The phrase "additional power capacity" is correct and usable in written English.
It can be used when discussing the increase or enhancement of power supply or energy resources in various contexts, such as engineering, energy production, or technology.
Example: "The new facility will provide additional power capacity to meet the growing demands of the city."
Alternatives: "extra power capacity" or "supplementary power capacity".
At the same time, it is necessary to plan for additional power generation capacity or efficiency enhancements to compensate for energy losses resulting from CCS retrofits.
Some 20,000 MW in additional power generation capacity was added last year, with 3.5 million new electricity connections in rural India; also last year, 8,000 new villages got power for the first time, and 93% of Indians in towns and cities have at least some access to electricity.
We find that the decision to build additional power generation capacity was necessary and justified, and that the failure to sooner recognise the need for expansion of the country's electricity generation capacity and subsequent delays in commissioning Medupi and Kusile, likely cost the economy over R110bn in lost production.
By 2020, China must reach a 40-GW nuclear power generation capacity, have 18 GW of additional nuclear power capacity under construction, and ensure that nuclear power takes approximately 4% of electricity generation (i.e., 260 280 billion kWh) (Hou, et al. 2011).
Having additional unused power capacity won't hurt anything (and might come in handy later), but purchasing a generator that cannot provide enough power can lead to many problems down the road.
In theory, solar systems free them from having to invest in additional power-generation capacity.
They argue that they earn no more than they need to do, to pay for necessary investment in additional power-generating capacity and security of supply.
However, meeting the needs of this growing middle class will require significant additional investment in building power capacity and infrastructure.
If more and flexible reactive power capacity is required, additional reactive power compensation systems, such as SVC and STATCOM, should be used to provide voltage support in both steady state and dynamic/transient state.
