Lastspitzen

Lastspitzen (plural) is a German term used in engineering and energy sectors to describe the times or events when system loads reach their maximum values. The word combines Last (load, burden) and Spitze (peak). The concept is used across disciplines to assess design adequacy, capacity planning, and operational strategies.

In electrical power systems, Lastspitzen denote peak electric demand periods. They influence the sizing of generation capacity, transmission and distribution infrastructure, and tariff structures such as peak-demand charges. Utilities measure Lastspitzen with metering data and forecast them through load forecasting, weather data, and consumption patterns.

In civil and structural engineering, Lastspitzen refer to the peak forces that a structure, component, or connection must resist. These can result from wind gusts, snow loads, traffic, or seismic events, and may differ from the average or seasonal loads. Design codes specify representative Lastspitzen as part of serviceability and ultimate limit state checks.

In energy management, identifying Lastspitzen enables peak shaving and demand-response strategies: shifting consumption to off-peak periods, using on-site generation or storage, and improving efficiency to flatten the load profile. Peak reduction can reduce costs and improve grid reliability.

Typical causes of Lastspitzen include business hours, extreme weather, and industrial processes with high and short-term power use. They are important for capacity planning, tariff design, and risk assessment, even when annual energy consumption remains moderate.

Related concepts include peak demand, load factor, load duration curve, and demand response.