CN108390575A - A kind of current converter for shipping shore power system - Google Patents
A kind of current converter for shipping shore power system Download PDFInfo
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- CN108390575A CN108390575A CN201810258852.9A CN201810258852A CN108390575A CN 108390575 A CN108390575 A CN 108390575A CN 201810258852 A CN201810258852 A CN 201810258852A CN 108390575 A CN108390575 A CN 108390575A
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- 238000000034 method Methods 0.000 abstract description 14
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- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 10
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
-
- 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
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to a kind of current converter for shipping shore power system, which includes rectification side current converter, inverter side current converter and failure removal device；The failure removal device includes mainly alternating-current switch, dc switch, by-pass switch, earthing switch, fuse；Control system is by controlling the automatic excision of alternating-current switch, dc switch, by-pass switch, earthing switch realization to different faults end.The advantage of the invention is that：Alternating current in harbour distribution network can be converted to the voltage class and frequency needed for ship by the present invention, the reliability of system is improved using positive and negative two-layer configuration, exchange side Harmonics of Input is reduced using 12 pulsating wave transverter, system voltage coefficient of stabilization is improved, reduces equipment failure rate；Meanwhile can realize that failure is quickly cut off automatically in operational process by failure removal device, ensure not power off during system power supply, does not influence ship normal power supply.
Description
Technical field
The present invention relates to shipping shore power system fields, more particularly to a kind of current converter for shipping shore power system.
Background technology
With the continuous expansion of China's economic high speed development and foreign trade, the production scale rapid growth at harbour, harbour
The problems such as energy consumption and pollutant discharge amount, can not be ignored.Large ship mainly utilizes included diesel generating set during reaching port
Ship electricity consumption is provided, since diesel generating set needs great amount of fuel oil（Heavy oil or diesel oil）, the right life of fuel oil generates big in the process
Amount sulfide and nitrogen oxides seriously pollute surrounding enviroment.Under this environment, not only saved can not for the use of shore electric power
Generative fuel and environmental protection is played a significant role.
Various countries are different using ship electricity system, there are mainly three types of：Three-phase alternating current 450V/60Hz, three-phase alternating current 6.6kV/60Hz
And 400V/50Hz.It is different from most of ship electricity frequencies very to go to dock since China's mains frequency is 50Hz, for reality
Existing power supply of the bank electricity power supply system to ship, it is necessary to utilize variable voltage variable frequency technology by the 50Hz convert alternating currents of China's harbour distribution network
At the voltage class and frequency at ship demand.
Current inland navigation craft bank electricity device is all simple converter plant, has pulse number small, and harmonic content is larger to be lacked
Point, current commutation device is directly connected using the DC output end of two level fully controlled bridge unit of three-phase, when a certain series connection transverter list
When first failure, entire transverter, which needs to be latched, stops transport, and ship unpowered power supply influences ship normal work and life power supply.
Invention content
The technical problem to be solved in the present invention is to provide a kind of current converters for shipping shore power system, can be by harbour
Alternating current in power grid is converted to voltage class and frequency needed for ship, and realizes that current converter failure is automatic in power supply process
Excision, prevents from leading to power delivery termination because of current converter failure.
