基于有载调压变压器线性化模型的配电网无功优化二阶锥松弛建模及仿真

SOCP Relaxed Modeling and Simulation of VAR Optimization in Distribution Networks based on Linearized Model of OLTC Transformer

针对配电网络的无功优化问题,提出了一种将无功补偿设备和有载调压变压器同时作为调节手段,以减少网损和电压偏差的无功优化模型,其中的控制变量选为静态和离散无功补偿设备、分布式电源以及变压器分接头档位,并通过二阶锥松弛和有载调压变压器的精确线性化建模将非凸NP-hard优化模型转化为混合整数凸优化问题求解。采用IEEE33节点算例测试,结果表明相比传统的无功优化模型,所提模型可以显著降低网损和电压偏差。

For reactive power(VAR)optimization in distribution networks,a VAR optimization model is proposed,in which both reactive power compensator and OLTC transformer are used as adjusting means to reduce network loss and voltage deviation.The control variables are static and discrete reactive power compensators,distributed generators and transformer tap shifts.The nonconvex NP-hard optimization model is changed into a mixed integer convex optimization model through SOCP relaxation and precise linearization of OLTC.The results of IEEE33 bus test show that the proposed model can significantly reduce network loss and voltage deviation compared with the traditional reactive power optimization model.