General Information

We all take electricity for granted so we seldom think about it. But everyday life in a big city is unthinkable without reliable electricity. And people often only become aware of their personal power consumption when they receive their electricity bill.

This presentation of the energy demand (load) and the respective generation in Hamburg gives you the possibility to check your consumption habits and those of your environment.

Stromnetz Hamburg GmbH and the Free and Hanseatic City of Hamburg provide you with current and historical data on energy generation and energy requirements. Where possible, you will be able to find the data for Hamburg and additionally for each district. And since not all of the electricity used in Hamburg is also generated in the city of Hamburg, we'll show you exactly how much electricity is being imported.

Questions and Answers(FAQ)

What belongs to the Hamburg distribution grid?

The Hamburg distribution grid includes all cables, overhead lines and power facilities in the voltage levels high, medium and low which are located in the city of Hamburg. The connecting cables to the Wedel power plant and to the pumped storage power plant in Geesthacht are also part of Hamburg's distribution grid.

What is a distribution grid?

The direct power supply to almost all households, services, commercial and industrial facilities is effected via a distribution grid. In this context, the distribution grid itself consists of three voltage levels: high, medium and low.

High voltage

High voltage refers to voltages between 60,000 volts (60 kV) and 110,000 volts (110 kV). It is used for energy transmission over extensive, regional distances, as well as for the supply to high intensity customers.

Medium Voltage

Medium voltage is used for power transmission in closer regional areas. This voltage range is between 1,000 volts (1 kV) and 60,000 volts (60 kV). The upper limit is not firmly defined and is open to different interpretation. In Germany, the usual medium voltage grids have got a voltage of 10, 20 or 30 kV.

Low voltage

Low voltage refers to AC voltages up to 1,000 volts. The standard low voltage, which can be found in German households, is 230 volts AC or 400 volts for three phase AC (e.g. instantaneous water heaters).

What is a transmission grid?

Electricity is transported over long distances via a transmission grid. Large power generation facilities usually feed the generated electricity into the transmission grid. Even some of the very large industrial companies obtain their electricity from the transmission grid. A high-voltage transmission grid is usually operated with 380,000 volt (380 kV).

Where does the data in the energy portal come from?

The data is compiled and published by the Hamburg distribution grid operator, Stromnetz Hamburg GmbH.

Where does the population, area and population density data come from?

This data is taken from publications by the Statistical Office for Hamburg and Schleswig-Holstein.

What does load mean?

The term load describes the electrical energy requirements or how much power has to be held available in the electricity grid. The load is measured in the physical unit watt (W) for electrical power. If the electrical power is used, it is labelled as power consumption, which is measured in the physical unit kilowatt-hour (kWh)..
1.000 Watt = 1 Kilowatt
1.000 Kilowatt = 1 Megawatt = 1.000.000 Watt

What is the (electrical) power (W)?

(Electrical) power is the (electrical) work supplied per time unit, measured in watt. With regard to electrical power the following can be distinguished: reactive power, active power, apparent power.

Reactive power is the electrical power, which is needed for the creation of magnetic fields (e.g. engines, transformers) or electrical fields (e.g. capacitors) and does nor contribute to usable work.

Active power is the opposite of reactive power and refers to the consumed electrical energy, which was converted into useful energy (movement, light or heat).

Apparent power is the geometric sum of reactive and active power. It is, among others, relevant for the design of electrical facilities.

What is the annual peak load?

The annual peak load is the value of the highest energy requirements within one year, It refers to the highest load value for the last 12 months.

Where does the data on the load come from?

The data is calculated from the decentralized grid feed-in and the feed- in from the upstream grid. For the districts, the total load is divided based on local readings.

How are CO2 emissions calculated?

The displayed CO2 emissions are calculated on the basis of the current total load of the city of Hamburg. In this context we use the factor from the interim report CO2 Monitoring by the Hamburg Climate Protection Concept. (http://www.hamburg.de/contentblob/4028950/data/klimaschutzkonzept-zwischenbericht-co2-monitoring.pdf)

Where does the data for electricity import come from?

The Hamburg power distribution grid of Stromnetz Hamburg GmbH is connected at three points to the transmission grid. At these three points of connection the energy feed-in is measured and recorded every 15 minutes. The curve in the diagram displayed is formed by the 15 minute averages.

Where does the power generation data come from?

The feed-in to larger generating facilities is measured and recorded every 15 minutes. For smaller generating facilities, the energy input is determined on the basis of forecasts and calculations.

What does the display "History of Renewable Energies in Hamburg" show us?

It displays, per district, the installed capacity and number of facilities connected to the Hamburg distribution grid that generate electricity using renewable energy sources.

What is renewable energy? What is the Renewable Energies Act (EEG)?

What is to be classified as renewable energy is regulated by the Renewable Energies Act (EEG). According to this act, renewable energy sources include:

  • Hydropower, including wave, tidal, salt gradient and flow energy,
  • Wind energy
  • Solar radiation energy (e.g. Photovoltaics),
  • Geothermal energy
  • Energy from biomass including biogas, bio-methane, landfill gas, sewage gas as well as from the biodegradable fraction of waste from households and industry.

What does the expansion resulting from the Renewable Energies Act show?

It shows, per district, the installed capacity and the number of facilities connected to the Hamburg distribution grid which generate electricity from renewable sources.

What is decentralized generation?

Decentralized generation comprises all generating facilities that feed the generated electricity into a distribution grid.

What is the installed capacity?

This describes the maximum electrical capacity of a power plant or a generating unit in watt.

How is the forecast data for Energy Weather determined?

The data on the probable feed-in from wind and solar energy is forecast based on historical values and current weather data.

What does the electricity meter show?

The period, in which wind power and photovoltaic systems together produce more than 15 MW of energy, is shown as green.

Where does the school data come from?

The load and generation data is directly measured for each school and then made available in the energy portal.