含分布式储能的光伏发电系统建模与仿真

Modeling and simulation of a PV system with DESS

太阳能是一种新型可再生能源且在开发利用太阳能过程中不会污染环境。太阳能发电在解决全球气候变暖及能源问题中发挥着极其重要的作用,但因受自然条件和气候因素的影响,太阳能辐照度具有极大的不稳定性,直接导致了光伏发电输出功率具有明显的波动性。为了使光伏发电系统能够提供连续稳定的电力,将分布式储能作为主要的储能方式应用于光伏发电系统中,基于PSCAD/EMTDC建立了含分布式储能的光伏发电系统仿真模型。经仿真结果表明,光伏电池最大功率跟踪点(MPPT)能够有效地提高光伏阵列的输出功率;分布式储能的介入使得光伏发电系统的输出功率曲线更趋平稳,缓和了光伏发电不稳定性对电网的冲击。

A PV system based on DESS was proposed. Such a PV system took advantage of MPPT in the PV system and the strong point in the DESS and improved the original running condition of PV system. The simulation model of PV system based on PSCAD/EMTDC containing DESS was built. And the result of the simulation shows that MPPT can effectively improve the power output of the PV system and DESS can solve the problem of extreme fluctuations in the output power of the PV system fairly reducing the bad impact from the instability of PV system to the net.