PV HYBRID SYSTEMS FOR THREE REMOTE HOUSES

Cel

This project demonstrates three photovoltaic hybrid (wind, Diesel, gas) systems, with continuous AC energy supplied by an inverter. All three sites are far away from the grid.
The system in the Langer-house works perfectly, satisfying the seasonal needs of the Langer family. The final yield over nine months is 1.3 kWh/(d x kWp) at a reference yield of 3.5 kWh/(d x kWp). The battery and the inverter have both high efficiency.
The Rotwandhouse system is operating since September 92. Of the 11.3 MWh totally produced in 1993 3.4 MWh are of pv origin, 2.4 MWh of wind origin and 5.5 MWh are Diesel generated. The final yield for the pv supply was 1.6 kWh/(d x kWp) at a reference yield of 3.8 kWh/(d x kWp).
At Bonago, operating since September 1991, the consumption is much higher than expected. The pv systems works correctly, but the motor generator fraction is high.
From the whole project many valuable lessons were learned, especially concerning :
* involvement of the users from the very planning,
* adequate dimensioning and extension possibilities,
* follow-up and maintenance,
* lightning protection.
Three different subsystems at three different sites.
A common feature is newly developed indicator of the state of charge of the battery. This indicator allows economic energy management and optimized use of the auxiliary generator. All three subsystems have the same type of special inverter (ISE design) to supply 220 V AC.
In the new version of the ISE inverter it is sufficient to have one battery with the full tension of 162 V; the other dc tensions, 84, 42, 24 and 12 V are generated by a DC/DC converter. (Patented system).
1) The Grimmelshofen system, 1.76 kWp, on a private house, a former railroad signal house, has a Diesel/gas auxiliary generator. The PV arrays are mounted on the roof of the house.
2) The Rotwandhaus system, 5 kWp, on a guesthouse in the bavarian Alps near Spitzingsee, has a wind auxiliary generator (20 kWp turbine). The PV arrays are mounted on the roof.
3) The Bognago system, 4.32 kWp, on a site of several isolated guest huts, has a hydro electric generator, 5 kW for the main house supply (household appliances, water pump). This system has also a Diesel/gas auxiliary generator. Nr. of subsystems : 1 + 1 + 1
Power of subsystems : 1.76 + 5.1 + 4.32 kWp
Total power : 11 kWp
Backup : Diesel (+wind + hydro)
Number of modules : about 240 TST (AEG)
Module description : AEG PQ 36/45 and Italsolar 36 SL/A
Connection : 12 in series
Support : On the roof (Rotwandhaus), roof integrated (Langer and Bognago)
Max power tracker : none
Charge controller : special
Battery : HAGEN
Batt. (V) : 162 (168 Langer)
Capacity (Ah) : 1 x 75 Ah (OGI) and 1x37.5 Ah (OpzS) at 168 V for Langer house, 400 Ah at 162 V, type Hagen OCSM,
for Rotwandhaus, 200 Ah at 162 V,
type FIAMM PMF, for Bognago.
Inverter : special (ISE design transformerless inverter with DC/DC converter for all three systems, 10 kW.
Load description : Household appliances, Dishwater, washing machine, refrigerator, freezer, TV, lights, and water pump.
Monitoring : Data logger for 11 main parameters with integrators for mechanical backup.

Program(-y)

ENG-ENDEMO C - Programme (EEC) of demonstration projects and industrial pilot projects (EEC) in the energy field, 1985-1989

Temat(-y)

7.1 - PHOTOVOLTAIC

Zaproszenie do składania wniosków

Data not available

System finansowania

DEM - Demonstration contracts

Koordynator

FRAUNHOFER IAF

Wkład UE

Brak danych

Adres

Tullastr. 72
79108 MÜNCHEN
Niemcy

Linki

Strona internetowa

Koszt całkowity