| Title |
Parameter Selection of the Saturable Reactor for Removing Ferroresonance of 362kV Gas VT Using EMTP |
| Authors |
최재구(Choi, Jae-Gu) ; 김익수(Kim, Ik-Soo) ; 박경원(Park, Kyoung-Won) ; 송희석(Song, Hee-Suk) |
| Keywords |
VT ; ferroresonance ; EMTP ; saturable reactor |
| Abstract |
Recently, the construction of gas insulated substation(GIS)s has been increased in Korea. But, the whole quantity of the VTs which were used in GIS has been imported. Under the circumstance that SF_6 gas power apparatus are being developed up to 800kV rating in Korea, the development of EＨＶ SF_6 gas VT is essential for localizing the power apparatus. As for EHV VT, destructive ferroresonance can be generated due to the combination of capacitiances between poles of circuit breaker, ground capacitance of bus and nonlinear excitation property of VT core. But the theoretical analysis about ferroresonance has not been fully achieved in Korea. Therefore, in this paper the authors would like to contribute for localizing EHV SF_6 gas VT by developing the diagram of ferroresonance zone according to the parameters of the circuit and the saturable reactor. |