Illustration/ key visual for ‘Grid ancilliary solutions' showing a synchronous condenser and two wind turbines, four photovoltaic panels and three power poles in the back.

Grid ancillary solutions

Modern energy systems are being impacted by the reduction of nuclear and fossil power generation as well as the increase of renewable power generation. These factors can cause stability problems in the HV-grid (reduction of short circuit power/ inertia and voltage dip stability) which might result in a blackout. In order to prevent this, power stations with black start capabilities are required, while synchronous condensers can supply power during short circuits, and ensure permanent dynamic voltage and reactive power control. 

Synchronous condenser

A synchronous condenser is a generator without a prime mover from a gas or steam turbine. It stabilizes the grid in changing reactive power demands. The rotating mass and the dynamic generation of reactive power stands for the high advantages of this product. The main benefits of a synchronous condenser are frequency stabilization and power supply during short circuits. 

Any existing power plant generator type can be converted into a synchronous condenser. It can supply the grid with short circuit power and ensure permanent dynamic voltage and reactive power control. Synchronous condensers are designed to stabilize frequency and maintain voltage even over long distances.

They can generate electricity during dynamic peak demands and are able to build up the grid after a black-out. The project time for converting a plant is usually less than 12 months. The solution allows the use of existing assets and offers a very short return on investment (ROI).

SGen-100A-2P Generator, 3/4 Ansicht

Stabilize the grid in changing reactive power demands

Your benefits

Benefit icon for minimum costs

Minimum costs
 due to re-use of the existing generator and relevant auxiliary systems. Written-off assets can be reactivated.

Benefit icon for extended lifetime

Extended lifetime of a power plant generates additional revenue.

Benefit icon for decreased danger of blackouts

Decreased risk of blackouts as grid is in an optimum range of operation 

Black start and black grid restoration

Black start capabilities can be built by using an independent power source to restore the plant's auxiliary systems without an external source of supply.

Suitable technologies are:

  • Small open cycle turbines
  • Gas engine generators
  • Diesel generators
  • Batteries and hybrid solutions
3D rendering of battery systems for back-up power (storage landscape detail view)

The process begins with a feasibility study in which the main generator capabilities and grid requirements are assessed. The next steps include integrating the new power source into the plant and making necessary modifications to the existing installation.

Technical benefits

Benefit icon for start-up power plant

Availability to start-up
the power plant without an external power supply

Benefit icon for  restoring power to the grid

Capability to help restore power to a national grid in the event of a total or partial shutdown

Benefit icon for provision of start-up power

Provision of start-up power to other power stations as the system restoration progresses

Commercial benefits

Benefit icon for additional revenues

Additional revenues 
received directly from the TSOs can help increase plant profitability through additional functionality and revenue opportunities and avoid the closing down of the plant

Benefit icon for mitigation of production losses

Avoidance of huge production losses
 due to blackouts and equipment being unavailable


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