2 August 5, 2010 Adopted by NERC Board of Trustees; Modified to Revised address Order No. 693 Directives contained in paragraphs 1858 and 1879. 2 January 10 2011 Revised 3 May 9, 2012 Adopted by NERC Board of Trustees; Modified to Revised add a WECC region variance 3 June 20, 2013 FERC issued order approving VAR-001-3 Revised November 21, R5 and associated elements approved by FERC for 3 Revised 2013 retirement as part of the Paragraph 81 project (Project 2013-02) February 6, 2014 Adopted by NERC Board of Trustees 4 Revised August 1, 2014 FERC issued letter order issued approving 4 4.1 August 25, 2015 Added to Requirement R5, 5.3 to read: Errata “or” schedules or Reactive Power 4.1 November 13, FERC Letter Order approved errata to Errata 2015 Docket RD15-6-000 4.2 June 14, 2017 Project 2016-EPR-02 errata recommendations Errata 4.2 August 10, 2017 Adopted by NERC Board of Trustees Errata 4.2 September 26, FERC Letter Order issued approving VAR-001-4.2 2017 Docket No. RD17-7-000. Guidelines and Technical Basis For technical basis for each requirement, please review the rationale provided for each requirement. Rationale: During development of this standard, text boxes were embedded within the standard to explain the rationale for various parts of the standard. Upon BOT approval, the text from the rationale text boxes was moved to this section. Rationale for R1: Paragraph 1868 of Order No. 693 requires NERC to add more "detailed and definitive requirements on and reactive and identify acceptable margins (i.e. voltage and/or “established limits” “sufficient resources”, reactive power margins)." Since Order No. 693 was issued, however, several FAC and TOP standards have become enforceable to add more requirements around voltage limits. More specifically, FAC-011 and FAC-014 require that System Operating Limits (SOLs) and reliability margins are established. The NERC Glossary
2 August 5, 2010 Adopted by NERC Board of Trustees; Modified to address Order No. 693 Directives contained in paragraphs 1858 and 1879. Revised 2 January 10 2011 Revised 3 May 9, 2012 Adopted by NERC Board of Trustees; Modified to add a WECC region variance Revised 3 June 20, 2013 FERC issued order approving VAR-001-3 Revised 3 November 21, 2013 R5 and associated elements approved by FERC for retirement as part of the Paragraph 81 project (Project 2013-02) Revised 4 February 6, 2014 Adopted by NERC Board of Trustees Revised 4 August 1, 2014 FERC issued letter order issued approving 4.1 August 25, 2015 Added “or” to Requirement R5, 5.3 to read: schedules or Reactive Power Errata 4.1 November 13, 2015 FERC Letter Order approved errata to Docket RD15-6-000 Errata 4.2 June 14, 2017 Project 2016-EPR-02 errata recommendations Errata 4.2 August 10, 2017 Adopted by NERC Board of Trustees Errata 4.2 September 26, 2017 FERC Letter Order issued approving VAR-001-4.2 Docket No. RD17-7-000. Guidelines and Technical Basis For technical basis for each requirement, please review the rationale provided for each requirement. Rationale: During development of this standard, text boxes were embedded within the standard to explain the rationale for various parts of the standard. Upon BOT approval, the text from the rationale text boxes was moved to this section. Rationale for R1: Paragraph 1868 of Order No. 693 requires NERC to add more "detailed and definitive requirements on “established limits” and “sufficient reactive resources”, and identify acceptable margins (i.e. voltage and/or reactive power margins)." Since Order No. 693 was issued, however, several FAC and TOP standards have become enforceable to add more requirements around voltage limits. More specifically, FAC-011 and FAC-014 require that System Operating Limits (SOLs) and reliability margins are established. The NERC Glossary
WECC-0128%20Posting%202%20VAR-001-4.2%20Redlined%20to%20Proposed%20Version%205.docx