大规模互联电网关键节点识别与应对策略研究
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国家电网有限公司科技项目(5229DK17000L)


Research on identification method of critical node and countermeasures in largescale interconnected power grids
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    摘要:

    随着电力系统的不断发展,大规模互联电网在极大提高能源资源配置的同时,也给电力系统同步运行带来了新的问题。大电网局部故障可能传播至整个网络,导致电力系统连锁故障的发生,而电力系统连锁故障一般伴随着线路有功功率的大规模转移。鉴于此,针对节点移除后的电网潮流转移情况,给出节点潮流转移度的概念;考虑到节点移除后可能会造成系统不连通的现象,提出节点位置重要度的概念;同时,基于此2个指标, 并借用电气耦合连接度的概念,结合多属性决策方法给出关键节点综合性指标的排序方法。最后,通过对特定网络结构制定薄弱节点分裂运行的主动防御策略,防止连锁故障发生或抑制连锁故障大规模传播。针对华中电网某省系统,应用该文所提识别方法和主动防御方案,仿真结果验证了该方法和策略的有效性。

    Abstract:

    With the continuous development of the power system, the largescale interconnected power grid has greatly increased the allocation of energy resources, but also brought new problems to the synchronous operation of the power system on the mean time. Partial failures of large power grids may spread to the entire network, leading to cascading failures in the power system, which are generally accompanied by largescale transfer of line active power. In view of this, aiming at the power flow transfer situation after the node is removed, this paper gives the concept of node power flow transfer degree. Considering that the node removal may cause the system to be disconnected, the concept of node position importance is also proposed. Meanwhile, based on these two indicators, and borrowing the concept of electrical coupling connectivity, combining with multiattribute decisionmaking method leads to the ranking method of key node comprehensive indicators. Finally, this paper prevents the occurrence of cascading failures or inhibit the largescale propagation of cascading failures by formulating an active defense strategy for the weak node split operation for a specific network structure. For a provincial system in Central China Power Grid, the identification method and active defense scheme mentioned in this paper are applied. The results show the effectiveness of the method and scheme.

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刘海涛,牛 健,刘 兵,张 顺.大规模互联电网关键节点识别与应对策略研究[J].电力科学与技术学报,2020,35(4):114-121. LIU Haitao, NIU Jian, LIU Bing, ZHANG Shun. Research on identification method of critical node and countermeasures in largescale interconnected power grids[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2020,35(4):114-121.

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  • 在线发布日期: 2020-09-04