초록 ▼

A method and system of regulating an output voltage of a boiling water reactor nuclear reactor plant recirculation system motor generator are provided. The method includes sensing an alternator output voltage and transmitting an alternator output voltage signal to a voltage regulator circuit, sensin

A method and system of regulating an output voltage of a boiling water reactor nuclear reactor plant recirculation system motor generator are provided. The method includes sensing an alternator output voltage and transmitting an alternator output voltage signal to a voltage regulator circuit, sensing an alternator speed and transmitting an alternator speed signal to the voltage regulator circuit, comparing the alternator output voltage signal to the alternator speed signal with a volts per hertz divider network electrically coupled to the alternator output voltage sensing circuit and the alternator speed sensing device, adjusting a capacitive reactance of the voltage regulator with a lead compensation circuit electrically coupled in series with the volts per hertz divider network, and adjusting a current in a control winding of a saturable reactor.

대표청구항 ▼

1. A method of regulating an output voltage of a boiling water reactor nuclear reactor plant recirculation system motor generator, said method comprising:sensing an alternator output voltage and transmitting an alternator output voltage signal to a voltage regulator circuit;sensing an alternator spe

1. A method of regulating an output voltage of a boiling water reactor nuclear reactor plant recirculation system motor generator, said method comprising:sensing an alternator output voltage and transmitting an alternator output voltage signal to a voltage regulator circuit;sensing an alternator speed and transmitting an alternator speed signal to the voltage regulator circuit;comparing the alternator output voltage signal to the alternator speed signal with a volts per hertz divider network electrically coupled to the alternator output voltage sensing circuit and the alternator speed sensing device;adjusting a capacitive reactance of the voltage regulator with a lead compensation circuit electrically coupled in series with the volts per hertz divider network; andadjusting a current in a control winding of a saturable reactor. 2. A method in accordance with claim 1 wherein sensing the alternator speed comprises sensing the speed with a tachometer generator. 3. A method in accordance with claim 1 wherein sensing the alternator speed comprises sensing the speed with a speed transducer. 4. A method in accordance with claim 1 wherein comparing the alternator output voltage signal to the alternator speed signal further comprises using a volts per hertz divider network that includes a potentiometer. 5. A method in accordance with claim 1 wherein comparing the alternator output voltage signal to the alternator speed signal comprises using a volts per hertz divider network that includes a make before break rotary switch and fixed resistors electrically coupled to the switch contacts. 6. A method in accordance with claim 1 wherein adjusting the capacitive reactance comprises:switching the lead compensation circuit into the regulator circuit;limiting current during a startup time period using a resistor; andbypassing the resistor at the end of the startup time period. 7. A method in accordance with claim 6 wherein switching the lead compensation circuit into the regulator circuit comprises:coupling a first lead of a variable resistance device to a first test point that is electrically coupled to a first lead of a lead compensation circuit engagement switch;coupling a second lead of the variable resistance device to a second test point that is electrically coupled to a second lead of the lead compensation circuit engagement switch;reducing a resistance of the variable resistance device to substantially zero ohms;closing the lead compensation circuit engagement switch; andremoving the variable resistance device first lead and second lead from the first test point and the second test point, respectively. 8. A method of bypassing the resistor at the end of the startup time period in accordance with claim 6 comprising bypassing the resistor at the end of a ten minute startup time period. 9. A method in accordance with claim 1 wherein adjusting the capacitive reactance comprises:bypassing a resistor in series with each of a plurality of capacitors to increase capacitive reactance and removing the bypass around the resistor in series with the capacitors to decrease capacitive reactance. 10. A voltage regulator for a boiling water reactor nuclear reactor plant recirculation system comprising:a variable frequency alternator;an alternator output voltage sensing circuit electrically coupled to a control circuit;an alternator speed sensing device electrically coupled to the control circuit;a volts per hertz divider network electrically coupled to said alternator output voltage sensing circuit and said alternator speed sensing device;a lead compensation circuit electrically coupled in series with said volts per hertz divider network; anda saturable reactor including a control winding electrically coupled to said volts per hertz divider network output, and a secondary winding electrically coupled to said alternator exciter. 