Design And Development Of Remote Power Demand Monitoring System For Electro-fused Magnesium Furnaces

Generally, submerged arc furnace with low voltage and high current features is used for melting in our country. Fused magnesia submerged are furnace high energy-consuming, which belongs to the high energy-consuming industry. During the produce, power varies in a wide range and leads to the impact on the national grid load management. According to the national regulation, the State Grid implements dual systems of price to fused magnesia producers. Dual system price has two ways of charging:Maximum Demand mode and Transformer Capacity mode.Fused magnesia producers usually take the Maximum Demand mode, so supervisory control for power demand becomes the new topic that the producers care most. The supervisory control for power demand helps to reduce production cost, increase fused magnesia production and improve economic performance. What’s more, it can reduce the impact on the grid and narrow the difference of peak valley of the grid. Now the supervisory control for demand in China has just started, in most factories, it is still man-controlled. This leads to higher labor load and lower efficiency, power demand is usually wasted or over ranging and thus increases the production cost. To deal with the current situation of fused magnesia industry, a remote supervisory control system for fused magnesia furnace group power demand was proposed. Through local multi-stage monitoring method, optimization of local consumption monitoring; remote monitoring to overcome the distance problem, to make it convenient for enterprise management personnel to conduct remote monitoring and production guidance; at the same time, the system facilitates researchers to make mathematical analysis and modeling of consumption, so as to put forward better control method. The design of this system development mainly includes the following work.First, the development of supervisory control system for power demand of both domestic and overseas was studied. The dynamic changes of power demand in fused magnesia production was analyzed; needs analysis were conducted about the monitoring of electricity consumption.Considering the change of consumption characteristics and the needs analysis, to complete the design of remote monitoring system of electricity consumption of fused magnesia furnace. Based on the data collection and data communication, several control methods are used to take control. A collaborative work Zookeeper service system is implemented to transmit remote data. The human-computer interaction interface is designed to facilitate personnel operation.Based on the design of remote monitoring system of fused magnesia furnace consumption, separate modules were successionally developed. Through the PLC control system, the underlying control was realized; the data interaction and data remote transmission were achieved by the development of system software. By using the WINCC, human-computer interaction interface was developed. And finally to realize the local and remote monitoring control of demand monitoring system for electro-fused magnesium furnaces fused magnesia and parameter setting.At last, applying the remote power demand monitoring system for electro-fused magnesium furnaces fused magnesia to industrial field and verifying each function of the system design. Combining with the filed application, the future development of the remote power demand monitoring system for electro-fused magnesium furnaces fused magnesia was prospected.