Distributed generation in Wisconsin and in other states has undergone significant changes in the 16 years since promulgation of PSC 119. The number of distributed generation installations throughout the state has grown substantially, increasing the volume of applications and presenting new engineering and reliability considerations. Technological development has accelerated; new technologies have emerged that affect interconnection that were not contemplated in the development of the initial rule; and updated technical and certification standards have been established. Further technological developments and increases in deployment are also expected to occur in future years, highlighting the value of establishing rule provisions that can effectively deal with continuing change.
The objective of this rulemaking will be to establish revisions to PSC 119 that address these changes, while meeting the established goals to maintain uniform interconnection requirements, support distributed generation development, and address engineering, reliability and safety concerns. These revisions will identify changes to application processes, including but not limited to, enhanced communication and information sharing, that can help maintain timely processing while meeting the needs of both applicants and utilities. Revisions will also identify updated technical requirements that align with current industry standards; address interconnection considerations raised by new technologies; other new technological developments; and enable distributed generation to be used as effectively as possible to support system reliability and provide value for utilities and ratepayers. Where feasible, revisions will also seek to position the rules to efficiently respond to technology changes or other technical issues that may emerge in future years.
Revisions to PSC 119 will be developed with the advice of an advisory committee created under Wis. Stat. § 227.13. 3. Statutory authority for the rule (including the statutory citation and language):
This rule is authorized under Wis. Stat. §§ 196.02(1) and (3), 196.496(2), 196.03(1), 196.19(2), 196.20(1), 196.37(2), and 227.11.
Section 227.11 authorizes agencies to promulgate administrative rules. Section 196.02(1) authorizes the Commission to do all things necessary and convenient to its jurisdiction. Section 196.02(3) grants the Commission specific authority to promulgate rules. Section 196.03(1) requires public utilities to provide reasonably adequate service and facilities. Section 196.19(2) requires public utilities to file all rules and regulations that in the judgment of the Commission affect service. Section 196.20(1) requires public utilities to include all service rules in their rate schedules, and file changes in rate schedules with the Commission. Section 196.37(2) authorizes the Commission to exercise control over the service rules that a public utility has with its consumers and requires the Commission to make a just or reasonable order if the Commission finds that the service is unjust, insufficient, or unlawful. As described above, Section 196.496(2) directs the Commission to promulgate rules regarding the interconnection of distributed generation facilities to electric distribution facilities. 4. Estimate of the amount of time that state employees will spend to develop the rule, and of other resources necessary to develop the rule:
The Commission estimates that approximately 450 hours of employee time will be required to update the interconnection rules.
5. Description of all entities that may be impacted by the rule:
Electric utilities; developers and installers of distributed generation facilities; utility customers who use or may seek to use distributed generation technologies; and stakeholders interested in the development and deployment of distributed generation technologies.
6. Summary and preliminary comparison of any existing or proposed federal regulation that is intended to address the activities to be regulated by the rule:
The Federal Energy Regulatory Commission (FERC) has addressed interconnection considerations through FERC Order No. 841 concerning electric storage resources (issued 2018), FERC Order No. 872 concerning updates to the Public Utility Regulatory Policies Act of 1978 (PURPA) (issued 2020), and FERC Order No. 2222 concerning distributed energy resources more generally (issued 2020).
In those Orders, FERC declined to issue regulations regarding interconnection to the distribution facilities owned by the electric utility serving the customer. Order Nos. 841 and 2222 do address participation in electricity markets operated by regional transmission organizations (such as the Midcontinent Independent System Operator, Inc. or MISO, which serves this role in Wisconsin) by interconnected resources. However, Order Nos. 841 and 2222 both explicitly established that nothing in the Orders preempts the right of states to regulate the safety and reliability of their own distribution systems, and states that all distributed energy resources affected by the Orders must comply with any applicable state rules related to interconnection with the customer’s own electric utility.
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