【摘要】 由于电弧的非线性,炼钢电弧炉在生产过程中会产生大量的高次谐波,并导致供电网络的电压波动和闪变,为解决这一问题,建立了一个新的电弧炉电弧时域模型.新的电弧模型从电弧物理机理出发,选择电弧电导作为状态变量,用非线性微分方程描述,并且给出了模型参数的计算方法.通过调整模型中的参数,可以模拟电弧炉电气系统参数变化时的电弧特性.仿真结果表明,模型输出的电弧电压、电流与现场实测数据基本一致,验证了模型的正确性.更多还原

【Abstract】 Because of the nonlinearity of arc,numerous high-order harmonics will come to occur in the arc furnace operational process and can result in voltage fluctuations and flicker in the power network.To solve the above adverse problems,a new time domain arc model for arc furnace is developed,which is based on the physical mechanism of arc and takes the arc conductance as the state variable to express the model in terms of a nonlinear differential equation.In addition,the method to calculate the model parameters is given.The arc model can fully account for changes in the different parameters of the electrical power system by adjusting arc model parameters.The simulation results showed that the output arc voltage/current calculated from the model is basically in conformity with the voltage/current measured in situ,thus verifying the validity of the new arc model.更多还原