The current transformer with high quality PCB rogowski coils has big section structure which is opposite to the small section area requirement of the one with ideal rogowski coils. Through detailed theory analysis and formulas, the paper raveled out the limitation of big section and small section, and got conclusion that current transformer with big section and high quality PCB rogowski coils has the same measure principle as the one with ideal rogowski coils, which provides the theoretical basis for optimization design of current transformer with PCB rogowski coils and its application in the power system of mining area. The experimental research result showed that the current transformer with high quality PCB rogowski coils has good measurement accuracy, parameters consistency, excellent transient performance, and perfect resistant ability to electromagnetism, which suits for the development trend with further digitalization of power environment and power system in mining area.%高性能PCB空心线圈电流互感器为大截面结构,而理想空心线圈电流互感器要求为小截面结构.文章通过详细的理论分析和推导,解除了对截面大小的这一限制,得出大截面、高精度的PCB空心线圈电流互感器具有和理想空心线圈电流互感器相同测量原理的结论,为PCB空心线圈电流互感器的优化设计和在矿区电力系统中的应用提供了理论基础.实验研究结果表明,高性能PCB空心线圈电流互感器具有良好的测量精度、参数一致性、优异的工频暂态性能和抗电磁干扰能力,适应矿区的电力环境和电力系统进一步数字化的发展潮流.
展开▼
