毕业设计-Rogowski线圈电流传感器的积分器设计.doc

燕山大学毕业设计/论文 Rogowski线圈电流传感器的积分器设计 燕 山 大 学 2012年6月 摘要 长期以来，电流传感器在电力系统继电保护和电流测量中占有不可替代的地位。传统的磁式电流传感器(CTS)在作为测量与保护用时，它的磁路饱和问题一直困扰着人们。随着继保护和测量装置向微机化和数字化方向的发展，设备不再需要高功率输出的电流互感器。这一来，低功率输出、结构简单、线性度良好的Rogowski线圈电子式电流传感器(ETA)引起人们的注意，并且进入广泛的研究阶段。Rogowski线圈主要应用于测量交流大电流、脉冲电流、电力系统中的暂态电流等方面。本设计着眼于Rogowski线圈结构参数和电磁参数。着重研究了Rogowski传感头的频率特性。首先详细阐述了 Rogowski 线圈测量电流的原理及其等效电路模型。根据传感头的频率特性设计后继信号处理电路。后继电路的主要设计就是设计积分器。积分器是基于Rogowski线圈电子式电流互感器中的关键环节之一。文中给出了新型结构有源外积分复合式罗氏线圈积分器的设计过程和参数选取方法，在保证传感器具有合适灵敏度的前提下，将传感器的工作频带拓宽到线圈的自然谐振频率。仿真验证了这种新型的罗氏线圈传感器可工作在从工频到高频的大带宽测量范围。 关键词：Rogowski线圈电流传感器、积分器、传感头等效电路、频率特性  Abstract For a long time，current transformers(CTs) are important components for current measurement and relaying protection in power system.When traditional electromagnetic type CTs are used for measurement and protection，the problems of Their magnetic path saturation always disturb people.With the development of the computerized and digital technology of measurement and protections devices，the devices dont math with CTs of big output power.Thus electronic current transformers(ETA) based on Rogowski coil with the advantages of small output power，simple construction and ideal linearity attract peoples attention and come into extensive research.Rogowski coils are increasingly used to measure high voltage AC current in power industry.The relations between dimensions and electromagnetic of the Rogowski coil have been studied.In this paper, high frequency behavior for a Rogowski coil is analyzed stressly. This paper expounded the principle of measuring current by Rogowski coil and its equivalent circuit model. Corresponding outside integrator circuits are built according with characteristic of the Rogowski.Describeing integrator is main problem in describeing outside integrator circuits.Integrator is a key element in an electronic current transducer based on Rogowski coil. A novel compound integration circuit is described in this paper, which is consisted of self-