National communication base station inverter standardization

What is the purpose of a standard for inverter-based resources?

Purpose: This standard provides uniform technical minimum requirements for the interconnection, capability, and performance of inverter-based resources interconnecting with transmission and sub-transmission systems.

Which inverter settings should be approved by the company?

settings shall be approved by the Company. IEEE 1547 compliant and UL-1741 certified18 inverters shall be equipped with an internal active anti-islanding scheme, under voltage (27), over voltage (59), under frequency (81U) and over frequency (81O) relays.

What are the requirements pertaining to inverter-based resources?

Elements of these requirements pertaining to inverter-based resources include, but are not limited to, the following: Any transmission line(s) connecting the inverter-based resource from the substation transformer to the POI should be modeled to the same level of accuracy that is used by the TO for other similar BPS elements.

Do generator nameplates meet ANSI standards?

Equipment nameplates shall meet American National Standards Institute (ANSI) standards. De-rating of generator facility equipment shall be evaluated on a case-by-case basis, with consideration given to specific project conditions, and may be accepted at the sole discretion of the Company.

Which inverter types will be reviewed under section 76.12.5 requirements?

Any inverter type generation established as frequency and/or voltage regulating or Var supportive will be reviewed under Section 7.6.12.5 requirements. DER threshold values shall be analyzed in aggregate where multiple DER projects are supplied from a single point of connection to the EPS.

Are BPs-connected inverter-based resources better than low voltage connected distributed energy resources?

BPS-connected inverter-based resources may cause less voltage fluctuation (flicker) concerns than low voltage connected distributed energy resources due to a higher reactance-to-resistance (X/R) ratio in HV/EHV systems, and the capability of BPS-connected inverter-based resources to automatically control voltage.