变压器零序过流保护整定计算软件的开发

Study on Coordination Software of Transformer Zero-sequence Over-current Relay

对变压器零序环流问题、保护配合的死锁问题、定值优化以及变压器零序过流保护整定计算软件的通用性进行了研究,明确了变压器零序环流的方向,提出了有效的解锁方法和最优配合段整定的定值优化方法,并在对各地整定原则分析归纳的基础上,采用原则可选的方法实现软件通用性。实际应用表明,基于以上研究成果开发的整定计算软件能够满足各地对变压器零序过流保护自动整定计算的需求。

This paper researched on zero-sequence circle current,deadlock between transformer zero-sequence over-current relays,optimization of coordination results and universality of coordination software.The direction of zero-sequence circle current was definitely analyzed.Valid methods breaking the deadlocks and a method for optimization of coordination results are put forward.Based on induction of the coordination principles,universality of software is realized by optional principles.It is proved that the coordination software based on above achievements can meet the requirements of auto-coordination of transformer zero-sequence over-current relay in different areas.