煤矿工业热风炉智能供电系统功率因数复合调制的研究

Research on Power Factor Composite Modulation of Intelligent Power Supply System for Coal Mine Industrial Hot Air Stove

由于在实际应用中,煤矿工业热风炉智能供电系统存在着功率因数低、谐波扰动大等问题。为此,提出高频率启停煤矿工业热风炉智能供电系统功率因数复合调制方法。利用整流器数学模型计算直流侧稳态电压,并建立功率因数调制信号质量函数,计算高频启停状态下的有功功率和无功功率。获取功率因数复合调制反馈量,对比该反馈量与供电系统稳定状态下的功率,将差值输入至PI调节器内,控制高频率启停设备电流,实现煤矿工业热风炉智能供电系统功率因数复合调制。实验结果表明:计算煤矿工业热风炉智能供电系统稳态电压数值较为准确,有效实现高频率启停煤矿工业热风炉智能供电系统功率因数复合调制,应用效果较为显著,为电力系统工程中功率因数补偿和电压稳定等问题提供有力支撑。

Due to the practical application,the intelligent power supply system of coal mine industrial hot blast stove has the problems of low power factor and large harmonic disturbance.To this end,a high-frequency start stop intelligent power supply system for industrial hot blast furnaces in coal mines is proposed with a power factor composite modulation method.Use the mathematical model of the rectifier to calculate the steady-state voltage on the DC side,and establish a power factor modulation signal quality function to calculate the active and reactive power under high-frequency start stop conditions.Obtain the power factor composite modulation feedback quantity,compare this feedback quantity with the power under stable state of the power supply system,input the diference into the PI regulator,control the high-frequency start stop equipment current,and achieve the power factor composite modulation of the intelligent power supply system for the coal mine industrial hot blast stove.The experimental results show that the calculation of steady-state voltage values for the intelligent power supply system of coal mine industrial hot blast furnaces is relatively accurate,effectively achieving high-frequency start and stop of the power factor composite modulation of the intelligent power supply system of coal mine industrial hot blast furnaces.The application effect is significant,providing strong support for power factor compensation and voltage stability issues in power system engineering.