考虑风电时空相关性的电气互联系统分布式优化调度

Distributed optimal dispatching of the integrated electricity and natural gas systems considering spatial-temporal correlation of wind power

风电具有的波动性及间歇性给电气互联系统的优化运行带来了随机性问题,增大了电气互联系统运行管理的难度。首先,应用基于预测箱的场景生成方法得到典型风电场景,对风电的波动性与多风电场间的相关性进行表征。其次,建立考虑配电网、天然气网络及各种耦合元件的电气互联系统日前经济调度模型,并基于ADMM(交替方向乘子法)进行分布式求解。最后,以IEEE 33节点配电网和7节点天然气网组成的电气互联系统为例,验证了所提模型的有效性。

The fluctuation and intermittency of wind power have brought about unexpected problems to the optimal operation of the integrated electricity and natural gas systems.Furthermore,it makes the operation management of the integrated system more difficult.Firstly,a typical wind power scenario is obtained by applying a scenario generation method based on a prediction box to characterize the fluctuation of wind power and the correlation between multiple wind farms.Secondly,a day-ahead economic dispatching model of the electrical interconnection system considering the distribution networks,natural gas networks and various coupling elements is developed,and a distributive solution based on the alternating direction method of multipliers(ADMM)is performed.Finally,the effectiveness of the proposed model is verified by taking an electrical interconnection system consisting of an IEEE 33-node distribution network and an IEEE 7-node natural gas network as an example.