Nigeria, Sept. 29 -- The Nigerian Independent System Operator (NISO) has raised concerns about the potential impact of the dispute between the Petroleum and Natural Gas Senior Staff Association of Nigeria (PENGASSAN) and Dangote Refinery on the nation's power sector.

The dispute has led to directives to suspend the supply of crude oil and natural gas to the refinery.

NISO in a statement signed by its management on Sunday said the national grid relies heavily on gas-fired generation, and any sustained disruption in gas supply could constrain generation capacity, affect system operations, and undermine the stability and reliability of electricity supply across the country.

NISO said it is considering measures to mitigate total grid colla...