摘要
简单介绍了传统的突变量距离保护原理,指出了其存在的不足,并在此基础上提出了新型突变量距离保护算法。新算法采用更为精确的分布参数模型计算补偿电压的突变量,从原理上解决了非周期分量对于突变量距离保护的影响,提高了区外故障时保护的安全性。详细分析了非周期分量的频谱特性,并验证了新算法对于非周期分量的适应性。EMTP仿真验证了所提出算法的正确性和实用性。
First,the principle of traditional industrial frequency variation distance protection is introduced and its deficiencies are pointed out.Based on the previous analysis,a new scheme of industrial frequency variation distance protection is put forward.A more accurate distributed parameter model is used in new algorithm to calculate the fault component of compensation voltage.Comparing with traditional algorithm,it makes the new algorithm less influenced by system source impedance and load,so that it also greatly improves the protection sensitivity.The spectral characteristics of the aperiodic components are analyzed in detail,and adaptation of the new algorithm to aperiodic components is proved as well.Simulation results with EMTP verify its validity and utility.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第20期78-80,87,共4页
Automation of Electric Power Systems
关键词
距离保护
灵敏度
补偿电压
分布参数模型
工频变化量
故障分量
distance protection
sensitivity
compensation voltage
distributed parameter model
power frequency variation
fault component
