Peak Power Load and Energy Costs Using the Example of the Startup and Idling of a Grinding Machine

摘要

Countries worldwide are experiencing changes in their electricity generating portfolio, from base load sources - coal or nuclear - to more sustainable but more volatile and intermittent sources - wind or photovoltaics. Industrial, high wattage consumers with machines that have frequent short-term peak power loads can cause grid failure when a demand peak coincides with an available power lull. These demand peaks are fulfilled by fossil-fuel-based peaking power plants. To avoid additional energy and cost expenditures of peaking power plants and reduce the lifecycle impact of production, peak demand needs to be mitigated. A procedure is proposed to reduce the peak loads of a grinding machine by controlling machine parameters. First, spindle energy and power data is measured while varying ramp up time to evaluate peak load and energy consumption trade-offs. Then, a model is developed with three different objectives: minimize energy, peak power, or cost.