Test 1 : Testing the integration of a composite CHP system for market interaction, “office buildings” segment, Grenoble France


The first test carried out within the EU-DEEP project, focusing on a single Distributed Energy Resources (DER) system integration, had several objectives:
to assess the potential of the “office buildings” market segment in Northern Europe, identified as one of the most promising segments for DER;
 to design a fully integrated system comprising all the different DER components;
to test and assess the corresponding cost of the automatic islanding–reconnection to the
network in case of grid failure.


How to operate a composite DER system as a single entity for easier interaction with the market?



A fully integrated system was designed using the different DER components (generator using a gas engine, UPS, control systems) that make DER interactions with the power markets easier

The integration enabled the system to be considered as a single control box, interacting with external sources of information:


  • Powernext (electricity prices).
  • Weather forecast.

A configuration of automatic islanding–reconnection was developed and tested with success

The engine decoupling protection was controlled by the DER controller. In the event of a grid failure, the decoupling protection came into operation to bring the DER system into islanding mode. The DER controller switched off the interruptible loads and fed the critical loads. If the engine was off, the loads were fed by the UPS before the engine fully started up. The decoupling protection continuously checked the presence of grid voltage and frequency. When the grid was back to steady-state operation the DER controller resynchronised the engine with the grid.
This automatic reconnection to the grid was only possible if the different DER system components (i.e. engine, decoupling protection, UPS, etc) were integrated with an appropriate communication strategy. Thus the DER controller played the role of master control and communicated with all components using MODBUS protocol. The DER controller managed the engine control system, switched the different loads and managed the decoupling protection. The DER controller was also the interface between the DER system and the power markets.
The successful integration of the different components was a necessary step for the control system (Siemens DEMS®), to be tuned for the next three, more complex, experiments (see next cards).

Siemens DEMS scheme of the experiment

Expand results


Topic of interest for

  • Energy Producers, Retailers and Service Providers

  • Consumers ajnd Energy Facility Managers

  • Investors

  • Manufacturers



  • Marc BERGERGDF SUEZWP4 & 5 Leader