电气工程及其自动化专业【毕业设计 文献综述 开题报告】高压隔离开关温升的研究和设计（可编辑）.doc

电气工程及其自动化专业【毕业设计+文献综述+开题报告】高压隔离开关温升的研究和设计 （20_ _届） 本科毕业设计 高压隔离开关温升的研究和设计 摘 要 高压隔离开关是发电厂和变电站电气系统中重要的开关电器，使用范围广，使用量大，其主要功能是：保证高压电器及装置在检修工作时的安全，起隔离电压的作用，不能用与切断、投入负荷电流和开断短路电流，由于高压隔离开关没有灭弧装置，所以说它不具有灭弧功能。 高压隔离开关在工作时随着电流的不断流过，温度会上升，从而会影响高压隔离开关的性能，并且可能导致高压隔离开关过热。而影响高压隔离开关温升的主要原因是开关的回路的电阻。回路电阻越大，温度就上升的越高。 温升值是它的一项重要性能指标。它影响到开关的制造成本、运行安全性与使用寿命。开关的温升值是它本身发热与散热两方面因素综合作用的结果。 采用直流电压降法对高压隔离开关进行回路电阻测试实验，了解高压隔离开关的温升主要原因是回路电阻的大小。当回路电阻很大时，隔离开关的温升将会很高，回路电阻很小时，温升就不怎么高。针对高压隔离开关的温升问题，提出解决对策。比如使用导电性能更好的材料，改善高压隔离开关的触头系统。 对高压隔离开关进行改良设计，采用更先进的制作工艺，更有利的器件结构，性能更佳的材料。改善制作设计，采用外压式不锈钢弹簧，在接触部位设钩板结构的安全装置等等。 关键词：高压隔离开关，温升，回路电阻，直流电压降法，改良设计 Temperature rise of high-voltage isolation switch and Design Abstract High-voltage isolating switch is in electrical systems in power plants and substations important electrical switches, using a wide range and high volume, and its main features are: high-voltage electrical appliances and devices to ensure safety at work in repair, the role of the voltage from the isolation, can not be used with Cut off, breaking into the load current and short circuit current, can only be used does not produce a strong arc some of the switching operation, which means it does not have the arc function. High-voltage isolation switch at work constantly with the current flow, the temperature will rise, which will affect the performance of high-voltage isolating switch, and may lead to high-voltage isolation switch overheating. The temperature rise of high-voltage isolation switch is mainly due to the resistance of the switch circuit. Loop resistance greater, the higher the temperature to rise. Temperature rise is that it is an important performance index. It affects the manufacturing cost of switching, operation safety and life. The temperature rise is that it switches itself both heating and cooling combined result of factors. DC voltage drop method using high-voltage isolating switch circuit resistance test experiment to find the temperature rise of high-vo