电流互感器毕业论文.doc

沈阳化工大学()
本科毕业论文
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摘要
随着大容量和高电压电力系统的发展,广泛应用于电力系统中,起到测量和保护作用的电流互感器行业开始变得越发重要。在电气工程中,电流互感器是用来测量电路中电流大小的装置。电流互感器与电压互感器,也称为仪器用变压器。当某一电路中的电流过大以至于不能通过仪器直接测量出来,这时在电路中电流互感器的另一侧会准确地产生成比例的小电流,这样就可以方便直接用仪器测量并记录。电流互感器同时可以隔绝待测电路中可能出现的高电压,以便保护测量仪器。在电力行业中,电流互感器广泛地用在测量和保护延迟中。
电流互感器在我国正处于发展阶段,所以如何设计1000A电流互感器成为了本次设计的主要目的。本文主要有以下几个目标:电流互感器发展现状与趋势;
电磁场基本知识;电流互感器的工作原理;电流互感器产品设计流程及参数计算。
通过实现以上目标,实现对1000A电流互感器的设计,设计电流互感器的意义在于对电流互感器实现完整的了解,对以后从事相关行业起到重要的帮助。
关键词:电流互感器;设计;测量
Abstract
With the development of electrical power system to the large capability and high voltage,the manufacture of current transformers which be widely used in the measurement and protection of electrical power system has been strongly necessary. In electrical engineering, a current transformer (CT) is used for measurement of electric currents. Current transformers, together with voltage transformers (VT) (potential transformers (PT)), are known as instrument transformers. When current in a circuit is too high to directly apply to measuring instruments, a current transformer produces a reduced current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. A current transformer also isolates the measuring instruments from what may be very high voltage in the monitored circuit. Current transformers monly used in metering and protective relays in the electrical power industry
Now current transformer is on the stage of development in our country,so how to design a 1000A current transformer is the main purpose of this at the above objectives,the author has pleted the following tasks:
development and the tendency of current transformer.
basic knowledge of ic field.
operating principle of current transformer.
design process of the production and the parameter calculation of current transformer.
Through achieve above projects