Stochastic Production Simulation of Power System with Photovoltaic Generation
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摘要: 光伏发电规模越来越大,其并网对系统的影响不容忽视,研究含光伏发电的电力系统随机生产模拟具有重要意义。在空间上以一个光伏逆变器组为单位,建立了考虑光照与元件故障双重因素的光伏逆变器组多状态模型。在时间上以一天为一个时段,各时段采用不同的多状态模型。将多状态模型加入随机生产模拟,采用等效电量函数法进行计算,得到了发电量、可靠性及经济性等指标。评估了光伏发电容量效益和电量效益。算例分析验证了本文所提方法的合理性。Abstract: The increasing of photovoltaic power generation scale has great impact on power systems, which should not be neglected, so simulation study on stochastic production of power grid with photovoltaic power generation is of great significance. In the spatial scale, the multi-state model of a PV-inverter is built by considering dual factors of solar irradiation and component failure with a PV-inverter as a unit. In the temporal scale, different multi-state models are adopted in different time intervals with one day as an interval. With the multi-state model added to stochastic production simulation, equivalent energy function approach is used to calculate such indexes as the amount of power, reliability, economic. Therefore, the capacity benefit and electricity benefit of PV generation are evaluated. In the end, the rationality of the proposed method is verified by examples.
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