Power Generating Module (PGM)
European Union Electricity Market Glossary




Power Generating Module (PGM) is either a Synchronous Power Generating Module or a Power Park Module (PPM) (Article 2(4) of the Network Code on Requirements for Grid Connection of Generators (NC RfG)). 


NC RfG introduces four categories of PGMs:


Type A Power Generating Modules,


Type B Power Generating Modules,


Type C Power Generating Modules,


Type D Power Generating Modules.


The categories are defined by the voltage level of grid connection and the installed capacity of a PGM.


As ENTSO-E guidance document for national implementation for network codes on grid connection, Selecting national MW boundaries, Draft for consultation 1 July - 15 August 2016, 30 June 2016, underlines, categories of PGMs are introduced by following the principle of subsidiarity and proportionality.


The capacity thresholds are defined as limits of capacity threshold which define the maximum lower limit of each category leaving its final determination to the national level.


Type B, C, D thresholds need to be determined at national level regarding the following points:

- maintaining requirements which already exist from previous national regulations and have proven their need and benefit through operational experience in normal and emergency network situations,

- taking into consideration the national generation portfolio characteristics and its evolution (e.g. level of penetration of renewable energy sources),

- taking into consideration national system characteristics and its evolution (e.g. rural/urban conditions, density of load and generation),

- ensuring that requirements needed for guaranteeing security of supply will be fulfilled considering the peculiarities of each national system (e.g. dependency on power imports from abroad).


The aforementioned ENTSO-E guidance document of 30 June 2016 evidences the following key rationales for choosing the pertinent thresholds:


- A/B threshold: the need of fault-ride-through (FRT) capability of small generation units if 
otherwise the loss of a large volume of generation in case of a fault on the 
transmission network would jeopardize system security, and the need to increase observability of small generation units.


- B/C threshold: as regards frequency control capability of renewable energy sources (RES) generation: in case of high volumes of RES generation a large amount of conventional generation resources will be displaced and hence not be available to manage system security during certain periods (in these cases, the need of additional capacity to control frequency must be evaluated, regarding the amount needed and the expected size of new generation units).


- C/D threshold: need of FRT capability of large PGMs and units connected to typically the highest voltages of the grid, to guarantee the stability of the grid.


Winter Energy Package (Annex to the Proposal for a Regulation of the European Parliament and of the Council on the internal market for electricity (recast), 30.11.2016, COM(2016) 861 final 2016/0379 (COD)) provides for the regional outage coordination of Power Generating Modules.


This task is entrusted to Regional Operational Centres (ROCs).


Pursuant to the said draft each ROC would perform outage coordination "in order to monitor the availability status of the relevant assets and coordinate their availability plans to ensure the operational security of the transmission system, while maximizing the capacity of the interconnectors and/or the transmission systems affecting cross-zonal flows."


Each Regional Operational Centre would also maintain a single list of relevant grid elements, Power Generating Modules and demand facilities of the system operation region and make it available on the ENTSO for Electricity operational planning data environment.


Further, each ROC would carry out the following activities related to outage coordination in the system operation region:
(a) assess outage planning compatibility using all Transmission System Operator's (TSOs') year-ahead availability plans;
(b) provide the transmission system operators of the system operation region with a list of detected planning incompatibilities and the solutions it proposes to solve the incompatibilities.






Last Updated on Saturday, 04 February 2017 12:45


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