In order to solve the above technical problems, the technical scheme is that：A kind of current converter for shipping shore power system,
Its innovative point is：Including rectification side current converter, inverter side current converter and failure removal device, the rectification side change of current dress
It sets the three-phase bus to enter the station by sending end AC network to connect with sending end AC network, the inverter side current converter passes through receiving end
The outbound three-phase bus of AC network is connect with by AC network；
The rectification side current converter includes two rectification side change of current transformations of the rectification side converter power transformer being set up in parallel and connection
The rectifier of device, the rectifier include the rectification unit A being set up in parallel, rectification unit B, rectification unit C and rectification unit D；
The inverter side current converter includes two inverter side change of current transformations of the inverter side converter power transformer being set up in parallel and connection
The inverter of device, the inverter include the inversion unit A being set up in parallel, inversion unit B, inversion unit C and inversion unit D；
The rectifier and inverter are composed in series by two 12 pulsation bridge inverters, series connection node ground connection, series connection
Positive and negative both ends are connected to one-way conduction power diode E and one-way conduction power diode F afterwards；Each 12 pulsation bridge-type
Transverter is in series by two six pulsation bridge inverters, and the six pulsation bridge inverter is that the three-phase based on IGBT is complete
Bridge translation circuit；
The failure removal device includes the alternating-current switch A being connect with rectification side converter power transformer and alternating-current switch B, with inverter side
The alternating-current switch C and alternating-current switch D of converter power transformer connection are arranged straight on connection rectification unit B and rectification unit C circuits
Switch A and dc switch B is flowed, dc switch C and dc switch on connection inversion unit B and inversion unit C circuits are set
D, is arranged the dc switch E on connection inversion unit A and the inside and outside circuits of inversion unit B and dc switch F, and setting is connecting
The inversion unit C and dc switch G on the inside and outside circuits of inversion unit D and dc switch H；
The failure removal device further includes the earthing switch A being connect respectively with rectification side current converter and inverter side current converter
With earthing switch B, and it is additionally provided between earthing switch A and earthing switch B the dc switch I of two earthing switches of connection；Setting
Fuse A and by-pass switch A in connection rectification unit A and rectification unit B on circuit, setting in connection rectification unit C and
Fuse B and by-pass switch B in rectification unit D on circuit, setting is in connection inversion unit A and inversion unit B on circuit
Fuse C and by-pass switch C, fuse D and bypass in connection inversion unit C and inversion unit D on circuit are set and opened
Close D.
Further, the rectification side converter power transformer is Y/Y/ △ three-winding transformers, the inverter side change of current transformation
Device is △/Y/Y three-winding transformers.
Further, the outbound three-phase of the sending end AC network enters the station three-phase bus and the receiving end AC network is female
Active filter and power compensating device are connected on line.
Further, the rectification unit and inversion unit both ends flying capcitor, divider resistance and inverse parallel crystalline substance lock successively
Pipe pair, and the anti-parallel thyristor for multiple antiparallel thyristor A and thyristor B to being connected in series.
Further, the fuse A is connected with the thyristor B anodes for being connected across the both ends rectification unit A, and fuse A is another
One end is connected with one-way conduction power diode E anodes；The one end the by-pass switch A and one-way conduction power diode E anodes
It is connected, the by-pass switch A other ends are connected with the thyristor B cathodes for being connected across the second both ends rectification unit B；
The fuse B is connected with the thyristor B cathodes for being connected across the both ends rectification unit D, the fuse B other ends and one-way conduction
Power diode F cathodes are connected；The one end the by-pass switch B is connected with the thyristor B anodes for being connected across the both ends rectification unit C,
The by-pass switch B other ends are connected with one-way conduction power diode F cathodes；
The fuse C is connected with one-way conduction power diode E cathodes, the fuse C other ends and is connected across inversion unit A two
The thyristor A cathodes at end are connected；The one end the by-pass switch C is connected with one-way conduction power diode E cathodes, by-pass switch C
The other end is connected with dc switch E, the dc switch E other ends and the thyristor A anode phases for being connected across the both ends inversion unit B
Even；
The fuse D is connected with one-way conduction power diode F anodes, the fuse D other ends and is connected across inversion unit D two
The thyristor A anodes at end are connected；The one end the by-pass switch D is connected with the thyristor A cathodes for being connected across the both ends inversion unit C,
The by-pass switch D other ends are connected with dc switch G, and the dc switch G other ends are connected with fuse D.
Further, the failure removal device further includes one-way conduction power diode A, one-way conduction power diode
B, one-way conduction power diode C and one-way conduction power diode D, the one-way conduction power diode A and by-pass switch A
Parallel connection, one-way conduction power diode A cathodes are connected with one-way conduction power diode E anodes；The one-way conduction power two
Pole pipe B is in parallel with by-pass switch B, and one-way conduction power diode B anodes are connected with one-way conduction power diode F cathodes；Institute
It states one-way conduction power diode C anodes with one-way conduction power diode E cathodes to be connected, one-way conduction power diode C is cloudy
Pole is connected with dc switch F；The one-way conduction power diode D anodes are connected with dc switch D, two pole of one-way conduction power
Pipe D cathodes are connected with dc switch H；
The other end of the dc switch F is connected with dc switch C, dc switch C and dc switch I, dc switch D and ground connection
Switch B is connected, earthing switch B other ends ground connection；The dc switch I other ends and dc switch A, dc switch B and earthing switch A
It is connected, earthing switch A other ends ground connection；The dc switch A other ends are connected with one-way conduction power diode A anodes, and direct current is opened
The B other ends are closed with one-way conduction power diode B cathodes to be connected.
