毕业设计--基于PLC的变压器成套保护装置设计

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1、毕业设计 基于基于 PLCPLC 的变压器成套保护装置设计的变压器成套保护装置设计 摘要摘要：变压器在运行中，由于内外部故障，有时候我们无法及时辨别和采取措施，容 易引起一些事故。分析变压器的保护原理及影响保护动作的误动作缘由，分析确定合 适的整定值以及采用可编程逻辑控制器来提高保护系统的效率。 改善配电网变压器的 保护正确率不高、查找故障停留时间过长进而影响生产供电可靠性等不足。研究讨论 了软硬件系统的搭接、 模拟量扩展模块和定值算法等问题,并设计了基于PLC的配电变 压器保护系统。该系统具有结构简单、抗干扰性强、可靠性高等特点的数字化改造系 统。 关键词关键词：变压器 ；继电保护 ； 可编

2、程逻辑控制器 ； 模拟量 ； 定值算法 毕业设计 Based on PLC Transformer Protection Device Package Design ABSTRACT：Sometimes, It is very easily lead to a number of incidents that we couldt identified a time and to take a good measures ,when the transformers were broken with internal and external faults ,especially in oper

3、ationing.Analysis of transformer protection principle and impact protection actions cause malfunction analysis to determine the appropriate setting value and the use of programmable logic controller to improve the efficiency of the protection system. The measures that improve the distribution electr

4、icity network transformers protection accuracy not high, the trouble shoot resident time .And production power supply reliability and insufficiencies . Of software and hardware systems lap discussed, analog expansion module and set arithmetic problems, and design of PLC based protection system for distribution transformer. The system has simple structure, strong anti-interference and high reliability features of the digital transformation of the system. KEY WORDS： transformer ； relay protec