Power duplication apparatus for HVDC system and control method therefor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/00
H02J-009/06
H02J-001/10
H02J-003/36
출원번호
US-0109009
(2014-12-26)
등록번호
US-10038336
(2018-07-31)
우선권정보
KR-10-2013-0167883 (2013-12-30)
국제출원번호
PCT/KR2014/012870
(2014-12-26)
국제공개번호
WO2015/102312
(2015-07-09)
발명자
/ 주소
Oh, Jae-Hoon
Kang, Hyo-Jin
출원인 / 주소
HYOSUNG CORPORATION
대리인 / 주소
Novick, Kim & Lee, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
1
초록▼
The present invention relates to a power duplication apparatus for an HVDC system and a control method therefor, and the power duplication apparatus for an HVDC system comprises: a first independent power generator receiving first input power so as to generate and output first power; a second indepe
The present invention relates to a power duplication apparatus for an HVDC system and a control method therefor, and the power duplication apparatus for an HVDC system comprises: a first independent power generator receiving first input power so as to generate and output first power; a second independent power generator receiving second input power so as to generate and output the first power; a first power supplier selectively receiving the first power output, respectively, from the first independent power generator and the second independent power generator so as to convert the first power into second power having a smaller size than that of the first power and output the same; a second power supplier for selectively receiving the first power output, respectively, from the first independent power generator and the second independent power generator so as to convert the first power into the second power having a smaller size than that of the first power and output the same; a first HVDC controller for receiving the second power output from the first power supplier so as to activate the same and control an HVDC converter; a second HVDC controller for receiving the second power output from the second power supplier so as to activate the same and control the HVDC converter; and a power monitoring controller for enabling the first power output from the first independent power generator or the second independent power generator, so as to generate the first power having the same size as that of the first reference power if the first power has a size different from that of the first reference power by comparing the sizes of the first power and pre-stored first reference power, to be transferred to the first power supplier and second power supplier.
대표청구항▼
1. A power duplication apparatus for a High Voltage Direct Current (HVDC) system, comprising: a first independent power generator for receiving first input power and generating and outputting first power;a second independent power generator for receiving second input power and generating and outputt
1. A power duplication apparatus for a High Voltage Direct Current (HVDC) system, comprising: a first independent power generator for receiving first input power and generating and outputting first power;a second independent power generator for receiving second input power and generating and outputting first power;a first power supply for selectively receiving the first power individually output from the first independent power generator and the second independent power generator, converting the received first power into second power having a magnitude less than that of the first power, and outputting the second power;a second power supply for selectively receiving the first power individually output from the first independent power generator and the second independent power generator, converting the received first power into second power having a magnitude less than that of the first power, and outputting the second power;a first HVDC controller configured to be activated by receiving the second power from the first power supply and to control an HVDC converter;a second HVDC controller configured to be activated by receiving the second power from the second power and to control the HVDC converter; anda power monitoring controller for comparing a magnitude of the first power with a magnitude of pre-stored first reference power, and for, when first power having a magnitude differing from the magnitude of the first reference power is present, allowing first power output from the first independent power generator or the second independent power generator, which generates the first power having a magnitude identical to that of the first reference power, to be transferred to the first power supply and the second power supply. 2. The power duplication apparatus of claim 1, wherein each of the first independent power generator and the second independent power generator comprises: an Uninterrupted Power Supply (UPS) configured to be charged by receiving the first input power or the second input power, generate the first power from the charged first input power or second input power, and output the first power; anda switch configured to individually receive the first power from the UPS to which the first input power is input or the UPS to which the second input power is input, and to be switched over under control of the power monitoring controller, thus outputting the first power to the first power supply or the second power supply. 3. The power duplication apparatus of claim 2, wherein: the switch includes a first contact terminal, a second contact terminal, and a third contact terminal,wherein the first contact terminal is connected to the UPS provided in the first independent power generator, the second contact terminal is connected to the UPS provided in the second independent power generator, and the third contact terminal is connected to the first power supply or the second power supply and is selectively connected to the first contact terminal or the second contact terminal under control of the power monitoring controller. 4. The power duplication apparatus of claim 1, wherein the first independent power generator and the second independent power generator use, as the first input power or the second input power, power generated from a power network with which the first HVDC controller and the second HVDC controller are associated, or power generated from a power network with which the first HVDC controller and the second HVDC controller are not associated. 5. The power duplication apparatus of claim 1, wherein each of the first power supply and the second power supply comprises: a first Switching Mode Power Supply (SMPS) unit configured to individually receive the first power supplied from the first independent power generator or the first power supplied from the second independent power generator, convert the first power into second power, and outputting the second power under control of the power monitoring controller; anda second SMPS unit arranged in parallel with the first SMPS unit, and configured to receive the first power, convert the first power into second power and output the second power under control of the power monitoring controller. 