Further, the current converter further include filter inductor A, filter inductor B and with filter inductor A,
The Overvoltage suppressing circuit that filter inductor B is arranged in a one-to-one correspondence, and the Overvoltage suppressing circuit is that reverse blocking formula is excessively electric
Constrain system RC circuits；
The filter inductor A connects with rectification side converter power transformer secondary side, and with above-mentioned rectification side six pulse bridge convertor
Device input side is connected；
The filter inductor B and above-mentioned rectification side six bridge inverter outlet side of pulsing are connected, and with inverter side change of current transformation
Device primary side is connected.
Further, fault detection module, fault comprehensive unit and cell controller, institute are additionally provided in the current converter
It includes current sensing means, voltage check device and temperature-detecting device, the current sensing means, electricity to state fault detection module
Pressure detection device and temperature-detecting device outlet side are connect with fault comprehensive unit；The fault comprehensive unit is by fault detect
The signal that module is sent into is sent into cell controller after carrying out comprehensive analysis of fault.
Common failure is divided into two types, and a type is symmetric form failure, and another type is chiasma type failure；Institute
Stating symmetric form failure includes：Rectification side current converter upper end independent failure, rectification side current converter lower end independent failure, inverter side
Current converter upper end independent failure, inverter side current converter lower end independent failure, rectification side current converter upper end and inverter side are changed
Flow device upper end simultaneous faults, rectification side current converter lower end and inverter side current converter lower end simultaneous faults.
The chiasma type failure includes：It is rectification side current converter upper end and inverter side current converter upper end simultaneous faults, whole
Flow side current converter lower end and inverter side current converter upper end simultaneous faults.
Rectification side current converter upper end independent failure, inverter side current converter upper end independent failure, rectification side current converter
When upper end and inverter side current converter upper end simultaneous faults, failure end cuts off control method and includes the following steps automatically：
Step 1：Closing in sequence dc switch I, earthing switch A and earthing switch B is disconnected；
Step 2：Turn off rectification side current converter upper end and inverter side current converter upper end converter power device IGBT；
Step 3：It is closed by-pass switch A and by-pass switch C, fuse A and fuse C flow through larger discharge current, quick fuse
Malfunctioning module is isolated；
Step 4：Sequentially opened dc switch A and dc switch C, alternating-current switch A and alternating-current switch C is disconnected, failure end is cut automatically
Except completion.
Rectification side current converter lower end independent failure, inverter side current converter lower end independent failure, rectification side current converter
When lower end and inverter side current converter lower end simultaneous faults, failure end cuts off control method and includes the following steps automatically：
Step 1：Closing in sequence dc switch I, earthing switch A and earthing switch B is disconnected；
Step 2：Turn off rectification side current converter lower end and inverter side current converter lower end converter power device IGBT；
Step 3：It is closed by-pass switch B and by-pass switch D, fuse B and fuse D flow through larger discharge current, quick fuse
Malfunctioning module is isolated；
Step 4：Sequentially opened dc switch B and dc switch D, alternating-current switch B and alternating-current switch D is disconnected, failure end is cut automatically
Except completion.
When rectification side current converter upper end and inverter side current converter lower end simultaneous faults, control method is removed at failure end automatically
Include the following steps：
Step 1：Turn off rectification side current converter upper end and inverter side current converter lower end converter power device IGBT；
Step 2：It is closed by-pass switch A and by-pass switch D, fuse A and fuse D flow through larger discharge current, quick fuse
Malfunctioning module is isolated；
Step 3：Sequentially opened earthing switch A and earthing switch B, it is closed dc switch H, disconnects alternating-current switch A and alternating-current switch
D, failure end cut off completion automatically.
When rectification side current converter lower end and inverter side current converter upper end simultaneous faults, control method is removed at failure end automatically
Include the following steps：
Step 1：Turn off rectification side current converter lower end and inverter side current converter upper end converter power device IGBT；
Step 2：It is closed by-pass switch B and by-pass switch C, fuse B and fuse C flow through larger discharge current, quick fuse
Malfunctioning module is isolated.
Step 3：Sequentially opened earthing switch A and earthing switch B, it is closed dc switch C, alternating-current switch B is disconnected and exchanges
Switch C, failure end cut off completion automatically.
