SVC装置传导骚扰建模和预测

Modeling and Prediction of the Conducted Interference Induced by SVC Equipments

柔性交流输电(FACTS)设备在电力系统和工业用户中得到了广泛应用,但其中大功率器件的频繁开关将产生很陡的瞬态脉冲,对二次侧电子设备造成电磁环境污染。针对用于轧钢机负荷的一套晶闸管控制电抗器型静态无功补偿器(SVC),基于Matlab软件系统建立了其动态仿真模型,以定量分析和预测电磁骚扰情况。轧钢机负荷的3个典型工作状态通过三相动态负荷模块实现,并参考IEEE标准搭建了其控制系统模型。将仿真结果与现场实测数据进行了比较,验证了该仿真模型的有效性。提出的建模策略对分析SVC的电磁骚扰机制和评估电磁环境提供了基本方法。

FACTS equipment is widely used in power systems and industrial utilities, however, due to frequent switching of the thyristors, a large amount of broadband electromagnetic emissions are generated to potentially endanger the electronic devices in the secondary side. With regard to a FC-TCR type SVC installation used for the rolling mills system, dynamic simulation models were established based on the Matlab SimPower Systems Blocksets to study the induced electromagnetic emissions. A three-phase dynamic load model was developed to simulate the three operational processes of the rolling mills, while the control system model was set up based on the IEEE standard specifications. The simulation results are correlated with the on-site measurements as to verify the modeling methodology. The proposed modeling scheme presents fundamental reference for characterizing the SVC-based interfering mechanisms and effectively evaluating the electromagnetic environment.