THE Energy Commission is conducting an investigation to identify the cause of power supply disruption in several areas in Peninsular Malaysia on Wednesday. 

The commission said in a statement today that the investigation is being conducted to ensure that a similar incident does not recur, and to propose improvement measures.

“The Energy Commission views the electricity supply outage that occurred in most states in Peninsular Malaysia on July 27 very seriously,” the statement read. 

The commission also said that action under the provision of the Electricity Supply Act 1990 and the Electricity Regulations 1994 can be taken against any party if any related offences are detected. 

Preliminary investigations revealed that the outage occurred because of a trip at the North Yong Peng 275kV main intake substation in Johor, following damage to some equipment at the station. 

“The incident also caused several delivery lines from other substations to be affected, which resulted in an outage along the national grid. 

“The supply disruption also caused the national grid to suffer frequency drops, and the automatic load shedding scheme was activated in several areas where electricity supply was automatically cut off to stabilise the grid frequency,” the commission said. 

The commission said Tenaga Nasional Bhd (TNB) managed to restore supply in stages after taking into consideration the grid’s stability. The restoration process began at 12.56pm and was completed in two hours and 21 minutes. 

TNB confirmed on Wednesday that electricity supply was disrupted in several areas in Peninsular Malaysia and said it was due to damaged equipment at the North Yong Peng main intake substation in Johor. 

Petaling Jaya, Cheras, and Bangi in the Klang Valley; Bayan Lepas and Seberang Jaya in Penang; Panchor in Johor and Bandar Indera Mahkota in Pahang were among the areas hit by the power outage that began at 12.39pm. – Bernama, July 29, 2022.