摘要
为了研究基于暂态短路电流的高压输电线路的保护算法,采用Prony算法对IEEE30节点模型的短路电流进行了分析。Prony算法是使用指数函数的线性组合来描述等间距采样的数学模型,可以提取出信号的幅值、相位、衰减系数、频率、能量等信息。理论分析及仿真实验表明该方法能够在短时间内准确识别单相接地故障所产生的衰减的高频分量,其值比稳态时大很多倍,且存在一定的规律,所以由此特性来构成新型的保护原理,能提高保护动作的准确性。
In order to research on the transient short circuit current protection algorithm of high voltage （ HV } transmission line, this paper used the Prony algorithm model of nodes to IEEE30 short-circuit current. Prony algorithm is using the linear combination of exponential function to describe the mathematical model of the sampling space, the signal amplitude, phase, attenuation coefficient, frequency, energy and other information can be extracted. Theoretical analysis and simulation results show that in the short time, the method can accurately identify the attenuation of high frequency components generated by the phase-to-ground fault, and this value has many times greater than the steady state, and there is a certain law. Therefore using this characteristic to build into new protection principle, can improve the accuracy of protection operation.
出处
《电气自动化》
2013年第2期40-42,共3页
Electrical Automation
基金
国家自然科学基金资助项目(51010105064)
自治区基金(2011211A016)
博士基金(BS100122)
关键词
故障暂态
继电保护
动态仿真
高频分量
fault transient
relay protection
dynamic simulation
high frequency components
