Tokyo Gas, develop system for optimizing co-operation of ENEFARM & PV

The system to be developed controls the voltage of the solar power or PV generator without decreasing the amount of power generated by the generator in a situation where excessive power from the PV generators unexpectedly increases.

In Japan, the sales of ENEFARMs started on this May, and general homes which buy and install PV generators are soaring in number.
In this situation, those homes, which want to buy both the ENEFARM and the PV generator are not small in number.

As known, when a large amount of electric power flows into the power system (power grid system), problems will occur for sure in the power system. For example, the power system voltage rapidly increases, and the power system frequency shifts from the original one.
The PV generator has a function to automatically control the amount of generated power and to suppress the amount of electricity flowing into the power system.

Where the function operates on the excessive power generated, as the number of the PV generators increases, the amount of power generated by each PV generator is more suppressed. As a result, the amount of excessive electric power to be bought by the electric power company also decreases. Decrease of the electricity to be bought will discourage the adoption of the renewable energy generators.

To cope with the problem, Tokyo Gas proposes a new control system, which makes better use of the inverter contained in the ENEFARM for voltage control purpose.

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ENEFARM = common name of every type of residential fuel cell
co-generating system manufactured in Japan.