| 引用本文: | 贾一超,张红颖,范凯民,等.基于暂态电压特征的两阶段无功电压动态分区方法[J].电力系统保护与控制,2025,53(22):55-64. |
| JIA Yichao,ZHANG Hongying,FAN Kaimin,et al.A two-stage reactive voltage dynamic partitioning method based on transient voltage characteristics[J].Power System Protection and Control,2025,53(22):55-64 |
|
| 摘要: |
| 针对受端电网因高压直流输电和新能源发电的广泛应用而导致的暂态无功支撑不足的问题，提出一种考虑分区快速性和动态性的两阶段无功电压动态分区方法。首先，根据节点的暂态电压与阈值间的裕度和故障后稳态电压的恢复水平构建节点暂态电压特征，并依据该特征构造节点间的电气距离。然后，设计两阶段分区策略，第一阶段通过无功电压灵敏度实现无功电源与负荷的初始分区，第二阶段结合暂态电压特征，采用层次聚类算法对初始区域进行合并优化，并通过模块度指标筛选最优方案，同时以无功裕度与耦合度指标验证分区合理性。其次，基于不同典型场景的暂态电压特征设计动态调整判据，实现分区结构的自适应优化。最后，基于改进的新英格兰39节点算例的仿真结果验证了所提方法的有效性。 |
| 关键词: 无功电压分区 暂态电压特征 快速性 动态性 两阶段 |
| DOI：10.19783/j.cnki.pspc.241686 |
| 分类号: |
| 基金项目:国家电网公司总部科技项目资助(5100- 202306384A-2-3-XG) |
|
| A two-stage reactive voltage dynamic partitioning method based on transient voltage characteristics |
|
JIA Yichao1, ZHANG Hongying1, FAN Kaimin2, CHEN Ning1, CHENG Lin3, ZHU Lingzhi1, GE Luming1
|
|
1. State Key Laboratory of Renewable Energy Grid Integration (China Electric Power Research Institute), Beijing 100192, China;
2. School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China;
3. Northwest Branch of State Grid Corporation of China, Xi’an 710048, China
|
| Abstract: |
| To address the issue of insufficient transient reactive power support in receiving-end power grids due to the widespread application of high-voltage DC transmission and new energy generation, a two-phase reactive power dynamic partitioning method considering both speed and adaptability is proposed. First, transient voltage characteristics of nodes are constructed based on the margin between transient voltage and its threshold, as well as the steady-state voltage recovery level after a fault. Using these characteristics, electrical distances between nodes are derived. Then, a two-stage partitioning strategy is designed. In the first stage, initial partitioning of reactive power sources and loads is realized through reactive voltage sensitivity analysis; in the second stage, a hierarchical clustering algorithm is used to merge and optimize the initial region in combination with the transient voltage characteristics. The optimal scheme is selected using the modularity index, while reactive margin and coupling degree indexes are applied to validate the rationality of the partitioning. Second, dynamic adjustment criteria are designed based on the transient voltage characteristics under different typical scenarios to realize adaptive optimization of the partition structure. Finally, simulation results based on an improved New England 39-bus test system verify the effectiveness of the proposed method |
| Key words: reactive voltage partitioning transient voltage characteristics rapidity dynamism two-stage |
