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The Multi-level Virtual Conductor (MLVC) is a bidirectional DC-DC converter that has been controlled in a designated strategy so as to allow it to behave like a conductor has a voltage difference between its terminals. It is considered, in the MLVC, that both input and output of a bi-directional DC-DC converter are independent current sources. These current sources can be considered as a load or as...
This paper presents a new stability criterion for bidirectional DC-DC converters in a dc power system. Factually, it is so sophisticated to use conventional stability criteria to assess the stability of a dc power system consists of huge number of nodes. The proposed criterion gives an overall indicator for the stability at each node in the dc power system. It based on perturbing the system at a certain...
A new control approach for bidirectional DC-DC (BDC) converter is proposed in this paper. This approach aims at controlling a BDC in such a way that makes it behaves like a multi-level virtual conductor. As a matter of fact, the voltage difference between the terminals of any conductor is zero volts. Conversely, the main target of the proposed control approach is to keep the voltage difference between...
This paper proposes a fuzzy set optimization approach for capacitor allocation in radial distribution system. In this approach, a membership function for voltage profile constraint has been used. Moreover, another membership function incorporating feeder section active power losses and total power losses constraints has been proposed. This membership function indirectly imposes thermal capability...
In this paper, seamless model of bi-directional DC-DC converter which is applicable to bi-directional power transfer is proposed. Conventional modeling method of bi-directional DC-DC converter is complex, because different models are needed for different directions of power flow. On the other hand, seamless model can be applied for both directions of power flow. Seamless circuit model is expressed...
In this paper, bi-directional DC-DC converter is analyzed using a seamless dynamic model with an independent voltage source and an independent current source, which polarity depends on the direction of the power flow. In the seamless dynamic model, the independent voltage source represents a battery and an independent current source represents the load or energy source. A small signal model is derived...
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