WO2016208894A1 - Mmc 컨버터의 서브모듈용 전원공급장치 - Google Patents
Mmc 컨버터의 서브모듈용 전원공급장치 Download PDFInfo
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- WO2016208894A1 WO2016208894A1 PCT/KR2016/006219 KR2016006219W WO2016208894A1 WO 2016208894 A1 WO2016208894 A1 WO 2016208894A1 KR 2016006219 W KR2016006219 W KR 2016006219W WO 2016208894 A1 WO2016208894 A1 WO 2016208894A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/084—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Definitions
- the present invention relates to a power supply device, and more particularly, to a sub-module of an MMC converter that stably supplies power to a sub-module of a modular multi-level converter (MMC) linked to a high-voltage direct current transmission (HVDC) system. It relates to a power supply for the.
- MMC modular multi-level converter
- HVDC high-voltage direct current transmission
- a high voltage direct current (HVDC) system converts AC power produced in a power plant into DC to transmit power and re-converts to AC at a power receiving end to supply power to a load.
- This HVDC system is capable of efficient and economical power transmission through voltage boost, heterogeneous system linkage, and long distance high efficiency transmission.
- HVDC systems incorporate a Modular Multilevel Converter (MMC) converter for power transmission and reactive power compensation.
- MMC Modular Multilevel Converter
- Such an MMC converter includes a plurality of sub-modules connected in series with each other. Sub-modules are very important elements in MMC converters and a power supply is required to supply stable power to the sub-modules in various environments.
- FIG. 1 is an equivalent circuit diagram of an MMC converter
- FIG. 2 is a circuit diagram of a power supply device for a submodule of a conventional MMC converter.
- the MMC converter is composed of one or more phase modules 1, and each of the phase modules 1 is connected with a plurality of sub-modules 10 in series.
- each phase module 1 connects the DC voltage side to the positive (+) and negative (-) DC voltage bus lines P and N, respectively.
- the input voltage of the P-N bus is input to the submodule 10 through the connection terminals X1 and X2.
- the power supply device 20 for the submodule of the MMC converter converts the high voltage (about 2-3 mA) of the PN bus bar into a low voltage (about 5-100 V) to supply the power required for the operation of the submodule. do.
- the conventional power supply device 20 stores the Vdc voltage in the capacitor 21 while the input voltage of the P-N bus of the MMC converter increases from 0V to a high voltage (for example, 3 kV).
- the controller 24 While the clamping voltage Vzd of the zener diode (ZD) 23 is output to the controller 24 while the Vdc voltage, which is the input voltage of the PN bus line, increases from 0V to 1000V, the controller 24 receives the semiconductor switch ( 25 is turned on to allow current to be supplied to the transformer 26. As such, when the secondary output voltage Pcon of the transformer 26 is applied to the controller 24, the controller 24 drives the power supply device 20.
- the power supply device 20 starts but does not produce a normal output due to a low input voltage at an initial stage and stops. This start and stop is repeated while the input voltage is rising, and the repetition is stopped only when the input voltage reaches the rated voltage.
- the secondary output voltage Pcon of the transformer 26 takes charge of the power of the controller 24.
- the power supply device 20 is started even when the input voltage is lower than the rated voltage at the initial startup, there is a problem that the normal startup does not occur and the input voltage continues to rise so that the resistance 22 and The current continues to flow to the zener diode 23, so that heat generation occurs in these devices 22 and 23, which causes a problem of continuous loss.
- An object of the present invention is to provide a power supply device for a sub-module of the MMC converter capable of adjusting the starting time for the power supply device to start the sub-module of the MMC converter associated with the HVDC system.
- the present invention provides a power supply device for the sub-module of the MMC converter to remove heat and loss in the internal device even when the input voltage reaches the high voltage region in the power supply device for the sub-module of the MMC converter.
- a power supply device for the sub-module of the MMC converter to remove heat and loss in the internal device even when the input voltage reaches the high voltage region in the power supply device for the sub-module of the MMC converter.
- the present invention is to protect the internal components by blocking the circuit even if overcurrent flows or overheating occurs in the power supply due to a short circuit in the secondary load voltage output terminal of the transformer in the power supply for the sub-module of the MMC converter
- Another object is to provide a power supply for a submodule of an MMC converter.
