NGC reviews security standards, recommends holding status quo

The National Grid Co. (NGC) in England has finished a review of transmission security standards for the Office of Electricity Regulation (OFFER).

The review, requested by OFFER, examined several alternatives to existing standards using cost-benefit and probabilistic approaches.

NGC`s report indicates that generators have expressed interest in moving to a cost-benefit approach for planning and operating the high-voltage electricity network, but the majority of those experiencing supply, including major energy users and regional electricity companies, prefer to remain with existing standards.

“The review has shown that the existing planning and operating standards continue to provide good security, which many customers would be reluctant to lose,” said Eric Eunson, NGC power system development general manager. “The alternatives identified could result in a significant reduction in operating costs, but these benefits would be offset by an increase in the risk of loss of supply.”

The review identified improvements to be included in existing standards, including customer choice and ensuring compatibility with other industry documentation.

Existing standards require NGC to secure the system against a single circuit fault, double circuit fault, busbar faults, concurrent single circuit faults and loss of transformers.