复杂组合下电弧炉的电压波动与闪变评估方法

Voltage fluctuation and flicker evaluation method for electric arc furnace under complicated combination

运行时电弧炉的电弧频繁起断和电极开路短路都会引起供电母线严重的电压波动与闪变。为保证电网优质稳定运行,需要对即将接入电网的电弧炉负荷进行波动闪变预评估。在现有国标的基础上,本文提出一种电弧炉负荷电压波动与闪变评估的实用计算方法,能分析多种类型电弧炉多母线接入所产生电压波动与闪变的复杂情况,同时给出治理方案。通过实际变电站负荷的算例分析,验证了所提方法的可行性。

Frequent arc break and electrode open-short-circuiting of the arc furnace during operation can cause severe voltage fluctuation and flicker in the power supply bus. For the high-quality and stable grid, a pre-evaluation of fluctuation and flicker of the arc furnace connected to the grid is required. Based on the existing national standard, a practical calculation method for the electric arc furnace load voltage fluctuation and flicker evaluation was presented in this paper. The voltage fluctuation and flicker caused by the multi-bar access of various types of arc furnaces and its control suggestions can be known by this method under such complicated situation. The feasibility of the proposed method was verified by an example of arc furnace loads in actual substation.