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In distribution network, with the installed of photovoltaic (PV), bought many problems. One of the most concerned problems is the overvoltage in the terminal bus of distribution network. It is caused by the reverse power flow which brought out by the increase of the PV sources penetration. In this paper, an improved PQ-Q (V) control strategy is proposed to alleviate such problem. The economic performance...
A modular multilevel converter based solid state transformer (MMC-SST) is proposed in this paper. By adopting the modular multilevel converter as the grid-connected converter at the high voltage (HV) side, the proposed MMC-SST can be applied to the high voltage level, and to comprehensively deal with the power quality problems in the High and medium voltage distribution networks. The topology and...
Wind power is a challenge for active operation of distribution networks because of its stochastic nature. In this paper, a two-stage stochastic-programming-based optimal power flow model is proposed for the short-term operation (e.g., 1 h ahead) of distribution networks with wind power. In this model, the wind power is dispatched in the first stage, and then, in the second stage, not only the additional...
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