11. A voltage regulator in accordance with claim 10 wherein said alternator speed sensing device comprises a tachometer generat or. 12. A voltage regulator in accordance with claim 10 wherein said alternator speed sensing device comprises a speed transducer. 13. A voltage regulator in accordance with claim 10 wherein said volts per hertz divider network comprises a potentiometer. 14. A voltage regulator in accordance with claim 10 wherein said volts per hertz divider network comprises a make before break rotary switch and fixed resistors electrically coupled to said switch contacts. 15. A voltage regulator in accordance with claim 10 wherein said lead compensation circuit comprises:an engagement switch that electrically couples said lead compensation circuit to said regulator;a current limiting resistor in electrical parallel with a switch contact; andat least one capacitor. 16. A voltage regulator in accordance with claim 15 wherein said switch further comprises a test point electrically coupled to a first lead of said switch and a second test point electrically coupled to a second lead of said switch. 17. A voltage regulator in accordance with claim 15 wherein said switch contact is a contact of a time delay relay. 18. A voltage regulator in accordance with claim 17 wherein said time delay relay is set for a time delay of 10 minutes. 19. A voltage regulator in accordance with claim 17 wherein said at least one capacitor comprises a plurality of capacitors and shorting contacts configured to selectively bypass each capacitor when said shorting contacts are in a closed first position and to not bypass said capacitor when in an open second position. 20. A voltage regulator in accordance with claim 17 wherein said at least one capacitor comprises a current limiting resistor electrically coupled in series with said capacitor and a shorting contact electrically coupled in parallel with each resistor configured to selectively bypass each resistor when said shorting contacts are in a closed first position and further configured to not bypass said resistor when said shorting contacts are in an open second position. 21. A voltage regulator in accordance with claim 10 wherein said volts per hertz divider network output is electrically coupled to a control winding of a saturable reactor. 22. A reactor recirculation system for a boiling water reactor nuclear reactor plant recirculation system comprising:a motor-generator set comprising a variable frequency alternator;a voltage regulator electrically coupled to said alternator;an alternator output voltage sensing circuit electrically coupled to a control circuit of said voltage regulator;an alternator speed sensing device electrically coupled to the control circuit;a volts per hertz divider network electrically coupled to said alternator output voltage sensing circuit and said alternator speed sensing device;a lead compensation circuit electrically coupled in series with said volts per hertz divider network; anda saturable reactor including a control winding electrically coupled to said volts per hertz divider network output, and a secondary winding electrically coupled to said alternator exciter. 23. A reactor recirculation system in accordance with claim 22 wherein said alternator speed sensing device comprises a tachometer generator. 24. A reactor recirculation system in accordance with claim 22 wherein said alternator speed sensing device comprises a speed transducer. 25. A reactor recirculation system in accordance with claim 22 wherein said volts per hertz divider network comprises a potentiometer. 26. A reactor recirculation system in accordance with claim 22 wherein said volts per hertz divider network comprises a make before break rotary switch and fixed resistors electrically coupled to said switch contacts. 27. A reactor recirculation system in accordance with claim 22 wherein said lead compensation circuit comprises:an engagement switch that electrically couples said lead compensation circuit to said regulator;a current limiting resistor in electrical parallel with a switch contact; andat least one cap acitor. 28. A reactor recirculation system in accordance with claim 27 wherein said switch further comprises a test point electrically coupled to a first lead of said switch and a second test point electrically coupled to a second lead of said switch. 29. A reactor recirculation system accordance with claim 27 wherein said switch contact is a contact of a time delay relay. 30. A reactor recirculation system in accordance with claim 29 wherein said time delay relay is set for a time delay of 10 minutes. 31. A reactor recirculation system in accordance with claim 29 wherein said at least one capacitor comprises a plurality of capacitors and shorting contacts configured to selectively bypass each capacitor when said shorting contacts are in a closed first position and to not bypass said capacitor when in an open second position. 32. A voltage regulator in accordance with claim 29 wherein said at least one capacitor comprises a current limiting resistor electrically coupled in series with said capacitor and a shorting contact electrically coupled in parallel with each resistor configured to selectively bypass each resistor when said shorting contacts are in a closed first position and further configured to not bypass said resistor when said shorting contacts are in an open second position. 33. A voltage regulator in accordance with claim 22 wherein said volts per hertz divider network output is electrically coupled to a control winding of a saturable reactor.