A council delegation will travel to Westminster next week to give evidence to the Northern Ireland Affairs Committee on the impact of the closure of Kilroot power station outside Carrickfergus.
The committee is investigating the likely consequences on Northern Ireland's power supply of the plant's shutdown and an expected reduction in capacity at Ballylumford.
The delegation from Mid and East Antrim Borough Council will include mayor Paul Reid, chief executive Anne Donaghy, head of policy, research and external affairs Louise Kennedy. They will be accompanied by East Antrim MP Sammy Wilson.
In January Kilroot's operator AES announced the station would close after it failed to be selected for a large chunk of energy provision as part of the new all-island integrated single electricity market.
Around 240 jobs will be lost due to the closure, while 30 will go at Ballylumford.
AES UK & Ireland president Ian Luney has said he was disappointed with the tender failure, and as a result both stations cannot continue to "cover their fixed costs".