Figure 1: Load Masking Table 1: Operational Need for Real Time Data Operational Data Need Intended Utility Personnel Data Need Data Frequency Need/Scan Rate Need for Data Frequency Reliability Concern and Related Need Moving Electrical Load Between Electrical Circuits (Operating Switching) Grid Operators 1547 Standard (active, reactive power, voltage, Within Seconds Operators need to know full electrical load served immediately served prior to switching (switching is transferring the electrical load on one circuit to another circuit) to make appropriate circuit transfer decisions maintaining safety and reliability Allowance of DER projects to remain on line during circuit switching and to ensure that the electrical load can be served and ensuring that electrical configuration does not contribute to an electrical overload or over-voltages the switching is performed System Diagnostics for Grid Outages Grid Operators 1547 Standard (active, reactive voltage, Within seconds In the event of an outage (planned or unplanned), operators need to identify what electrical load and generation was immediately served prior to the event occurring in order to reconfigure the distribution grid to meet load requirements Inability to reconfigure the system as needed can create or prolong system issues such as overloads or over voltages if load or generation was different than expected Circuit Automatic Grid Operators 1547 Standard (active, reactive voltage, Within seconds When an electrical feeder experiences a system disturbance and DERs as designed trips offline, when restoration occurs and DERs do not immediately as designed, operators must be able to aware of the intermittent masked load Inability to configure the system as needed can create system issues such as overload or over voltages Customer Maintenance and Related Load Grid Operators 1547 Standard (active, reactive Within seconds When an electrical feeder experiences a system disturbance, the need for restoration requires operators to identify Customers can request disconnect / reconnect to perform system maintenance and would have the ability to
The following stakeholder groups attended at least one meeting of the SIWG’s deliberations on Issue 5: ABB California Solar and Storage Association (CALSSA) California Energy Commission (CEC) California Energy Storage Alliance (CESA) California Independent System Operator (CAISO) Clean Coalition Enphase Energy Interstate Renewable Energy Council (IREC) Office of Ratepayer Advocates (ORA) Pacific Gas & Electric (PG&E) Southern California Edison (SCE) San Diego Gas and Electric (SDG&E) SMA America SunPower Sunrun SunSpec Alliance Tesla The Utility Reform Network (TURN) Underwriters Laboratories Xanthus Consulting International Working Group Meetings and Topics The table below shows the date, location, and topics covered for each meeting of Working Group One. 10/13/2017 9:30 a.m. - 12:00 p.m WebEx WG Introduction and Process Discussion Overview of Issue 1 (Should the Commission modify Fast Track Screen Q to minimize the number of distributed energy resource projects subjected to transmission cluster studies and, if so, how?) 10/18/2017 10:00 a.m. - 2:30 p.m San Francisco and WebEx WG discusses proposed solutions to 1 10/31/2017 9:30 a.m. - 12:00 p.m WebEx WG provides feedback on draft proposal for Issue 1 11/6/2017 9:30 a.m. - 12:00 p.m. WebEx Given the complexity of Issue 4 (telemetry), the working group will take the first hour of this meeting to hold a pre-discussion of the issue. Overview of Issue 2 (Should the Commission clarify the definition of “complex metering solutions” for storage facilities and, if so, how?) 11/9/2017 Issue 2