{"id":551,"date":"2025-07-02T12:57:08","date_gmt":"2025-07-02T12:57:08","guid":{"rendered":"https:\/\/www.perisic.com\/blog\/sanfoh\/?p=551"},"modified":"2025-07-02T12:57:08","modified_gmt":"2025-07-02T12:57:08","slug":"heathrow-power-outage-march-2025","status":"publish","type":"post","link":"https:\/\/www.perisic.com\/blog\/sanfoh\/2025\/07\/02\/heathrow-power-outage-march-2025\/","title":{"rendered":"Heathrow Power Outage March 2025"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Original Report: <\/p>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-c68430f6-e475-4fad-bbd8-13b1a7fbf7a2\" href=\"http:\/\/www.perisic.com\/blog\/sanfoh\/wp-content\/uploads\/2025\/07\/NESO-North-Hyde-Review-Final-Report-1.pdf\">NESO North Hyde Review &#8211; Final Report (1)<\/a><a href=\"http:\/\/www.perisic.com\/blog\/sanfoh\/wp-content\/uploads\/2025\/07\/NESO-North-Hyde-Review-Final-Report-1.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-c68430f6-e475-4fad-bbd8-13b1a7fbf7a2\">Download<\/a><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Podcast created via NotbookLM: <\/p>\n\n\n\n<figure class=\"wp-block-audio\"><audio controls src=\"http:\/\/www.perisic.com\/blog\/sanfoh\/wp-content\/uploads\/2025\/07\/North-Hyde-Substation-Outage_-Lessons-and-Recommendations_a.mp3\"><\/audio><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">(Summary from NotbookLM) This comprehensive report from the\u00a0<strong>National Energy System Operator (NESO)<\/strong>\u00a0details the\u00a0<strong>root causes, impacts, and recommendations<\/strong>\u00a0following a\u00a0<strong>major power outage and fire<\/strong>\u00a0at the\u00a0<strong>North Hyde 275kV substation on March 20, 2025<\/strong>. The incident, caused by a\u00a0<strong>catastrophic failure and fire on Supergrid Transformer 3 (SGT3)<\/strong>\u00a0due to\u00a0<strong>moisture ingress<\/strong>, led to the\u00a0<strong>tripping of two other transformers (SGT1 and SGT2)<\/strong>\u00a0and a\u00a0<strong>complete loss of supply<\/strong>\u00a0to\u00a0<strong>over 70,000 customers<\/strong>, including\u00a0<strong>Heathrow Airport<\/strong>, which subsequently closed. The report analyzes\u00a0<strong>asset management failures, site fire controls<\/strong>, and the\u00a0<strong>resilience of Critical National Infrastructure (CNI)<\/strong>, ultimately proposing\u00a0<strong>recommendations<\/strong>\u00a0for\u00a0<strong>improving energy system security and continuity of service<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Original Report: Podcast created via NotbookLM: (Summary from NotbookLM) This comprehensive report from the\u00a0National Energy System Operator (NESO)\u00a0details the\u00a0root causes, impacts, and recommendations\u00a0following a\u00a0major power outage and fire\u00a0at the\u00a0North Hyde 275kV substation on March 20, 2025. The incident, caused by &hellip; <a href=\"https:\/\/www.perisic.com\/blog\/sanfoh\/2025\/07\/02\/heathrow-power-outage-march-2025\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-551","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/posts\/551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/comments?post=551"}],"version-history":[{"count":1,"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/posts\/551\/revisions"}],"predecessor-version":[{"id":552,"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/posts\/551\/revisions\/552"}],"wp:attachment":[{"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/media?parent=551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/categories?post=551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.perisic.com\/blog\/sanfoh\/wp-json\/wp\/v2\/tags?post=551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}