摘要
针对复杂电网发生多重故障时的电压暂降问题,提出一种新的分析方法。该方法将所有故障点视为虚拟节点并引入多重故障点位置参数。通过计算虚拟节点与非故障节点、虚拟节点之间的互阻抗和自阻抗,将节点阻抗方程进行扩展。结合各故障点的故障边界条件计算得到各故障电流相量,进而推导出电网中任意节点故障电压相量关于多重故障位置参数的函数,最后结合阀值电压进行电压暂降分析。在标准IEEE 30节点系统中验证所提出的电压暂降分析方法的有效性。
According to the voltage dip situation for multiple faults case in complex power grid a novel analysis method was proposed. This method regarded all fault points as virtual buses and introduced multiple fault location parameters into voltage dip analysis. The bus impedance equation was extended by calculating the mutual impedance and self impedance between virtual bus and non-fault bus, one virtual bus and another. Each fault current phasor was calculated according to the faults boundary conditions. The fault voltage function of any bus on the multiple fault location parameters in the power grid was derived. The voltage dip analysis result was obtained associated with the voltage dip threshold value. The validity of the proposed voltage dip analysis method was proved in the standard IEEE 30-bus system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第7期101-106,197,共6页
Proceedings of the CSEE
基金
武汉大学博士研究生科研自主基金项目(20102070101000081)
Project Supported by PhD Independent Research Fund of Wuhan University(20102070101000081)
关键词
电能质量
多重故障
复杂电网
电压暂降
暂
降域
power quality
multiple faults
complex powergrid
voltage dips
area of vulnerability
