电弧炉主电路硬件仿真试验系统设计

Design of experiment system for electric arc furnace primary circuit

该系统的设计目的是提供一个在现场试验前检验针对电弧炉电极调节系统所提出的控制算法的一个试验平台.该系统以单片机为核心,由检测的电流波形相位和控制信号大小产生模拟信号,模拟信号经功率放大设备放大后接入仿真变压器.试验结果表明,仿真电弧电压幅值可调,对外呈现纯阻性,与实际电弧典型波形相一致.试验系统与实际系统有相同的平均功率因数.仿真电弧的电流与控制信号符合实际系统的对应关系.在模拟电弧炉电弧电气特性上探索出了一种可行的、简单的方法,能够模拟出和实际电弧炉主电路相一致的外特性,能够满足电弧炉电弧控制试验的需要.

A design for experiment system of electric arc furnace primary circuit is presented, which offers a experiment platform for control arithmetic of modulation system of electric arc furnace＇s electrodes. SCM （single chip microcomputer） is the core of this system which generates a simulative signal based on the phase of the current of the primary circuit and amplitude of the control signal. The simulative signal is then magnified by the power magnification device as the simulation of the real electric arc. The results show that the simulative arc that has a resistant characteristic can be regulated, and has the same waveform as the real arc. Also, the experiment system has the same average power factor as the real one. The relationship between the simulative arc current and the control signal is in accordance with the real system. This paper provides a simple, feasible way to simulate the electric characteristic of electric arc furnace. According to the experiments, this system and the real system＇s electric characteristics are almost the same. The system satisfies the requirements of experiments carrying on the electric arcfurnace＇s electrodes controller.