【作者】 赵玉富；

【导师】 叶妙元；

【作者基本信息】 华中科技大学 ， 电工理论与新技术， 2005， 硕士

【摘要】 随着电力系统朝着数字化、智能化和自动化方向的发展,对控制、计量、保护和监测设备提出了更高的要求,开发新型的互感器和传感器成了国内外研究的热点。本文首先介绍了电力系统发展概况,传统电磁式电流、电压互感器和电容式电压互感器的工作原理及存在的缺点,新型互感器的基本原理和优点,国内外对新型互感器的研究现状,确定了用Rogowski 线圈测量mA 级小电流的研究方向。其次,论述了Rogowski 线圈的工作原理和微分、自积分两种工作状态,分析了影响Rogowski 线圈输出的条件和它应用在电力系统中的稳态与暂态响应,并给出了线圈设计的一般原则。再次,针对于被测电流很小(毫安级),设计了一种特殊的线圈结构,对此结构的线圈进行了分析论证,并对后续处理电路进行了分析,尤其是重点分析了积分电路,它是后续处理电路的基础; 基于此,提出了用电容器对地电容电流的大小测量电容器上的电压和不平衡电流的在线监测两种应用的原理框图。最后,给出了特殊结构线圈的线性度试验和温度试验数据,利用此结构线圈设计了上述两种应用的整体试验,并对电磁兼容性进行了理论分析和论述; 针对两种应用所得的试验数据,进行了深入分析,并提出了改进的措施和方法。更多还原

【Abstract】 With the development of power system to digitalization, automatization and intellection, it puts forward greatly demanding for facility of control, measurement, protection and inspection. At present, that makes new kinds of transducers and transformers is disquisitive hotspot at mainland and overseas. The paper introduces general situation of power system at first, and it also introduces principle and disadvantage of conventional TA/TV, CVT. It introduces principle and advantage of new kind of transformers. The paper introduces general situation of making new transformer national and international. Which uses Rogowski coil to measure weak current (mA ) is chosen to research. Secondly, the paper introduces principle of Rogowski coil and two kinds of working state of differential and integral. It analyses conditions that influence output of Rogowski coil. and response of static state and transient state in power system. The paper puts forward general principle for designing coils. Thirdly, it designs a special kind of coil to measure weak current, and analyse and demonstrate this coil. The paper analyses the back disposal electrocircuit and primarily describes integral electrocircuit. And base on it, it brings forward principle block diagram of inspecting imbalance current and measuring voltage of capacitor by surveying leak current of it to earth. Finally, the paper presents the results of linearity and temperature tests by special framework coil. And base on this coil, it design the whole experimentation of above-mentioned two applications and describe academic analysis of EMC. Giving the test results of the two applications and analyzing the test data. At last giving improvement and idea in future.更多还原