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Present Power Grid
Today's electricity system called a GRID has since the 19th century been based
on the principle of synchronous function. Starting from Hydro turbine,
Thermal and Atomic Power, those rotating generators automatically
adjust the frequency and voltage based on by the law of Ohm and
inertial energy, once they are connected through the cables.
However, the fundamental characteristics of so-called “renewable
energy” like solar photovoltaic, wind turbine, fuel cells etc.,
are completely different from the conventional generators such as
Hydro, Thermal, Atomic Power.
Most of the renewable energy generators don’t have such synchronous
function, and thus, the trial to have them under GRID hasn’t worked
well. There must be a different structure.
ECONetwork Concept
VPEC has proposed “ECONetwork” (Electricity Cluster Oriented Network,
network of ProSumers), which could mutually coexist with GRID, striving
for a better total system performance.
The introduction of renewable energy so far has been a“pinpoint” type
approach and the reverse energy tide flow to GRID is mandatory,
if excess occurs. The other fundamental principle of today’s GRID
is one way flow of energy from generators to demand. The more the
reverse tide flow, the more the deviation in frequency and voltage
could occur, and thus massive deployment hasn’t been done.
ECONetwork is designed to combine local generation and consumption, and only the excess or shortfall of energy is transferred. The cluster is composed of hybrid generators, renewable energy, micro hydro and so on, together with electric storage and power router. Among the clusters, the excess and shortage are transferred bi-laterally. Compared with a GRID where all the generated energy moves over long distances and all of the time, small energy moves in a short distance, intermittently, using ECONetwork, we can expect to kill two birds with one stone, i.e., achieve significant green house gas reduction through massive deployment of renewable energy sources, and achieve conservation of energy. In addition, it is the kind of system which expands with the “addiction” of the standardized “clusters”, therefore, it requires smaller initial investment in electricity infrastructures and lower cost in addiction.
