| Most failures in electric power system were caused by lightning,so it can more easily resist on the harm caused by lightning if we have researched the characteristic of the lightning. It used flexible Rogowisk coils as current transducer and used CT as power supply. It also used GPRS technique for communication. The lightning online monitor system with multi-chanels were researched. It gathe the current data of lightning from three phase conductor,grouded wire and the 1/4 part of the tower. It The measurement range of the system also evaluated by the soft-ware of PSCAD/EMTDC for the fulture works.It researched a power supply system by CT for the fulture work at lastThe result of test in the laboratory showed that the system had a high precision and a EMC charateristic. It has been used in Chengde 220kV transmission line project. |
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