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Quiz question for the Power System Engineers

Doug Houseman's picture
Visionary and innovator in the utility industry and grid modernization Burns & McDonnell

I have a broad background in utilities and energy. I worked for Capgemini in the Energy Practice for more than 15 years. During that time I rose to the position of CTO of the 12,000 person...

  • Member since 2017
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  • Jun 10, 2021

You have a 5KV circuit with 1 industrial customer (1 MVA baseload), 3 Commercial 24-hour locations with an average of 100KVA baseload each, 300 residential customers with 2 cars each. 636 ACSR conductor.

All of the residential customers have 3-ton air-source heat pumps -it is the only source of heat available. 

The vehicles are split equally between Ford and GM. The GM vehicles are equally split between 50KWH and 200KWH Ultium platforms with the factory charger. The Ford Vehicles are a 50/50 mix of extended range (150KWH) F-150 Lightnings and Mustang Mach E (both with factory standard chargers). 

The diversified load for the 300 residential customers is 4.1KVA per household (without the vehicles or the heat pumps). 

The temperature outside is -40 degrees. 

People must be able to go to work in the morning. Buildings must be kept warm. 

You have no demand response programs or stationary storage. 

1.     Without violating firm limits – how many cars can you charge overnight?
2.     What is the best investment to improve these numbers? ($/KW)
3.     What is the best long term improvement you could make for these customers (30+ year life)?

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