Abstract
The energy scenario is experiencing substantial change due to increasing displacement of conventional forms of generation at transmission network level by renewable energy sources (RES) at distribution level. At the same time, consumers have started to participate in the electricity market as prosumers (both producer and consumer) or demand side response (DSR) entities. These partly fluctuating RES and DSR units at distribution level will change the behaviour of entire system, challenging the balance of load and generation in the grid at all time. Obviously, each distribution/transmission system operator is responsible for its own grid only, but to operate the grid properly in the new emerging scenario, it is important to know what is happening in part of the surrounding grids too. The Transmission system operator (TSO) has the primary responsibility of grid balance but it has no direct control over RES and DSR at distribution grid as of today. In general, TSOs also do not have the desired observability levels of relevant components of the distribution network such as medium voltage lines, substations etc. In future, TSOs using traditional observability analysis approach, as a fundamental tool to ensure system security, might be at risk. From a DSO (distribution system operator) perspective, the use of transmission system’s observability information has always been very limited and unnecessary until now. However, in the new scenario, the information exchange between TSOs and DSOs allows them to utilize the increasing penetration of DERs and DSRs more effectively providing ancillary service and local control. This trend is expected to grow more in future so it demands revision of the traditional way of TSO - DSO interaction. This work will explore the current practice of interaction between TSOs and DSOs, investigate the specific grid operation challenges, and identify the possible future ways of cooperation in smart grid. The analytical analysis in European perspective considering Denmark as an example is presented.
Original language | English |
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Title of host publication | Proceedings of CIGRE Symposium Aalborg 2019 |
Number of pages | 10 |
Place of Publication | Aalborg |
Publisher | CIGRE (International Council on Large Electric Systems) |
Publication date | Jun 2019 |
Publication status | Published - Jun 2019 |
Event | CIGRE Symposium Aalborg 2019 - Aalborg, Denmark Duration: 4 Jun 2019 → 7 Jun 2019 |
Conference
Conference | CIGRE Symposium Aalborg 2019 |
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Country/Territory | Denmark |
City | Aalborg |
Period | 04/06/2019 → 07/06/2019 |
Keywords
- TSO-DSO interface
- Interoperability
- Grid congestion
- Ancillary services
- Observability area
- Information exchange