An Operation Optimization Model for Active Distribution Network Considering Load Margin

作者：Ke, Ziyang^*; Wang, Longjun; Wang, Gang

来源：Power System Technology, 2018, 42(8): 2570-2576.

DOI：10.13335/j.1000-3673.pst.2018.0756

• Active distribution network (ADN)
• Active distribution networks
• Load margin
• Maximum power
• Mixed integer programming model
• Operation optimization
• Power supply capabilities
• Topological constraints

When distribution network operates, it is necessary to reserve certain load margin to cope with rapid change of load. Active distribution network (ADN) has a greater power supply capability than traditional distribution network after installing DG and ESS. However, the distribution of the load margin is not balanced due to uncertainty of DG output, leading to the fact that the distribution network can not well cope with load fluctuations. This paper establishes a mixed integer programming model for ADN considering load margin. The model takes the maximum load margin as objective, taking into account balance distribution of load margin, power flow constraints and topological constraints. Results show that: 1. The power supply capacity of the ADN becomes stronger and distribution of the load margin more balanced;2. The objective function considers the load margin balance, the sum of load margin is the same, and the load margin distribution is more balanced, the distribution variance, significantly reduced from 0.021to 0.005, can better improve ability of the distribution network to cope with load fluctuations;3. When considering load margin balance distribution, ESS emergency load compensation capacity increases by 2% in comparison with the case not considering the load margin, the ESS emergency load compensation gap is reduced by 6%, and the anti-interference ability is significantly improved.

• 出版日期2018-8-5
• 单位华南理工大学