GovTLCFB1 : Documentation diagram
Created: 04/09/2012 11:08:48 AM
Modified: 04/13/2012 11:27:28 AM
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<font color="#0f0f0f"><b>Parameter Notes:</b></font><br /></p><p><ol><li>The load reference of this supervisory load control loop is accessible as the parameter, <b>Pmwset</b>. <b>Pmwset</b> is given a value automatically when the model is initialized. This value overwrites any value entered prior to initialization. </li><br /></p><p><li>The controller acts by applying a bias to the turbine-governor speed load reference, <b>Pref</b>. This reference is initialized in the normal manner by the turbine-governor model. </li><br /></p><p><li>The output of the controller is limited to plus or minus <b>Irmax</b>. To prevent the controller from adjusting the turbine power excessively, <b>Irmax</b> should not exceed approximately one half of the governor droop or approximately 0.025 per unit.</li><br /></p><p><li>The error limit, <b>Emax</b>, is intended to set a maximum rate of change of turbine power. If limitation of load change rate is desired, <b>Emax</b> should be set such that <b>Emax</b> = (max rate, p.u.sec)*(droop of governor in p.u.)/(<b>Ki</b> of GovTLCFB1). Note that that governor droop used in this calculation must be in per unit relative to the base power, <b>MWbase</b>, of the turbine. Note, also, that some governor models (such as GovSteamIEEE1) have their droop specified by the value of a gain whose value is the reciprocal of the droop. For example, in GovSteamIEEE1 the droop is specified by the gain, <b>K</b>, whose typical value is 1/0.04 = 25.</li><br /></p><p><li>This model recognizes the two alternative ways of specifying the turbine-governor load reference. In models such as GovCT1 and GovHydro1, the reference is a speed setpoint. In other models such as GovSteamIEEE1 the reference is a per unit load value. The references are generally as follows: 1) speed reference (1 + [initial power or valve position]*[droop]), 2) load reference (0 + [initial power or valve position]).  The parameters of GovTLCFB1, other than <b>Type</b>, must always be set on the basis of a governor speed reference.</li><br /></p><p></ol><br /></p>