When short trouble occurs for rectification unit and inversion unit, failure end anti-parallel thyristor is on by-pass switch A and side
It is open-minded in the way switch C reaction time.
The advantage of the invention is that：The present invention is used for the current converter of shipping shore power system, can will be in harbour distribution network
Alternating current is converted to voltage class and frequency needed for ship, and the reliability of system is improved using positive and negative two-layer configuration, uses
12 pulsating wave transverter reduces exchange side Harmonics of Input, improves system voltage coefficient of stabilization, reduces equipment failure rate；Meanwhile
It can realize that failure is quickly cut off automatically in operational process by failure removal device, ensure not power off during system power supply,
Ship normal power supply is not influenced.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is structure principle chart of the present invention for the current converter of shipping shore power system.
Fig. 2 is the shore electric power structure drawing of device for shipping shore power system.
Fig. 3 and Fig. 4 is working state schematic representation after monopole failure of the present invention is cut off automatically.
Fig. 5 and Fig. 6 is working state schematic representation after cross faults of the present invention are cut off automatically.
Specific implementation mode
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
Embodiment
The present embodiment is used for the current converter of shipping shore power system, as shown in Figure 1, including rectification side current converter 1, inversion
Side current converter 2 and failure removal device, the three-phase bus and sending end that rectification side current converter 1 is entered the station by sending end AC network
AC network connects, and inverter side current converter 2 is connect by the outbound three-phase bus of receiving end AC network with by AC network.
Rectification side current converter 1 includes that the rectification side converter power transformer 11 being set up in parallel and the two rectification side changes of current of connection become
The rectifier 12 of depressor 11, rectifier 12 include be set up in parallel rectification unit 12a, rectification unit 12b, rectification unit 12c and
Rectification unit 12d.
Inverter side current converter 2 includes that the inverter side converter power transformer 21 being set up in parallel and the two inverter side changes of current of connection become
The inverter 22 of depressor 21, inverter 22 include be set up in parallel inversion unit 22a, inversion unit 22b, inversion unit 22c and
Inversion unit 22d.
Rectifier 12 and inverter 22 are composed in series by two 12 pulsation bridge inverters, series connection node ground connection,
Positive and negative both ends are connected to one-way conduction power diode D2 and one-way conduction power diode D6 after series connection；Each 12 arteries and veins
Dynamic bridge inverter is in series by two six pulsation bridge inverters, and the six pulsation bridge inverter is based on IGBT's
Three phase full bridge translation circuit.
Failure removal device includes the alternating-current switch S11 being connect with rectification side converter power transformer 11 and alternating-current switch S12, with
The alternating-current switch S21 and alternating-current switch S22 that inverter side converter power transformer 21 connects, setting is in connection rectification unit 12b and rectification
Dc switch NBS11 on unit 12c circuits and dc switch NBS12, setting is in connection inversion unit 22b and inversion unit
Dc switch NBS21 on 22c circuits and dc switch NBS22, be arranged in connection inversion unit 22a and inversion unit 22b,
Dc switch NBS23 on external circuit and dc switch NBS24, be arranged in connection inversion unit 22c and inversion unit 22d,
Dc switch NBS25 on external circuit and dc switch NBS26；Failure removal device further include respectively with rectification side current converter
1 and inverter side current converter 2 the earthing switch NBGS1 that connects and earthing switch NBGS2, and in earthing switch NBGS1 and ground connection
The dc switch NBS3 of two earthing switches of connection is additionally provided between switch NBGS2；Setting is in connection rectification unit 12a and rectification list
Fuse F11 and by-pass switch D11 in first 12b on circuit, setting electricity in connection rectification unit 12c and rectification unit 12d
The fusing on circuit in connection inversion unit 22a and inversion unit 22b is arranged in the fuse F12 and by-pass switch D12 of road
The fuse F22 in connection inversion unit 22c and inversion unit 22d on circuit and side is arranged in device F21 and by-pass switch D21
Way switch D22.
Rectification side converter power transformer 11 be Y/Y/ △ three-winding transformers, inverter side converter power transformer 21 be △/Y/Y tri- around
Group transformer.Make to pulse what bridge inverters flowed through for two six in 12 pulsation bridge inverters using △-Y type connection types
Alternating current phases differ 30 °, pulse 12 times in each AC mains cycle to export rectified voltage Ud.Current converter is sent
It is connected to source filter on the three-phase bus that enters the station of end AC network and the outbound three-phase bus of receiving end AC network and power is mended
Repay device 70.
