Utah Admin. Code R746-312-12 - Interconnection Monitoring

(1) Generating facilities approved and interconnected to the public utility under the Level 1 and Level 2 interconnection review processes, and generating facilities with nameplate capacities of 3 megawatts or less approved under the Level 3 interconnection review process, except as noted in Section R746-312-12, are not required to provide for remote monitoring of the electric output by the public utilities.

(2) Generating facilities approved under Level 3 Interconnection Applications with Electric Nameplate Capacities greater than 5 MW or Level 3 Interconnection Applications if the aggregated generation on the circuit, including the interconnection customer's generating facility, would exceed 50% of the line section annual peak load may be required to provide remote monitoring at the public utility's discretion if the public utility has required this monitoring of its own facilities.

(3) If a public utility determines monitoring data provided by telemetry is necessary for safe, reliable, and efficient operations of a proposed generating facility with an electric nameplate capacity of greater than 3 megawatts to 5 megawatts, the public utility may petition the commission on a case-by-case basis to impose monitoring and telemetry requirements on the facility. The petition must be accompanied by evidence supporting telemetry needs and requirements.

(4) For generating facilities required to provide remote monitoring pursuant to Subsections R746-312-12(2) and R746-312-12(3), the data acquisition and transmission to a point where it may be used by the public utility's control system operations must meet the performance-based standards as follows:

(a) Any data acquisition and telemetry equipment required by this rule must be installed, operated, and maintained at the interconnection customer's expense.

(b) Telemetry requirements:

(i) parties may mutually agree to waive or change any of the telemetry requirements contained in Subsection R746-312-12(4)(b).

(ii) the communication must take place via a Private Network Link using a Frame Relay or Fractional T-1 line or other suitable device. Dedicated Remote Terminal Units, from the generating facility to the public utility's substation and energy management system are not required.

(iii) a single communication circuit from the generating facility to the public utility is sufficient.

(iv) communications protocol must be DNP 3.0 or other standard used by the public utility.

(v) the generating facility must be capable of sending telemetric monitoring data to the public utility at a minimum rate of every two seconds, from the output of the generating facility's telemetry equipment to the public utility's energy management system.

(vi) the least data points that a generator facility shall provide telemetric monitoring to the public utility are:

(A) net real power flowing out or into the generating facility, measured as analog;

(B) net reactive power flowing out or into the generating facility, measured as analog;

(C) bus bar voltage at the point of common coupling, measured as analog;

(D) data processing gateway (DPG) heartbeat, used to certify the telemetric signal quality; and

(E) on-line or off-line status.

(vii) If an interconnection customer operates the equipment associated with the high voltage switchyard interconnecting the generating facility to the public utility's distribution system, and shall provide monitoring and telemetry, the interconnection customer must provide the following monitoring to the public utility in addition to the provisions in Subsection R746-312-12(4)(b)(vi):

(A) switchyard line and transformer MW and MVAR values;

(B) switchyard bus voltage; and

(C) switching devices status.

Notes

Utah Admin. Code R746-312-12

Amended by Utah State Bulletin Number 2017-2, effective 12/22/2016 Amended by Utah State Bulletin Number 2024-08, effective 4/9/2024