1. Demand side management - Measurement description



In the frame of Renewable Energy Remote Laboratory you can control remotely electrical consumers of the local, renewable energy system. The electrical energy produced by the different technologies based on renewable energy sources in the laboratory is stored in batteries and used by direct current demand on 24 VDC and alternating current demand on 230 VAC. The consumers are able to switch on and off, in the remote laboratory there are possibility for changing the switches set points for one day in 1-1 hours periods and analising the system. (Coming soon. Remote laboratories are under construction.)
The DC grid receives energy from the batteries via the maximum power point controller of the solar cells. In case of low battery voltage the grid is electrically dead, changes in the switches will not cause any electrical demand. The controllable demand in the laboratory models the eletrical consumers of a household.

The direct current consumers on 24 VDC:
  • DC plug (switch 1), using USB connection for LED lights load
  • 100 W lamp on left side (switch 2),
  • 100 W lamp on right side (switch 3),

The alternating current consumption supplied by sinus shaped 230 VAC inverter:
  • maximum 1200 W inverter (switch 4), delivering power to the followings:
    • computer for data collecting and supervisory system,
    • measuring meters,
    • controllers.

If the inverter stops producing 230 VAC (it is switched off or the voltage level of the batteries is below a limit, so protection switched it off), the AC electric consumers change from the local, "green" grid to the conventional grid of the building.
The aim of a remote measurement made by students is implementing and analising the optimal operation according to multiple conditionalities. The conditions (extendable):
  • achiving maximum of local energy usage during a given period,
  • besides defining different consumer flexibilities,
  • besides different intensity in battery usage,
  • besides different type of tariff structure.