Danvest technology can be applied as grid supporting system at grids that are not well able to handle the fluctuations of renewable energy. Danvest will balance the power supply as an 'intermediate' system and will help to save fuel.
Danvest mitigates the intermittency issues of renewable energy within a weak grid (voltage drops) and also controls ramp-up rates. Unnecessary curtailments are avoided and the nominal amount of renewables in the energy mix can be enlarged.
And unlike using batteries for spinning reserve, Danvest can operate multiple times per day, runs as long as is needed and does not need to be charged. All Danvest capacity can also double-function as emergency or security power.
Serving the weak ends of a grid?
For balancing reasons it can be smart to install Danvest Power Boxes at the weaker ends of a grid instead of close to the central power plant. In doing so, the 'intermediate' function of Danvest will be dedicated to balance the power supply of the related wind or solar farm. Network operators sometimes even demand such grid stabilizing measures.
In combination with a wind or solar farm It is also possible to create an isolated hybrid load. The maximal load is then equal to the on-site installed Danvest capacity.
Flexible Low-Loading Spinning Reserve
Adding 'Low-loading' spinning reserve
The intermittent character of wind and solar energy can be problematic for power plant operators within a weak grid. When reactive power capacity and/or fast responding spinning reserve is inadequate, load sharing will only be limited possible.
Adding the - Danvest Power Box® -
as 'intermediate' system brings a solution to balance power supply. It is a variant on the Danvest standalone operation:
- As soon as wind and/or solar energy comes up, standing by Danvest generators will START operating.
- During full wind and/or solar energy supply, the Danvest generators are in reverse operation. The Danvest dump load controller helps to secure a fast dynamic load balance between wind and/or solar energy fluctuations and energy demand variations.
- To compensate temporary wind or solar drops, Danvest generators will quickly accelerate from zero to needed load until wind or solar picks up again. When possible, Danvest then slowly shares load with the (slow) central power plant.
- In essence, Danvest 'low-loads' most of the time and provides low LFO fuel consumption figures, The created "stable" hybrid load enables a central power plant operator to shut down large and excessive fuel consuming power generators.
- As soon as wind and/or solar energy starts to fade away, Danvest generators will accelerate to higher loads for about 5 to 15 minutes to provide time for non-spinning large power generators to start up again.
- The Danvest generators then STOP and are standing by for the next cycle. The alternators still provide reactive power as they remain connected to the busbar.
Danvest improves the effective power output of wind and solar farms, while keeping LFO fuel consumption low.
The Danvest approach is based on Danvest wind-diesel technology proven since 1996