GovSteam1 : Documentation diagram
Created: 04/04/2012 10:08:56 AM
Modified: 05/26/2012 05:44:57 PM
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<b>Parameter Notes:</b><br /></p><p><ol><li>Per unit parameters are on base of <b>MWbase</b>, which is normally the MW capability of the turbine.</li><br /></p><p><li><b>T3</b> must be greater than zero.  All other time constants may be zero.</li><br /></p><p><li>For a tandem-compound turbine the parameters <b>K2</b>, <b>K4</b>, <b>K6</b>, and <b>K8</b> are ignored. For a cross-compound turbine, two generators are connected to this turbine-governor model.</li><br /></p><p><li>Each generator must be represented in the load flow by data on its own MVA base.  The values of <b>K1</b>, <b>K3</b>, <b>K5</b>, <b>K7</b> must be specified to describe the proportionate development of power on the first turbine shaft.  <b>K2</b>, <b>K4</b>, <b>K6</b>, <b>K8</b> must describe the second turbine shaft. Normally <b>K1</b> + <b>K3</b> + <b>K5</b> + <b>K7</b> = 1.0 and <b>K2</b> + <b>K4</b> + <b>K6</b> + <b>K8</b> = 1.0  (if second generator is present).</li><br /></p><p><li>The division of power between the two shafts is in proportion to the values of MVA bases of the two generators.  The initial condition load flow should, therefore, have the two generators loaded to the same fraction of each one’s MVA base.</li><br /></p><p><li><font color="#0f0f0f">The intentional input speed deadband follows the relationship shown in the GovSteamIEEE1InputSpeedDeadband diagram.</font></li><br /></p><p><li><font color="#0f0f0f">The unintentional deadband can be used to represent backlash hysteresis in the control components by the relationship shown in the GovSteamIEEE1BacklashHysteresis diagram.</font></li><br /></p><p><li>The nonlinear gain between gate position and power may be input with up to 6 points.  The (0.,0.) and (1.,1.) points are assumed and need not be input.  The output is not allowed to go beyond 0. and 1. However, if <b>Pmax</b> > 1., the input and output are scaled by <b>Pmax</b>.</li><br /></p><p><li>If <b>GV1</b> is input as a negative number, the default full-arc steam valve curve shown in the “typical data” will be used.  If input is omitted or if all zero values are input, a straight line is used.</li><br /></p><p><li><b>Pref</b> has units of p.u. power.</li><br /></p><p></ol><br /></p>