"220KV变电站110KV出线保护自动化设计与整定计算"

The document titled "220kv变电站综合自动化-110kv第八回出线保护配置及整定计算(建筑电气毕业设计说明书论文100页).doc" provides a comprehensive overview of the design process for the 110KV output protection in a 220 KV substation. This design utilizes modern microcomputer protection principles and new setting methods for configuration. The main focus of the document is on the design process, principles, and methods involved in the output protection of the substation. The document starts by discussing the different forms of main connections, comparing their characteristics, advantages, and disadvantages, as well as the principles for selecting transformers. The calculation of short-circuit currents is emphasized as a crucial aspect. It covers the calculation of symmetrical and asymmetrical short circuits under different operating conditions, providing essential data for the selection, setting, and verification of high voltage electrical equipment. The selection and verification of electrical equipment are based on the results of symmetrical short-circuit calculations, particularly for circuit breakers and isolation switches. In the specialized section of the design, the document details the principles, methods, and validation of protection configuration, selection, and setting using the results of short-circuit calculations. It includes specific calculations and verifications for current-voltage protection reflecting phase-to-phase short circuits and current protection reflecting ground faults. Overall, the document highlights the importance of comprehensive automation, microcomputer protection, relay protection, setting, and verification in the design of a 220KV substation. It provides a detailed account of the design process and principles involved in ensuring the reliable operation and protection of the substation. Key words include comprehensive automation, microcomputer protection, relay protection, setting, and verification.