CAJ | 학술논문

为了解决变压器电源侧相间后备保护灵敏度不满足要求，特别是低压侧加装限流电抗器时的后备保护问题，拟用变压器高中压侧CT构成的和电流保护，其原理、构成、整定与传统过流保护均有不同，值得尽快研究、开发、使用。本文认为，和电流保护能显著提高灵敏度，应该成为标准配置，该保护CT应采用三角形接线，用微机型装置实现，其整定应以单变运行为计算条件。
위료해결변압기전원측상간후비보호령민도불만족요구，특별시저압측가장한류전항기시적후비보호문제，의용변압기고중압측CT구성적화전류보호，기원리、구성、정정여전통과류보호균유불동，치득진쾌연구、개발、사용。본문인위，화전류보호능현저제고령민도，응해성위표준배치，해보호CT응채용삼각형접선，용미궤형장치실현，기정정응이단변운행위계산조건。
To solve the problems on sensitivity of phase to phase backup protection on transformer’s power supply side, especially the problems on the backup protection on the conditions of a current limit reactor applied on the LV side, a sum current protection formed by CT on HV and MV sides on transformer is proposed. Its principle, construction and setting way are different from the traditional overcurrent protections. In the author’s view, the sum current protection would improve the sensitivity considerably and should make it be a standard arrangement. Its CT should be delta wired realized by microprocessor based device. Its setting should be done based on single transformer operation.