某小区二次系统保护设计 毕业论文.docVIP

2013 届毕业设计说明书 某小区二次系统保护 系 、 部： 电气与信息工程系 学生姓名： 胡 玉 明 指导教师： 曹志平 职称 讲师 专 业： 电气自动化技术 班 级： 电气1001班 完成时间： 2013-5-24 摘 要 随着国民经济的不断提高，城市化的步伐正在加快。不仅是目前的城市，还是社会主义新农村，由经过专业人士设计的居民小区环境优美，公共设施齐全，各地小区的建设可谓是蒸蒸日上，如火如荼。电是现代人生活不可离开的一部分，那么小区供电质量直接影响着居民的日常生活。所以作为一名有志于成为一名电力工作人员的人，应该针对电力供应的各个环节，不断的学习模拟，提高专业水平。 本文设计的是《某小区二次供电系统保护》，是对小区二次电力供电系统进行检测与保护。本设计主要是对一“居民小区”，全系去总面积约34000平方米。对小区内的居民楼和小区内的各用电设施及地下停车场进行一个供电的二次系统保护。保护内容主要包括：系统的过电流保护，继电器保护，电流速断保护，电流负荷保护，电测量仪表与绝缘式装置选择，互感器的应用与互感器的选择，高压断路器的控制和信号回路的选择，二次回路操作电源的选择，小区变电配电所的操作电源的选择。中央控制信号装置选择，以及小区的防雷措施。 关键字：继电保护；过流保护；互感器  Abstract As the national economy continues to improve, the pace of urbanization is accelerating. Not only is the city, or a new socialist countryside, designed by a professional residential area beautiful environment, public facilities, residential building can be described throughout thriving in full swing. Electricity is part of modern life can not leave, then the cell directly affects the quality of power supply daily life of residents. Therefore, as an aspiring to become an officer of the electrical work, should address all aspects of the power supply, continuous learning simulations to improve professional standards. This design is a district secondary power system protection is a secondary power supply system for cell detection and protection. This design is a residential area, the whole system to a total area of ??approximately 34,000 square meters. Residential buildings within the district and the district of the electrical facilities and underground parking for a secondary power system protection. Protection should include: over-current protection system, the relay protection, current protection, current overload protection, electrical measuring instruments and devices selected insulation, transformers and transformer selection of applications, high voltage circuit breaker control and signal circ