{"id":1704,"date":"2019-09-24T13:42:46","date_gmt":"2019-09-24T13:42:46","guid":{"rendered":"https:\/\/www.trccompanies.com\/insights\/nerc-pursues-changes-to-protection-relay-and-control-prc-standards\/"},"modified":"2025-02-13T14:42:57","modified_gmt":"2025-02-13T14:42:57","slug":"nerc-pursues-changes-to-protection-relay-and-control-prc-standards","status":"publish","type":"news-and-insights","link":"https:\/\/www.trccompanies.com\/fr\/insights\/nerc-pursues-changes-to-protection-relay-and-control-prc-standards\/","title":{"rendered":"NERC Pursues Changes to Protection Relay and Control (PRC) Standards"},"content":{"rendered":"<!-- Start Block: acf\/wysiwyg -->\n\n<section class=\"wysiwyg section-padding bg-white\">\n    <div class=\"container-fluid\">\n        \n        <div class=\"row\">\n                            <div class=\"col-lg-8 columns js-animated-content animated-content\">\n                                        <p class=\"sub-heading\">Two Standards Authorization Requests (SARs) currently being debated in the NERC stakeholder engagement process could help clarify PRC standards obligations for generator owners and operators. \u00a0Utilities should monitor the following efforts to stay ahead of any changes that may be required to compliance programs and processes.<\/p>\n<h2>PRC-005-6 Protection System, Automatic Reclosing, and Sudden Pressure Relaying Maintenance<\/h2>\n<p>Revisions to PRC-005-6, which deals with Protection system maintenance, are being proposed to help provide the industry clear, unambiguous guidance on the scope of applicability of Automatic Voltage Regulation (AVR) protective functions. Without clear applicability, utilities that own generators are struggling to implement PRC-005-6 and are unsure what testing is acceptable to meet the required maintenance activities. The revisions under development would be applicable to owners of synchronous generating units with an installed digital AVR. NERC\u2019s SAR proposes a new section under \u201cFacilities\u201d to clearly delineate the applicability of the defined term \u201cProtection Systems\u201d associated with AVR protective functions, limiting the scope of the AVR protective functions to those elements that open a breaker either directly or via lockout or tripping auxiliary relays.<\/p>\n<p>While this effort is still in the early SAR commenting stages, the standard revisions which may result could help utilities maintain compliance when the standard goes into effect. \u00a0Some industry comments on the proposed revisions noted that in certain regions, AVR does not need to be included in PRC-005 standard maintenance programs. NERC is trying to resolve the issue to provide uniformity throughout North America. We recommend that generator owners and operators follow this standards development effort closely as it unfolds.<\/p>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/www.trccompanies.com\/contact-us\/\">Contact Us<\/a><\/p>\n                <\/div>\n                <div class=\"col-lg-4 columns js-animated-content animated-content\">\n                                        <div class=\"wysiwyg__links js-animated-content animated-content\">\n                        <div class=\"wysiwyg__links__top \">\n                                                        <h4>Related Services<\/h4>\n                                                                                    <ul class=\"js-animated-content animated-content\">\n                                                                <li><a href=\"https:\/\/www.trccompanies.com\/markets\/power-and-utilities\/electric-utilities\/\" target=\"_self\">Electric Utilities<\/a><\/li>\n                                                                <li><a href=\"https:\/\/www.trccompanies.com\/services\/electrical-power\/\" target=\"_self\">Electrical and Power<\/a><\/li>\n                                                                <li><a href=\"https:\/\/www.trccompanies.com\/markets\/power-and-utilities\/\" target=\"_self\">Power and Utilities<\/a><\/li>\n                                                                <li><a href=\"https:\/\/www.trccompanies.com\/services\/electrical-power\/protection-and-controls\/\" target=\"_self\">Protection and Controls<\/a><\/li>\n                                                            <\/ul>\n                                                    <\/div>\n                                                                                                            <div class=\"wysiwyg__links__bottom\">\n                                    <a href=\"https:\/\/www.trccompanies.com\/services\" target=\"_self\">View All Services<\/a>\n                                <\/div>\n                                                                                                <\/div>\n                <\/div>\n                    <\/div>\n\n            <\/div>\n<\/section>\n<!-- End Block: acf\/wysiwyg -->\n\n<!-- Start Block: acf\/wysiwyg -->\n\n<section class=\"wysiwyg section-padding bg-light-gradient\">\n    <div class=\"container-fluid\">\n                    <div class=\"wysiwyg__wrapper\">\n        \n        <div class=\"row\">\n                        <div class=\"col-lg-12\">\n                                                                                \n                                                <\/div>\n\n                            <div class=\"col-lg-12 js-animated-content animated-content\">\n                    <h3>PRC-024-2 Generator Frequency and Voltage Protective Relay Settings<\/h3>\n<p>NERC\u2019s Inverter Based Resources Task Force (IBRTF) has identified potential modifications to PRC-024-2 to help ensure that distributed energy resource (DER) inverter-based generator owners, operators, developers and equipment manufacturers understand the intent of the standard, so that inverter-based systems can adequately respond to grid disturbances and protect power system reliability.