基于IEC 61850的配电网网络化保护通信建模与实时性可靠性分析

将IEC 61850标准应用于配电网保护领域,研究配电网网络化保护技术,成为配电网发展的新热点。然而,配电网网络化保护面临着通信距离长、范围大、面向多个站点等苛刻的通信条件,通信的实时性和可靠性受到严峻的考验,亟需得到定量化的分析和论证。为此,基于IEC61850标准,依托OPNET仿真平台,对配电网网络化保护通信的报文信息以及实体设备进行自定义建模,并结合通信组网方案、设备选型以及采样策略,搭建了多个不同场景的配电网网络化保护通信仿真模型。仿真探讨了通信网络的延时、延时抖动性、丢包率等网络性能,定量化分析和论证了通信网络的实时性和可靠性。最后还探讨了配电网网络化保护通信的应用边界。基于OPNET的配电网网络化保护通信实时性和可靠性的研究方法和分析结果,能够为配电网网络化保护的工程化应用提供重要的参考意义。

Modeling and real-time reliability analysis of communication network for networked protection of distribution network based on IEC 61850

Researching networked protection technology of distribution network based on IEC 61850 has become a new hot spot in the development of distribution network. However, the networked protection of the distribution network faces the communication distances, large scope, and harsh communication conditions for multiple sites. The real-time and reliability of communication are challenged severely, and it is urgent to be analyzed and demonstrated quantitatively. Therefore, based on the IEC 61850 standard and relying on the OPNET simulation platform, the message and equipment of networked protection communication system are modeled, and the simulation model in different scenarios is built combined with communication networking scheme, equipment selection and sampling strategy. The performance of communication network such as delay, delay jitter and packet loss rate are collected to quantitatively analyze and demonstrate the real-time and reliability of the communication network. Finally, the application boundary of the communication network is also discussed. The real-time and reliability research methods and analysis results based on OPNET can provide an important reference for the engineering application of networked protection of distribution network. This work is supported by National Natural Science Foundation of China (No. 51577073).