Average time on market: 26 days Certified Pre-Owned: No Transmission: 4-Speed Automatic Overdrive Description: Used 2011 Nissan Versa 1.8 S for sale - $3,999, 108,531 miles with Steel Wheels.
Ancillary Activities are Geological and Geophysical (G&G) exploration and development activities conducted to detect oil, gas, or sulphur in commercial quantities.
Ancillary services. There are four types of ancillary services products: regulation up, regulation down, spinning reserve and non-spinning reserve. Regulation energy is used to control system frequency that can vary as generators access the system and must be maintained very narrowly around 60 hertz.pinning reserve is the portion of unloaded capacity from units already connected or synchronized to the grid and that can deliver their energy in 10 minutes. Non-spinning reserve is capacity that can be synchronized and ramping to a specified load within 10 minutes.