考虑可控光伏系统的配电网有功-无功协调优化

利用传统无功优化手段,并结合光伏电源有功与无功功率输出能力,实现配电网有功-无功协调优化,以促进光伏消纳和降低损耗。首先,建立了混合整数非线性非凸模型,并运用二阶锥松弛技术将其转换为混合整数二阶锥规划(mixed integer second order cone programming,MISOCP)模型;其次,利用奔德斯分解方法将MISOCP模型分解为主问题和子问题,两问题经奔德斯割交替迭代求解,提高了计算效率;最后,在改进的IEEE 33节点系统上进行算例分析,验证了光伏逆变器优化调度(optimal inverter dispatch,OID)策略的优越性以及所提方法的鲁棒性、精确性与快速性。

Coordinated Active-Reactive Power Optimization of Distribution Network Considering Controllable Photovoltaic System

In order to improve photovoltaic power accommodation and reduce network loss,this paper combines traditional reactive power optimization method and the active and reactive power output capability of photovoltaic power so that coordinated optimization of reactive and reactive powers in distribution network is achieved.Firstly,a mixed integer nonlinear and non-convex model is established and converted into a mixed integer second-order cone programming(MISOCP)model using the second-order cone relaxation.Secondly,the MISOCP model is decomposed into main problem and sub-problem using Benders decomposition method.In addition,for above two problems,and alternate iteration based on Benders cut is performed so that the computation time is reduced.Finally,improved IEEE 33-node system is taken as an example to verify superiority of photovoltaic optimal inverter dispatch(OID)scheme and robustness,accuracy and efficiency of the proposed algorithm.