Greece
Voltage Control – Multi-Level Market Model
1. Description of the Use Case
1.1. Name of the Use Case
| ID | Area /Domain(s)/Zone(s) | Name of the Use Case |
|---|
| 1 | national / regional, | Greece |
1.2. Version Management
| Version No. | Date | Name of author(s) | Changes | Approval status |
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| 1 | 2019-07-23T00:00:00 | HEDNO, | none | approved |
1.3. Scope and Objectives of Use Case
| |
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| Scope | Energy markets: Day Ahead (DA), Intraday (ID), Near Real Time |
| Objective(s) | • To ensure non-discriminatory access to the market for all agents that provide grid services. |
| • To enable coordination and information exchange between system operators in order to improve efficiency of the system. | |
| • To enable the TSO to use the flexibility provided by the resources connected to the distribution system for voltage control, while respecting distribution system constraints. | |
| • To ensure a secure operation of the transmission and distribution system. | |
| • To minimize RES curtailment due to security reasons. | |
| Related business case(s) | n/a |
1.4. Narrative of Use Case
Short description
The UC describes the steps that are followed to eliminate voltage violations in the transmission and distribution system using flexibility provided by resources connected to both systems. The voltage level in transmission and distribution systems is permanently assessed and monitored by the ΤSO and DSO respectively, in order to decide on actions for keeping voltages of their systems within the admissible range.
Complete description
This UC describes the actions that are carried out in case of anticipated voltage violations in transmission and distribution system in order to keep the voltage level in acceptable boundaries. Flexible resources connected to the transmission and distribution system can provide flexibility to system operators to eliminate voltage violations through a market mechanism. Active and reactive power control is considered. The voltage control shall be local as voltage is a local need for power grids. This is an important activity that is likely performed on a permanent basis to keep the grid voltage within normal ranges.
In addition, it has to be ensured that the activation of flexible resources in the distribution network by the TSO would respect distribution system constraints. A Cooperation and information exchange between the DSO and TSO are crucial for eliminating voltage violations in the most efficient way, while respecting distribution and transmission system constraints.
| ID | Name | Description | Reference to mentioned use case objectives |
|---|
| 3 | Cost of R&I solution VS grid alternative solution | Cost of R&I solution VS grid alternative solution | GR-1a, |
1.6. Use case conditions
| Relation to other use cases |
|---|
|
| Level of depth |
| Prioritisation |
| nice to have |
| Generic, regional or national relation |
| national |
| Nature of the use cases |
| business |
| Further keywords for classification |
| n/a |
2. Diagrams of Use Case
3. Technical Details
3.1. Actors
| Actor Name | Actor Type | Actor Description | Further information specific to this Use Case |
|---|
| TSO | ENTSO-E | None | |
| DSO | None | None | |
| FPS | None | None | |
3.2. References
| No. | References Type | Reference | Status | Impact on Use Case | Organistaor / Organisation | Link |
|---|
| no reference has been used | none | n/a | n/a | | n/a |
4. Step by Step Analysis of Use Case
4.1. Overview of Scenarios
| No. | Scenario Name | Scenario Description | Primary Actor | Triggering Event | Pre-Condition | Post-Condition |
|---|
| 1 | Day-ahead market | Coordinet platform and functionalities interaction in national energy market | | Day-ahead market | | |
Notes
4.2. Steps – Scenarios
| Scenario Name: |
|---|
| Day-ahead market |
| Step No. | Event. | Name of Process/ Activity | Description of Process/ Activity. | Service | Information Producer (Actor) | Information Receiver (Actor) | Information Exchanged | Requirements, R-ID |
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| 1 | TSO and DSO invoke RES and Load forecast | share info per substation | TSO and DSO assess voltage level | get | DSO | TSO DSO | | |
| 2 | TSO asses voltage level | power flow simulation | DSO with TSO decide next grid reconfiguration | execute | DSO | TSO | | |
| 3 | voltage deviation | flexibility assessment | TSO and DSO assess the required amount of flexibility | create | TSO DSO | TSO DSO | | |
| 4 | flexibility assessed | flexibility request | DSO request offer from day-ahead market | get | | DSO | | |
| 5 | flexibility requests | market clearing | Market operator receive from DSO the eiligible bids | execute | DSO | | | |
| 6 | flexibility assess | bids aggregation | TSO request offers from day-ahead market, DSO aggregates the remainng bids according to the interested location | create | DSO | TSO | | |
| 7 | flexibility bids | market clearance | TSO receive the aggreggated bids, market is cleared | execute | TSO | | | |
| Information exchanged ID | Name of Information | Description of Information Exchanged | Requirement |
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6. Requirements (optional)
| Category Identifier | Name | Description | mRID |
|---|
| Req_ID | Req_Name | ‘Voltage Control – Multi-Level Market Model’ | |
| Identifier | Name | Description | mRID |
|---|
| n/a | n/a | n/a | n/a |
7. Common Terms and Definitions
| Key | Value | Refers to Section |
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