Design And Development Of Monitoring System Platform For The Electric Demand Of Fused Magnesium Furnaces

Fused magnesium has the characteristics of high melting point, strong anti-oxidant, dense structure, well chemical stability, high compressive reinforcement and strong anti-corrosion. Hence it is widely used in the field of metallurgy, chemical engineering, aerospace, nuclear industry and household appliances. The most commonly used production equipment for fused magnesia is three-phase AC electrical smelting furnace for magnesium in our country. Its melting process is mainly taking the electrical smelting method which is utilizing high electric current to produce electric arc to heat raw material, thus forming mineral substances from the molten pool. Fused magnesium smelting process will consume large amount of electricity, the proportion of the electricity cost in the total is over 60%. The electric demand is the average energy consumption in the enterprise. There is an urgent requirement to monitor the electric demand in the enterprise under the Two-Part Tariff policy of the Power Supply Bureau. Managing the power demand control for the power users, can avoid that the demand surpass the contract value and utilize the demand efficiently, thus help them to save cost, as well as to depress their load impulsive impact on local power network. As for power supply bureau, it can decrease the peak-valley difference, and improve the utilization efficiency of the electricity. Therefore, to design and develop electricity demand monitoring system platform of fused magnesia has great significance in the field of energy saving technology research in fused magnesia industry.At present, the electricity demand monitoring of fused magnesium enterprises mainly take the artificial monitoring method, their problems are backward technology, lacking of analysis of the state of electricity demand, and optimization of operation rules. In this paper, we have developed Monitoring System Platform for the Electric Demand of Fused Magnesium Furnaces and applied in industrial field successfully with the goals of improving the power efficiency, reducing the impact on production. The Platform has achieved good control effect in auxiliary artificial monitoring and power demand management. The main research work is as follows:(1) Introducing the basic electric demand monitoring model and the significance and the requirements for the enterprise. Analyzing current manual monitoring method of the fused magnesium enterprise and electric demand products both at home and abroad, then pointing out the problems.(2) Completing the requirements analysis of the fused magnesia enterprises. Summing up the overall design of the monitoring system platform’s requirements through the analysis of the power variation characteristics of monitoring objects and the requirement for monitoring system platform enterprises, operators.(3) Completing the overall design and development of monitoring system platform. According to the characteristic of demand and the operators’needs to design and develop the monitoring strategy which is composed of trend-judging strategy, priority strategy and decision-making reference. As for the hardware platform, uses PLC as the core and design demand monitoring system hardware structure. As for the software, we have adopted the modular programming ideas. The function of the complex task was decomposed into different independent modules:data collection and communication module, monitoring strategy of software modules, human-computer interaction module.(4) The Monitor System Platform has successfully applied in industrial field. It has greatly improved the automation level, and effectively reduced the labor intensity of operators, as well as improved the power efficiency and reduced the impact on production.