Microgrids meet remote operations’ energy requirements

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As the world’s second largest continent, the vast expanse Africa lends itself to remote operations, often hundreds of kilometres away from civilisation and the hub of infrastructure and supply such as energy.

Industries like mining, minerals and metals often must contend with considerable energy loss or high transportation costs of diesel (for self-generation) due to these vast distances.

The reality is electricity which travels far, encounter conductor resistance which in turn leads to transmission inefficiency. Furthermore, distance also negatively impacts grid stability as power systems require balanced supply and demand to ensure reliable operations.

The cost of electricity for the customer

Transmission infrastructure maintenance, repair and new installations can also be prohibitively expensive when the nearest town is hundreds of kilometres away. This effectively adds to the cost of electricity for the customer.

The good news is advancements in off-grid electrification have opened new possibilities for remote industries. Technologies such as microgrids, which mostly comprise renewable energy such as solar and wind, not only mitigate energy loss but also contribute to the reduction of greenhouse gas (GHG) emissions which contribute to organisations’ net zero goals.

Importantly, remote microgrids can also give back to communities; typically, there are small settlements or towns close to mines and other remote operations which in turn create an economic ecosystem of sorts.

Benefits of utilising microgrids

By utilising microgrids, remote communication can meet their own energy needs, benefiting from stable supply particularly when the closest maintenance crews are kilometres away. Furthermore, microgrids can work together to create a mini-grid and give surplus energy back to the grid,

The benefits of microgrids in remote areas also go beyond its ability to harness and manage renewable energy, offering:

  • Higher resilience – microgrids can generate and store electrical energy independently from any main power grid supply, thereby offering a more resilient approach to maintaining power stability. By having the option of either acting in coordination with the existing grid or as an independent island, the steady, predictable supply of energy greatly minimises operations downtime related to power interruptions.
  • Support for migration from fuel furnaces to electric furnaces – in the glass and steel industries, a sustainability trend towards the electrification of furnaces is helping to reduce costs and to lower global carbon emissions.
  • Innovations such as Electric Arc Furnaces (EAF) and Direct Reduction Iron (DRI) are helping to eliminate the use of high emissions fuel furnaces. Microgrids play an important role in supporting these new processes as alternative and additional sources of renewable energy.
  • Easier management – EcoStruxure Microgrid Operation (EMO) is an on-premises power management solution that ensures stability and reliability of energy supply in all grid conditions.

It is coupled cloud-based energy management solutions such as EcoStruxure Microgrid Advisor (EMA), which provides a web based Human Machine Interface (HMI) for site managers to process the various demand/response requests and optimise output decisions based on energy tariff rates and weather forecast predictions, whilst factoring in user consumption constraints.

Essentially this allows for making the correct decision at the right time for forecasting and optimisation on when to consume, produce, store, or sell energy.

In conclusion

ROI – lower renewable power generation prices make microgrids increasingly cost-effective to operate. Prices are also declining for electric energy storage, allowing for more effective self-consumption of renewable energy sources.

Microgrids offer a truly viable option to remote areas, overcoming a myriad of challenges associated with traditional grid operations to ensure a stable and reliable energy supply whilst also establishing greener, sustainable operations.


Nishandra Baijnath | Systems Architect | Power Systems | Anglophone Africa | Schneider Electric | mail me |


 



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