Selection of buffer reactors and synchronous condensers on power systems supplying arc-furnace loads

The studies and analyses presented in this paper provide a rational method for the selection of the optimum buffer reactance and synchronous condenser size to limit flicker-voltage disturbances caused by arc-furnace loads on power systems in those cases where such corrective measures are required. The influence of the system parameters, including buffer reactance, condenser size, system reactance, and amount of additional steady loads such as furnaces in the refining stage of the melt, are considered simultaneously with shock loading produced by a furnace operating in the melt-down stage. In addition, the magnitude and frequency of the shock load are varied over a considerable range, since there is no generally accepted typical shock.