- a power supply for supplying power to a sub module of an MMC converter comprising: a relay unit installed between the P-N bus lines of the MMC converter and including a B contact switch; A resistor connected in series with the relay unit; A TVS diode connected in series with said resistor; A zener diode connected in series with the TVS diode; A transformer for transferring the input voltage (primary side) of the P-N bus to the secondary side; A semiconductor switch for switching the flow of current supplied to the transformer; A control unit which turns on the semiconductor switch so that a current is conducted to the transformer when a clamping voltage of the zener diode is input; A relay driver for receiving a secondary output voltage of the transformer to drive a B-contact switch of the relay unit; And a circuit breaker connected in series with the relay unit and blocking the circuit when the current flowing through the B contact switch of the relay unit is greater than a predetermined reference current or heat is generated by the current.
- the input voltage is increased from 0V to a predetermined maximum voltage (Vmax).
- the relay unit is supplied with the TVS diode through the B contact switch before the initial state of the B contact switch is set to a short circuit and the input voltage increases to reach the rated voltage for starting the power supply.
- the supply current is not conducted so that no current flows to the control unit.
- the TVS diode when the input voltage increases to reach the rated voltage, the TVS diode conducts the supply current to be supplied to the controller, and the controller turns on the semiconductor switch when the supply current is applied. .
- the transformer transfers the primary side voltage to the secondary side and outputs the secondary side voltage and the relay switching unit is The B contact switch of the relay unit is opened by receiving the secondary power voltage of the transformer.
- the control unit operates by receiving the output voltage of the secondary side of the transformer as an operating power source without the clamping voltage of the zener diode being input.
- the circuit breaker includes at least one of a current fuse that cuts off the circuit when a current equal to or greater than a predetermined reference current flows, or a thermal fuse that cuts off the circuit when heated to a predetermined reference temperature by the current.
- the thermal fuse includes a nonflammable and flame retardant resistance material.
- the thermal fuse is integrated with the resistor R.
- the circuit breaker is provided between the TVS diode (TD) and the branch circuit to the controller or between the resistor (R) and the TVS diode (TD).
- the semiconductor switch after the semiconductor switch is turned on (on) it is repeated on / off by a predetermined period by the controller.
- the starting time of the power supply device can be adjusted according to the magnitude of the input voltage.
- the loss in the resistor and the zener diode can be eliminated.
- a short circuit occurs in the output side of the secondary load voltage of the transformer in the power supply, so that the circuit breaker shuts down the circuit even if overcurrent flows or overheats due to the application of high voltage. Can be prevented.
- FIG. 2 is a circuit diagram of a power supply for a sub module of a conventional MMC converter
- FIG. 3 is a circuit diagram of a power supply device for a sub module of an MMC converter according to an embodiment of the present invention
- 4 to 8 is a schematic diagram of the current flow according to the driving of the power supply for the sub-module of the MMC converter according to the present invention.
- first, second, A, B, (a), and (b) may be used. These terms are only to distinguish the components from other components, and the nature, order, order, etc. of the components are not limited by the terms. If a component is described as being “connected”, “coupled” or “connected” to another component, that component may be directly connected or connected to that other component, but there may be another component between each component. It will be understood that may be “connected”, “coupled” or “connected”.
- FIG. 3 is a circuit diagram of a power supply for a sub-module of the MMC converter according to an embodiment of the present invention.
- a power supply device 100 for a sub-module of an MMC converter may include an MMC converter including one or more phase modules. Apply. Specifically, power is supplied to a plurality of submodules constituting the upper module of the MMC converter. To this end, the power supply device 100 receives high voltages between the positive and negative P buses and the N buses to which each phase module is connected and starts and supplies the necessary voltages to the submodules when the output is normal. do.
- the charging unit 110 the relay unit 120, the resistor 130, the TVS diode (TD) 140, the zener diode (ZD) 150, and the transformer 160.
- a semiconductor switch 170 a controller 180, a relay switching unit 190, and a circuit breaker 200.
- the charging unit 110 stores the input voltage of the P-N bus line of the MMC converter.
- the input voltage is stored in the charging unit 110 while the input voltage between the P-N bus lines of the MMC converter increases from 0V to a preset maximum voltage Vmax.
