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针对硅锰合金埋弧炉三相电极功率不可测、难以实现三相熔池有效功率平衡的问题,提出了基于电源中心点和熔池中心点的三相电极功率在线估计方法,通过构造电源中心点,实现对电炉变压器高压侧各相电压、相电流、相有功功率的在线测量;通过构造熔池中心点,实现了变压器低压侧三相熔池电压的在线测量,基于能量守恒原理建立了硅锰铁合金埋弧炉电极有功功率机理模型。考虑到建模过程中各种假设和简化引起的估计误差较大,采用BP神经网络对机理模型进行在线补偿。将该方法应用于某铁合金厂12500k VA硅锰铁合金埋弧炉三相电极功率在线测量,结果表明其有效性。
Aiming at the problem that the power of three-phase electrode in silicon-manganese-alloy submerged arc furnace is not measurable and the balance of effective power of three-phase molten pool is difficult to achieve, an on-line power estimation method of three-phase electrode based on power center and molten pool center is proposed. The online measurement of the voltage, phase current and phase active power of the high voltage side of the EAF transformer is realized. By measuring the center of the weld pool, the on-line measurement of the voltage of the low-pressure side three-phase melt pool is realized. Based on the energy conservation principle, Electromechanical active power mechanism model of ferromanganese submerged arc furnace electrode. Taking into account the various assumptions and simplifications caused by the modeling process larger estimated errors, the BP neural network on-line compensation mechanism model. The method was applied to the on-line measurement of the power of a three-phase electrode in a 12500k VA ferromanganese submerged arc furnace in a ferroalloy plant. The results show that the method is effective.