Illinois Administrative Code › Title 83 - PUBLIC UTILITIES › Part 466 - ELECTRIC INTERCONNECTION OF DISTRIBUTED GENERATION FACILITIES › Section 466.20 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
Terms defined in Section 16-102 of the Public Utilities Act [220
				ILCS 5 ] shall have the same meaning for purposes of this Part as they have under
				Section 16-102 of the Act, unless further defined in this Part. The following words
				and terms, when used in this Part, have the following meanings unless the context
				indicates otherwise:
"Act" means the Public Utilities Act [220 ILCS 5 ].
"Adverse system impact" means a negative effect that compromises the
				safety or reliability of the electric distribution system or materially affects the
				quality of electric service provided by the electric distribution company (EDC) to
				other customers.
"Affected system" means an electric system not owned or operated by
				the electric distribution company reviewing the interconnection request that could
				suffer an adverse system impact from the proposed interconnection.
"Applicant" means a person (or entity) who has submitted an
				interconnection request to interconnect a distributed energy resources facility to
				an EDC's electric distribution system.
"Area network" means a type of electric distribution system served
				by multiple transformers interconnected in an electrical network circuit, generally
				used in large, densely populated metropolitan areas.
"Business day" means Monday through Friday, excluding State and
				federal holidays.
"Calendar day" means any day, including Saturdays, Sundays and State
				and federal holidays.
"Certificate of completion" means a certificate, in a form approved
				by the Commission, that contains information about the interconnection equipment to
				be used, its installation and local inspections (see Appendix B).
"Commissioning test" means tests applied to a distributed energy
				resources facility by the applicant after construction is completed to verify that
				the facility does not create adverse system impacts and performs to the submitted
				specifications. At a minimum, the scope of the commissioning tests performed shall
				include the commissioning test specified in Institute of Electrical and Electronics
				Engineers, Inc. (IEEE) Standard 1547 Section 5.4 "Commissioning tests".
"Contingent upgrades" means proposed interconnection facilities or
				distribution system upgrades, identified during interconnection studies for an
				applicant's interconnection request, that are the responsibility of an
				interconnection request earlier in the queue than the subject application for
				interconnection. The identified contingent upgrades are required in order for the
				applicant's proposed interconnection request to receive permission to operate and,
				if delayed or not built by the earlier-queued interconnection request, could cause a
				need for restudies of the interconnection request and may become the responsibility
				of the applicant's interconnection request.
"Distributed energy resources facility" or "DER" facility means the
				equipment used by an interconnection customer to generate or store electricity that
				operates in parallel with the electric distribution system. A DER facility may
				include, but is not limited to, an electric generator or energy storage system, a
				prime mover, and the interconnection equipment required to safely interconnect with
				the electric distribution system or local electric power system.
"Distribution upgrade" means a required addition or modification to
				the electric distribution system to accommodate the interconnection of the DER
				facility. Distribution upgrades do not include interconnection facilities.
"Draw-out type circuit breaker" means a switching device capable of
				making, carrying and breaking currents under normal and abnormal circuit conditions
				such as those of a short circuit. A draw-out circuit breaker can be physically
				removed from its enclosure creating a visible break in the circuit. The draw-out
				circuit breaker shall be capable of being locked in the open, drawn-out
				position.
"Earlier in the queue" means that an interconnection request
				relative to another interconnection request retains the rights to use any available
				distribution system capacity first and may be interconnected first.
"Electric distribution company" (EDC) means any electric utility
				subject to the jurisdiction of the Commission.
"Electric distribution system" means the facilities and equipment
				owned and operated by the EDC and used to transmit electricity to ultimate usage
				points such as homes and industries from interchanges with higher voltage
				transmission networks that transport bulk power over longer distances. The voltage
				levels at which electric distribution systems operate differ among areas, but
				generally operate at less than 100 kilovolts (kV) of electricity. "Electric
				distribution system" excludes facilities under the operational control of the
				regional transmission organization (RTO) that would otherwise be classified as
				distribution.
"Energy storage system" (ESS) means a mechanical, electrical, or
				electrochemical means to store and release electrical energy, and its associated
				electrical inversion device and control functions.
"Export capacity" means the nameplate capacity in kilovolt amperes
				(kVA) of a DER facility except where that capacity is limited by an acceptable means
				as identified in Section 466.75.
"Fault current" is the electrical current that flows through a
				circuit during an electrical fault condition. A fault condition occurs when one or
				more electrical conductors contact ground or each other. Types of faults include
				phase to ground, double-phase to ground, three-phase to ground, phase-to-phase, and
				three-phase. Often, a fault current is several times larger in magnitude than the
				current that normally flows through a circuit.
