Abstract: The invention relates to a system and method for protecting against faults between turns in excitation windings of synchronous machines with static excitation, which is based on comparison between the excitation intensity measured and the theoretical excitation current calculated for that operating point using the voltage and current measurements in the armature.

Abstract: The invention relates to a system and method for protecting against faults between turns in excitation windings of synchronous machines with static excitation, which is based on comparison between the excitation intensity measured and the theoretical excitation current calculated for that operating point using the voltage and current measurements in the armature.

Abstract: A system and method for monitoring a rapid de-excitation system for synchronous machines with indirect excitation, via an exciter machine and a rotating rectifier bridge includes means for measuring the current and voltage of the stator of a synchronous machine, means for measuring the excitation current of the exciter machine, estimation means for obtaining the estimated excitation current of the exciter machine from the current and voltage values measured in the stator of the synchronous machine, a module for comparing the measured excitation current Imed with the estimated excitation current Iest, in such a way that there is either incorrect operation if Imed >k*Iest+A, where k and A are real numbers determined on the basis of each machine, or else there is correct operation.

Abstract: A system and method for monitoring a rapid de-excitation system for synchronous machines (1) with indirect excitation, via an exciter machine (2) and a rotating rectifier bridge (8), comprising: means for measuring the current (13) and voltage (14) of the stator (4) of the synchronous machine (1); means for measuring the excitation current (15) of the exciter machine (2); estimation means (24) for obtaining the estimated excitation current (19) of the exciter machine (2) from the current (16) and voltage (17) values measured in the stator (4) of the synchronous machine (1); a module (28) for comparing the measured excitation current Imed (18) with the estimated excitation current Iest (19), in such a way that: there is either incorrect operation if Imed>·Iest+A, where k and A are real numbers determined on the basis of each machine; or else there is correct operation.

Abstract: The present invention allows increasing the net electric power supplied to the network by the solar thermal power plants of the cylindrical parabolic collector type by using the solar field in a more efficient manner, generating steam to drive the main ancillaries by means of steam turbines (turbo pumps), reducing electric consumption of the ancillary services and therefore increasing the net electric power of the plant. On days when the solar radiation is greater than the designed radiation, part of the solar field must stop being used since the generator and the turbine would exceed its designated power. The present system proposes harnessing the unused portion of the solar field for generating steam to drive the main ancillaries of the plant, energy which would otherwise not be harnessed. In addition, the overall operating performance of the ancillary service pumps is better when using steam to drive the pumps through a steam turbine (turbo pumps) instead of driving them with electric motors (motor pumps).

Abstract: The invention relates to a rapid deexcitation system for synchronous machines (1) with indirect excitation by means of an excitation machine (2) and rotating rectifier bridge (8) comprising: a deexcitation impedance (10) connected between the field winding (5) of the synchronous machine (1) and the rotating rectifier bridge (8); a controller (9) connected in parallel with the deexcitation impedance (10); a control circuit (11) of the controller (9) configured to: keep the controller (9) closed such that the rotating rectifier bridge (8) directly feeds the field winding (5) of the synchronous machine (1) during normal operation of the synchronous machine (1); open the controller (9) such that the deexcitation impedance (10) remains in series with the field winding (5) and with the rotating rectifier bridge (8) when the synchronous machine is to be deexcited.