6. The power duplication apparatus of claim 1, wherein each of the first SMPS unit and the second SMPS unit comprises: a switch configured to receive the first power output from the first independent power generator or the second independent power generator, and turn on or off output of the first power under control of the power monitoring controller;an SMPS configured to receive the first power from the switch, convert the first power into the second power, and output the second power to the first HVDC controller or the second HVDC controller;a first diode connected to the switch and configured to prevent current from flowing from the SMPS into the first independent power generator due to counter electromotive force; anda second diode connected to the SMPS and configured to prevent current from flowing from the first HVDC controller or the second HVDC controller into the SMPS due to counter electromotive force. 7. The power duplication apparatus of claim 1, wherein: the switch includes a first contact terminal and a second contact terminal,the first contact terminal is connected to the first diode, and the second contact terminal is connected to the SMPS and is then connected to the first contact terminal under control of the power monitoring controller. 8. The power duplication apparatus of claim 7, wherein the SMPS comprises a capacitor, a lifespan of which is measured by the power monitoring controller using equivalent series resistance characteristics. 9. The power duplication apparatus of claim 1, wherein the power monitoring controller is configured to, when comparing a magnitude of the first power with a magnitude of the first reference power, compare current amounts or voltage levels of the first power and the first reference power with each other. 10. The power duplication apparatus of claim 1, wherein the power monitoring controller comprises a switch, which includes a first contact terminal, a second contact terminal, a third contact terminal, wherein the first contact terminal is connected to the first HVDC controller, the second contact terminal is connected to the second HVDC controller, and the third contact terminal is connected to the HVDC converter and is then selectively connected to the first contact terminal or the second contact terminal under control of the power monitoring controller. 11. A power duplication control method for an HVDC system, comprising: detecting, by a power monitoring controller, first power output from an Uninterrupted Power Supply (UPS);when the first power is detected, determining, by the power monitoring controller, whether the first power falls within a normal range matching a range of a preset first reference voltage;if it is determined that the first power does not fall within the normal range, switching over, by the power monitoring controller, a switch connected to the UPS so that first power output from a UPS provided in a first independent power generator that is normally operated, or first power output from a UPS provided in the second independent power generator is selected;when the switch is switched over, checking, by the power monitoring controller, whether the switch has completed a switchover operation; andreturning to the switching over the switch when the switchover operation of the switch has not yet been completed. 12. The power duplication control method of claim 11, further comprising, when the switchover operation of the switch has been completed at the checking whether the switch has completed the switchover operation: returning to the detecting the first power output from the UPS if the switchover operation has been completed. 13. The power duplication control method of claim 11, wherein: determining whether the first power falls within the normal range comprises an interrupt routine operation of periodically checking whether an SMPS is normally operated when determining whether the first power falls within a normal range;the interrupt routine operation of checking whether the SMPS is normally operated comprises:determining, by the power monitoring controller, whether second power output from the SMPS falls within a normal range matching a range of a preset second reference voltage;if the second power does not fall within the normal range, checking, by the power monitoring controller, whether a fault occurs in the SMPS;if it is checked that no fault occurs in the SMPS, checking, by the power monitoring controller, whether a fault occurs in a first HVDC controller or a second HVDC controller;if it is checked that a fault occurs in the SMPS or that a fault occurs in the first HVDC controller or the second HVDC controller, generating, by the power monitoring controller, an alarm; andwhen the alarm is generated, switching over, by the power monitoring controller, a switch to which the SMPS is connected or a switch to which the first HVDC controller and the second HVDC controller are connected so that the SMPS that is normally operated and the first HVDC controller or the second HVDC controller that is normally operated are selected. 14. The power duplication control method of claim 13, wherein checking whether the second power falls within a normal range matching the range of the preset second reference voltage comprises: performing an interrupt routine operation of periodically measuring a lifespan of a capacitor provided in the SMPS when the SMPS is normally operated,wherein the interrupt routine operation of measuring the lifespan of the capacitor comprises:measuring the lifespan of the capacitor by solving an equation of R=R0×2(T0-T1)/10%;checking whether R % is greater than X % preset in the power monitoring controller;when R % is greater than X %, generating, by the power monitoring controller, a lifespan alarm for the capacitor;checking, by the power monitoring controller, whether R % is greater than Y %, which is set to be greater than the X %; andreturning to the generating the lifespan alarm when R % is greater than Y %,wherein in the equation R=R0×2(T0-T1)/10%, R is a measured lifespan of the capacitor, R0 is a guaranteed product lifespan of the capacitor, and T1 is a time during which the capacitor C is used to date, and T0 is a warranty period for the capacitor. 15. The power duplication control method of claim 14, wherein measuring the lifespan of the capacitor is configured to measure the lifespan of the capacitor using equivalent series resistance characteristics indicating a degraded state of the capacitor. 16. The power duplication control method of claim 14, wherein at checking whether R % is greater than X %, X is set to 80 to 90% of R when R is 100%. 17. The power duplication control method of claim 14, wherein at checking whether R % is greater than Y %, Y is set to 90 to 98% of R when R is 100%.
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이 특허에 인용된 특허 (1)
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