South Dakota Administrative Rules › Title 20 - PUBLIC SAFETY › Article 20:10 - PUBLIC UTILITIES COMMISSION › Chapter 20:10:36 - Small generator facility interconnection › Section 20:10:36:37 - Tier 2 interconnection evaluation and screening criteria

Current through Register Vol. 51, page 10, July 15, 2024
A tier 2 interconnection shall use the following evaluation
				  and screening criteria:
(1) For
				interconnection to a radial distribution circuit, aggregated generation on the
				circuit may not exceed 15 percent of the line section annual peak load as most
				recently measured at the substation or calculated for the line section.
				Aggregated generation includes the proposed small generator facility, FERC
				wholesale generators, and FERC wholesale generators with a higher queue
				position;
(2) For interconnection
				to the load side of spot network protectors, the aggregated other generation
				may not exceed the lesser of five percent of a spot network's maximum load or
				50 kilowatts. Aggregated other generation includes the proposed small generator
				facility, FERC wholesale generators, and FERC wholesale generators with a
				higher queue position;
(3) General
				aggregate generation considerations are:
(a)
				In aggregate with other generation on the distribution circuit, the small
				generator facility may not contribute more than ten percent to the distribution
				circuit's maximum fault current at the point on the primary voltage
				distribution line nearest the point of interconnection;
(b) In aggregate with other generation,
				existing FERC wholesale generators, and FERC wholesale generators with a higher
				queue position on the distribution circuit, the small generator facility may
				not cause any distribution protective devices and equipment to be exposed to
				fault currents exceeding 90 percent of the short circuit interrupting
				capability. Distribution protective devices and equipment include: substation
				breakers, fuse cutouts, line reclosers, and other public utility equipment on
				the EDS. The small generator facility's point of interconnection may not be
				located on a circuit that already exceeds 90 percent of the short circuit
				interrupting capability;
(c) In
				aggregate with other generation, existing FERC wholesale generators, and FERC
				wholesale generators with a higher queue position interconnected to the
				distribution side of a substation transformer feeding the circuit where the
				small generator facility proposes to interconnect, the small generator facility
				may not exceed 10 megawatts in an area where there are known, or posted,
				transient stability limitations to generating units located in the general
				electrical vicinity;
(d) In
				aggregate with existing FERC wholesale generators, FERC wholesale generators
				with a higher queue position, and existing transmission loads, the small
				generator facility, may not cause a transmission system circuit to exceed its
				design capacity on the transmission system circuit directly connected to the
				distribution circuit where the interconnection is proposed; and
(e) If the small generator facility is to be
				interconnected on single-phase shared service line on the EDS, the aggregate
				generation capacity on the shared secondary line, including the proposed small
				generator facility, may not exceed 20 kilowatts;