The research about PV/wind hybrid energy considering grid security constraints

With the high permeability of intermittent power supply in the power grid gradually increased, it will have a great influence on the stable operation of the power grid. Single wind or photovoltaic power generation will lead to great volatility that requires thermal power unit to supply sufficient spare capacity to participate in peak shaving, which influence power plant´s benefit. The optimization scheduling strategy of PV/wind hybrid energy which is combined to the grid is proposed in this paper using of wind and photovoltaic generating space-time complementarities strategy. And it is verified in the 3 generators and 9 nodes system. Treat wind generator and photovoltaic battery as a PQ node. Compare the generating cost in the cases of single wind power generation and PV/wind hybrid energy that is combined to the power grid. It is concluded that the latter requires smaller generating cost than the former.