摘要
紧急切负荷是避免暂态失稳、保持频率稳定的重要技术手段之一。常规的精准切负荷方案未考虑配电网自身现有的故障紧急处理机制以及协同控制,仅将配电终端或负控终端作为主网稳定控制装置实施精准切负荷方案的最终执行机构。主配协同的配电网紧急负荷控制策略通过智能配电终端与稳定控制装置的协同互动,将负荷控制的基本单元由高压站出线延伸至配电网中低压分支线路,从而提高负荷控制精度,避免切除敏感及重要用户。结合配电网本地侧的分布式馈线自动化和低压低频减载控制,研制面向负荷控制的智能配电终端,以提高配电网在故障快速切除及自愈、紧急切负荷、自动减载解列等各个不同控制阶段的一体化负荷管控能力。通过仿真算例及工程示范应用验证了所提控制方法的有效性。
Emergency load shedding is an important technical means to avoid transient instability and maintain frequency stability.The conventional accurate load shedding scheme does not consider the existing fault emergency treatment mechanism and collaborative control of the distribution network itself,and only takes the distribution terminal or load control terminal as the final actuator of the main grid stability control device to implement the precise load shedding scheme.The emergency load control strategy of distribution network based on collaboration of main grid and distribution network extends deployment of the basic units of load control from high-voltage station outgoing line to medium-and low-voltage branch line of distribution network through collaborative interaction between intelligent distribution terminals and stability control devices,so as to improve load control accuracy and avoid cutting off sensitive and important users.Combined with the distributed feeder automation and low-voltage and low-frequency load shedding control on the local side of the distribution network,an intelligent distribution terminal for load control is developed to improve the integrated load management and control ability of the distribution network in different control stages,such as rapid fault removal and self-healing,emergency load shedding,automatic load shedding and splitting.The effectiveness of the proposed control method is verified by simulation examples and engineering demonstration applications.
作者
胡国
颜云松
吴海
金鹏
HU Guo;YAN Yunsong;WU Hai;JIN Peng(State Key Laboratory of Smart Grid Protection and Control,Nanjing 211106,China;Nari Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;NARI Technology Development Co.,Ltd.,Nanjing 211106,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2022年第2期180-187,共8页
Automation of Electric Power Systems
基金
中国南方电网有限责任公司科技项目(090000KK52170077)。
关键词
配电网
负荷控制
主配协同
配电终端
稳定控制装置
distribution network
load control
collaboration of main grid and distribution network
distribution terminal
stability control device
