基于稳控技术的源网荷友好互动精准负荷控制系统

摘要

Emergency load shedding when serious HVDC transmission fault happens are necessary measures to prevent frequency drop of receiving-side power network. Combined with the characteristics of the stability control and marketing load control, it proposes a load control system using the load which can be interrupted as the object of precise control. It compares advantages and disadvantages of the load control by stability control device and load control by the marketing system and then introduces the overall architecture of precise load control system. It focus on the functional position of the system, load control principle and prevention for system malfunction and rejection. The precise load control system proposed in this paper has been completed and put into operation in Jiangsu Power Grid, which realizes accurate control of 3. 5 million kilowatt per second and emergency control capability of 1 million kilowatt per millisecond.%特高压直流严重故障时的紧急切负荷措施是阻止受端电网频率跌落的必要手段。结合稳控和营销负控系统特点，本文提出了以企业可中断负荷为精准控制对象的负荷控制系统。比较分析了稳控装置负荷控制与营销系统负荷控制方式的优缺点，介绍了精准负荷控制系统的整体架构，其中重点阐述了系统各层级功能定位、负荷控制原则和防止系统误动与拒动等关键技术。本文提出的精准负荷控制系统已在江苏电网建成投运，实现了350万千瓦秒级精准实时控制和100万千瓦毫秒级紧急控制能力。