topic NEED HELP TO DESIGN CONNECTION AT THE GRID SUBSTATION -TIERS AT THE ELECTRICAL DOMAIN in Electric Questions

NEED HELP TO DESIGN CONNECTION AT THE GRID SUBSTATION -TIERS AT THE ELECTRICAL DOMAIN

RomuldKiobya — Wed, 05 Jul 2023 07:34:30 GMT

Look attached document for more understanding. I have an incoming HV line Mufindi grid substation to the Mbeya Grid substation (Transmission tier). HV signal/connection travel to HV transformer (220KV/33KV) at the terminal of XFR-High. I created a Sub-transmission tier at the XFR-Low that ends with an MV circuit breaker at the Bus terminal. I made a Distribution tier at the MV Circuit breaker at the CB Line terminal.

My doubt about the Sub-transmission tier. And at what condition sub-transmission tier is used?

Re: NEED HELP TO DESIGN CONNECTION AT THE GRID SUBSTATION -TIERS AT THE ELECTRICAL DOMAIN

JohnAlsup — Wed, 05 Jul 2023 10:14:03 GMT

In this case you would not need the subtransmission tier. Subtranmission is just like transmission, just a lower voltage, so subtransmission runs between stations, just like transmission. I think you are trying to build a tier inside the substation for the equipment between the transformer and the breakers, is that correct?

Re: NEED HELP TO DESIGN CONNECTION AT THE GRID SUBSTATION -TIERS AT THE ELECTRICAL DOMAIN

RomuldKiobya — Wed, 05 Jul 2023 12:24:47 GMT

Yes, I need to create subnetwork controller and subnetwork, starting Low terminal of HV transformer to CB bus of MV Circuit Breaker. So which tier I suppose select if not sub-transmission (contain high voltage devices and MV devices) at sub network definition tool?

Re: NEED HELP TO DESIGN CONNECTION AT THE GRID SUBSTATION -TIERS AT THE ELECTRICAL DOMAIN

JohnAlsup — Wed, 05 Jul 2023 12:37:34 GMT

Then you would just make the HV to MV transformer a subnetwork controller in the Distribution tier, call it Sub1 or some other name, and keep you the other subnetwork controllers at the circuit breakers in the distribution tier.