KV变电站一次系统附继电保护设计.docVIP

本科毕业设计说明书 35kV变电站一次系统及继电保护设计 THE DESIGN OF 35kV SUBSTATION AND RELAT PROTRCTION AT A TIME 35kV变电站一次系统及继电保护设计 摘要 关键词： 35kV变电所设计  THE DESIGN OF 35kV SUBSTATION AND RELAT PROTRCTION AT A TIME ABSTRACT Along with the continuous development of electric industry, people require increasingly demand of power supply, especially the stability, reliability and continuity of it. While the stability, reliability and continuity of power grid is determined by the rational design and configuration of substation. A typical substation needs the reliable and flexible operation, the economic rationality and free expansion of the equipments. For the consideration of these aspects, the paper designs a transformer substation of 35kV which has tow level of voltage, one is 35kV, and the other is 10kV. At the same time, choose the rational selection as to the main equipments in substation. This design chooses two main transformers. As to other equipments such as Circuit Breaker, Isolating switch, Current Transformer, Voltage Transformer, Reactive power compensation device, Protective Relay and so on are to be selected, designed, and configured in accordance with specific requirements. We should make it reliable to operate, easy and simple to manipulate, economical, with the possibility of expansion and flexibility of changing its operation. We also need make it more actual and practical significant. KEYWORDS：35kV, substation, design, transform, reliability  目录 绪论 在当今社会，电能俨然成为国民经济的基础，一切电气设备的运行都离不开电能。电能从发电站发出，经过线路传送以及经变压器变压，最后分配到用户的设备上，整个过程，几乎是在刹那间完成的，保持功率平衡显得尤为重要。变电站是发电厂和用电设备之间的枢纽，起到了桥梁的作用，电能都是通过变电站变压或者分流后输出的。电气主接线是整个变电站设计的骨架，电气设备和继电保护装置的型号都需要根据主接线来选择。一个优秀的变电站设计既能满足当地的用电，同时可以削减投资和资源的最大化利用。 我的论文课题是35kV变电站一次系统及继电保护设计。此次设计所涉及的内容原理清楚准确，层次分明。主要从主接线的制定和选择、短路电流的计算、电气设备选型、继电保护装置的选择等几个方面来说明，并且绘制了电气主接线图、短路点选择图和10kV短路等效图。这些设计都是依据大学几年对专业课的学习，并且按照与其相关的规定和原则来完成的。由于自己没有实际经验，会有一些疏忽和不足之处，希望老师给我一些改正和建议。  1 原始资料 1.1电力系统接线图 待设计变电所进线如图1所示：