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PLC系统在现代钢铁行业中的广泛应用,大大提高了控制系统的精准化水平,但同时PLC系统易受干扰的问题也愈发明显。如处理不当,轻则导致整个控制系统运行不畅,重则会带来直接的经济损失。例如:某钢铁厂宽厚板厂试运行期间,多台行车PLC系统通讯模块烧毁,事后分析原因,一是由于大量使用变频器,加之该厂与电炉车间共用上一级的110KV变电站,电网中存在谐波分量,对PLC系统产生了干扰;二是行车系统PLC硬件存在一定缺陷;三是电缆
PLC system in the modern steel industry widely used, greatly improving the level of control system accuracy, but at the same time PLC system is subject to interference problems become more apparent. If handled improperly, ranging from the poor control of the entire system will lead to serious but will bring direct economic losses. For example, during the trial run of a heavy-metal mill in a steel plant, many communication modules of the PLC system were burned down and analyzed afterwards. First, due to extensive use of inverters and the use of 110KV substations at the same level with the electric furnace workshop, Harmonic components, the PLC system has generated interference; Second, there are some defects in the PLC system hardware; Third, the cable