<\/p>\n<p>NERC assessed the following significant reliability gaps in a recent whitepaper:<\/p>\n<ul>\n<li>The standard is often interpreted and applied as a \u201cride-through standard\u201d, where it is fundamentally intended and approved to be a voltage and frequency protective settings standard. NERC recommends eliminating the use of the term in PRC-024-2 to add clarity.<\/li>\n<li>The region outside the \u201cNo-Trip\u201d zone of the PRC-024-2 curves should be clearly marked as a \u201cMay-Trip\u201d zone so it is not interpreted as a \u201cMust-Trip\u201d zone. The preferred behavior is for the generators to remain connected and producing current during disturbances to the greatest extent possible.<\/li>\n<li>Industry has noted difficulty interpreting point #5 of the Voltage Curve with respect to the relationship between crest and RMS voltage. There is inconsistency regarding the high voltage curve which uses phase-to-phase voltage only but the low voltage curve uses phase-to-phase or phase-to-ground voltage.<\/li>\n<li>There is confusion regarding footnote 1 and the applicability of inverter protective functions within the inverter control systems<\/li>\n<li>There is confusion as to the use of momentary cessation within the \u201cNo Trip\u201d zone of PRC-024-2.<\/li>\n<\/ul>\n<blockquote>\n<p>The initial draft standard did not receive industry approval in the balloting and comment process and has now moved into a second phase of revisions to address the comments received. A supplemental SAR has been developed to help move the process forward.<\/p>\n<p>TRC clients are urged to follow these standards development efforts particularly if they own, operate or their systems interconnect with inverter-based resources such as solar or wind generator plants.<\/p>\n<\/blockquote>\n                <\/div>\n                                <\/div>\n\n                    <\/div>\n            <\/div>\n<\/section>\n<!-- End Block: acf\/wysiwyg -->\n\n<!-- Start Block: acf\/innerpage-half-text-half-image -->\n\n<section class=\"half-and-half flex-row section-padding image-block-left bg-white text-column-one image-size-cover\">\n    <div class=\"half-and-half-image\">\n        <div class=\"half-and-half-image__wrap\">\n                                                <img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1328519978-1024x683.jpg\" class=\"object-fit\" alt=\"GettyImages-1328519978\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1328519978-1024x683.jpg 1024w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1328519978-300x200.jpg 300w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1328519978-768x512.jpg 768w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1328519978-1536x1024.jpg 1536w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1328519978-2048x1365.jpg 2048w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1328519978-900x600.jpg 900w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>                                    <\/div>\n    <\/div>\n    \n    <div class=\"half-and-half-text\">\n        <div class=\"half-and-half-text__wrapper js-animated-content animated-content\">\n                                        <h2>Be Prepared<\/h2>\n<p>NERC\u2019s standard activities focus on the minimum expectations that must be met by utilities to preserve reliability. Changes continue to be made as NERC responds to emerging challenges associated with a changing generation resource mix. To successfully maintain compliance TRC recommends ongoing observation and engagement with policy making bodies such as FERC, NERC and the Regions. Our team can provide an independent review of your compliance programs and internal controls to help you meet regulatory obligations.<\/p>\n                    <\/div>\n    <\/div>\n<\/section>\n<!-- End Block: acf\/innerpage-half-text-half-image -->\n\n<!-- Start Block: acf\/innerpage-related-materials -->\n<section class=\"material-cards bg-white-fog\">\n    <div class=\"container-fluid js-animated-content animated-content\">\n        <div class=\"material-cards__headlines  js-animated-content animated-content\">\n            <div class=\"material-card__content js-animated-content animated-content\">\n                <h3>Resources<\/h3>\n            <\/div>\n            <div class=\"material-card__link\">\n                            <\/div>\n        <\/div>\n        <div class=\"row js-related-material-slider js-related-marterial-container \" data-item=\"3\">\n                        <div class=\"col-xxs-12 col-lg-4 material-card-item\">\n                <div class=\"material-card\">\n                                            <div class=\"material-card__details \">\n                            <h5 class=\"material-card__title\">\n                                <img decoding=\"async\" width=\"30\" height=\"30\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/picture_as_pdf_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"picture_as_pdf_24dp-black\" \/>                                Industry Comments on Proposed PRC-005-6 SAR                            <\/h5>\n                            <p class=\"material-card__description\">Publi\u00e9 octobre 28, 2019<\/p>\n                        <\/div>\n                        <div class=\"material-card__bttn\">\n                                                        <a href=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/2019-04_PRC-005-6_SAR_Comments_Received_08282019.pdf\" target=\"_blank\"><span>t\u00e9l\u00e9charger le fichier<\/span><img decoding=\"async\" width=\"28\" height=\"28\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/sim_card_download_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"sim_card_download_24dp-black\" \/><\/a>\n                        <\/div>\n                                    <\/div>\n            <\/div>\n                        <div class=\"col-xxs-12 col-lg-4 material-card-item\">\n                <div class=\"material-card\">\n                                            <div class=\"material-card__details \">\n                            <h5 class=\"material-card__title\">\n                                <img decoding=\"async\" width=\"30\" height=\"30\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/picture_as_pdf_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"picture_as_pdf_24dp-black\" \/>                                PRC-024-2 Gaps Whitepaper                            <\/h5>\n                            <p class=\"material-card__description\">Publi\u00e9 D\u00e9cembre 20, 2019<\/p>\n                        <\/div>\n                        <div class=\"material-card__bttn\">\n                                                        <a href=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/NERC-IRPTF-PRC-024-2-Gaps-Whitepaper.pdf\" target=\"_blank\"><span>t\u00e9l\u00e9charger le fichier<\/span><img decoding=\"async\" width=\"28\" height=\"28\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/sim_card_download_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"sim_card_download_24dp-black\" \/><\/a>\n                        <\/div>\n                                    <\/div>\n            <\/div>\n                        <div class=\"col-xxs-12 col-lg-4 material-card-item\">\n                <div class=\"material-card\">\n                                            <div class=\"material-card__details \">\n                            <h5 class=\"material-card__title\">\n                                <img decoding=\"async\" width=\"30\" height=\"30\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/picture_as_pdf_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"picture_as_pdf_24dp-black\" \/>                                PRC-024 Supplemental SAR                            <\/h5>\n                            <p class=\"material-card__description\">Publi\u00e9 juin 14, 2019<\/p>\n                        <\/div>\n                        <div class=\"material-card__bttn\">\n                                                        <a href=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/2018-04_Supplemental_SAR_PRC-024_06272019.pdf\" target=\"_blank\"><span>t\u00e9l\u00e9charger le fichier<\/span><img decoding=\"async\" width=\"28\" height=\"28\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/sim_card_download_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"sim_card_download_24dp-black\" \/><\/a>\n                        <\/div>\n                                    <\/div>\n            <\/div>\n                        <div class=\"col-xxs-12 col-lg-4 material-card-item\">\n                <div class=\"material-card\">\n                                            <div class=\"material-card__details \">\n                            <h5 class=\"material-card__title\">\n                                <img decoding=\"async\" width=\"30\" height=\"30\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/picture_as_pdf_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"picture_as_pdf_24dp-black\" \/>                                PRC-024-3 Draft Standard                            <\/h5>\n                            <p class=\"material-card__description\">Publi\u00e9 avril 17, 2019<\/p>\n                        <\/div>\n                        <div class=\"material-card__bttn\">\n                                                        <a href=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/PRC-024-3_Redline_04172019.pdf\" target=\"_blank\"><span>t\u00e9l\u00e9charger le fichier<\/span><img decoding=\"async\" width=\"28\" height=\"28\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/sim_card_download_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"sim_card_download_24dp-black\" \/><\/a>\n                        <\/div>\n                                    <\/div>\n            <\/div>\n                        <div class=\"col-xxs-12 col-lg-4 material-card-item\">\n                <div class=\"material-card\">\n                                            <div class=\"material-card__details \">\n                            <h5 class=\"material-card__title\">\n                                <img decoding=\"async\" width=\"30\" height=\"30\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/picture_as_pdf_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"picture_as_pdf_24dp-black\" \/>                                PRC-005-6 Standards Authorization Request SAR                            <\/h5>\n                            <p class=\"material-card__description\">Publi\u00e9 <\/p>\n                        <\/div>\n                        <div