计及动作时序的电网在线快速主动解列策略计算  

Rapid Active Controlled Islanding Strategy Considering Action Sequence for Power Grid

作　　者：李宗翰 刘道伟 张东霞 孙华东 杨红英 赵岩 高松 赵高尚 LI Zonghan;LIU Daowei;ZHANG Dongxia;SUN Huadong;YANG Hongying;ZHAO Yan;GAO Song;ZHAO Gaoshang(China Electric Power Research Institute,Haidian District,Beijing 100192,China;State Grid Shandong Electric Power Research Institute,Jinan 250002,Shandong Province,China)

机构地区：[1]中国电力科学研究院有限公司,北京市海淀区100192 [2]国网山东省电力公司电力科学研究院,山东省济南市250002

出　　处：《中国电机工程学报》2021年第14期4740-4752,共13页Proceedings of the CSEE

基　　金：国家电网公司科技项目(5100-201955448A-0-0-00)。

摘　　要：失步解列是保障电力系统安全稳定运行的关键技术之一,但常规研究利用强假设对解列后的动态过程进行规避,其实际应用时面临解列失效风险。针对该问题,提出计及动作时序的电网在线快速主动解列策略。首先,基于两机失步振荡模型,分析2种不同场景下电压矢量变化特性,提取表征振荡中心漂移规律的几何特征,进而构建振荡中心定位判据,确定初选断面并搜索断面邻域;其次,基于暂态能量分析了动作时序对孤岛功角稳定性的影响,通过计算不同开断方式下线路开断引发的功率突变量,给出各断面的最佳动作时序,以满足解列后功角稳定性约束;依据孤岛稳定平衡点求解及不平衡功率最小原则,优选最终断面以保证解列后频率稳定恢复能力,最终实现解列控制在时间与空间上的协同,IEEE-9和IEEE-39节点系统仿真结果验证了所提策略的有效性。Controlled islanding is a key technology to ensure the safe and stable operation of power system. However, it has not been well studied since the existing methods are based on the snapshots before disturbance occurrence and do not consider dynamic process. In response to this deficiency, a rapid active controlled islanding strategy considering action sequence for power grid was proposed. The variation characteristics of buses’ voltage vector under two different scenarios was analyzed firstly in this paper based on double machine out-of-step oscillation model, and voltage vector geometric characteristics of oscillation center was extracted, representing the mechanism of oscillation center migration. And a locating criterion of oscillation center was proposed to search the primary section and the neighborhood section. Then the influence of action sequence on angle stability was analyzed based on the transient energy, and the optimal action sequence was given to satisfy the constraint of angle stability by calculating the power abrupt under different switching modes. Finally, the splitting section was selected to ensure the recovery ability of frequency stability according to the stable equilibrium point and the minimum unbalanced power, and the spatiotemporal cooperative splitting control was realized. The proposed strategy was validated using the IEEE-9 and the IEEE-39 system.

关 键 词：主动解列 振荡中心 暂态能量 动作时序 

分 类 号：TM712[电气工程—电力系统及自动化]