Virginia Administrative Code › Title 20 - PUBLIC UTILITIES AND TELECOMMUNICATIONS › Agency 5 - STATE CORPORATION COMMISSION › Chapter 314 - REGULATIONS GOVERNING INTERCONNECTION OF SMALL ELECTRICAL GENERATORS › Section 20VAC5-314-60 - Level 2 interconnection process

Current through Register Vol. 40, No. 24, July 15, 2024
A. The Level 2 interconnection process is
				available to an IC proposing to interconnect a certified SGF with the utility
				system if the SGF is no larger than 2 MW and does not qualify for the Level 1
				process, and meets the codes, standards, and certification requirements of
				Schedules 2 and 3 of
				20VAC5-314-170.
B. Within 15 business days after the utility
				notifies the IC it has received a complete Interconnection Request Form, the
				utility shall perform an initial review using the screens set forth in
				subsection C or D of this section, as applicable and shall notify the IC of the
				results, including copies of the analysis and data underlying the utility's
				determinations under the screens.
C. Screens for interconnections to radial
				circuits.
1. For interconnection of an SGF to
				a radial distribution circuit, the aggregated generation, including the
				proposed SGF, on the circuit shall not exceed 15% of the line section's annual
				peak load as most recently measured at the substation or calculated for the
				line section. A line section is that portion of a distribution circuit
				connected to a customer that is bounded by automatic sectionalizing devices or
				the end of the circuit.
2. The SGF,
				in aggregation with other generation on the distribution circuit, shall not
				contribute more than 10% to the circuit's maximum fault current at the point on
				the distribution feeder's (primary) voltage level that is nearest the point of
				interconnection.
3. The SGF, in
				aggregate with other generation on the distribution circuit, shall not cause
				any distribution protective devices and equipment (including substation
				breakers, fused cutouts, and line reclosers) or IC equipment on the system to
				exceed 87.5% of the short circuit interrupting capability nor shall the
				interconnection be permitted on a circuit where 87.5% of the short circuit
				interrupting capability is already exceeded.
4. For interconnections to the distribution
				primary voltage, use the table in this subdivision to determine the acceptable
				type of interconnection to a primary distribution circuit. This screen includes
				a review of the type of electrical service provided to the IC, including line
				configuration and the transformer connection, to limit the potential for
				creating over-voltages on the 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/Criteria
Three-phase, three wire
Three-phase, orsingle-phase,
							 phase-to-phase
Pass screen
Three-phase, four wire
Effectively-groundedthree-phase, or single-phase,
							 line-to-neutral
Pass screen
5.
				If the SGF is to be interconnected to a single-phase shared secondary, the
				aggregate generation capacity on the shared secondary, including the proposed
				SGF, shall not exceed 20 kW.
6. If
				the SGF is single-phase and is to be interconnected on a center tap neutral of
				a 240 volt service, its addition shall not create an imbalance between the two
				sides of the 240 volt service of more than 20% of the nameplate rating of the
				service transformer.
7. The SGF, in
				aggregate with generation interconnected to the transmission side of the
				substation transformer that feeds the distribution circuit where the SGF
				proposes to interconnect, shall not exceed 10 MW in an area where there are
				known, or posted, transient stability limitations to generating units located
				in the general electrical vicinity (e.g., within three or four transmission
				busses from the point of interconnection).
8. No construction of facilities by the
				utility on its own system shall be required to accommodate the SGF.