Xây dựng thuật toán rơle bảo vệ khoảng cách sử dụng đặc tuyến khởi động MHO để bảo vệ đường dây truyền tải điện

• Tác giả: Đức Hoàn Huỳnh, Minh Khoa Ngô, Xuâ Khoa Trần
• Ngôn ngữ: vie
• Ký hiệu phân loại: 621.31 Generation, modification, storage, transmission of electric power
• Thông tin xuất bản: Khoa học (Đại học Quy Nhơn), 2015
• Mô tả vật lý: 97-104
• Bộ sưu tập: Metadata
• ID: 555934

Tóm tắt

This paper proposes an algorithm of distance protection using MHO characteristic to protect the power transmission lines. Current and voltage signals at protection location are sampled and converted from analog to digital signals, then the Fourier transform method is used to transform the signals in order to determine complex impedance at protection location when a fault occurs in the line. The complex impedance will be compared with the impedance settings of protection zones according to MHO characteristics to detect faults of any zones and send a trip signal to circuit breaker corresponding to the zone's time. This paper uses a line model with a supply source that is modeled in Matlab/Simulink to verify the effectiveness of the proposed algorithm. The simulation results show the effectiveness and ability of accurate impact of the relay when faults occur at any locations on transmission lines.