【目的】高比例分布式光伏(DPV)接入改变了主动配电网(ADN)的运行方式，PV出力的随机性和波动性，导致配电网出现有功损耗过大、电压波动增大以及无功配置不均衡等问题。因此，本文提出了一种基于改进电气距离的网络分区电压控制方法，旨在实现含高比例DPV的ADN的分区电压控制。【方法】鉴于集中式电压优化模型在高比例DPV场景下决策变量与约束条件规模庞大、计算复杂度过高，本文首先提出基于改进电气距离的网络分区方法，将ADN划分为多个可控子区域以降低求解规模；其次，针对分区中相邻子区域边界节点的电压协调问题，设计了一种分布式电压控制策略；最后，采用基于黏菌算法的分布式求解方法实现该策略的高效求解。【结果】利用IEEE 33节点模型和云南曲靖的199节点真实系统进行仿真验证。结果表明，所提基于分区的分布式电压控制优化方法不仅能有效维持系统电压水平，其分布式求解效率也显著优于集中式优化方法。【结论】所提方法成功实现了各子区域电压的协同控制，有效维持了系统电压水平。

[Objective] The high proportion of distributed photovoltaic (DPV) integration changes the operation of the active distribution network (ADN), and the randomness and volatility of PV output leads to excessive active losses, increased voltage fluctuations, and unbalanced reactive power allocation in the distribution network. Therefore, this paper proposes a network partition voltage control method based on improved electrical distance, aiming to achieve partition voltage control for ADN with high proportion DPV. [Methods] In view of the large scale and high computational complexity of the decision variables and constraints of the centralized voltage optimization model in a high percentage of PV scenarios, this paper firstly proposed a network partition method based on the improvement of the electrical distance, which divided the ADN into multiple controllable sub-regions to reduce the solution scale. Secondly, a distributed voltage control strategy was designed for the voltage coordination problem at the boundary nodes of adjacent sub-region in the partition. Finally, a distributed solution method based on the slime mold algorithm was used to achieve an efficient solution for this strategy. [Results] Simulation verification was carried out using the IEEE 33 node model and a 199 node real system in the Qujing of Yunnan Province. The results showed that the proposed partition-based distributed voltage control optimization method not only effectively maintained the system voltage level, but also its distributed solution efficiency was significantly better than the centralized optimization method. [Conclusion] The proposed method successfully realizes the cooperative control of voltage in each sub-region and effectively maintains the system voltage level.

国家重点研发计划项目(2022YFB2703500)