The impact of starting high-power equipment on the power grid

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The total power of the four plasma devices is over 2000 KW. The load characteristics are such that the arc changes rapidly at all times; these rapid changes in the arc cause the output voltage of the power supply equipment to vary as well in response to these load changes, resulting in large voltage fluctuations. Taking this system as an example, the control response time must be within the μS range, the feedback response time is in the mS range, the effective voltage of the power supply is 830V, and the instantaneous voltage fluctuations are severe, ranging from 600V to 1200V. Unlike conventional resistive load power supplies, such plasma load power supplies require consideration, from the design stage onward, of the interference caused by conduction, radiation, harmonics, etc., on the power grid and other power supply devices. These are all qualitative analyses. Is there any quantitative analysis that can be referred to?