D.C. Mun. Regs. tit. 15, § 4005
4005.1 The EDC shall use the Level 2 review procedure for an interconnection request when:
(a) The nameplate capacity rating is 2 MW or less;
(b) The interconnection equipment proposed for the small generator facility is certified; and
(c) The proposed interconnection is to a radial distribution circuit or to a spot network serving one customer.
4005.2 For Level 2 Adverse Impact Screens, the EDC shall evaluate the potential or adverse system impacts using the following screens which must be satisfied:
(a) For interconnection of a proposed small generator facility to a radial distribution circuit, the aggregated generation on the line section, including the proposed small generator facility, may not exceed fifteen (15) percent of the line section annual peak load.
(b) For interconnection of a proposed small generator facility to the load side of a spot network that protector supplies one specific service point, the proposed small generator facility shall utilize a certified inverter-based equipment package and may not exceed five (5) percent of the spot network's maximum load.
(c) For spot network interconnection, the generation shall not result in any reverse power conditions through the EDC network protectors. The proposed small generator facility cannot cause network protector cycling, cause inadvertent network protector opening, or have adverse impacts on any other customer under any conditions (including under fault conditions).
(d) The proposed small generator facility, in aggregation with other generation on the distribution circuit, may not contribute more than ten (10) percent to the distribution circuit's maximum fault current at the point on the primary line nearest the point of common coupling.
(e) The proposed small generator facility, in aggregate with other generation on the distribution circuit, may not cause any distribution protective devices and equipment (including substation breakers, fuse cutouts, and line reclosers), or other customer equipment on the electric distribution system to be exposed to fault currents exceeding 87.5 percent of the short circuit interrupting capability. The interconnection request may not receive approval for interconnection on a circuit that already exceeds 87.5 percent of the short circuit interrupting capability.
(f) The proposed small generator facility's point of common coupling may not be on a transmission line.
(g) When a customer-generator facility is to be connected to three- phase, three-wire primary EDC distribution lines, a three-phase or single-phase generator shall be connected phase-to-phase.
(h) When a customer-generator facility is to be connected to three-phase, four-wire primary EDC distribution lines, a three-phase or single-phase generator shall be connected line-to-neutral and shall be effectively grounded.
(i) When the proposed small generator facility is to be interconnected on single-phase shared secondary line, the aggregate generation capacity on the shared secondary line, including the proposed small generator facility, shall not exceed 20 kW.
(j) When a proposed small generator facility 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 two sides of the 240 volt service of more than twenty (20) percent of the nameplate rating of the service transformer.
(k) A small generator facility, in aggregate with other generation interconnected to the distribution side of a substation transformer feeding the circuit where the small generator facility proposes to interconnect, may 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.
(l) Except as permitted by an additional review in Level 2 Procedures, Section 4005.7, no construction of facilities by an EDC on its own system shall be required to accommodate the small generator facility.
4005.3 Interconnection to area networks is not permitted under the Level 2 review process.
4005.4 The Level 2 interconnection review shall be conducted in accordance with the following procedures:
(a) An EDC shall, within ten (10) business days after receipt of the interconnection request, inform the interconnection customer in writing or by electronic mail that the interconnection request is complete or incomplete. As part of this process, the EDC shall assign a queue position. The queue position of the interconnection request shall be used to determine the potential adverse system impact of the small generator facility based on the relevant screening criteria. If there are higher queued interconnection customers on the same radial line circuit or spot network, the EDC shall evaluate the interconnection request by performing any Level 2 screens requiring aggregate capacity calculations and determine if the small generator facility exceeds any of the aggregate capacity requirements. If an aggregate capacity requirement is exceeded, the EDC shall not be obligated to meet the timeline for reviewing the interconnection request until such time as the EDC has completed the review of all other interconnection requests that have a higher queue position and impact the aggregate capacity calculation that has been exceeded and shall so notify the interconnection customer.
(b) When an EDC determines that additional information is required to complete an evaluation, the EDC shall request the information. The time necessary to complete the evaluation may be extended by mutual agreement of the parties, but only to the extent of the time required for receipt of the additional information. During an extension of time to submit additional information, the EDC may not begin a new review process or alter the interconnection customer's queue position.
(c) Within twenty (20) business days after the EDC notifies the interconnection customer that it has received a completed interconnection request, the EDC shall:
(1) Evaluate the interconnection request using the Level 2 screening criteria;
(2) Review the interconnection customer's analysis, if provided by the interconnection customer, using the same criteria used by the customer;
(3) Conduct a spot network impact study at its own expense within the above
noted timeframe, if deemed necessary by the EDC; and
(4) Provide the interconnection customer with the EDC's evaluation, including a comparison of the results of its own analyses with those of interconnection customer, if applicable. When an EDC does not have a record of receipt of the interconnection request and the interconnection customer can demonstrate that the original interconnection request was delivered, the EDC shall expedite its review to complete the evaluation of the interconnection request within twenty (20) business days of the interconnection customer's re-submittal.
4005.5 When an EDC determines that the interconnection request passes the Level 2 screening criteria, the EDC shall provide the interconnection customer a small generator interconnection agreement within five (5) business days after the determination.4005.6 When an EDC determines that the interconnection request fails one (1) or more of the Level 2 screening criteria but determines that the small generator facility can be interconnected safely and reliably, the EDC shall provide the interconnection customer a small generator interconnection agreement within five (5) business days after the determination.4005.7 Additional review may be appropriate when a small generator facility has failed to meet one or more of the Level 2 screens. An EDC shall offer to perform additional review to determine whether minor modifications to the electric distribution system would enable the interconnection to be made consistent with safety, reliability and power quality criteria. The EDC shall provide the interconnection customer with a nonbinding, good faith estimate of the costs of additional review and minor modifications. The EDC shall undertake the additional review or modifications only after the interconnection customer consents to pay for the review and modifications.4005.8 An interconnection customer shall have thirty (30) business days to sign and return the agreement. When an interconnection customer does not sign the agreement within thirty (30) business days, the interconnection request shall be deemed withdrawn unless the interconnection customer requests to have the deadline extended in writing prior to the expiration of the thirty (30) business day period. The request for extension may not be unreasonably denied by the EDC.4005.9 When construction is required under the provisions of Sections 4005.5 and 4005.6, the interconnection of the small generator facility shall proceed according to all milestones agreed to by the parties in the small generator interconnection agreement. The small generator interconnection agreement shall not become final until:- (a) The milestones agreed to in the small generator interconnection agreement are satisfied;
- (b) The small generator facility is approved by electric code officials with jurisdiction over the interconnection;
- (c) The interconnection customer provides a certificate of completion to the EDC. Completion of local inspections may be designated on inspection forms used by local inspecting authorities; and
- (d) There is a successful completion of the witness test per the terms and conditions found in the Standard Agreement for Interconnection of Small Generator Facilities, unless waived.4005.10 If the small generator facility is not approved under a Level 2 review, the EDC shall provide the interconnection customer a letter explaining its reasons for denying the interconnection request. The interconnection customer may submit a new interconnection request for consideration under
a Level 3 or Level 4 interconnection review. The queue position assigned to the Level 2 interconnection request shall be retained provided the request is made within fifteen (15) business days of notification that the current interconnection request is denied.
SOURCE: As amended by Final Rulemaking published at 56 DCR 1415, 1418 (February 13, 2009).