N-1Application
14 passages
1. PRC-029-1; PRC-024-4 - Inverter-based Resource (IBR) Ride-through Reliability Standards On July 24, 2025, FERC issued Order No. 909 approving Reliability Standards PRC-024- 4 (Frequency and Voltage Protection Settings for Synchronous Ge...
AI summary On July 24, 2025, FERC issued Order No. 909 approving Reliability Standards PRC-024-4 and PRC-029-1, which set requirements for frequency and voltage ride-through for various resources, including inverter-based resources. FERC directed NERC to address specific issues related to IBR equipment limitations and long-lead times for IBR design specifications.
Definition of Ride-through: Ride-through is defined as "The plant/facility remains connected and continues to operate through voltage or frequency disturbances." PRC-029-1 (Frequency and Voltage Ride-through Requirements for Inverter-based...
AI summary The document defines 'ride-through' as the ability of a plant or facility to remain connected and operational during voltage or frequency disturbances. It outlines Reliability Standards PRC-029-1 and PRC-024-4, which set requirements for inverter-based resources (IBRs) and synchronous generators to maintain system reliability during such events.
Figure 4: ERCOT Interconnection Boundaries
AI summary The text presents Figure 4, which depicts the ERCOT Interconnection Boundaries. This figure is relevant to understanding the geographic scope and interconnection points of the Electric Reliability Council of Texas (ERCOT) within the broader power grid infrastructure.
Table 4: Frequency Boundary Data Points – ERCOT Interconnection High Frequency Duration Low Frequency Duration Frequency (Hz) Minimum Time (Sec) Frequency (Hz) Minimum Time (sec) ≥61.8 Instantaneous11 ≤57.5 Instantaneous11 ≥61.6 30 ≤58.0 2...
AI summary Table 4 outlines frequency boundary data points for the ERCOT Interconnection, specifying minimum time thresholds for high and low frequency durations. It includes details such as instantaneous and continuous operation thresholds, indicating the conditions under which certain actions may be required.
PRC-024— Attachment 2A (Voltage No-Trip Boundaries – Quebec Interconnection) Figure 6: Voltage No-Trip Boundaries – Quebec Interconnection \ The area outside the "No Trip Zone" is not a "Must Trip Zone."
AI summary This document provides a visual representation of voltage no-trip boundaries for the Quebec Interconnection under PRC-024. It clarifies that areas outside the 'No Trip Zone' are not designated as 'Must Trip Zone.'
- 2.1.1 Continue to deliver the pre-disturbance level of Real Power or available Real Power4, whichever is less. 5 - 2.1.2 Continue to deliver Reactive Rower up to its Reactive Power limit and according to its controller settings. - 2.1.3...
AI summary The text outlines technical requirements for Inverter-based Resources (IBRs) during voltage disturbances, including power delivery priorities, voltage support, and operational limits. It specifies conditions under which IBRs must continue delivering real or reactive power and when they may enter current blocking mode.
Table 1: Voltage Ride-through Requirements for AC-Connected Wind IBR 13 Voltage (per unit) 14 Operation Region Minimum Ride- Through Time (sec) > 1.20 N/A 15 N/A ≥ 1.10 Mandatory Operation Region 1.0 > 1.05 Continuous Operation Region 1800...
AI summary The document outlines voltage ride-through requirements for AC-connected wind inverter-based resources (IBR) and other IBR. It specifies different operation regions and corresponding minimum ride-through times based on voltage levels, highlighting distinctions between wind IBR and all other IBR.
ltering lengths of one cycle (16.6 millisecond) are not permissible. - 11. The "must Ride-through zone" is the combined area of the mandatory operating regions, the continuous operating regions, and the permissive operating region. All are...
AI summary The text discusses permissible and mandatory operating regions for electrical systems, defining the 'must Ride-through zone' as the combined area of mandatory, continuous, and permissive operating regions, with the remaining area referred to as the 'may Ride-through zone'.
A. Introduction 1. Title: Extreme Cold Weather Preparedness and Operations 2. Number: EOP-012-3 3. Purpose: To address the effects of operating in extreme cold weather by ensuring each Generator Owner has developed and implemented plan(s)...
AI summary This document outlines the purpose of EOP-012-3, which is to ensure Generator Owners develop and implement plans to mitigate reliability impacts of extreme cold weather on their generating units.
4.2. Facilities: - 4.2.1. Bulk Electric System (BES) generating units. For purposes of this standard, the term "generating unit" subject to these requirements refers to the following BES resources: - 4.2.1.1. A Bulk Electric System generat...
AI summary The document defines 'generating unit' within the context of the Bulk Electric System (BES) and references the implementation plan for Project 2024-03. It outlines specific inclusions under the BES definition, such as Blackstart Resources and other generating resources.
Known Generator Cold Weather Constraints The following are circumstances which, if present and confirmed as valid by the CEA, will constitute known Generator Cold Weather Constraints: - Individual wind turbine towers manufactured prior to...
AI summary The document outlines known cold weather constraints for generators, including structural limitations of wind turbine towers and freeze protection measures for various energy systems. These constraints are confirmed by the Compliance Enforcement Authority and must be addressed to ensure system reliability in extreme cold.
b. The implementation of freeze protection measures would cause the Generator Owner to cancel plans to finish the development of a new generating unit (must be accompanied by an attestation signed by an officer of the company); - c. The im...
AI summary The text outlines conditions under which freeze protection measures may be implemented, including when they would cause a generator owner to cancel development plans, reduce power capabilities, or impact net dependable capacity, as defined by NERC's GADS reporting standards.
List of Currently Effective NERC Reliability Standards BAL-001-2 Real Power Balancing Control Performance BAL-001-TRE-2 Primary Frequency Response in the ERCOT Region BAL-002-3 Disturbance Control Standard – Contingency Reserve for Recover...
AI summary The document lists currently effective NERC Reliability Standards, focusing on power balancing, frequency response, cyber security, and communication protocols for the Bulk Electric System (BES). These standards ensure reliability and security in the electricity grid.
Any comments regarding this glossary should be reported to the NERC Help Desk. Select "Standards" from the "Service" drop-down menu and "Other" from the Standards Subcategory drop-down menu. Subject to Enforcement Bulk Electric System Proj...
AI summary The text discusses the definition and scope of the Bulk Electric System (BES) under Project 2010-17, including inclusions such as transformers, generating resources, blackstart resources, and dispersed power resources, as well as exclusions like radial systems.