- the charging unit 110 may include, for example, a capacitor.
- the relay unit 120 is connected to the charging unit 110 in parallel.
- the relay unit 120 includes a B contact switch in which an initial state of the contact is formed in a short circuit. Therefore, since the B contact switch is initially in a closed state, it is turned on when a current is applied. When a voltage is applied to the relay unit 120 so that the relay unit 120 operates, the B contact switch is opened and the current is cut off.
- the resistor 130, the TVS diode 140, and the zener diode 150 are connected in series with the relay unit 120.
- the resistor 130, the TVS diode 140, and the control diode 150 are preferably connected in series to the relay unit 120, but the present invention is not limited thereto.
- the TVS diode 140 serves as a transient voltage suppressor diode to conduct current only above a predetermined voltage.
- the zener diode 150 allows a constant clamping voltage to be supplied to the controller 180.
- the transformer 160 transfers the primary side voltage to the secondary side using the input voltage of the P-N bus as the primary side voltage.
- the transformer 160 converts the high voltage of the P-N bus into a low voltage required for the secondary load (eg, a sub module) according to the internal winding ratio.
- the output voltage of the secondary load voltage output terminal of the transformer 160 is input to the relay switching unit 180.
- the secondary output voltage of the transformer 160 is input to the controller 190.
- the load side output voltage input to the relay switching unit 180 and the secondary side output voltage input to the controller 190 may be the same or different.
- the load side output voltage is a load voltage for driving a load (eg, a sub module) and the secondary output voltage input to the controller 190 is a voltage for driving the controller 190.
- the secondary coils of the transformer 160 may be divided into two, and the secondary coils may be formed at different turns ratios to implement different output voltages.
- the semiconductor switch 170 switches the current flow so that the current by the input voltage of the P-N bus is supplied to the transformer 160.
- the switching operation of the semiconductor switch 170 is controlled by the controller 180 to be described later.
- the semiconductor switch 170 When the semiconductor switch 170 is turned on, current by the input voltage charged in the charging unit 110 flows through the closed circuit formed through the transformer 160 and the semiconductor switch 170, and the transformer 160 is 1 at this time. Transfer the voltage across the secondary to the secondary.
- the semiconductor switch 170 according to the embodiment of the present invention is a power semiconductor device capable of turn-on / turn-off control, and may be preferably implemented by, for example, IGBT, IGCT, GTO, MOSFET, or the like. have.
- the controller 180 initially turns on the semiconductor switch 170 when the supply contact is applied in the short-circuit state of the B-contact switch so that the supply current is conducted through the semiconductor switch 170. That is, since the semiconductor switch 170 is turned on, a closed circuit is formed through the semiconductor switch 170 so that the supply current by the input voltage is supplied to the transformer 160. By the current flow, the input voltage of Vdc stored in the charging unit 110 is supplied to the primary side of the transformer 160, and the transformer 160 converts the low voltage according to the turns ratio and outputs it as the secondary side voltage. The secondary output voltage is input to the controller 180 and used as the operating power of the power supply device 100. At this time, in the present embodiment, the controller 180 controls the semiconductor switch 170 to be turned off and on repeatedly according to a predetermined cycle after the semiconductor switch 170 is turned on. That is, the semiconductor switch 170 is turned on / off at a very short frequency.
- the relay switching unit 190 operates the relay unit 120 by receiving the load voltage output voltage output to the load on the secondary side of the transformer 160 as described above. Specifically, when the secondary output voltage of the transformer 160 is input to the relay switching unit 190, the B contact switch initially set in the short circuit state to the relay unit 120 is switched to the open state. As a result, the current flowing through the relay unit 120 is blocked, so that the current is no longer supplied to the controller 180. As described above, after the relay switching unit 190 switches the B contact switch to open, the controller 180 receives only the secondary output voltage of the transformer 160 and supplies the output voltage to the power supply device 100. It is used as the operating power of.
- the input voltage of the high voltage applied between the PN buses of the MMC converter is stored in the charging unit 110, and the Vdc input voltage stored in the charging unit 110 is stored in the primary voltage of the transformer 160.
- the power supply device 100 of the present invention to remove the unnecessary switching operation and minimize the loss by allowing the power supply device 100 to start only at the initial voltage, that is, the rated voltage or more.
