Using measurements and analytical studies to minimize power quality issues impacting tin mill operations

T. Dionise, V. Lorch
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引用次数: 0

Abstract

Power quality related issues have impacted the operations of the tin mill in a large integrated steel mill. Specifically, voltage variations have upset PLCs, locked computer based controls, caused UPS to frequently transfer to battery, and in general, interrupted the process control for the tin mill operations. The nature of the voltage variations were quantified by monitoring the electrical distribution system supplying the tin mill at key 6900 V and 575 V locations. The measurements identified substations with significant total harmonic voltage distortion, and were used to develop an accurate model of load flow and harmonics. Both load flow and harmonic analytical studies were performed to investigate alternatives to minimize the voltage issues. Recommendations are given including 1) optimum transformer tap settings for each 575 V substation, 2) optimum location for harmonic filters to limit voltage distortion within IEEE standards, and 3) specification for the filters to reduce the loading of transformers to within equipment ratings. Finally, the impact of future plans to replace additional M-G sets with rectifiers is discussed.
通过测量和分析研究,将影响锡厂运行的电能质量问题降至最低
某大型综合钢厂锡厂的电能质量问题影响了锡厂的正常运行。具体来说,电压变化扰乱了plc,锁定了基于计算机的控制,导致UPS频繁地转移到电池,并且在一般情况下,中断了锡厂操作的过程控制。通过监测为锡厂供电的配电系统在6900 V和575 V的关键位置,对电压变化的性质进行了量化。这些测量确定了具有显著总谐波电压畸变的变电站,并用于建立准确的负荷流和谐波模型。进行了负荷流和谐波分析研究,以研究最小化电压问题的替代方案。给出的建议包括1)每个575 V变电站的最佳变压器分接设置,2)谐波滤波器的最佳位置,以限制IEEE标准内的电压失真,以及3)滤波器的规格,以减少变压器的负载到设备额定范围内。最后,讨论了未来计划用整流器替换额外的M-G机组的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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