Direct Reduction Plant Alternator Synchronization Using DC Motor and Synchronous Generator with Complete Reduced Machines Transient

Chizindu Stanley Esobinenwu, L. Owuda
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Abstract

Direct Reduction Plant alternator synchronization using D.C. motor and synchronous generator with complete reduced machines transient is presented. This is very significance in the industrial world. Direct Reduction plant is an iron making process plant for the new era which utilizes natural gas to reduce iron ore to produce Direct Reduced Iron used in steel industry. An alternator is an electrical generator that converts mechanical energy into AC electrical energy. Synchronization is connection of an alternator into the grid in parallel with many other alternators that is live of constant voltage and frequency. Transient stability is one of the major factors for proper operation of the Direct Reduction plant production systems that lead to major system collapses. The stress on Direct Reduction plant machines systems is increasing day by day, due to faults, economic and environmental pressures, sudden load change, deviation of active power and frequency. This phenomenon constitutes negative threat to Direct Reduction plant stability. The study was carried out to examine the capacity and transient stability on the Direct Reduction plant machines to withstand disturbance while quality of service is maintained. The effect of improper phase condition upon the synchronizing process, phase sequence of three phase power line, direct current excitation effect upon the power deliver by alternator, power delivered by an alternator upon the torque delivered by the prime mover. The challenges were solved and analyzed using individual machine with the help of accurate step by step integration and Electrical Transient Analyzer Program MatLab software. Swing equation was solved using advanced Runge-Kutta’s method. An experiment was conducted in Electrical Engineering laboratory and machines transient stability of the plant was improved by 64 percent averagely. The results were depicted graphically for machines dynamic behavior studies and recommended for Technician and Engineers in steel and related industries
用直流电机和同步发电机与全减速器同步的直接减速器交流发电机
介绍了直流电机与同步发电机在全减速器暂态下的直接减速器交流发电机同步。这在工业世界是非常重要的。直接还原厂是利用天然气还原铁矿石生产用于钢铁工业的直接还原铁的新时代炼铁工艺装置。交流发电机是一种将机械能转化为交流电能的发电机。同步是将一个交流发电机与许多其他交流发电机并联到电网中,这些发电机以恒定的电压和频率工作。暂态稳定性是直接还原装置生产系统正常运行的主要因素之一,它会导致系统的重大崩溃。由于故障、经济和环境压力、负荷突变、有功功率和频率偏差等原因,直接减速机系统承受的压力日益增加。这种现象对直接还原植物的稳定性构成了负面威胁。研究了直接减速机在保持服务质量的同时承受扰动的能力和暂态稳定性。不适当的相位条件对同步过程的影响,三相电源线的相序,直流励磁对交流发电机输出功率的影响,交流发电机输出功率对原动机输出转矩的影响。借助精确的分步集成和电瞬变分析程序MatLab软件,利用单机解决和分析了这些难题。采用先进的龙格-库塔法求解摆动方程。在电气工程实验室进行了实验,结果表明,该装置的机器暂态稳定性平均提高了64%。结果以图形方式描述,用于机器动态行为研究,并推荐给钢铁及相关行业的技术人员和工程师
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