- the power supply device 100 of the present invention increases the input voltage of the PN bus line from 0V to the preset maximum voltage Vmax, until the power supply device 100 reaches the rated voltage for starting, the TVS The diode 140 cuts off the current so that the current is not supplied to the control unit 180 so that the power supply device 100 does not start, and after reaching the rated voltage, the TVS diode 140 conducts current to supply power.
- the feeder 100 is started.
- the circuit breaker 200 is connected in series to the relay unit 120 in a series circuit connected to the relay unit 120, and a current flowing through the B contact switch of the relay unit 120 is greater than or equal to a preset reference current. If heat is generated by the circuit breaker. That is, in the normal operation state, when the current flows over the reference current through the B contact switch of the relay unit 120 or the heat generation occurs over the predetermined temperature by the current even though the reference current is below the current, the circuit is cut off.
- the relay switching unit 190 switches the B contact switch initially set to the short circuit state of the relay unit 120. By switching to the open state, the current flowing through the relay unit 120 is cut off.
- the secondary load output voltage of the transformer 160 input to the relay switching unit 190 becomes 0V and thus the relay switching unit 190 Since the voltage is not supplied to the B contact switch of the relay unit 120 is switched from the open state to the short state.
- the circuit breaker 200 is connected in series with the relay unit 120 so that a current higher than a predetermined reference current flows through the relay unit 120 or heat is generated at the reference temperature by the current. Blocking to protect the power supply (100). Accordingly, the circuit breaker 200 may be configured as a current fuse that cuts off the circuit when an overcurrent exceeding a preset current size flows, or may be configured as a temperature fuse that cuts off the circuit when heat is generated at a predetermined temperature. .
- thermal fuses may be made of non-flammable and flame-retardant resistive materials that can withstand high temperatures.
- the thermal fuse may be formed of a non-flammable metal oxide film resistor (MOR) or a non-flammable wire wound resistor (RW) to prevent the fuse from being blown at high temperatures.
- MOR non-flammable metal oxide film resistor
- RW non-flammable wire wound resistor
- the current fuse and the temperature fuse may be used at the same time. This allows the current fuse to operate in a similar time, but for the thermal fuse to operate when the operation of the current fuse is delayed or fails depending on the magnitude of the current by the input voltage.
- the circuit breaker 200 connected in series to the relay unit 120 is installed to open the circuit when an overcurrent is applied or heat is generated by the current.
- the circuit breaker 200 is connected to the relay unit 120 in series, but installed anywhere below the relay unit 120, that is, between the relay unit 120 and the zener diode 150. Is possible. In FIG.
- the circuit breaker 200 when the circuit breaker 200 is implemented as a thermal fuse, the circuit breaker 200 may be integrated with the resistor R.
- 4 to 7 are exemplary diagrams of the current flow according to the driving of the power supply for the sub-module of the MMC converter according to an embodiment of the present invention.
- the input voltage of the P-N bus bar starts to increase from 0V, and this input voltage is stored in the charging unit 110.
- the supply current flows through the relay unit 120 through the resistor 130 to the TVS diode 140 by the input voltage.
- the TVS diode 140 conducts current only when a predetermined voltage or more is applied, in this embodiment, the input voltage is rated by setting the current to be conducted only above the rated voltage for starting the power supply device 100. In the low voltage region lower than the voltage, the TVS diode 140 does not conduct current. Since no current flows to the zener diode 150 in FIG.
- the power supply device 100 does not start. That is, the power supply device 100 does not start until the input voltage increases from 0V to reach the predetermined rated voltage.
- the TVS diode 140 conducts current to control the controller 180 through a branch circuit. Is applied.
- the controller 180 turns on the semiconductor switch 170 when such a current is applied.
- FIG. 6 illustrates an example in which the semiconductor switch 170 is turned on so that a current flows through the transformer 160.
- the power supply device 100 is activated and the transformer 160 transmits the voltage applied to the primary side to the secondary side.
- the voltage converted by the turns ratio is output to the secondary side of the transformer 160.
- This secondary voltage is provided to the controller 180 and the relay switching unit 190.
