摘要
提出了一种基于最小二乘矩阵束算法的矿井电网漏电保护新方法。该方法在附加直流源系统基础上,提取各支路零序电流信号,利用最小二乘矩阵束算法提取各支路零序电流信号的直流分量;根据提取出的各支路直流分量,计算各支路的对地绝缘电阻值;若某支路对地绝缘电阻值小于动作值,则判断该支路发生了漏电故障。仿真结果表明,该方法准确、可靠,适应性强。
A new leakage protection method was proposed which was based on least-square matrix algorithm.In the method,zero sequence current signal of each brance is extracted on the basis of additional DC source system,and DC component of the zero sequence current signal is extracted by the least-square matrix algorithm.According to the DC component,insulation resistance value of each branch is calculated.If the insulation resistance value of a branch is bigger than action resistance value,the branch is judged as fault branch.The simulation result shows the method is accurate,reliable and with high adaptability.
出处
《工矿自动化》
北大核心
2016年第2期47-51,共5页
Journal Of Mine Automation
基金
陕西省科技厅计划项目(2015GY049)
陕西省教育厅专项科研计划资助项目(2013JK0867)
关键词
矿井电网
漏电保护
附加直流源系统
最小二乘矩阵束算法
直流分量
绝缘电阻值
mine power network
leakage protection
additional DC source system
least square matrix algorithm
DC component
insulation resistance value
