Study on Optimal Phase Arrangement Considering the Characteristics of Inductive Interference from Overhead Transmission Lines

가공송전선 유도장해 특성을 고려한 최적 상배열 연구

Abstract

The domestic overhead transmission lines use a vertical configuration and reverse phase arrangement, but when there is a limitation in steel tower height because the transmission lines pass a height limit zone or special zone, an application of triangular arrangement is necessary, and a study on the optimal phase arrangement to minimize inductive interference for this is necessary. If conductor arrangement are changed, the action of electrostatic induction and electromagnetic induction becomes different from before changes, so the changed conductor arrangement should be reviewed in terms of inductive interference. So this paper presents an optimal phase arrangement to reduce inductive interference by calculating electrostatic induction and electromagnetic induction according to conductor arrangement.

그림 1 선전하에 의한 지표면전계강도 Fig. 1 Electric field at ground caused by a line charge

그림 2 송전선 정상운전시 전선배열 Fig. 2 Line configuration for steady state

그림 3 345 kV 수직배열 모델[15] Fig. 3 Line configuration of 345 kV vertical model

그림 4 345 kV 삼각배열 모델 Fig. 4 Line configuration of 345 kV triangular model

그림 5 페이서 선도 Fig. 5 Phasor diagram

그림 6 345 kV 수직배열 지표면 전계강도 Fig. 6 Electric field profile at ground level for 345 kV vertical arrangement

그림 7 345 kV 삼각배열 지표면 전계강도 Fig. 7 Electric field profile at ground level for 345 kV triangular arrangement

그림 8 345kV 삼각배열 지표면 전계강도(정상배치) Fig. 8 Electric field profile for 345 kV triangular arrangement at normal phase

표 1 검토대상 상배열 조합 Table 1 Combination of phase arrangements to be reviewed

표 2 검토대상 상배열 조합(정상배치) Table 2 Combination of normal phase arrangements to be reviewed.

표 3 가공지선 유도전류 Table 3 Induce current of ground wire comparing with line current