- the secondary voltages supplied to the controller 180 and the relay switching unit 190 may be the same or different. If different, it is preferable to implement the output voltage differently by configuring two windings with different secondary windings.
- the secondary voltage supplied to the controller 180 is used as an operating power source of the controller 180, and the secondary load voltage supplied to the relay switching unit 190 is used to operate the relay switching unit 190.
- the relay switching unit 190 switches the B contact switch of the relay unit 120 to open.
- the current flow in the state in which the B contact switch of the relay unit 120 is opened is illustrated. Since the current is cut off in the relay unit 120 in the state where the B contact switch is open, no current is applied to the controller 180 anymore, and as shown in FIG. 6, only the secondary output voltage of the transformer 160 is controlled. It is supplied to the controller 180 as an operating voltage of 180. As such, the controller 180 continues to operate the power supply device 100 using the operating voltage.
- FIG. 8 illustrates an example in which a short occurs at the secondary load voltage output terminal of the transformer 160.
- the voltage supply is cut off to the relay switching unit 190, so that the B contact switch of the relay unit 120 is in a short circuit state. Is switched to.
- the input voltage of the P-N bus is applied through the B contact switch. Since the input voltage is a high voltage, the overcurrent caused by the high voltage flows through the B contact switch.
- the circuit breaker 200 is opened to block the flow of overcurrent. do.
- the circuit breaker 200 is implemented as a current fuse or a temperature fuse
- the fuse is blown by an overcurrent or a heat to make the circuit open. Therefore, it is possible to prevent the overcurrent caused by the high voltage of the input terminal from being supplied to the controller 180.
- FIG. 8 illustrates an example in which the fuse is blown when the circuit breaker 200 is implemented as a fuse.
- the current fuse When the fuse is blown, the current fuse is blown due to an overcurrent caused by a high voltage or a heat is generated by the current, and when the heat reaches a predetermined threshold temperature of the thermal fuse, the thermal fuse is blown to cut off the circuit. do.
- the power supply device 100 starts only when the input voltage is equal to or higher than the rated voltage for starting the power supply device 100.
- the power supply device 100 starts to generate a normal output, only the output voltage is used as the operating power source.
- the unnecessary operation of repeating the start and stop of the power supply device 100 is eliminated as in the related art, and it is possible to greatly reduce heat generation and loss in the resistance and the zener diode.
- the power supply device 100 when a short circuit occurs in the secondary output terminal of the transformer 160, when the overcurrent or overheating occurs in order to prevent the overcurrent flows to cause a failure of the internal components To install the circuit block 200 to cut off. As a result, even if a short circuit occurs in the secondary output terminal of the transformer 160, the power supply device 100 may be protected.
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Abstract
Description
Claims (12)
