现有TA开路保护装置的缺陷及改进方向

Limitation and Improvement Direction of Existing TA Open Circuit Protection Setting

叙述了TA二次回路开路时TA二次电压对电力系统运行的影响,结合电力系统现场运行、设计的特点和资料,分析了现有4种TA开路保护装置的基本原理、具体电路和固有缺陷,提出了相应具体的改进方向,并简要介绍了新型TA开路保护器的设计思路,希望性能完善的TA开路保护装置能在电力生产中发挥其积极作用。

The article introduces firstly the characteristics of TA second-coil voltage in many cases, describes the voltage features when TA second-coil open-circuit happens; Secondly analyzes some inherent disadvantages of existing TA open-circuit protection circuit by comparing actual running and design parameter and combining the specialty of power system. This paper brings forward the direction and measure of the protection circuit as a whole, to improve the technique and function of TA open-circult protection, design a new TA open-circuit n device, and the practical effect is obvious, The article draws some useful conclusion and hopes that TA open-circuit protection with perfect performance plays a active role in power system.