wind

14Aug

The Texas Reliability Two Step

The Texas grid has been pushed to its limits this week. Demand for power has exceeded supply, prices have soared and energy experts and consumers alike have waited with bated breath for rolling brownouts or blackouts.   On Monday, electricity demand hit a new record and electricity prices spiked to $6,500 per megawatt hour. On […]
07Aug

When Down is Up

The reduction in the price of electricity from solar and wind power over the last decade has made for a fantastic story. But it’s hiding a more complex and troubling truth. While the price of generating power from renewables has fallen, the cost, or burden, of integrating these intermittent sources of power onto the grid […]
26Jun

When Markets Undermine Reliability

Air conditioners are running at full throttle as summer descends in all its sticky, suffocating glory. As those ACs kick on, electricity demand is creeping up, potentially hitting record levels in some states. In Texas, as temperatures climb towards triple digits, customers are wondering if the AC – and a reliable flow of power – […]
05Jun

Driving Up the Cost of Power for Consumers

Making an apples to apples comparison of new weather-dependent renewables against existing coal or nuclear power plants cannot be done – at least not with our existing tools. Not only are you trying to compare one source of variable power to dispatchable, baseload generation that’s available 24-7, but you’re also attempting to compare a facility […]
01May

Subsidizing Grid Unreliability

As the share of coal power on the Texas grid continues to decline and as greater reliance is placed on renewable sources of generation, Texans are crossing their fingers that they don’t face rolling outages this summer. There’s ample reason for concern. ERCOT, the state’s grid operator, is working with a razor-thin reserve margin of generating […]
17Apr

Batteries: Great Promise, Even Greater Hype

Lithium-ion batteries are everywhere. From our smartphones, computers and tablets to electric vehicles, we are in the midst of a battery revolution. But for all the promise of batteries, there are limitations. There are physics problems that dictate how batteries can be used, or should be used, that need to inform our energy policy. Unfortunately, […]
20Mar

A “Very Scary” Situation in Texas

Texas got a taste of cooler than expected weather this week and it sent shockwaves across the state’s electricity market. The Lone Star State learned a valuable lesson about putting too much faith in intermittent renewables. Temperatures dipped Monday morning, increasing heating demand, and that cooler weather was accompanied by calmer than expected winds. Calm […]
01Mar

A Warning Not to be Ignored

How valuable is a balanced, diverse mix of energy sources? Just ask the Midcontinent Independent System Operator (MISO), the grid operator that manages the electricity grid for much of the U.S. Midwest and parts of Canada. When the polar vortex hammered the Midwest at the end of January, the grid weathered the storm, but it […]