"Host load" means the electrical power registered by the EDC during
				the prior 12-month period at the customer meter to which the proposed DER facility
				is to be interconnected.
"IEEE" is the Institute of Electrical and Electronics Engineers,
				Inc., 3 Park Avenue, New York NY 10016-5997 (
http://www.ieee.org
).
"IEEE C37.90 " is the IEEE Standard C 37.90(2005), "IEEE Standard
				for Relays and Relay Systems Associated with Electric Power Apparatus". This
				incorporation does not include any later amendments or editions.
"IEEE C37.90.1" is the IEEE Standard C37.90.1 (2012), "IEEE Standard
				for Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated
				with Electric Power Apparatus". This incorporation does not include any later
				amendments or editions.
"IEEE C37.90.2" is the IEEE Standard C37.90.2 (2004), "IEEE Standard
				for Withstand Capability of Relay Systems to Radiated Electromagnetic Interference
				from Transceivers". This incorporation does not include any later amendments or
				editions.
"IEEE C62.92.6" is the IEEE Standard C62.92.6 (2017), "IEEE Guide
				for Application of Neutral Grounding in Electrical Utility Systems, Part VI--Systems
				Supplied by Current-Regulated Sources". This incorporation does not include any
				later amendments or editions.
"IEEE Standard 519-2014" is the IEEE Standard 519-2014 "IEEE
				Recommended Practice and Requirements for Harmonic Control in Electric Power
				Systems". This incorporation does not include any later amendments or
				editions.
"IEEE Standard 1547" is the IEEE Standard 1547 (2003) "Standard for
				Interconnecting Distributed Resources with Electric Power Systems". This
				incorporation does not include any later amendments or editions.
"IEEE Standard 1547.1 " is the IEEE Standard 1547.1(2005)
				"Conformance Test Procedures for Equipment Interconnecting Distributed Resources
				with Electric Power Systems." This incorporation does not include any later
				amendments or editions.
"Inadvertent export" means the unpermitted, unscheduled, and
				uncompensated export of real power from a DER facility and exported across the point
				of interconnection to the EDC's distribution system.
"Interconnection customer" means a person or entity that
				interconnects, or seeks to interconnect, a DER facility to an electric distribution
				system.
"Interconnection equipment" means a group of components or an
				integrated system owned and operated by the interconnection customer that connects
				an electric generator with a local electric power system, as that term is defined in
				Section 3.1.6.2 of IEEE Standard 1547, or with the electric distribution system.
				Interconnection equipment is all interface equipment including switchgear,
				protective devices, inverters or other interface devices. Interconnection equipment
				may be installed as part of an integrated equipment package that includes a
				generator or other electric source.
"Interconnection facilities" means facilities and equipment required
				by the EDC to accommodate the interconnection of a DER facility. After installation,
				interconnection facilities become part of the electric distribution system.
				Collectively, interconnection facilities include all facilities and equipment
				between the DER facility's interconnection equipment and the point of
				interconnection, including any modifications, additions, or upgrades necessary to
				physically and electrically interconnect the DER facility to the electric
				distribution system. Interconnection facilities are sole use facilities and do not
				include distribution upgrades.
"Interconnection request" means an applicant's request, in a form
				approved by the Commission, for interconnection of a new DER facility or to change
				the capacity or other operating characteristics of an existing DER facility already
				interconnected with the electric distribution system.
"Interconnection study" is any study described in Section
				466.120.
"Lab-certified" means a designation that the interconnection
				equipment meets the requirements set forth in Section
				466.70.
"Like-kind modification" means a modification to interconnection
				equipment such that the installed interconnection equipment has analogous
				certification, size, ratings, impedances, efficiencies, and operating
				capabilities.
"Limited export" means the exporting capability of a DER facility
				whose generating capacity is limited below the nameplate capacity by the use of a
				configuration or operating mode as described in Section 466.75.
"Line section" is that portion of an electric distribution system
				connected to an interconnection customer's site, bounded by automatic sectionalizing
				devices or the end of the distribution line.
"Local electric power system" means facilities that deliver electric
				power to a load that is contained entirely within a single premises or group of
				premises. Local electric power system has the same meaning as that term has as
				defined in Section 3.1.6.2 of IEEE Standard 1547.
"Material modification" has the meaning ascribed in Section
				466.125.
"Minor system modifications" means modifications to an EDC's
				Electric Distribution System located between the service tap on the distribution
				circuit and the meter serving the Interconnection Customer or other minor system
				changes that the EDC estimates will entail less than 10 hours of work and $5,000 in
				materials.
"Nameplate capacity" is the maximum rated output in kVA of a
				generator, prime mover, energy storage system, or other electric power production
				equipment under specific conditions designated by the manufacturer and usually
				indicated on a nameplate physically attached to the power production
				equipment.
