变压器GIC谐波效应动模试验

Dynamic Simulation of Transformer Harmonic Effect under GIC

试验对三相组式(单相)变压器空载、不同功率单相负载、三相四线制对称负载、三相三线制对称负载5种情况下遭受不同直流入侵时的一次绕组电流进行了测量。分析了变压器以上5种工作状态下,直流入侵导致的一次绕组电流畸变和谐波分布、各次谐波与直流的关系、以及不同运行方式下GIC谐波效应的影响。

In the test, the primary winding currents were measured when subjected to diffferent DC invasions in the five loading states, including three-phase group （single-phase） transformer no-load, single-phase load with different power, three-phase four-wire symmetric load, and three-phase three-wire symmetric load. Analysis has been conduc-ted on the primary winding current distortion caused by DC invasion in the aforementioned five loading states, particu- larly its correlation with harmonic distribution, various harmonics and DC, as well as the influence of geomagnetically induced current （GIC） harmonic effect under different operation modes.