The Kenya Power wind solar grid challenge highlights grid instability risks as rapid renewable adoption outpaces storage capacity.
Kenya’s national power utility reported that the rapid adoption of variable renewables like wind and solar is threatening the stability and reliability of the country’s electricity grid.
Kenya Power noted that variable renewable energy now accounts for over 20% of total grid capacity, surpassing the recommended global benchmark limit of 15%.
The utility added that variable renewable energy can make up as much as 34% of the energy mix during daytime peak demand.
“This exposes the national grid to vulnerability when wind and solar output suddenly fluctuates, forcing the system to rely on other power sources to balance the supply,” the utility said in a statement.
This mirrors challenges faced by regions like Europe, where high concentrations of renewable energy on the grid have created similar stability issues.
In other regions, grid operators use curtailment instructing renewable generators to reduce output to maintain frequency stability and prevent transmission bottlenecks.
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Under Kenya’s rigid “take-or-pay” Power Purchase Agreements, however, the utility is contractually required to pay for and accept wind and solar power whenever it is produced, giving it no option to curtail output.
The utility explained that to prevent grid collapses when wind and solar output abruptly fluctuates, it must fire up backup power plants at extra expense a recurring cost that is ultimately passed on to electricity consumers.
To address grid instability, Kenya Power recommended prioritizing investments in baseload renewables, such as geothermal and hydroelectric power, which offer greater reliability than wind and solar.
