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3 Mar
This afternoon, @MISO_energy is hosting its final workshop on the Renewable Integration Impact Assessment report. Didn’t read the 217pg report? I’ve created this thread to prep you for the 1pm CT call. (here's the report:…, and the report as a word cloud:)
RIIA began in 2017 as a study to find “inflection points” for renewable penetration in MISO. These are the key questions RIIA set out to tackle: When does renewable integration get hard, and how do we fix it?
If there’s one key takeaway from RIIA, it’s this pull quote from the report: “Through coordinated action with MISO stakeholders, RIIA concludes that renewable penetration beyond 50% can be achieved.” That’s great news, and a big deal.
Read 11 tweets
22 Feb
This past week has focused a lot on Texas' blackout and response to the polar vortex, Uri. There were also considerable problems in MISO South that are probably going to get ignored (except from MISO South customers, and regulators). So let's talk about it. Thread 1/8-
During Polar Vortex '21, aka, Uri...
MISO was importing (-) a lot of power from PJM (MIDA) almost 10GW, and also exporting (+) a lot of power to SPP (CENT) to keep the lights on, almost 5GW. 2/8… Image
SPP (CENT) was also sending its max 831 MW of power into Texas nearly all last week. 3/8 Image
Read 10 tweets
17 Feb
What are kilowatts, megawatt hours, and giga...whats?

The US power system uses metric prefixes. The most basic unit of energy is the watt. 1,000 watts = 1 kilowatt (KW). 1,000 kW = 1 megawatt (MW). 1,000 MW = 1 gigawatt (GW).
A kilowatt or megawatt indicates capacity or instant power demand/generation. A kilowatt hour or megawatt hour indicates power usage over time.

A microwave uses 1,000 watts of power.
If it runs for 1 hour, it consumes 1kWh of electricity.

A typical TX house uses 30kWh daily.
Power plants are often rated in megawatts. A typical wind turbine is about 2 MW's, meaning it can generate at max output 2MWh in a single hour, or 48MWh's in a day. Wind farms put together dozens of turbines, up to hundreds of MW's of capacity.
Read 7 tweets
17 Feb
While debate rages over blackout causes (fossil fuels? market design?) few have pointed out transmission expansion planning failures. @aripescoe published this great paper (in January!) explaining why major utilities are hampering transmission planning.…
One aspect of RTO/ISO's is "transmission expansion planning". MISO's process is the MISO Transmission Expansion Plan MTEP. There are many *types* of transmission projects from small to big.
Small projects are 100% paid for by the local utility. Baseline Reliability Projects/"Other"/Age & Condition upgrades. Entergy has argued those projects don't need MISO review/approval. So, they're accepted as-is bottom-up projects.
Read 18 tweets