{"id":4421,"date":"2025-03-04T11:19:17","date_gmt":"2025-03-04T05:49:17","guid":{"rendered":"https:\/\/study.madeeasy.in\/?p=4421"},"modified":"2025-07-16T13:32:02","modified_gmt":"2025-07-16T08:02:02","slug":"transient-stability","status":"publish","type":"post","link":"https:\/\/www.madeeasy.in\/study\/ee\/power-generation-concepts\/transient-stability","title":{"rendered":"Factor Affecting Transient Stability"},"content":{"rendered":"<p style=\"text-align: justify;\">It has been seen that transient stability is greatly affected by the type and location of a fault, so that a power system analyst must at the very outset of a stability study decide on these two factors. Following are few methods of improving the transient stability limit of a power system.<\/p>\n<h2 style=\"text-align: justify;\">Methods of its ImprovementIts<\/h2>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_1 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.madeeasy.in\/study\/ee\/power-generation-concepts\/transient-stability\/#1-Higher-inertia-constant-of-the-machine\" >1. Higher inertia constant of the machine:\u00a0\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.madeeasy.in\/study\/ee\/power-generation-concepts\/transient-stability\/#2-By-increasing-the-system-voltage\" >2. By increasing the system voltage:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.madeeasy.in\/study\/ee\/power-generation-concepts\/transient-stability\/#3-By-reducing-the-transfer-reactance\" >3. By reducing the transfer reactance:<\/a><\/li><\/ul><\/nav><\/div>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1-Higher-inertia-constant-of-the-machine\"><\/span><strong style=\"font-size: 16px;\">1. Higher inertia constant of the machine:\u00a0\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">From swing equation , <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4422\" src=\"https:\/\/study.madeeasy.in\/wp-content\/uploads\/2025\/03\/swing-equation.png\" alt=\"Swing Equation\" width=\"70\" height=\"56\" \/> accelerating power the acceleration of the rotor is inversely proportional to the moment of inertia of the machine. Hence, higher the moment of inertia of the machine the slower will be the change in the rotor angle of the machine and thus will allow a longer time for the operation of the breaker to isolate the fault before the machine passes through the clearing angle.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2-By-increasing-the-system-voltage\"><\/span><strong> 2.<\/strong> <strong>By increasing the system voltage:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">With the increase in system voltage maximum power P<sub>max<\/sub> is increased due to which machine is allowed to rotate through large angle before if reaches the critical clearing angle which results in greater critical clearing time and the probability of maintaining stability.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3-By-reducing-the-transfer-reactance\"><\/span><strong>3. By reducing the transfer reactance:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Use of parallel lines etc. as discussed earlier increases P<sub>max<\/sub> resulting in increase in transient stability limit as mentioned above.<br \/>\n<strong>4.<\/strong> By using high neutral grounding impedance in systems where stability is of prime importance.<br \/>\n<strong>5.<\/strong> By using high speed circuit breakers.<br \/>\n<strong>6.<\/strong> By using high speed excitation systems.<br \/>\n<strong>7.<\/strong> By using single pole switches.<br \/>\n<strong>8.<\/strong> By using autoreclosing units.<br \/>\n<strong>9.<\/strong> By using automatic voltage regulators (AVRs).<\/p>\n<p style=\"text-align: center;\"><a class=\"btn btn-danger\" role=\"button\" href=\"https:\/\/study.madeeasy.in\/ee\/power-generation-concepts\/fault-subsequent-clearance\/\" target=\"_blank\" rel=\"noopener\">&lt;&lt; Previous<\/a> | <a class=\"btn btn-success\" role=\"button\" href=\"https:\/\/study.madeeasy.in\/ee\/power-generation-concepts\/power-system-protection\/\" target=\"_blank\" rel=\"noopener\"> Next &gt;&gt;<\/a><br \/>\n<strong> Must Read: <\/strong> <a href=\"https:\/\/study.madeeasy.in\/subjects\/what-is-power-generation\/\" target=\"_blank\" rel=\"noopener\"><strong>What is Power Generation?<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It has been seen that transient stability is greatly affected by the type and location of a fault, so that<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1221,5],"tags":[1270,1269,1268],"class_list":["post-4421","post","type-post","status-publish","format-standard","hentry","category-power-generation-concepts","category-ee","tag-automatic-voltage-regulators","tag-speed-excitation-systems","tag-system-voltage"],"_links":{"self":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/posts\/4421","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/comments?post=4421"}],"version-history":[{"count":0,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/posts\/4421\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/media?parent=4421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/categories?post=4421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/tags?post=4421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}