DC Power Flow for Power System Optimization

This letter presents a new formulation for the loss-concerned dc power flow that is suitable for optimization-based power system operation and planning. The proposed approach equivalently recasts a previously reported model that explicitly represents the differences in the power flows at the receivingand sending ends of transmission lines due to resistive losses. More specifically, motivated by industry standards, the proposed formulation does not rely on nodal voltage phase angles, unlike the original model. The requirement of fewer optimization variables may yield significant computational savings without deteriorating solution quality as numerically verified with an illustrative network-constrained economic dispatch problem.

本信函提出了一种针对损耗相关直流电力流的新方法，该方法适用于基于优化的电力系统运行与规划。所提出的方法等效地重构了先前报道的模型，该模型明确表征了传输线接收端和发送端由于电阻损耗引起的电力流差异。具体而言，受行业标准启发，所提出的公式不依赖于节点电压相角，与原始模型不同。优化变量数量的减少可能在不降低求解质量的情况下显著节省计算资源，这一点通过一个示例网络约束经济调度问题进行了数值验证。