采用盒式鲁棒优化的并网光伏电站极限容量计算

Capacity Limit Calculation of Grid-connected Photovoltaic Power Station Based on Cassette Robust Optimization

针对光伏发电出力的不确定性,提出运用鲁棒优化理论来研究并网光伏电站的极限容量问题。采用盒式鲁棒优化方法,建立系统运行约束条件下的光伏电站极限容量优化模型,模型中以太阳辐射强度作为不确定参数,通过其变化范围来描述光伏发电出力的不确定性,依据优化对偶理论,将模型转化为确定性的线性规划问题,然后进行求解。某46节点系统的仿真计算结果表明,不同的并网节点、扰动范围对光伏电站极限容量有明显影响,验证并网光伏电站极限容量的盒式鲁棒优化模型的可行性和有效性。

In allusion to the uncertainty of photovoltaic power output,robust optimization method is adopted to study the capacity limit of grid-connected photovoltaic power station.An optimization model of capacity limit of photovoltaic power station under constraint conditions is built by using cassette robust optimization method.In the model,the solar radiation intensity which is uncertain parameter is used for describing the uncertainty of photovoltaic power output,and is transformed to linear programming problems by optimized duality theory.Case study on a 46-bus system is conducted to verify the model,which indicates that the proposed model is practical and effective.The test results show that the different grid-connected node,and fluctuation region have greatly influence on the capacity limit of grid-connected photovoltaic power station.