class=\"material-card__bttn\">\n                                                        <a href=\"ttps:\/\/www.nerc.com\/pa\/Stand\/Project%20201904%20Modifications%20to%20PRC0056%20DL\/PRC-005-6_SAR_%202019_05_09_NAGF_07302019.pdf\" target=\"_blank\"><span>t\u00e9l\u00e9charger le fichier<\/span><img decoding=\"async\" width=\"28\" height=\"28\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/sim_card_download_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"sim_card_download_24dp-black\" \/><\/a>\n                        <\/div>\n                                    <\/div>\n            <\/div>\n                        <div class=\"col-xxs-12 col-lg-4 material-card-item\">\n                <div class=\"material-card\">\n                                            <div class=\"material-card__details \">\n                            <h5 class=\"material-card__title\">\n                                <img decoding=\"async\" width=\"30\" height=\"30\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/picture_as_pdf_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"picture_as_pdf_24dp-black\" \/>                                NERC Compliance Solutions                            <\/h5>\n                            <p class=\"material-card__description\">Publi\u00e9 <\/p>\n                        <\/div>\n                        <div class=\"material-card__bttn\">\n                                                        <a href=\"https:\/\/www.trccompanies.com\/services\/regulatory-environmental-consulting\/regulatory-compliance\/nerc\/\" target=\"_blank\"><span>t\u00e9l\u00e9charger le fichier<\/span><img decoding=\"async\" width=\"28\" height=\"28\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/08\/sim_card_download_24dp-black.svg\" class=\"attachment-full size-full\" alt=\"sim_card_download_24dp-black\" \/><\/a>\n                        <\/div>\n                                    <\/div>\n            <\/div>\n                    <\/div>\n\n        <div class=\"material-cards__bottom text-right hidden-lg\">\n                    <\/div>\n    <\/div>\n<\/section>\n<!-- End Block: acf\/innerpage-related-materials -->\n\n<!-- Start Block: acf\/innerpage-promotion-blocks -->\n\n<section class=\"image-cta\">\n    <img decoding=\"async\" width=\"724\" height=\"482\" src=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1353051112-1.jpg\" class=\"image-cta-bg object-fit\" alt=\"GettyImages-1353051112-1\" srcset=\"https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1353051112-1.jpg 724w, https:\/\/www.trccompanies.com\/wp-content\/uploads\/2024\/09\/GettyImages-1353051112-1-300x200.jpg 300w\" sizes=\"(max-width: 724px) 100vw, 724px\" \/>    <div class=\"image-cta-back-curve\">\n        <span class=\"top\"><\/span>\n        <span class=\"bottom\"><\/span>\n        <span class=\"left\"><\/span>\n        <span class=\"right\"><\/span>\n    <\/div>\n    <div class=\"image-cta-front-curve\">\n        <span class=\"top\"><\/span>\n        <span class=\"bottom\"><\/span>\n        <span class=\"left\"><\/span>\n        <span class=\"right\"><\/span>\n    <\/div>\n    <div class=\"image-cta-overlay\">\n        <div class=\"image-cta-content js-animated-content animated-content\">\n            <h2>About TRC<\/h2>\n<p>TRC\u2019s approach to power system planning and design balances solutions that incorporate appropriate standards, regulatory requirements, best practices, operational goals and budgets. Our work for public and private sector clients is a testament to our understanding of power system operations and planning and our successful application of technological solutions in a constantly evolving business and regulatory landscape.\u00a0 Our power system experts help you stay ahead of regulatory change because they stay engaged with the regulatory process and know how to plan, design and install programs that your financial, technical and scheduling goals including compliance with changing FERC and NERC Operations and Planning standards and guidelines.<\/p>\n<p><em>This regulatory update is a service to TRC\u2019s utility clients, helping keep you informed of issues that impact your company\u2019s electric system security risks along with related topics regarding future regulatory developments to help you achieve your company\u2019s business goals.<\/em><\/p>\n<p>For more information, contact\u00a0<a href=\"mailto:dachey@trccompanies.com\">Dylan Achey<\/a>\u2013 Manager, Generation Engineering.<\/p>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/www.trccompanies.com\/contact-us\/\">Contact Us<\/a><\/p>\n        <\/div>\n    <\/div>\n<\/section>\n\n<!-- End Block: acf\/innerpage-promotion-blocks -->","protected":false},"excerpt":{"rendered":"<p>Two Standards Authorization Requests currently being debated in the NERC stakeholder engagement process could help clarify PRC standards obligations for generator owners and operators. <\/p>\n","protected":false},"featured_media":5249,"template":"","tags":[596,523,251,280],"news-and-insights-category":[360],"services-category":[1005,1003],"custom_category":[1010],"class_list":["post-1704","news-and-insights","type-news-and-insights","status-publish","has-post-thumbnail","hentry","tag-electric-utility","tag-electrical-and-power-engineering","tag-nerc","tag-power-and-utilities","news-and-insights-category-regulatory-updates","services-category-electrical-and-power","services-category-engineering","custom_category-power-utilities-markets"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - 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