IESO moves its large-load connection rules toward Ontario's Market Rules; webinar 19 November
Version 3.0 of the technical requirements landed 3 September, the feedback response posted 2 November, and the proposed Market Rule amendments go to a webinar on 19 November. Rule change targeted for Q2 2027.
The IESO is preparing to write its large-computational-load requirements into Ontario's Market Rules. It issued Version 3.0 of the technical document on 3 September, posted its reply to the summer feedback round on 2 November, and will present the proposed Market Rule and Market Manual amendments in a webinar on 19 November.
What the requirements cover
The requirements cover how a site connects, reactive-power capability, damping, oscillation, load fluctuation and ramp rates, and ride-through. They apply to every transmission-connected computational load and to distribution-connected loads above 10 MW.
Since May the IESO has added a staged path in which early projects can receive a comfort letter before detailed design, and it has set out which grid disturbances may move a facility onto UPS supply.
The roadmap
Its roadmap targets a Technical Panel recommendation in Q1 2027 and the rule change in Q2 2027.
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