基于有功潮流介数的电网关键线路辨识

发布时间：2018-06-24 11:23

本文选题：关键线路辨识 + 有功潮流介数　；参考：《电网技术》2016年01期

【摘要】：关键线路辨识是电力系统运行风险控制的重要环节。为提高辨识准确性,提出了基于有功潮流介数指标进行关键线路辨识的方法。该方法在传统电气介数指标基础上,结合电网实际潮流分布与线路输电容量的影响,物理背景更加符合电力系统实际。同时,提出了系统输电效率指标,利用关键线路连锁故障下的系统输电效率变化进行有效性校验;并分析了分布式电源的接入对电网关键线路辨识的影响。IEEE 39节点系统算例表明:少数有功潮流介数较高的线路在电网的功率传输中起着至关重要的作用,针对这些线路的连续攻击可导致潮流传输水平急剧下降,从而证明了利用有功潮流介数进行电网关键线路辨识的有效性。分布式电源接入(distributed generation,DG)的算例表明:DG的接入改善了局部电能供求关系,与之相关的重要联络线路的关键作用会减弱,关键线路辨识的结果会受到系统运行方式变化的影响。
[Abstract]:Key line identification is an important part of power system operation risk control. In order to improve the accuracy of identification, a method of key line identification based on active power flow index is proposed. The physical background of this method is more in line with the actual power system, based on the traditional electrical medium index, combined with the influence of the actual power flow distribution and the transmission capacity of the transmission line. At the same time, the index of system transmission efficiency is put forward, and the efficiency of transmission is checked by the change of transmission efficiency under the key line cascading fault. An example of IEEE 39-bus system shows that a few lines with high active power flow play an important role in power transmission. Continuous attacks on these lines can lead to a sharp decline in the power flow transmission level, thus proving the effectiveness of using active power flow vectors to identify key lines in the power network. An example of distributed generation DG shows that the connection of the distributed DG improves the local power supply and demand relationship, and the key role of the related important connection lines will be weakened, and the key line identification results will be affected by the change of the system operation mode.
【作者单位】：三峡大学电气与新能源学院;
【基金】：国家自然科学基金项目(51307097)~~
【分类号】：TM732

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