交直流混联电网稳定控制系统通信可靠性研究  

Research on Communication Reliability of Stability Control System in ACDC Hybrid Power Grid

作　　者：任祖怡[1] 邱建[2] 徐光虎[2] 张建新[2] 刘志[1] 杨贵[1] 王鹏翔[1] REN Zuyi;QIU Jian;XU Guanghu;ZHANG Jianxin;LIU Zhi;YANG Gui;WANG Pengxiang(NR Electric Co.,Ltd.,Nanjing 211102,China;Power Dispatching and Control Center,CSG,Guangzhou 510663,China)

机构地区：[1]南京南瑞继保电气有限公司,南京211102 [2]中国南方电网电力调度控制中心,广州510663

出　　处：《南方电网技术》2023年第6期11-17,共7页Southern Power System Technology

基　　金：国家重点研发计划资助项目(2021YFB2400800);中国南方电网有限责任公司重点科技项目(000000KK52210139)。

摘　　要：南方电网已经形成了以“远距离、大容量、交直流互联且强直弱交”为特点的交直流混联复杂大电网,电网的安全稳定问题越来越突出,因此需要建设大规模稳定控制系统来确保电网安全稳定运行。现有的稳定控制系统通信架构简单,通信协议透明、可靠性和安全性不高,抗干扰能力弱,无法满足交直流混联电网稳定控制系统的高可靠性和高安全性要求。因此提出了通信帧再编码、通信识别码唯一性认证、循环自增计数校验等新技术,提高了稳定控制系统站间通信可靠性;提出了基于在线监测命令的自检技术,有效地检测出大规模稳定控制系统的隐性缺陷,大大提高了系统通信的整体可靠性;提出了一种DES加密算法应用于站间交互数据加密,确保了稳定控制系统的通信安全。实验验证和现场应用表明提出新技术较大提升了稳控系统的可靠性和安全性。A complex and large AC-DC hybrid power grid has been built by China Southern Power Grid,which characterized by long distance,large capacity,AC-DC interconnected,and strong DC with weak AC.The problem of security and stability of power grid is becoming more and more serious,so it is necessary to build a large-scale power stability control system to ensure the safe and stable operation of the power grid.However,the existing power stability control system has the shortcomings of simple com⁃munication architecture,transparent communication protocol,low dependability and security,and weak anti-interference capability.Therefore,it cannot meet the requirements of high dependability and security in power stability control system for AC-DC hybrid power grid.In this paper,new technologies of communication frame recoding,unique authentication of communication identifica⁃tion code and verification of cyclic increasing counter are presented,which improve the reliability of communication between sta⁃tions in power stability control system.A self-inspection technology based on online monitoring command is also presented,which effectively detects the hidden defects of large-scale stability control system and greatly improves the overall reliability of the whole system communication.Finally,a data encryption standard(DES)encryption algorithm is applied to encrypt interactive data between stations to ensure the communication security of the power stability control system.Experimental verification and field ap⁃plication show that the proposed new technologies significantly improve the reliability and security of the power stability control system.

关 键 词：电网稳定控制系统 站间通信 通信可靠性 DES加密算法 

分 类 号：TM712[电气工程—电力系统及自动化] TM762