{"id":29415,"date":"2013-06-01T11:00:03","date_gmt":"2013-06-01T05:30:03","guid":{"rendered":"http:\/\/www.kopykitab.com\/blog\/?p=29415"},"modified":"2013-06-01T11:00:03","modified_gmt":"2013-06-01T05:30:03","slug":"power-flow-studies-notes","status":"publish","type":"post","link":"https:\/\/www.kopykitab.com\/blog\/power-flow-studies-notes\/","title":{"rendered":"Power Flow Studies Notes"},"content":{"rendered":"<h1 style=\"text-align: center;\">Power Flow Studies Notes<\/h1>\n<p>&nbsp;<\/p>\n<p>Power flow analysis\/studies is the preliminary step used in any\u00a0Power Evacuation Studies.<\/p>\n<p>Power flow calculations provide active and reactive power flows and bus voltage magnitude and their phase angle at all the buses for a specified power system configuration and operating condition subject to the generation\u00a0<strong><em>and\/or<\/em><\/strong>\u00a0regulating capabilities of generators, synchronous condensers, static var compensators, HVDC controls, FACTS controllers, tap changing under load transformers and specified net interchange between individual operating systems (utilities). This information is essential for the continuous evaluation of the current performance of a power system and for analyzing the effectiveness of alternative plans for system expansion to meet increased load demand. These analyses require the calculation of numerous power flow cases for both normal, and emergency (contingency) operating conditions. The output from power flow studies often provide the initial conditions needed for other analysis, such as short circuit studies, transient stability, economic dispatch, dynamic stability studies.<\/p>\n<hr \/>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_47_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">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=\"ez-toc-toggle-icon-1\"><label for=\"item-69e73ae7ccfe1\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #000000;color:#000000\" 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: #000000;color:#000000\" 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><\/label><input  type=\"checkbox\" id=\"item-69e73ae7ccfe1\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.kopykitab.com\/blog\/power-flow-studies-notes\/#applications-of-power-flow-study-and-analysis\" title=\"Applications of Power Flow Study and Analysis\">Applications of Power Flow Study and Analysis<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.kopykitab.com\/blog\/power-flow-studies-notes\/#the-following-general-criteria-of-acceptability-of-design-is-used-in-power-flow-studies\" title=\"The following general criteria of acceptability of design is used in power flow studies\">The following general criteria of acceptability of design is used in power flow studies<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"applications-of-power-flow-study-and-analysis\"><\/span>Applications of Power Flow Study and Analysis<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<hr \/>\n<p>Power flow study has the following applications<\/p>\n<ol>\n<li>Transmission expansion planning , operation planning<\/li>\n<li>Distribution expansion planning , operation planning<\/li>\n<li>Industrial\/Commercial distribution system planning, operational planning<\/li>\n<li>Network interconnection, Grid interconnection studies<\/li>\n<li>Evaluation of energy transactions between various stake holders<\/li>\n<li>Energy audit to accurately determine network losses and estimate billing losses if any<\/li>\n<li>Sizing of transformers, cables, overhead lines, transformer tap ranges, shunt capacitors, shunt reactors, reactive power management, FACTS devices, HVDC operation<\/li>\n<li>System security assessment via static contingency studies<\/li>\n<li>Decision making tool in operation planning and operation of the system in load dispatch center<\/li>\n<li>Motor starting studies using load flow type analysis, where the starting impedance of the Induction motor is modeled as constant impedance model with starting impedance.<\/li>\n<li>Evaluation of static voltage stability using load flow technique<\/li>\n<\/ol>\n<hr \/>\n<h3><span class=\"ez-toc-section\" id=\"the-following-general-criteria-of-acceptability-of-design-is-used-in-power-flow-studies\"><\/span>The following general criteria of acceptability of design is used in power flow studies<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<hr \/>\n<ol start=\"1\">\n<li>Voltage Drop at all buses should be within +\/- 5% of the nominal rating for all operating conditions considered<\/li>\n<li>No over load conditions of any electrical circuits for all operating conditions considered<\/li>\n<li>Reactive power generation\/import\/export to be within specified limits for all operating conditions considered<\/li>\n<li>Ensuring quality\u00a0power supply to all loads, under specified contingency conditions, as per design philosophy adopted.<\/li>\n<\/ol>\n<p>The following study cases\/ power flow outputs are generally considered in power flow studies<\/p>\n<ol start=\"1\">\n<li>Extreme operating conditions of maximum and minimum loading conditions will be considered to check the adequacy of the network, even though some of these conditions may not exist during normal operation<\/li>\n<li>Contingency conditions such as outage of lines, transformers, generators will be considered and network adequacy for power evacuation will be assessed<\/li>\n<li>Operating solutions such\u00a0\u00a0as transformer taps, Generator Excitation, shunt reactive power compensations will be provided as needed.<\/li>\n<li>Recommendations for strengthening and equipment upgradations will be provided to meet specific operating requirements.<\/li>\n<li>Summary of load flow studies and concise reports in tabular formats and single line diagram formats will be provided, along with the summary of recommendations.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Power Flow Studies Notes &nbsp; Power flow analysis\/studies is the preliminary step used in any\u00a0Power Evacuation Studies. Power flow calculations provide active and reactive power flows and bus voltage magnitude and their phase angle at all the buses for a specified power system configuration and operating condition subject to the generation\u00a0and\/or\u00a0regulating capabilities of generators, synchronous &#8230; <a title=\"Power Flow Studies Notes\" class=\"read-more\" href=\"https:\/\/www.kopykitab.com\/blog\/power-flow-studies-notes\/\" aria-label=\"More on Power Flow Studies Notes\">Read more<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":""},"categories":[4773],"tags":[2867],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/29415"}],"collection":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/comments?post=29415"}],"version-history":[{"count":0,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/29415\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/media?parent=29415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/categories?post=29415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/tags?post=29415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}