It's very simple. We eliminated some base load coal through regulation and replaced it with variable wind, and used flexible gas to make up the difference in wind variation as needed. We didn't plan on three things:
1. Super cold weather can condense and freeze water vapor in raw gas
2. Super cold weather increases gas demand for direct thermal heating when it is needed most for power also.
3. If you increase demand so you are at 100% gas output and wind is part of the output and wind falls off, there's no way to make up the difference and you HAVE to start blackouts or you cause plants to shut down due to overload to prevent damage.
1. Super cold weather can condense and freeze water vapor in raw gas
2. Super cold weather increases gas demand for direct thermal heating when it is needed most for power also.
3. If you increase demand so you are at 100% gas output and wind is part of the output and wind falls off, there's no way to make up the difference and you HAVE to start blackouts or you cause plants to shut down due to overload to prevent damage.
