【作者】 李永臣；

【导师】 杨以涵；

【作者基本信息】 华北电力大学 ， 电力系统及其自动化， 2001， 硕士

【摘要】 电压互感器二次回路压降引起的电能计量误差，是电能计量综合误差的一个特殊的组成部分，电压互感器二次回路压降对电能计量误差的影响最大可达6％左右，根据有关统计因此少收电费的数目是非常惊人的。选择这一问题进行研究，提出相应的解决办法并形成可以实用化的产品，提高电能计量的准确度，对供电和用电部门都有着切实的意义。 本文首先分析了电压互感器二次回路的特点及其压降产生的原因，研究了它对电能计量误差的影响，总结了现有的降低电压互感器二次回路压降的几种方法及各自的特点。通过充分地收集相关的文献和资料，系统地综述了对这一问题的理论研究成果及实际应用的经验，确立了本文研究的主攻方向。 本文总结了电压互感器二次回路压降现场测试的各种方法，对现有的二次压降补偿器提出了新的改进方案，不仅使得这种装置的补偿特性更好，而且体积更小，外型更美观，与电能表盘相配。 针对原有补偿器需要信号线的问题，提出了一种分布式补偿系统的设计方案，这种方案取消了信号线，采用通信手段传递信号。 对电压互感器二次回路补偿器的安全性和可靠性进行的专门研究，提出了补偿器电子电路的电压保护和电流保护方案。 对新研制的电压互感器二次回路压降补偿器，分别进行了实验室测试和现场试运行，证明性能良好，对实验数据进行的分析。更多还原

【Abstract】 The error of energy measurement caused by PT secondary circuit voltage drop is a special part of the energy measurement composite error. The maximum value could be reach 6% that the energy measurement error caused by the PT secondary circuit voltage drop. It is very surprise that the lost electricity charge caused by it according to some relative statistic. To select this problem to study and present some relative solutions, thus make it converting to some practicality productions and enhance the energy measurement accuracy, these must have important meanings for both the electricity generator and electricity user. Firstly the reasons of the voltage drop in existence and the PT secondary circuit’s features are analyzed. The affect of the voltage drop to energy measurement, the several methods for reduce the voltage drop and each characteristic is summarized. By adequately collecting the relative literature and information, the researched fruit in theory and the experience of practicality application is summarized and establish the main task of the dissertation. In this paper the all kinds of method for the on site measurement and test of the PT secondary circuit voltage drop. Some new ameliorated schemes are presented to the secondary circuit voltage drop compensation device in being. Not only improving the compensation feature of the device, but also lesser in size, more suitable for the energy meter box because of the good-looking shape. For the compensation device existing must need the voltage signal line, a kind of distributed compensation system are presented. The voltage signal line was canceled in the new scheme and the voltage signal was sent by communication. The security and reliability of the new made compensation device are studied technically, a new scheme of current and voltage protection for the electronic circuit of the compensation device are set to forth. The new made PT secondary circuit voltage drop compensation device is tested and preliminary operation at the laboratory and the substation. The performance is proved well. The data is analyzed.更多还原