Does anyone have experience adding or retiring generators to increase system flexibility?

I’m looking for examples about approaches to add or retire generators to increase system flexibility.

You can review the Clean Power Hub’s background on this subject, and then use this thread to post your experiences and/or questions.

In Mongolia, our power and heat demands are mostly supplied by CHPs in capital city, Ulaanbaatar. Currently, we have been facing issue of replacing or expanding of the aged CHPs that were built back in 1960’s-1980’s.

From a reliability and an efficiency perspectives, it is better go for new CHPs in outside of the city, but from an economic perspective, expanding the CHP by replacing generators with new ones is considered a feasible way to supply growing demand for short time using its existing infrastructures such as transmission lines substations and central heating systems.

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Hi Jambaa,

Thanks for your insights—and welcome to the Clean Power Hub Community.

This is very interesting. Are you able to share any more about how these decisions are made, and what kind of analysis goes into them? In your opinion, at what point would it make sense to develop new CHP generation outside of Ulaanbaatar?

Thanks again, and All the best,


Hi Matt,
The decisions usually were made based on financial capability of the Government at time, since it quite difficult to invest into new CHP, retrofitting the main parts of the existing CHPs are easiest approach to make a decision on.

There is a plan to build a new CHP outside of UB, it is challenging in terms of finance and technical issues but doable since we have central heating systems the new CHP is supposed to be built to its main heating consumer, the capital city, to cut investment cost by installing a shorter heat pipeline.

However, there are two big power plant (not CHPs) projects going on in near UB and southern Mongolia.

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