Please use another Browser

It looks like you are using a browser that is not fully supported. Please note that there might be constraints on site display and usability. For the best experience we suggest that you download the newest version of a supported browser:

Internet Explorer, Chrome Browser, Firefox Browser, Safari Browser

Continue with the current browser

Siemens launches Frequency Stabilizer to support power grids in milliseconds

The picture shows the Frequency Stabilizer to support power grids.

The missing link in the energy transition

Depending on the country, the frequency of an AC grid remains at a constant 50 Hertz (in Europe, for example) or 60 Hertz (in North America, for instance) when the quantity of electricity generated and consumed is in balance. Renewable energy, however, is only available in variable quantities, depending on the sun and wind. More and more producers are feeding power locally; the distances between the power generation site – on the open ocean, for example – and the main points of consumption inland often amount to hundreds of kilometers. If a large consumer is then added or removed, the frequency in the grid, begins to fluctuate. An underfrequency occurs, for example, if the load abruptly increases or power plant capacity is suddenly absent. "In the near future, power management systems alone will no longer be able to compensate for imbalances in power grids," says Mirko Duesel, CEO Transmission Solutions at Energy Management. "The innovative and economical SVC Plus FS solution is the missing link that can ensure the grid stability we all need in this era of transition to a new energy mix."
Greater inertia and more robust grids

Large conventional power plants have long played a key role in maintaining a power balance. With fossil fuels, the power can be increased and decreased as needed. The kinetic energy stored in the flywheels of generators, for example, can quickly equalize small deviations. The grid is in balance again within seconds. Experts call the energy stored in the generator's rotating masses "grid inertia." However, fewer and fewer large power plants are available to maintain the inertia. At the same time, more and more renewable energy is being fed into the grid. Stored-pump power plants can only react slowly to frequency drops. "To avoid costly outages, some power plants switch to the inefficient standby mode," says Alexander Rentschler, Head of Product Lifecycle Management at Siemens Transmission Solutions. "The SVC Plus FS will make grid operators independent of this. The solution makes the grid more robust, increases its inertia, and thus builds a bridge for the energy transition."
The benefits of supercapacitors store energy.

Their charging mode is electrostatic, which means that electrons are moved instead of molecules. As a result, they are charged and discharged much faster than storage batteries. Siemens buys the supercapacitors from its Californian partner Maxwell Technologies and is responsible for managing the static var capacitors and supercapacitors, connecting to the grid, and integrating the system. The SVC Plus FS takes up approximately two-thirds less space in comparison with a battery storage solution at the reference power of 50 Megawatt.

Siemens Energy is one of the world’s leading energy technology companies. The company works with its customers and partners on energy systems for the future, thus supporting the transition to a more sustainable world. With its portfolio of products, solutions and services, Siemens Energy covers almost the entire energy value chain – from power generation and transmission to storage. The portfolio includes conventional and renewable energy technology, such as gas and steam turbines, hybrid power plants operated with hydrogen, and power generators and transformers. More than 50 percent of the portfolio has already been decarbonized. A majority stake in the listed company Siemens Gamesa Renewable Energy (SGRE) makes Siemens Energy a global market leader for renewable energies. An estimated one-sixth of the electricity generated worldwide is based on technologies from Siemens Energy. Siemens Energy employs around 91,000 people worldwide in more than 90 countries and generated revenue of €28.5 billion in fiscal year 2021.

Read more


Christina Huemmer

Siemens Energy