400V Harmonic compensator for Automotive Manufacturing Industry

Project background: An automotive decoration company in Jiangsu mainly operates with non-linear loads. The load has a high level of harmonics, leading to a high failure rate of capacitors in the on-site reactive power compensation cabinet, and the transformer in the distribution room generates significant noise. After discussed, our company’s active harmonic filter cabinet was installed to address the harmonic issues.

Before the filter cabinet was installed, the 3rd to 13th harmonics is particularly high in the system. The measurement data is shown in Table 1

Table 1: Harmonic Content Before Cabinet Install

After the active harmonic filter cabinet was activated, the harmonic content on the system side was measured, with the measurement data shown in Table 2. It can be observed from that the harmonic content on the system side was significantly reduced, demonstrating a clear mitigation effect. Additionally, the noise of transformer also decreased noticeably. What’s moret, all the capacitors are operating normally with no reported damage base on feedback from the electrical manager.

Table 2: Harmonic Content After Cabinet Install