考虑弃风限制的电网鲁棒安全经济调度

Robust Security Economic Dispatch Considering Wind Power Curtailment

含大规模风电接入的电网,其所能消纳的风电出力区间受到电网备用容量和线路传输功率两方面约束。该文提出设置最优弃风限制来确定安全风电出力区间,保证电网备用容量充裕且各条线路的传输功率不越限。在算法上,将初始风电出力区间转化为含{0,1}整数变量的双线性规划(BLP)问题,并且运用BIG-M理论将BLP问题转化为混合整数线性规划(MILP)问题,从而达到整体求解效果。采用改进的IEEE 14节点系统进行算例测试,分别分析了电网备用容量和线路传输功率对初始风电出力区间的影响,最后优化得到可行的安全风电出力区间,优化结果表明了该方法的有效性和可行性。

Accessed with large scale wind power, the wind power absorption ability of power grid are restricted by reserve capacity and line transmission power. This paper proposed that setting an optimal wind power curtailment for making safety wind power output interval, in order to ensure that the reserve capacity is sufficient and the line transmission power is under limitation. In the aspect of arithmetic, this paper turned the BLP problem to a MILP problem so as to achieve the overall solution. Tested by improved IEEE 14 bus system, this method analyzed the influence on initial wind power output interval caused by reserve capacity and line transmission power respectively. Finally, a feasible safety wind power output interval could be achieved. The optimal results showed that the method was effective and feasible.