摘要
经过数学推导指出 ,对于两相短路接地故障 ,仅相间过渡电阻为零时原基于单侧信息的故障测距解方程算法方为有效。提出了输入项仅少量修改即可克服上述缺陷的修正算法 ,它与原算法数学表达形式极其相似 ,程序修正方便快捷。大量数字仿真及EMTP仿真计算表明修正算法可取得唯一区内真根。基于动态模拟试验数据的实例计算中修正算法误差 <2 %。
The problem that the old equation-solving fault location algorithm using one-terminal information for double phase-grounded fault is only correct when the phase-phase resistance is zero is pointed out after mathematical deduction. Based on mathematical discursion, a modified algorithm that makes a little change to the input items is put forward. The modified algorithm has similar mathematical expressions to the former one so that it is convenient to program. Plenty of digital simulation calculations and simulation calculations using EMTP electromagnetic transient program indicate that the true fault location can be determined by the modified algorithm. The exact answer in an example test based on physical simulation experiment data is also given. The error is <2%.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2004年第7期22-23,42,共3页
High Voltage Engineering
关键词
故障测距
算法
两相短路接地故障
fault location algorithm double phase-grounded fault
