NAS
Sodium Sulfur Battery ENERGY STORAGE SYSTEM

Catalina Island, USA

NAS used for Island Application

Location

SCE solved engine part-load emissions problem on Catalina Island using NAS

Owner Southern California Edison
System Size 1MW
Commissioning Operation Date August, 2011

Background

  • Catalina Island is powered by diesel engines. NOx emission regulation can only be met when engines running at 80 to 100 percent capacity.
  • A solution was needed for those times when Catalina required energy from part-load (< 80%) engine capacity.

Solution

  • When demand is low, the diesel engines charge NAS.
  • NAS supplies energy when additional engines cannot operate at rated power.

Additional Benefits

  • Improved system voltage regulation, system stability, and system reliability.

Simulated System Operation on Catalina Island

  • System operation of a day on Catalina Island utilizing NAS was simulated.
  • Output power of Generators can be maintained at their allowable operation range (at 80 to 100 percent capacity) utilizing NAS.

NAS and the NAS logo are trademarks of NGK INSULATORS, LTD., registered in the U.S. and other countries.