换流变压器噪声预测模型及其简化研究

摘要

换流变压器作为高压直流换流站主要噪声源,其噪声预测精度和控制方法的选择将直接影响换流站整体噪声预测水平及治理效果.通过对换流变压器噪声的产生机理、噪声频谱及常见治理方案等方面进行系统研究,重点推出了换流变压器噪声控制方法BOX-IN技术,并就BOX-IN装置的噪声预测模型进行了简化和对比验证.通过对降噪量进行现场测试,结果表明,BOX-IN装置降噪量达到20 dB(A)左右,与理论计算值近似,为进一步提高高压直流换流站噪声预测精度提供了理论依据.%As a main noise source of High-Voltage Direct Current (HVDC), converter transformer's noise prediction precision and the choice of control methods will directly influence the level of noise prediction and management effect for converter station. Through the systematic studies on the noise-generation mechanism, frequency spectrum, noise consol measurements and so on, the paper highlighted the BOX-IN technology, simplifies and validates noise prediction model for BOX-IN equipment. According to the field test, the result indicates that the noise reduction quantities of BOX-IN equipment achieves about 20dB(A) corresponding to the theoretical calculations, which provides a theoretical basis for improving the noise prediction precision of HVDC furtherly.