Revolutionary inverter technology: The end of large power plants?

Revolutionary inverter technology: The end of large power plants?

At a time when wind and solar power plants are increasingly replacing fossil and nuclear power plants, the stability of the power grid is becoming increasingly important. This requires a stable clock for power voltage and frequency, a function that has so far been mainly provided by large fossil fuel mega-power plants and nuclear power plants. Researchers of the ETH Zurich have now developed an inverter control that aims to stabilize the grid. This innovative solution is based on an algorithm that actively stabilizes the grid frequency and limits power transmission in the event of instability.

Simulations of the new control have already achieved very satisfactory results. The algorithm allows the inverters to react directly to turbulence in the grid and compensate for it. Previously, inverters disconnected from the grid independently in the event of failures or instabilities. However, with the new system they can continue to supply power and help stabilize the grid frequency even if faults occur in the grid.

New technologies for the future

The new grid-forming inverters could play a crucial role in the future power grid. ETH engineers have developed algorithms that enable inverters to remain active in the event of grid errors. This means that wind turbines and photovoltaic systems can take over the tasks of classic large power plants by continuously measuring network parameters and adapting in real time. This technology is an important step towards a decentralized power grid without large fossil or nuclear power plants.

ETH Zurich has applied for a patent for the new algorithms and is working closely with industry partners to support the implementation of these technologies. ETH students should carry out their master's theses in industrial companies in order to put these new approaches into practice. This initiative could help reduce the risk of blackouts and promote a sustainable energy future.

A look at the future of energy supply

The development of an algorithm to stabilize the power grid shows how energy systems are changing. The use of inverters with new technologies could be crucial in ensuring grid stability even in times of decentralized energy generation. In addition, keeping old power plants in reserve is no longer considered necessary, which creates space for a flexible and sustainable energy supply.

The challenges and opportunities of the energy transition require continuous research and development in power electronics. As already Fraunhofer ISE emphasizes, flexible and reliable inverter circuits are the key to ensuring a stable energy supply in the future. Combining renewable energy with innovative technologies is at the heart of developing a resilient power grid that meets the needs of a modernized energy environment.