直流系统附加频率控制器对AGC系统控制影响分析  

The Influence of UHVDC Additional Frequency Controller on Automatic Generation Control

作　　者：伍凌云 何笠 肖雄 谈超 陈钢 周林 WU Lingyun;HE Li;XIAO Xiong;TAN Chao;CHEN Gang;ZHOU Lin(Southwest Branch of State Grid Corporation of China,Chengdu 610041,China;State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Beijing 100192,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;NARI Technology Co.,Ltd.,Nanjing 221106,China)

机构地区：[1]国家电网有限公司西南分部,四川成都610041 [2]电网安全与节能国家重点实验室(中国电力科学研究院有限公司),北京100192 [3]南瑞集团有限公司(国网电力科学研究院有限公司),江苏南京211106 [4]国电南瑞科技股份有限公司,江苏南京211106

出　　处：《中国电力》2021年第8期68-74,共7页Electric Power

基　　金：国家电网有限公司科技项目(异步互联方式下西南电网跨层级多区域频率协调控制关键技术研究与应用,5108-201926029A)。

摘　　要：区域电网采用特高压直流异步方式联网后,现有的自动发电控制(AGC)系统控制策略对异步联网电网的特高压直流频率控制(FC)的适应性问题已显现。为分析直流频率控制对AGC系统控制效果带来的影响,采用直流FC和AGC的准稳态模型分析了其交互作用的机理;基于电力系统全过程动态仿真程序(PSD-FDS)进行直流FC与AGC控制的动态过程仿真,在时域与频域内进一步分析了直流FC控制对电网AGC控制影响过程,提出了AGC控制策略优化建议。分析表明,直流FC的投入能够减轻频率的波动幅值,但是在严重故障下的功率缺失却需要AGC来承担;而在联络线频率偏差控制模式下,也需要考虑AGC与直流FC协调配合来避免AGC在故障下反向调节和频率恢复缓慢的问题。The asynchronous interconnection of UHVDC in regional power grid has brought about the adaption problem of automatic generator control(AGC)strategy to UHVDC frequency control(FC).In order to analyze the influence of FC equipped in UHVDC on the AGC,the quasi-steady models of FC and AGC are used to find out the interaction mechanism between AGC and FC system.The power system full dynamic simulation(PSD-FDS)platform developed by China Electric Power Research Institute(EPRI)is applied to simulate the dynamic process of FC and AGC,and further analysis is made on the influence of FC on AGC both in the time domain and frequency domain,and some suggestions are proposed on optimization of the AGC strategy.The analysis results show that the fluctuation of frequency can be alleviated when FC is used,but the power loss of power systems needs to be compensated by AGC when serious fault occurs,it needs to be considered under the TBC mode that coordination of FC and AGC is set up to avoid the problems of AGC in re-regulation and slow recovery of frequency during serious faults.

关 键 词：特高压直流 异步联网 AGC 直流系统及附加频率控制器 PSD-FDS 

分 类 号：TM721.1[电气工程—电力系统及自动化]