- MMC 컨버터의 서브모듈에 전원을 공급하는 전원공급장치에 있어서,상기 MMC 컨버터의 P-N 모선 사이에 설치되며 B접점 스위치를 포함하는 릴레이부;상기 릴레이부에 직렬연결된 저항(R);상기 저항(R)에 직렬연결된 TVS 다이오드(TD);상기 TVS 다이오드(TD)에 직렬연결된 제너다이오드(ZD);상기 P-N 모선의 입력전압(1차측)을 2차측으로 전달하는 트랜스포머;상기 트랜스포머로 공급되는 전류의 흐름을 스위칭하는 반도체스위치;상기 제너다이오드(ZD)의 클램핑 전압이 입력되면 상기 트랜스포머로 전류가 도통되도록 상기 반도체스위치를 온(on)시키는 제어부;상기 트랜스포머의 2차측 출력전압을 입력받아 상기 릴레이부의 B접점 스위치를 구동시키는 릴레이구동부; 및상기 릴레이부에 직렬연결되며 상기 릴레이부의 B접점 스위치를 통해 흐르는 전류가 기설정된 기준전류보다 크거나 상기 전류에 의해 발열이 발생하는 경우 회로를 차단하는 회로차단부; 를 포함하는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제1항에 있어서, 상기 입력전압은 0V부터 기설정된 최대전압(Vmax)까지 증가함을 특징으로 하는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제2항에 있어서, 상기 릴레이부는 상기 B접점 스위치의 초기상태가 단락으로 설정되고 상기 입력전압이 증가하여 상기 전원공급장치의 기동을 위한 정격전압에 도달하기 전에는 상기 TVS 다이오드가 상기 B접점 스위치를 통해 공급된 공급전류를 도통시키지 않아 상기 제어부로 전류가 흐르지 않도록 하는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제3항에 있어서, 상기 입력전압이 증가하여 상기 정격전압에 도달하면 상기 TVS 다이오드는 상기 공급전류를 도통시켜 상기 제어부로 공급되도록 하고 상기 제어부는 상기 공급전류가 인가되면 상기 반도체스위치를 온(on)시키는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제4항에 있어서, 상기 반도체스위치가 온(on)되면 상기 공급전류에 의해 상기 트랜스포머에 1차측 전압을 공급하고 상기 트랜스포머는 1차측 전압을 2차측으로 전달하여 2차측 전압으로 출력하며 상기 릴레이스위칭부는 상기 트랜스포머의 2차측 전력전압을 입력받아 상기 릴레이부의 B접점 스위치를 오픈(open)시키는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제5항에 있어서, 상기 릴레이부의 B접점 스위치가 오픈된 후 상기 제어부는 상기 제너다이오드의 클램핑 전압은 입력되지 않고 상기 트랜스포머의 2차측 출력전압을 동작전원으로 입력받아 동작하는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제1항에 있어서, 상기 회로차단부는 정상운전 상태에서 상기 트랜스포머의 2차측에 단락 발생으로 인해 상기 릴레이부의 B접점 스위치가 단락상태로 변환된 경우 상기 B접점 스위치를 통해 상기 기설정된 전류보다 큰 과전류가 흐르면 회로를 차단하는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제1항에 있어서, 상기 회로차단부는 기설정된 기준전류 이상의 전류가 흐르면 회로를 차단하는 전류 퓨즈 또는 상기 전류에 의해 기설정된 기준온도로 발열되면 회로를 차단하는 온도 퓨즈 중 적어도 하나를 포함하는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제8항에 있어서, 상기 온도 퓨즈는 불연성 및 난연성 저항재료를 포함하는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제8항에 있어서, 상기 온도 퓨즈는 상기 저항(R)과 일체형으로 구현되는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제1항에 있어서, 상기 회로차단부는 상기 TVS 다이오드(TD) 및 제어부로의 분기회로 사이 또는 상기 저항(R) 및 TVS 다이오드(TD) 사이에 설치되는 MMC 컨버터의 서브모듈용 전원공급장치.
- 제1항에 있어서, 상기 반도체스위치는 온(on)된 이후에 상기 제어부에 의해 기설정된 주기로 온/오프를 반복하는 MMC 컨버터의 서브모듈용 전원공급장치.
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BR112017027960-6A BR112017027960A2 (pt) | 2015-06-22 | 2016-06-10 | Aparelho de fonte de alimentação para sub- módulos de um mmc (conversor modular multinível) |
US15/738,758 US10305394B2 (en) | 2015-06-22 | 2016-06-10 | Apparatus for supplying power to sub-module of MMC |
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KR1020150088178A KR101731478B1 (ko) | 2015-06-22 | 2015-06-22 | Mmc 컨버터의 서브모듈용 전원공급장치 |
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EP3367529A1 (de) * | 2017-02-13 | 2018-08-29 | Siemens Aktiengesellschaft | Versorgungseinrichtung für ein elektrisches modul mit sicherungselement |
CN111800028A (zh) * | 2020-07-14 | 2020-10-20 | 湘潭大学 | 一种新型铁路牵引供电系统功率波动与环流抑制的方法 |
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KR101731477B1 (ko) * | 2014-12-29 | 2017-04-28 | 주식회사 효성 | Mmc 컨버터의 서브모듈용 전원공급장치 |
KR102040221B1 (ko) * | 2017-12-20 | 2019-11-04 | 엘지전자 주식회사 | 간섭 소음 제거 및 출력 제어 기능이 개선된 유도 가열 장치 |
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US10305394B2 (en) | 2019-05-28 |
KR20160150348A (ko) | 2016-12-30 |
US20180183353A1 (en) | 2018-06-28 |
KR101731478B1 (ko) | 2017-04-28 |
BR112017027960A2 (pt) | 2018-08-28 |
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