"Nationally recognized testing laboratory" or "NRTL" means a
				qualified private organization that meets the requirements of the Occupational
				Safety and Health Administration's (OSHA) regulations. See
				29
				CFR 1910.7 (February 18, 2020). This incorporation
				does not include any later amendments or editions. NRTLs perform independent safety
				testing and product certification. Each NRTL shall meet the requirements as set
				forth by OSHA in its NRTL program.
"Non-export" or "non-exporting" means that the DER facility is sized
				and designed, such that no electrical energy other than inadvertent export allowed
				by Section 466.75 is transferred from the DER facility to the electric distribution
				system.
"Operating profile" means the manner in which the DER facility is
				designed to be operated, based on the generating prime mover and operating
				characteristics, including any energy storage system.
"Parallel operation" or "parallel" means a DER facility that is
				connected electrically to the electric distribution system for longer than 100
				milliseconds.
"Point of interconnection" or "POI" means the point where the DER
				facility is electrically connected to the electric distribution system. Point of
				interconnection has the same meaning as the term "point of common coupling" defined
				in Section 3.1.13 of IEEE Standard 1547.
"Power control system" means systems or devices that electronically
				limit or control steady state currents to a programmable limit.
"Power rating configuration setting" means the as-configured value
				of the active or apparent power ratings that is used as the rating within the DER
				facility.
"Primary line" means an electric distribution system line operating
				at greater than 600 volts.
"Protective function" means the specific type of protection, based
				on the ANSI Protection Device Numbers and functional descriptions, that a
				utility-grade protective relay provides against conditions that, if left
				uncorrected, could result in, but not limited to, the following: harm to personnel,
				damage to equipment, loss of safety or reliability, or operation outside
				pre-established parameters required by the interconnection agreement.
"Queue position" means, for each distribution circuit or line
				section, the order of a completed interconnection request relative to all other
				pending completed interconnection requests on that distribution circuit or line
				section. It is established by the date that the EDC receives the completed
				interconnection request.
"Radial distribution circuit" means a circuit configuration in which
				independent feeders branch out radially from a common source of supply.
"Regional Transmission Organization" or "RTO" means the independent
				systems operator that administers and oversees the wholesale electricity markets in
				which the State participates. In Illinois, the two RTOs are the Midcontinent
				Independent System Operator, Inc. and PJM Interconnection, LLC.
"Scoping meeting" means a meeting between representatives of the
				applicant and EDC conducted to discuss interconnection issues and exchange relevant
				information.
"Secondary line" means an electric distribution system line, or
				service line, operating at 600 volts or less.
"Shared transformer" means a transformer that supplies secondary
				voltage to more than one customer.
"Spot network" means a type of electric distribution system that
				uses two or more inter-tied transformers to supply an electrical network circuit. A
				spot network is generally used to supply power to a single customer or a small group
				of customers. Spot network has the same meaning as the term "spot network" defined
				in Section
				4.1.4 of IEEE Standard
				1547.
"Standard DER interconnection agreement" means a standard
				interconnection agreement applicable to interconnection requests for DER facilities.
				(see Appendices A and D).
"UL Standard 1741" means the standard titled "Inverters, Converters,
				Controllers and Interconnection System Equipment for Use With Distributed Energy
				Resources (January 28, 2010), Underwriters Laboratories Inc., 333 Pfingsten Road,
				Northbrook IL 60062-2096. This incorporation does not include any later amendments
				or editions.
"UL 1741 CRD for PCS" means the Certification Requirement Decision
				for Power Control Systems for the standard titled "Inverters, Converters,
				Controllers and Interconnection System Equipment for Use With Distributed Energy
				Resources" (March 8, 2019), Underwriters Laboratories Inc., 333 Pfingsten Road,
				Northbrook IL 60062-2096. This incorporation does not include any later amendments
				or editions.
"Utility-grade protective relay" means a protective relay system
				that works under a variety of environmental and operational conditions and that
				includes:
Test plugs/switches for testing the operation of the relay without
				unwiring or disassembly;
Targets to indicate relay operation;
Ability to record and store fault events; and
Conformance with IEEE C37.90, IEEE C37.90.1 and IEEE
				C37.90.2.
"Witness test" means a verification, either by an on-site
				observation or review of documents, that the interconnection installation evaluation
				required by IEEE Standard 1547 Section 5.3 and the commissioning test required by
				IEEE Standard 1547 Section 5.4 have been performed. For interconnection equipment
				that has not been lab-certified, the witness test shall also include verification of
				the on-site design tests as required by IEEE Standard 1547 Section 5.1 and
				verification of production tests required by IEEE Standard 1547 Section 5.2. All
				verified tests are to be performed in accordance with the test procedures specified
				by IEEE Standard 1547.1.