"220KV变电站综合自动化--110KV出线保护配置与整定计算研究"

The 100-page graduate thesis titled "Comprehensive Automation of 220kV Substation - Configuration and Setting Calculation of 110kV Eighth Outgoing Line Protection" focuses on the design process, principles, and methods of the 110kV outgoing line protection in the comprehensive automation of the 220kV substation. The thesis utilizes the widely adopted principles of microcomputer protection and new methods of setting calculation for the configuration. It also covers the selection and principles of the main busbar, as well as the calculation of symmetrical and asymmetrical short-circuit currents. In the foundational section, the thesis discusses the different forms of main busbars, compares their characteristics and advantages and disadvantages, and outlines the principles for selecting transformers. The section on short-circuit currents is crucial, as it provides information on the calculation of symmetrical and asymmetrical short-circuit currents under different operating conditions, which is essential for the selection, setting, and validation of high-voltage electrical equipment. The specialized section of the thesis delves into the selection, setting, and validation principles and methods for relay protection, using the results of short-circuit calculations. This includes detailed discussions on the setting calculation and validation of current-voltage protection for phase-to-phase short circuits and the setting and validation of zero-sequence current protection for ground faults. The keywords of the thesis include comprehensive automation, microcomputer protection, relay protection, and setting and validation. This thesis provides a comprehensive overview of the design process and principles for the 110kV outgoing line protection in the comprehensive automation of the 220kV substation, making it a valuable resource for professionals and researchers in the field of electrical engineering and substation automation.