Internal fault in setting up power equipment might be responsible for power outage during Jatiya Sangsad (JS) session in last September.
A high-powered four-member team led by chief engineer of state-owned Power Grid Company of Bangladesh Ltd (PGCB) Md Rafiqul Islam found out the information during an investigation.
During the probe, the national load disperse centre (NLDC) found out that 400MW Meghnaghat power plant and 100MW Ghorasal power plant shut down on September 11 due to an explosion of steam turbine of the Meghnaghat power plant.
Then, the voltage fluctuation occurred only for 0.08 second.
But the voltage fluctuation was not responsible for tripping the PGCB network at any location in Dhaka, it found.
Besides, the Dhaka Electric Supply Company (DESCO) sub-station-2 at Agartala 33/11kv line to Sangsad Bhaban feeder and other feeder load were normal during the outage at Parliament.
The team suggested forming a committee comprising experts for examining the protection setting, change-over setting and internal equipment of parliament.
Then, the team will also review the internal setting of power lines and its equipments, it said.
It also suggested repairing the 33kv Sher-e-Bangla (Sangsad) feeder. The PGCB submitted its probe report to the ministry of power and energy, an official concerned said.