WO2018198331A1 - 電力変換装置 - Google Patents
電力変換装置 Download PDFInfo
- Publication number
- WO2018198331A1 WO2018198331A1 PCT/JP2017/016982 JP2017016982W WO2018198331A1 WO 2018198331 A1 WO2018198331 A1 WO 2018198331A1 JP 2017016982 W JP2017016982 W JP 2017016982W WO 2018198331 A1 WO2018198331 A1 WO 2018198331A1
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- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- power supply
- input voltage
- threshold value
- power
- Prior art date
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Classifications
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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
-
- 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
-
- 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
-
- 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
Definitions
- the cell voltage Vcell is substantially equal to the DC voltage VDC of the capacitor 15.
- the cell voltage Vcell is substantially zero.
- the cell voltage Vcell is substantially zero.
- the cell voltage Vcell is substantially zero.
- the cell voltage Vcell is substantially equal to a voltage obtained by inverting the polarity of the DC voltage VDC of the capacitor 15.
- the switch operation circuit 44 is a circuit for operating the switch S7.
- the switch operation circuit 44 controls energization to the excitation coil 18 in accordance with a command from the control device 4. Since the current supply to the exciting coil 18 is stopped during normal operation, the switch S7 is turned off.
- the control device 4 is directed toward the unit converter 5 that has failed.
- the conduction command Son of the switch S7 is output.
- the I / F circuit 48 receives the conduction command Son and outputs it to the switch operation circuit 44.
- the switch operation circuit 44 supplies current to the exciting coil 18 in response to the conduction command Son, so that the switch S7 is turned on. Thereby, the output of the failed unit converter 5 is short-circuited.
- FIG. 3 is a circuit block diagram of the power supply 50 according to the first configuration example.
- power supply 50 includes a capacitor 51, a voltage sensor 52, a transistor S8, a resistor R5, a control unit 500a, and a power supply circuit 56.
- FIG. 4 is a diagram showing start and stop control of the power supply circuit 56 by the power supply 50 shown in FIG.
- FIG. 6 is a circuit block diagram showing the configuration of the power supply 50 according to the third configuration example.
- the configuration of the control unit 500b mainly the latch circuit 54 and the start / stop circuit 55b, is the first configuration shown in FIG. Different from the power supply 50 according to the example.
- the other configuration shown in FIG. 6 is the same as that of FIG. 3, and thus description thereof will not be repeated.
- the start / stop circuit 55b controls the start / stop of the power supply circuit 56 based on the detected value of the input voltage Vin by the voltage sensor 52 and the output signal of the latch circuit 54.
- the start / stop circuit 55b includes comparison circuits 551 and 552, logic circuits 553, 554, 555, and 558, and flip-flop (hereinafter also referred to as FF) circuits 556 and 557.
- FIG. 8A is a table showing the operation of the power supply 50 when the latch function is off.
- the counter 541 when the count value of the counter 541 of the latch circuit 54 is less than 3, that is, when the latch function is OFF, the counter 541 sends an L level signal to the logic circuit 553. , 554, 555.
- the output signal of the comparison circuit 551 becomes the output signal of the logic circuit 553 and becomes the input S to the FF circuits 556 and 557.
- the output signal of the logic circuit 555 that is, the input R to the FF circuit 557 is fixed to the L level. Therefore, inputs S and R of the FF circuit 556 are output signals of the comparison circuits 551 and 552, respectively.
- the output Q of the FF circuit 557 is H level when the output of the comparison circuit 551 is H level, and does not change when the output of the comparison circuit 551 is L level.
- the output signal of the comparison circuit 551 that is, the input S of the FF circuits 556 and 557 is at the L level.
- the output signal of the comparison circuit 552, that is, the input R of the FF circuit 556 is at the H level. Therefore, since the output Q of the FF circuits 556 and 557 is the L level and the output Q of the immediately preceding FF circuit 557, the output signal of the logic circuit 558 becomes the L level, and the power supply circuit 56 is stopped.
