| 引用本文: | 程维杰,任祖怡,刘金生,等.维持局部孤网稳定切换的网源荷分布式协调控制方法[J].电力系统保护与控制,2019,47(21):73-82.[点击复制] |
| CHENG Weijie,REN Zuyi,LIU Jinsheng,et al.Network-source-load distributed coordination control method for maintaining stable switching of local isolated networks[J].Power System Protection and Control,2019,47(21):73-82[点击复制] |
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| 摘要: |
| 由于土地、发电资源等条件的限制，现代大型城市主要由外部电网进行负荷供电，形成大型受端城市电网。大型受端城市电网与主系统解列后，功率不平衡会导致频率下降，甚至可能引发网络崩溃，维持其稳定切换以形成局部孤网供电具有重要的理论和现实意义。网源荷协调控制是维持局部孤网稳定切换的关键，然而，对于局部孤网，尤其是非计划形成的局部孤网，是较难实现集中式协调调控的。鉴于此，引入分布式多代理系统，提出一种无需集中控制器的网源荷分布式协调控制方法。有别于依赖集中控制器、且通信结构复杂的传统集中式控制方法，分布式协调控制在仅依靠相邻节点通信的状况下，通过改进的平均一致性算法获取电网运行全局参数，实现网源荷全局协调控制。该控制方法能够较好地适应网络结构变化，挖掘网源荷协调潜能。同时，提出的改进平均一致性算法具有更好的收敛性能，为局部孤网切换时的频率和电压控制提供快速全局数据支撑。基于PSCAD/EMTDC和Matlab仿真平台，在典型工况下对网源荷协调控制策略进行分析和验证，结果表明所提出的改进平均一致性算法和分布式网源荷协调控制方法能够维持局部孤网稳定切换。 |
| 关键词: 局部孤网 网源荷协调控制 分布式多代理系统 改进平均一致性算法 全局信息 |
| DOI：10.19783/j.cnki.pspc.181487 |
| 投稿时间：2018-11-07修订日期：2019-01-10 |
| 基金项目:国家自然科学基金项目资助(51607036) |
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| Network-source-load distributed coordination control method for maintaining stable switching of local isolated networks |
| CHENG Weijie,REN Zuyi,LIU Jinsheng,LI Na,YIN Minghui,ZHANG Junfang,LIU Wei |
| (Shenzhen Power Supply Bureau CO., LTD., Shenzhen 518000, China;Nanjing NR Electric CO., LTD., Nanjing 211102, China;Nanjing University of Science and Technology, Nanjing 210094, China) |
| Abstract: |
| Due to the limitations of land, power generation resources and other conditions, modern large-scale cities are mainly powered by external power grids, forming a large receiving end city power grid. After the large-scale urban power grid is disconnected from the main system, the power imbalance will lead to a decrease in frequency, which may even cause the network to collapse. It is of great theoretical and practical significance to maintain stable switching to form local isolated network power supply. Coordination control of network-source-load is the key to ensure stable switching of local isolated networks. However, it is difficult to realize centralized coordinated control for local isolated networks, especially for unplanned local isolated networks. In view of this, this paper introduces a distributed multi-agent system and proposes a distributed coordination control method of network-source-load without centralized controller. Apart from the traditional centralized control method which relies too much on the centralized controller and complex communication structure, the distributed coordination control obtains the global parameters of the grid operation through the improved average consistency algorithm under the condition of only relying on the communication of the adjacent nodes to realize the network-source-load global collaborative control. The proposed control method can adapt to the changes of network structure and tap the coordination potential of network-source-load. Meanwhile, the improved average consistency algorithm has better convergence performance, and provides fast global data support for frequency and voltage control of local isolated network switching. The network-source-load coordination control technology is analyzed and verified under typical working conditions based on PSCAD/EMTDC and Matlab simulation platforms. The results show that the proposed improved average consistency algorithm and distributed network-source-load coordination control method can guarantee the stable switching of local isolated networks. This work is supported by National Natural Science Foundation of China (No. 51607036). |
| Key words: local isolated network coordinated control of network-source-load distributed multi-agent system improved average consistency algorithm global information |
