Slideshow ( 2 images ) (Reuters) - One of the best ways to boost power grid reliability ahead of extreme weather events like the Texas freeze is a capacity market that pays generators to keep plants available, executives at two grid operators and an energy company said Thursday. Speaking at CERAWeek by IHS Markit, Chief Executive Gordon Van Welie of New England’s power grid operator ISO New England said “It really comes down to how much insurance you want to buy.” “We had the big wake up call back in January 2004 where (like Texas) we had about a third of our (natural gas) fleet not able to get enough fuel,” Van Welie said, noting now “We have capacity markets ... with incentives and penalties if plants don’t perform.”