- the comparison circuit 531 of the overcharge suppression circuit 53 outputs an L level signal to the transistor S8, and the transistor S8 is turned off. Therefore, no current flows through the resistor R5, and the resistor R5 does not consume the power of the capacitor 51. Therefore, the input voltage Vin starts to increase due to the supply of power from the capacitor 15.
- the power consumed by the power supply circuit 56 is larger in the capacitor 51 than the power supplied from the capacitor 15, so that the input voltage Vin increases. It will only stop and descend.
- step S02 the start / stop circuit 55b of the controller 500b determines whether or not the input voltage Vin is equal to or higher than the threshold value V3. If the input voltage Vin is greater than or equal to the threshold value V3 in step S02 (YES in S02), the process proceeds to step S03, and the start / stop circuit 55b determines whether or not the latch function of the power supply circuit 56 is valid (the latch function is On or off). If the latch function is OFF in step S03 (NO in step S03), start / stop circuit 55b starts power supply circuit 56 in step S04.
- step S05 when input voltage Vin is larger than threshold value V2 (NO in S05), step S06 is skipped.
- step S07 the overcharge suppression circuit 53 of the controller 500b determines whether or not the input voltage Vin is equal to or higher than the threshold value V5.
- step S07 when input voltage Vin is equal to or higher than threshold value V5 (YES in step S07), overcharge suppression circuit 53 causes transistor S8 to be in a conducting state in step S08.
- steps S08 to S10 are skipped.
- the latch function that maintains the stopped state after the power supply circuit 56 is stopped is enabled.
- the latch function can be validated after the input voltage Vin to the power supply 50 becomes sufficiently high.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
制御装置4は、変流器C1~C3からの交流電流Iuv,Ivw,Iwuに基づいて、交流ラインUL,VL,WLに流れる交流電流に応じたレベルの三相交流電流Iu,Iv,Iwを求める。ただし、Iu=Iuv-Iwu、Iv=Ivw-Iuv、Iw=Iwu-Ivwである。
電源回路56が起動すると、入力電圧Vinが低下し始める。ただし、t22<t<t23(期間T3)では、V2<Vin<V3であるため、電源回路56は起動状態を維持する。
電源回路56が停止すると、入力電圧Vinは上昇に転じる。ただし、t23<t<t24(期間T4)では、V2<Vin<V3であるため、電源回路56は停止状態を維持する。
Claims (3)
- 少なくとも1つの単位変換器を直列接続して構成されたアームを備える電力変換器と、
前記電力変換器を制御する制御装置とを備え、
前記少なくとも1つの単位変換器は、
複数のスイッチング素子およびコンデンサを含み、前記複数のスイッチング素子を制御することにより前記コンデンサの電圧を交流電圧に変換する主回路と、
前記制御装置から受信した制御信号に従って前記複数のスイッチング素子を制御するように構成された制御回路と、
前記コンデンサの電圧を降圧して電源電圧を生成し、前記電源電圧を前記制御回路へ供給する電源とを含み、
前記電源は、
第1および第2の入力端子と、
前記第1および第2の入力端子間に前記コンデンサから与えられる入力電圧を検出する電圧センサと、
前記第1および第2の入力端子の間に、電気的に直列に接続されるスイッチおよび抵抗と、
前記第1および第2の入力端子の間に電気的に接続され、前記入力電圧を前記電源電圧に変換するように構成された電源回路と、
制御部とを有し、
前記制御部は、
前記入力電圧が第1の閾値以上となったときに、前記電源回路を起動し、
前記入力電圧が前記第1の閾値より高い第2の閾値以上となったときに、前記スイッチを導通状態にし、
前記スイッチが導通状態である場合に、前記入力電圧が、前記第1の閾値より高く前記第2の閾値より低い第3の閾値以下となったときに、前記スイッチを非導通状態にし、
前記入力電圧が前記第1の閾値より低い第4の閾値以下となったときに、前記電源回路を停止するように構成され、
前記制御部はさらに、前記電源回路の起動後に前記入力電圧が前記第2の閾値以上となった回数に基づいて、前記電源回路を停止した状態で保持するラッチ機能を有効にするように構成される、電力変換装置。 - 前記制御部は、
前記ラッチ機能が有効である場合、前記入力電圧が前記第4の閾値よりさらに低い第5の閾値以下となったときに、前記ラッチ機能を解除するように構成される、請求項1に記載の電力変換装置。 - 前記制御部は、前記入力電圧が前記第2の閾値以上になった回数が2以上の所定の回数に達したときに、前記ラッチ機能を有効にする、請求項1または2に記載の電力変換装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP17907461.2A EP3618257B8 (en) | 2017-04-28 | 2017-04-28 | Power conversion device |
