考虑电力系统规划的OPA模型及自组织临界特性分析

发布时间：2018-12-10 12:02

【摘要】：为便于对电网连锁故障进行研究,介绍了与电网升级演化的触发息息相关的电力系统发展诊断指标,在此基础上提出一种改进OPA模型。该模型在慢动态环节加入电网规划的作用,模拟负荷变化、发电厂新建扩容、变电站新建扩容、输电线路新建改造等较长时间尺度上的电网演化升级过程;在快动态环节充分考虑调度、继电保护等在连锁故障过程中采取的措施及发挥的作用,模拟由于线路开断或短路、发电机退出运行等故障引发的连锁故障。利用所提模型对河南开封商丘地区220 kV及以上主干电网进行仿真测试,在长时间尺度上模拟电网演化升级的过程,同时统计不同升级触发阈值下的故障规模分布,从而求得系统临界状态所对应的触发阈值。仿真结果表明,文中所提的考虑电力系统规划的OPA模型能够较好地模拟电网生长演化,反映连锁故障产生和传播的过程,对未来的电网建设及大停电的整体预防有一定指导意义。
[Abstract]:In order to study the cascading faults of power network, this paper introduces the diagnostic index of power system development, which is closely related to the trigger of power grid upgrading and evolution. Based on this, an improved OPA model is proposed. The model adds the function of power network planning in slow dynamic link, simulates the evolution and upgrading process of power network on a long time scale, such as load change, new expansion of power plant, new expansion of substation, new transformation of transmission line, and so on. In the fast dynamic link, the measures taken in the process of cascading fault, such as dispatch, relay protection, etc., are fully considered, and the cascading faults caused by the fault of line opening or short circuit and generator exiting operation are simulated. The proposed model is used to simulate and test the trunk power grid of 220 kV and above in Kaifeng, Henan Province. The process of power grid evolution and upgrading is simulated on a long scale, and the distribution of fault scale under different trigger thresholds is calculated. The trigger threshold corresponding to the critical state of the system is obtained. The simulation results show that the proposed OPA model, which takes power system planning into account, can well simulate the evolution of power network and reflect the process of generation and propagation of cascading faults. It has certain guiding significance for future power grid construction and overall prevention of power outages.
【作者单位】：电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);
【基金】：国家自然科学基金面上资助项目(51377091) 创新研究群体科学基金资助项目(51321005)~~
【分类号】：TM711

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