The best I can make sense of this article, there may have been, overall, enough generating capacity on the grid, but not enough transmission capacity in particu

The best I can make sense of this article, there may have been, overall, enough generating capacity on the grid, but not enough transmission capacity in particular locations. The closest anything in this article is the bizarre state statement that "no one says it was congestion". But spiking LMP's pretty much exactly indicate either congestion or insufficient generation in particular areas. In fact, in the case that, overall, there is sufficient generation, these conditions are the same. What it might mean is that there is some network condition, e.g. some generation or transmission out on scheduled maintenance, that puts the grid in a less-than secure state, such that higher than expected demand causes transmission in unexpected areas of the network.