Case study

Hydrogen microgrid modelling

We helped our client understand how its network would respond to potential network faults or failures of equipment.


Our customer was experiencing intermittent tripping issues on its renewable energy microgrid, which consisted of hydrogen systems (an electrolyser and a hydrogen fuel cell), a wind turbine, and multiple solar PV sites. The microgrid was used to provide power to an industrial site and surrounding buildings.

Frazer-Nash was asked to investigate the cause(s) of the tripping issues. The system was designed to predominantly operate in an islanded mode, with the generation supplying all the electricity the site needed, but it was also connected to the grid for backup purposes.

Our work

We provided comprehensive analysis of operational data to determine if there were any inconsistencies or obvious problems with the site loads or generators. A series of operational scenarios were developed to test the network at the limit of its capabilities. This included maximum and minimum loading, generation, and various tripping scenarios, where the dynamic response of the network needed to be examined.

Through a combination of static load flow, quasi-dynamic and stability analysis simulations, we were able to fully understand how the network would respond to potential network faults or failures of equipment. This also enabled an element of futureproofing for the network, by helping understand the impact of additional generation and loads, to determine if the network would still operate correctly.



Our Systems Approach, with our modelling and simulation expertise, allowed us to identify one of the key problems on the microgrid, which was the wind turbine importing significant amounts of reactive power. The project has provided increased confidence in the system design, allowing future design changes and additions to the network to be explored, whilst also highlighting the importance of carrying out detailed simulation at the design stage.


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