Abstract
With the increasing penetration of distributed photovoltaic (PV) in distribution network (DN), and the randomness of PV power output, so the DN with PV is prone to voltage fluctuation or even overvoltage. In this paper, a double-layer distributed PV voltage control strategy is proposed. This strategy takes full advantage of reactive power of PV inverter connected to DN and aims at reducing the loss of uploading power of PV, so as to achieve collaborative control of buses voltage. It adopts the double-layer control strategy of PV system in DN, as well as the three modes switching of maximum power point tracking (MPPT), reactive power regulating and power factor regulating of PV. On the premise of realizing the effective control of buses voltage, it can reduce the loss of uploading power of PV to the greatest extent. Finally, the proposed distributed PV voltage control strategy is verified through a typical DN case based on the real time digital simulation (RTDS).
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