GB2607818A - Assembly with crowbars and decoupling impedances - Google Patents

Assembly with crowbars and decoupling impedances Download PDF

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Publication number
GB2607818A
GB2607818A GB2212774.0A GB202212774A GB2607818A GB 2607818 A GB2607818 A GB 2607818A GB 202212774 A GB202212774 A GB 202212774A GB 2607818 A GB2607818 A GB 2607818A
Authority
GB
United Kingdom
Prior art keywords
assembly
terminal
switches
series connection
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB2212774.0A
Other versions
GB202212774D0 (en
Inventor
Mohanaveeramani Aravind
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Energy Ltd
Original Assignee
Hitachi Energy Switzerland AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Energy Switzerland AG filed Critical Hitachi Energy Switzerland AG
Publication of GB202212774D0 publication Critical patent/GB202212774D0/en
Publication of GB2607818A publication Critical patent/GB2607818A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock

Abstract

An assembly comprises a first connection terminal (AC1), a second connection terminal (AC2) and at least two circuit arrangements, each circuit arrangement comprising a first series connection of two switches (T1A, T1B; T2A, T2B; T3A, T3B) and a capacitor (CA; CB; CC) having a first end with a first electrical terminal (TEC1A; TEC1B; TEC1C) and a second end with a second electrical terminal (TEC2A; TEC2B; TEC2C); where a first terminal (TES1A; TES1B; TES1C) of the first series connection is connected with the first electrical terminal (TEC1A; TEC1B; TEC1C) and a second terminal (TES2A; TES2B; TES2C) of the first series connection is connected with the second electrical terminal (TEC2A; TEC2B; TEC2C). A parallel branch is electrically connected between the first and second electrical terminals (TEC1A, TEC2A; TEC1B, TEC2B; TEC1C, TEC2C) and comprises a switching element (CBA; CBB; CBC). An impedance (ZAC, ZAB, ZBC) is connected between the electrical terminals (TEC1A, TEC1B, TEC1C) at one end of the capacitors (CA, CB, CC).

Claims (15)

