继电器在电力系统中应用的设计--毕业论文.docVIP

继电器在电力系统中应用的设计 摘要 在国家加大基础设施建设力度的大背景之下，对作为基础能源部门的电力部门，建设力度也得到不断加强。随着国民经济的不断发展，对电力的需求越来越大，电力供应开始出现紧张，在很多地方出现了供电危机，使其不得不采取限电、停电等措施，以缓解电力供应的紧张局面。因而，加强电力系统的安全保护及其应用与发展至关重要，继电器对电力系统的保护有着重大意义。因此，加大变配电站（所）电气保护系统研发力度，提高其安全保护能力，可以最大限度地减少停电故障发生时间，提高变配电站（所）的平均无故障运行时间，提高变配电站（所）供电可靠性。 随着输变电技术的日臻完善，电力系统变得更加巨大和庞杂，对变配电站（所）的运行保障能力要求也越来越高，各类用户对电力供应的可靠性要求也越来越高。变配电站（所）安全保护系统必须能够实现当变配电站（所）运行过程中发生三相短路、两相短路、单相接地等故障，以及出现过负荷、过电压、低电压、低周波、瓦斯、超温、控制与测量回路断线等不正常现象时，能够快速反应 ，实现选择性发出跳闸命令将故障切除或发出报警，从而减少故障造成的停电范围，减轻对电气设备造成的破坏，确保电力系统安全、稳定运行。 关键词：继电器、主保护、母线保护、继电保护、输电线路保护、距离保护 Design and application of relay in electric power system Abstract Under the background of national infrastructure construction, as of the power sector based energy sector, construction has been strengthened. With the continuous development of the national economy, growing demand for electricity, power supply began to appear nervous, in many places appeared the power supply crisis, to take power brownouts, power outages and other measures to alleviate the tense situation on the power supply. Therefore, to strengthen the safety and its application and development is essential to the protection of power system, is of great significance to the electrical power system relay protection. Therefore, increase the transformer substation and power distribution station) electrical protection system research and development efforts, improve the safety protection ability, can maximally reduce outage time, improve the power transformer and distribution station of (the) average failure free operation time, improve the power transformer and distribution station of (the) power supply reliability. With the gradual improvement of the technological transformation, power system become larger and more complex, of substation and power distribution station operation support capability requirements are also getting higher and higher, all types of users of electricity supply reliability requirements are also getting higher and higher. Substation and power