テキサスの停電は風力発電への依存が原因。これから日本もこういう過少投資による電源不安定化のリスクにさらされる。これが電力自由化のコスト。
— 池田信夫 (@ikedanob) February 20, 2021
【社説】米テキサス州の停電は政治の産物 https://t.co/oP0ZvKTHFA
The problem is Texas’s overreliance on wind power that has left the grid more vulnerable to bad weather. Half of wind turbines froze last week, causing wind’s share of electricity to plunge to 8% from 42%. Power prices in the wholesale market spiked, and grid regulators on Friday warned of rolling blackouts. Natural gas and coal generators ramped up to cover the supply gap but couldn’t meet the surging demand for electricity—which half of households rely on for heating—even as many families powered up their gas furnaces. Then some gas wells and pipelines froze.
In short, there wasn’t sufficient baseload power from coal and nuclear to support the grid. Baseload power is needed to stabilize grid frequency amid changes in demand and supply. When there’s not enough baseload power, the grid gets unbalanced and power sources can fail. The more the grid relies on intermittent renewables like wind and solar, the more baseload power is needed to back them up.
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