuit topology for a bi-directional isolated DC-DC converter and its operation are proposed and evaluation results are discussed. This converter is based on a voltage-source primary circuit and a current-source secondary circuit with an active clamp circuit. To decrease the lower limit of the input voltage for a large voltage range, the proposed topology uses a “small boost circuit” consisting...
This paper propose a high efficiency DC-DC converter and simple control method for the multi energy source management. The proposed DC-DC converter consists of the two high efficiency DC-DC converters such as the switched capacitor DC-DC converter and Current resonant type isolated DC-DC converter. In addition, this paper describes the novel control method for the multi energy source management. The...
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