PCT/JP2017/016982 WO2018198331A1 (ja) | 2017-04-28 | 2017-04-28 | 電力変換装置 |
JP2019515033A JP6687812B2 (ja) | 2017-04-28 | 2017-04-28 | 電力変換装置 |
US16/605,844 US10958189B2 (en) | 2017-04-28 | 2017-04-28 | Power conversion device |
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PCT/JP2017/016982 WO2018198331A1 (ja) | 2017-04-28 | 2017-04-28 | 電力変換装置 |
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US (1) | US10958189B2 (ja) |
EP (1) | EP3618257B8 (ja) |
JP (1) | JP6687812B2 (ja) |
WO (1) | WO2018198331A1 (ja) |
Cited By (2)
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WO2021028976A1 (ja) * | 2019-08-09 | 2021-02-18 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
WO2021028975A1 (ja) * | 2019-08-09 | 2021-02-18 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
Families Citing this family (2)
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GB201719569D0 (en) | 2017-11-24 | 2018-01-10 | Samsung Electronics Co Ltd | Resource element offsetting in a telecommunication system |
WO2021249657A1 (en) * | 2020-06-12 | 2021-12-16 | Hitachi Energy Switzerland Ag | A cell comprising a crowbar branch with a resistive element |
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- 2017-04-28 WO PCT/JP2017/016982 patent/WO2018198331A1/ja active Application Filing
- 2017-04-28 EP EP17907461.2A patent/EP3618257B8/en active Active
- 2017-04-28 JP JP2019515033A patent/JP6687812B2/ja active Active
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WO2007025828A1 (de) | 2005-08-30 | 2007-03-08 | Siemens Aktiengesellschaft | Stromrichterschaltung mit verteilten energiespeichern |
JP2011193615A (ja) * | 2010-03-15 | 2011-09-29 | Hitachi Ltd | 電力変換装置 |
JP2013121282A (ja) * | 2011-12-08 | 2013-06-17 | Toshiba Mitsubishi-Electric Industrial System Corp | 電力変換装置用部品 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021028976A1 (ja) * | 2019-08-09 | 2021-02-18 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
WO2021028975A1 (ja) * | 2019-08-09 | 2021-02-18 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
JP6886072B1 (ja) * | 2019-08-09 | 2021-06-16 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
JPWO2021028975A1 (ja) * | 2019-08-09 | 2021-09-27 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
JP7023986B2 (ja) | 2019-08-09 | 2022-02-22 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
EP4012916A4 (en) * | 2019-08-09 | 2023-04-12 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | POWER CONVERSION DEVICE |
EP4012913A4 (en) * | 2019-08-09 | 2023-04-12 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | POWER CONVERSION DEVICE |
US11716008B2 (en) | 2019-08-09 | 2023-08-01 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion device |
US11722050B2 (en) | 2019-08-09 | 2023-08-08 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Current limiting circuit for multilevel power converter cell |
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Publication number | Publication date |
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JPWO2018198331A1 (ja) | 2019-12-19 |
EP3618257A1 (en) | 2020-03-04 |
US20210058006A1 (en) | 2021-02-25 |
EP3618257B1 (en) | 2022-09-07 |
US10958189B2 (en) | 2021-03-23 |
EP3618257B8 (en) | 2022-10-12 |
EP3618257A4 (en) | 2020-11-25 |
JP6687812B2 (ja) | 2020-04-28 |
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