Inner-city trains have resumed after being suspended due to an overhead power issue at Fortitude Valley, but commuters still face frustrating delays across the Queensland Rail passenger network.

In a statement, Queensland Rail said the power issue was reported about 1.40pm.

"We worked to rectify the issue as quickly and safely as possible, with trains resuming through the CBD around 2.30pm," it said.

"As a result, trains across the network are currently experiencing delays of up to just over 60 minutes.

"We apologise to customers for the inconvenience and thank everyone for their patience."