Michigan Administrative Code › Department - Licensing and Regulatory Affairs › Public Service Commission › Interconnection and Distributed Generation Standards › Part 2 - INTERCONNECTION STANDARDS › Section R. 460.946 - Fast track; initial review

Current through Vol. 24-12, July 15, 2024
Rule 46.
(1) An
				  electric utility shall list in its interconnection procedures the initial
				  review screens specified in subrule (5) of this rule. An electric utility may
				  add additional details to each of these screens in the interconnection
				  procedures.
(2) An electric utility
				  may include additional initial review screens in its interconnection
				  procedures. In its application requesting approval of interconnection
				  procedures, an electric utility shall provide a detailed technical rationale
				  for including each additional screen. If an additional screen conflicts with or
				  undermines any of the initial review screens specified in subrule (5) of this
				  rule, the rationale must include an explanation of how it does so.
(3) The electric utility may waive
				  application of 1, some, or all of the initial review screens.
(4) Within 10 business days after an electric
				  utility receives a complete and conforming level 1 or level 2 application and
				  associated payment, or within 20 business days after an electric utility
				  receives a complete and conforming level 3, level 4, or level 5 application and
				  associated payment, the electric utility shall perform an initial review and
				  notify the applicant of the results. The initial review must consist of
				  applying the initial review screens selected by the electric utility pursuant
				  to subrule (3) of this rule to the proposed DER. The electric utility shall not
				  require a supplemental review or a system impact study if the DER passes the
				  applied initial review screens.
(5)
				  The initial review screens are all of the following:
(a) The entire proposed DER, including all
				  aggregated site generation and point or points of interconnection, must be
				  located within the electric utility's service territory.
(b) For interconnection of a proposed DER to
				  a radial distribution circuit, the aggregated generation, including the
				  proposed DER, on the circuit may not exceed 15% of the line section annual peak
				  load as most recently measured or calculated if measured data is not available.
				  A line section is that portion of an electric utility's distribution system
				  connected to a customer bounded by automatic sectionalizing devices or the end
				  of the distribution line. The electric utility shall consider 100% of
				  applicable loading, if available, instead of 15% of line section peak load for
				  level 1 and level 2 DER. In the event daytime loading data is not available,
				  the data must be collected by a date specified in interconnection procedures
				  approved by the commission, and is not considered as part of the aggregate
				  generation, for purposes of this screen, DER capacity known to be already
				  reflected in the minimum load data. This screen does not apply to level 1 and
				  level 2 non-export DER applications.
(c) For interconnection of a proposed DER to
				  the load side of network protectors, the proposed DER must utilize an
				  inverter-based equipment package and, together with the aggregated other
				  inverter-based DERs, may not exceed the smaller of 5% of a network's maximum
				  load or 50 kWac.
(d) The proposed
				  DER, in aggregation with other DERs on the distribution circuit, may not
				  contribute more than 10% to the distribution circuit's maximum fault current at
				  the point on the primary voltage nearest the proposed point of common coupling.
				  This screen does not apply to level 1 applications.
(e) The proposed DER, in aggregate with other
				  DERs on the distribution circuit, may not cause any distribution protective
				  devices and equipment or interconnection customer equipment on the system to
				  exceed 87.5% of the short circuit interrupting capability. An interconnection
				  may not be proposed for a circuit that already exceeds 87.5% of the short
				  circuit interrupting capability. Distribution protective devices and equipment
				  include, but are not limited to, substation breakers, fuse cutouts, and line
				  reclosers. This screen does not apply to level 1 applications.
(f) The initial review screen determines the
				  type of interconnection to a primary distribution line for the proposed DER,
				  according to the requirements specified in the table in this subdivision. This
				  screen includes a review of the type of electrical service provided to the
				  applicant, including line configuration and the transformer connection to limit
				  the potential for creating over-voltages on the electric utility's distribution
				  system due to a loss of ground during the operating time of any anti-islanding
				  function.
Primary Distribution Line Type
Type of Interconnection to Primary Distribution
								  Line
Result
3-phase, 3 wire
3-phase or single phase, phase-to-phase
Pass screen
3-phase, 4 wire
Effectively-grounded 3-phase or single-phase,
								  line-to-neutral
Pass screen
(g)
				  If the proposed DER is to be interconnected on single-phase shared secondary,
				  the aggregate generation capacity on the shared secondary, including the
				  proposed DER export capacity, may not exceed 20 kWac or 65% of the transformer
				  nameplate rating.
(h) If the
				  proposed DER is single-phase and is to be interconnected on a center tap
				  neutral of a 240 volt service, its addition may not create an imbalance between
				  the 2 sides of the 240 volt service of more than 20% of the nameplate rating of
				  the service transformer.
(i) If the
				  proposed DER is single-phase and is to be interconnected to a 3-phase service,
				  its nameplate rating may not exceed 10% of the service transformer nameplate
				  rating.
(j) If the proposed DER's
				  point of common coupling is behind a line voltage regulator, the DER's
				  nameplate rating must be less than 250 kWac. This screen does not include
				  substation voltage regulators.