基于中低电压等级的电子式互感器合并单元的研究与设计

Research and design of combined unit of electronic transformer based on middle and low voltage level

针对目前应用于中低电压等级的电子式互感器合并单元设计复杂成本较高的问题,该文提出了一种使用单MCU且符合IEC61850标准的、应用于中低电压等级电子式互感器合并单元的低成本简易实现方案。并设计了试验系统,完成了采样值传输的验证工作,得到了采样值传输的结果。对系统的试验结果表明:该试验装置能够实现要求的同步精度,以及0.2级的测量精度,采样值时间传送的延迟也在可以接受的范围。

Aiming at the problem of complexity and high cost in the design of electronic transformer merging unit used in middle and low voltage level,a simple implementation scheme of low cost using a single MCU and conforming to IEC61850 standard is proposed.The test system is designed,and the verification work of sample value transmission is completed,and the result of sample value transmission is obtained.The test results of the system show that the test device can achieve the required synchronization accuracy,as well as the measurement accuracy of 0.2,and the delay of sampling time transmission is also in an acceptable range.