The basic idea is to implement an Autonomous Switching System (ASS) that is based on an autonomous interaction between decentrally installed modules in selected secondary substations and a lean control centre in the primary substation. All decentralised modules provide measured values and, furthermore, some of them are equipped with remote controlled switching gears. The central module collects all needed data and generates switching programs derived from the current state of the grid. The possibility of autonomous switching provides dynamic topology reconfiguration which is a new concept of operation.
The following objectives are targeted:
- Integrating an increasing number of Renewable Energy Sources (RES) in the medium voltage (MV) network and underlying low-voltage (LV) networks;
- Achieving a higher reliability and shorter recovery times after grid failures;
- Avoiding unknown overloads and voltage violations;
- Fulfilling the needs of surveillance and remote-control in MV networks;
- Reducing network losses.
The high share and still increasing amount of distributed generation, predominantly wind and photovoltaic, set new challenges to the DSOs in Germany. In order to provide hosting capacity to integrate these resources, huge investments in grid infrastr