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To improve the reliability of photovoltaic (PV) energy storage (PVES) system, the output voltage robust PI controller design criteria and method are proposed in this paper. First, the boost converter with an input capacitor is taken as an example, and its small signal model including the dynamic equivalent circuit of solar cell is built up. Based on this, the stable condition of the PVES system in...
A novel energy storage system with super-capacitors (SCs) which based on combined bidirectional DC/DC converter (BDC) was studied. The inconsonance of low monomer voltage rating of the SCs and the high voltage applications can be mitigated in this system. A double closed-loop control strategy for the combined BDC based ESS was presented, which decouples the inductance current control and the BDC voltage...
This paper presents an energy storage system based on ultra-capacitor to absorbing the regenerating energy of urban rail transit and releasing the energy when the train starts, which can cut down the energy waste. A modular power conversation scheme is proposed to accommodate the application of different electric supply system, with several module connected in series to endure high supply voltage...
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