【摘要】 柔直变压器振动特性与常规交流变压器差异显著，目前针对这一领域的研究，尤其是水冷式柔性直流变压器的振动特性研究尚显不足。本文作者以广州电网粤中换流站500kV水冷柔直变压器为研究对象，测试分析满功率调试、空载调试期间时域及频域特征变化规律。结果表明：靠近绕组的测试通道主频幅值、基频幅值与有功功率或电压呈现明显正相关性；电压或功率稳定时，靠近绕组的通道主频为100Hz、200Hz或350Hz。此外，频率复杂度与奇偶谐波比容易受到功率或电压调整的影响。值得注意的是，0～400Hz能占比能有效反映柔直变压器健康状态。据此，得出对水冷柔直变压器振动监测测点应尽量靠近绕组，避开分接开关、水冷却器及油箱顶部位置，为水冷柔直变压器振动测试及健康监测提供了重要参考。更多还原

【Abstract】 The vibration characteristics of flexible DC transformers are significantly different from those of conventional AC transformers. The research on this field, especially the vibration characteristics of water-cooled flexible DC transformers, is still insufficient. In this paper, the 500kV water-cooled flexible DC transformer of Yuezhong converter station in Guangzhou power grid is taken as the research object, and the variation law of both time domain and frequency domain characteristics during full power debugging and noload debugging is tested and analyzed. The results show that the main frequency amplitude and fundamental frequency amplitude of the test channel near the winding are positively correlated with the active power or voltage. When the voltage or power is stable, the main frequency of the channel near the winding is 100Hz, 200Hz or 350Hz. In addition, frequency complexity and odd-even harmonic ratio are easily affected by power or voltage regulation. It is worth noting that the proportion of 0～400Hz can effectively reflect the health status of the flexible transformer. Based on this, it is concluded that the vibration monitoring points of the water-cooled flexible DC transformer should be as close as possible to the winding, avoiding the tap changer, the water cooler and the top position of the oil tank. This paper can provide an important reference for the vibration test and health monitoring of the water-cooled flexible DC transformer.更多还原