Claims
1. An assembly for a voltage source converter, the assembly comprising a first assembly connection terminal (AC1), a second assembly connection terminal (AC2) and at least two circuit arrangements, wherein each of the at least two circuit arrangements comprises: a first series connection of two switches (T1A, TIB; T2A, T2B; T3A, T3B) and a capacitor (CA; CB; CC) having a first end with a first electrical terminal (TEC1A; TEC1B; TEC 1C) and a second end with a second electrical terminal (TEC2A; TEC2B; TEC2C); wherein a first terminal (TES1A; TES1B; TES1C) of the first series connection of the two switches (T1A, TIB; T2A, T2B; T3A, T3B) is connected with the first electrical terminal (TEC1A; TEC1B; TEC1C) of the capacitor (CA; CB; CC) and a second terminal (TES2A; TES2B; TES2C) of the first series connection of switches (CA; CB; CC) is connected with the second electrical terminal (TEC2A; TEC2B; TEC2C) of the capacitor (CA; CB; CC), the assembly further comprising a parallel branch electrically connected between the first and second terminals (TEC1A, TEC2A; TEC IB, TEC2B; TEC1C, TEC2C) of the capacitor (CA; CB; CC), the parallel branch comprising a switching element (CBA; CBB; CBC) adapted to be externally activated to short-circuit the capacitor and dissipate energy stored in the capacitor (CA; CB; CC), and wherein in the assembly an impedance (ZAC, ZAB, ZBC) with a magnitude of a complex resistance greater than zero is connected between the electrical terminals (TEC1A, TEC1B, TEC1C) at one end of the capacitors (CA, CB, CC).
2. The assembly of claim 1, wherein the impedances (ZAC, ZAB, ZBC) connected between the first electrical terminals (TEC1A, TEC1B, TEC1C) of the capacitors (CA, CB, CC) are from the group resistors, capacitors, inductors or a combination thereof.
3. The assembly of any of claims 1 and 2, wherein the switching element (CBA; CBB; CBC) of the parallel branch, which is adapted to be externally activated to short-circuit the capacitor (CA; CB; CC), is a semiconductor.
4. The assembly of claim 3, wherein each switching element (CBA, CBB, CBC) of the bypass branch in the circuit arrangements has a dedicated driver (14A, 14B, 14C; 14), adapted to activate the switching element simultaneously or independently from each other.
5. The assembly of any previous claim, wherein the parallel branch comprises a further impedance (ZA, ZB, ZC).
6. The assembly of any of claims 1 to 5, wherein the switches (T1 A, T2A) in the first series circuit of two switches are configured to be controlled by a first control unit (CUA).
7. The assembly according to any previous claim, further comprising a bypass switch (BPS) connected between the assembly connection terminals (AC1, AC2).
8. The assembly according to any previous claim, wherein the midpoints of each first series connection of two switches are interconnected and forms the first assembly connection terminal (AC1) and either the first terminal (TES1 A; TES1B; TES1C) of the first series connection of the two switches (T1 A, TIB; T2A, T2B; T3A, T3B) or the second terminal (TES2A; TES2B; TES2C) of the first series connection of switches (CA; CB; CC) are interconnected and forms the second assembly connection terminal (AC2).
9. The assembly according to any of claims 1 - 7, wherein each circuit arrangement comprises a second series connection of two switches (T3 A, T4A, T3B, T4B, T3C, T4C), wherein a first terminal (TES3A, TES3B, TES3C) of the second series connection of two switches (T3A, T4A, T3B, T4B, T3C, T4C) is connected with the first electrical terminal (TEC1 A, TEC IB, TEC 1C) of the capacitor (CA, CB, CC) and a second terminal (switches (TES4A, TES4B, TES4C) of the second series connection of switches (T3A, T4A, T3B, T4B, T3C, T4C) is connected with the second electrical terminal (TEC2A, TEC2B, TEC2C) of the capacitor (CC, CB, CC).
10. The assembly of claim 9, wherein the midpoints of each first series connection of two switches are interconnected and forms the first assembly connection terminal (AC1) and the midpoints of each second series connection of two switches are interconnected and forms the second assembly connection terminal (AC2).
11. The assembly according to claim 9 or 10, wherein an impedance (Z2AC, Z2AB, Z2BC) with a magnitude of a complex resistance greater than zero is connected between the electrical terminals (TEC2A, TEC2B, TEC2C) at the other end of the capacitors (CA, CB, CC).
12. The assembly according to any of claims 1 - 10, wherein in relation to the electrical terminals at said one end of the capacitors (CA, CB, CC) between which an impedance is connected, the electrical terminals (TEC2A, TEC2B, TEC2C) at the other end of the capacitors (CA, CB, CC) are electrically interconnected.
13. The assembly according to any previous claim, being configured to form a voltage source converter.
14. A cell for a modular multilevel converter, said cell being realized as an assembly according to any of claims 1 - 12.
15. A modular multilevel converter comprising cells, wherein at least one cell is a cell according to claim 14.
GB2212774.0A 2020-03-05 2020-03-05 Assembly with crowbars and decoupling impedances Pending GB2607818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/055879 WO2021175428A1 (en) 2020-03-05 2020-03-05 Assembly with crowbars and decoupling impedances

Publications (2)

Publication Number Publication Date
GB202212774D0 GB202212774D0 (en) 2022-10-19
GB2607818A true GB2607818A (en) 2022-12-14

Family

ID=69780188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2212774.0A Pending GB2607818A (en) 2020-03-05 2020-03-05 Assembly with crowbars and decoupling impedances

Country Status (2)

Country Link
GB (1) GB2607818A (en)
WO (1) WO2021175428A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100034001A1 (en) * 2006-12-21 2010-02-11 Siemens Aktiengesellschaft Converter with Short-Circuit Current Limiting
US20140226373A1 (en) * 2013-02-13 2014-08-14 Korea Electrotechnology Research Institute Method for Suppressing Circulating Current in Modular Multilevel Converter for High Voltage Direct-Current Transmission
EP3036823A1 (en) * 2013-09-26 2016-06-29 Siemens Aktiengesellschaft Multilevel inverter
EP3614543A1 (en) * 2018-08-20 2020-02-26 General Electric Technology GmbH Switching valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015222280A1 (en) 2015-11-12 2017-05-18 Siemens Aktiengesellschaft Modular multi-stage converter and method for operating a modular multi-stage converter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100034001A1 (en) * 2006-12-21 2010-02-11 Siemens Aktiengesellschaft Converter with Short-Circuit Current Limiting
US20140226373A1 (en) * 2013-02-13 2014-08-14 Korea Electrotechnology Research Institute Method for Suppressing Circulating Current in Modular Multilevel Converter for High Voltage Direct-Current Transmission
EP3036823A1 (en) * 2013-09-26 2016-06-29 Siemens Aktiengesellschaft Multilevel inverter
EP3614543A1 (en) * 2018-08-20 2020-02-26 General Electric Technology GmbH Switching valve

Also Published As

Publication number Publication date
GB202212774D0 (en) 2022-10-19
WO2021175428A1 (en) 2021-09-10

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