1. Transposition of European Network Codes
Asset protection and system robustness
Protection and Control requirements
Working Group Belgian Grid
Felicia Lazar, Elia, Asset Management, Sec. Sys
26/09/2016

2. Protection and Control requirements in RfG Network code

3. Protection and control starting from type B PGMs
Protection and control starting from type A PGMs
Connection conditions
Active power ramping after connection
Protection and control starting from type B PGMs
Protection for internal faults should be selective in relation with FRT capabilities: example under-voltage protection settings.
The protection schemes and settings necessary:
a. to protect the network, taking into account the characteristics of the power generating module will be defined by the relevant system operator.
b. for the power generating module and the network shall be coordinated and agreed between the relevant system operator and the power generating facility owner.
Changes for these protection schemes and settings shall be agreed.
The control schemes and settings necessary for system stability shall be coordinated and agreed between the TSO, relevant system operator and PGM
The evidence of an agreement on the protection and control settings at the connection point could be requested by the relevant system operator to be present in the PGM Document.

4. Protection and control starting from type C PGMs
Robustness requirement: PGM shall be capable of remaining connected to the network during single phase or three-phase auto-reclosure on meshed network lines. The details will be subject of agreement.
System restauration related requirement: in case of disconnection of the power generating module from the network, the power generating module shall be capable of quick re-synchronisation (in accordance with the protection strategy agreement).
General management requirement: To be provided the PGM protection models upon agreement (relevant system operator and the power generating facility owner).
Protection and control for type D PGMs
General system management requirement: the power generating module shall be equipped with the necessary synchronisation facilities;
The Energisation operational notification EON will be issued conditioned by the existence (among other documents) of an agreement on the protection and control settings relevant to the connection point between the relevant system operator and the power generating facility owner

5. Protection and Control requirements in DCC Network code

6. NC DCC: Protection & Control
For the transmission connected demand facilities, transmission connected distribution systems and distribution system connections
Control for system stability or for emergency actions schemes and settings;
Disconnection demand for system defence and reconnection demand schemes
Electrical Protections schemes and settings
Agreement documents on protection schemes and settings
Agreement documents on control schemes and settings
Simulation models: including protection models
Synchronization performances
For equipment providing demand side response active power control, reactive power control and transmission constraint management
Special requests in the control domain

7. Protection and Control requirements in HVDC Network code

8. NC HVDC systems and DC connected power park modules
Fault ride through capabilities and performances of the protections dedicated to internal faults
Coordination and agreement of schemes and settings necessary to protect the network
Coordination of protection schemes relevant for the HVDC system and the network
Agreement documents on protection schemes and settings and control schemes and settings relevant to the connection point to be included in the Operational notification procedures

9. Protection and Control requirements in Guideline on electricity transmission system operation Network code Part 1. Operational Security NC OS Part 2. Operational Planning and Scheduling NC OPS Part 3. Load Frequency control and reserves LFC&R

10. Protection Part 2 Title1 Chapter 6 Article 36
Each TSO shall operate its transmission system with the protection and backup protection equipment
At least once every five years, each TSO shall review its protection strategy and concepts and update them where necessary to ensure the correct functioning of the protection equipment and the maintenance of operational security.
After a protection operation which had an impact outside a TSO’s control area including interconnectors, that TSO shall assess whether the protection equipment in its control area worked as planned and shall undertake corrective actions if necessary.
Each TSO shall specify setpoints for the protection equipment of its transmission system that ensure reliable, fast and selective fault clearing, including backup protection for fault clearing in case of malfunction of the primary protection system.
Prior to entry into service of the protection and backup protection equipment or following any modifications, each TSO shall agree with the neighbouring TSOs on the definition of protection setpoints for the interconnectors and shall coordinate with those TSOs prior to changing the settings.

11. Special Protection Schemes
Part 2 Title1 Chapter 6 Article 37
Requirements for TSOs when applying SPS
- operational performances: selectivity, reliability, effectivity
- evaluate in the design stage the impact of the SPS incorrect operation
- verify that the special protection scheme has a comparable reliability to the protection systems used for the primary protection of transmission system elements;
- compliance with the transmission system security limits
- coordinate special protection scheme functions, activation principles and setpoints with neighbouring TSOs and affected transmission-connected DSOs, including closed distribution systems and SGUs.
The subject of the Special Protection Schemes will be treated by the topic “Emergency procedures”.

12. Protection and Control requirements in Network code on Emergency and Restoration - awaiting validation from EU members

13. System Defence Plan/Special Protection Schemes
Design of the System Defence Plan
The system Defence Plan shall include at least the following technical and organisational measures :
System Protection Schemes including at least:
i. automatic under-Frequency control scheme;
automatic over-Frequency control scheme; and
automatic scheme against Voltage collapse.
The subject of the Special Protection Schemes will be treated by the topic “Emergency procedures”.