藏中电网系统级动态协调控制方案研究  

Research on System-Level Dynamic Coordinated Control Scheme for Central Tibetan Grid

作　　者：岳雷 薛安成 贺庆 孟洪民 于强 崔洁豪 毕天姝 杨奇逊 YUE Lei;XUE Ancheng;HE Qing;MENG Hongming;YU Qiang;CUI Jiehao;BI Tianshu;YANG Qixun(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Source（North China Electric Power University）,Changping District,Beijing 102206,China;China Electric Power Research Institute,Haidian District,Beijing 100192,China;Global Energy Interconnection Development Cooperation Organization,Xicheng District,Beijing 100032,China;State Grid Information and Telecommunication Group,Changping District,Beijing 102211,China;State Grid Electric Vehicle Service Co.,Ltd.,Xicheng District,Beijing 100032,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]中国电力科学研究院有限公司,北京市海淀区100192 [3]全球能源互联网发展合作组织,北京市西城区100032 [4]国网信息通信产业集团有限公司,北京市昌平区102211 [5]国网电动汽车服务有限公司,北京市西城区100032

出　　处：《电网技术》2018年第10期3323-3329,共7页Power System Technology

基　　金：国家自然科学基金国家重大科研仪器研制项目(51627811,51725702)~~

摘　　要：藏中电网因其特殊的地理环境约束,具备典型的＂大机小网＂和＂大直流、小系统、弱送受端＂特性。此外,随着光伏等高随机性新能源比重的增加,频率稳定问题已成为系统主要运行风险。基于藏中电网模型,分别分析藏中电网在典型故障下的频率稳定特性,以及藏中电网内发电机组调速器参数对系统频率稳定性的影响。基于分析结果,针对藏中电网跳机故障,设计系统级协调控制系统方案,提出调速器在线PID参数优化调整、直流调制与切负荷相结合的藏中电网频率协调控制策略,对藏中电网的安全生产运行具有较好的实际指导价值。Due to special restrictions of geographic environment in Tibet, Central Tibetan Grid has classical characteristics called ＂large turbine and small system＂ and ＂large-capacity DC, small system and weak sending/receiving ends＂. In addition, with increase of photovoltaic power with high randomness, system frequency stabilization problem becomes a main operating risk. Based on the model of Central Tibetan Grid, this paper analyzes the frequency characteristics under classical system faults and effects on frequency stability caused by changing hydrogovernor controller parameters. Finally, based on the analysis, a system-level coordinated control scheme is designed, and a coordinated strategy to improve frequency stability is proposed, including optimization of governor online PID parameters, HVDC modulation and load shedding. The analysis and coordinated strategy are beneficial to system safe operation in practice.

关 键 词：频率稳定性 水轮机调速器 PID参数 高压直流调制 切负荷 协调控制 

分 类 号：TM721[电气工程—电力系统及自动化]