Failure removal device is in system worked well, alternating-current switch S11, alternating-current switch S12, alternating-current switch S21, exchange
Switch S22, dc switch NBS11, dc switch NBS12, dc switch NBS21, dc switch NBS22, dc switch
NBS23, dc switch NBS25, earthing switch NBGS1 and earthing switch NBGS2 are normally closed, by-pass switch D11, by-pass switch
D12, by-pass switch D21, by-pass switch D22, dc switch NBS24, dc switch NBS26 and dc switch NBS3 are normally opened.
Each rectification unit and inversion unit both ends flying capcitor C1, divider resistance R1 and anti-parallel thyristor pair successively
6a,6b；And anti-parallel thyristor is that multiple antiparallel Thyristors in series form to 6a, 6b.
Fuse F11 is connected with the thyristor 6b anodes for being connected across the first both ends rectification unit 12a, and fuse F11 is another
End is connected with one-way conduction power diode D2 anodes；The one end by-pass switch D11 and one-way conduction power diode D2 anode phases
Even, the by-pass switch D11 other ends are connected with the thyristor 6b cathodes for being connected across the second both ends rectification unit 12b；Fuse F12 with
The thyristor 6b cathodes for being connected across the 4th both ends rectification unit 12d are connected, the fuse F12 other ends and two pole of one-way conduction power
Pipe D6 cathodes are connected；The one end by-pass switch D12 is connected with the thyristor 6b anodes for being connected across the both ends third rectification unit 12c, other
The way switch D12 other ends are connected with one-way conduction power diode D6 cathodes；Fuse F21 and power diode D2 cathode phases
Even, the fuse F21 other ends are connected with the thyristor 6a cathodes for being connected across the first both ends inversion unit 22a；By-pass switch D21 mono-
End is connected with one-way conduction power diode D2 cathodes, and the by-pass switch D21 other ends are connected with dc switch NBS23, and direct current is opened
The NBS23 other ends are closed with the thyristor 6a anodes for being connected across the second both ends inversion unit 22b to be connected；Fuse F22 and power two
Pole pipe D6 anodes are connected, and the fuse F22 other ends are connected with the thyristor 6a anodes for being connected across the 4th both ends inversion unit 22d；
The one end by-pass switch D22 is connected with the thyristor 6a cathodes for being connected across the both ends third inversion unit 22c, and by-pass switch D22 is another
End is connected with dc switch NBS25, and the dc switch NBS25 other ends are connected with fuse F22.
Failure removal device further includes one-way conduction power diode D1, one-way conduction power diode D4, one-way conduction
Power diode D3 and one-way conduction power diode D5, one-way conduction power diode D1 is in parallel with by-pass switch D11, unidirectionally
Conducting power diode D1 cathodes are connected with one-way conduction power diode D2 anodes；One-way conduction power diode D4 and bypass
Switch D12 is in parallel, and one-way conduction power diode D4 anodes are connected with one-way conduction power diode D6 cathodes；One-way conduction work(
Rate diode D3 anodes are connected with one-way conduction power diode D2 cathodes, and one-way conduction power diode D3 cathodes are opened with direct current
NBS24 is closed to be connected；One-way conduction power diode D5 anodes are connected with dc switch NBS22, one-way conduction power diode D5
Cathode is connected with dc switch NBS26.
The other end of dc switch NBS24 is connected with dc switch NBS21, dc switch NBS21 and dc switch NBS3,
Dc switch NBS22 is connected with earthing switch NBGS2, earthing switch NBGS2 other ends ground connection；The dc switch NBS3 other ends with
Dc switch NBS11, dc switch NBS12 are connected with earthing switch NBGS1, earthing switch NBGS1 other ends ground connection；Direct current is opened
It closes the NBS11 other ends with one-way conduction power diode D1 anodes to be connected, the dc switch NBS12 other ends and one-way conduction power
Diode D4 cathodes are connected.
One-way conduction power diode D1, one-way conduction power diode D3, one-way conduction power diode D4 and unidirectional
Conducting power diode D5 is respectively used to the electricity of limiting fuses F11, fuse F21, fuse F12 and the both ends fuse F22
Potential difference, while continuous current circuit can be provided.
Current converter further include filter inductor 31, filter inductor 32 and with filter inductor 31, filter inductor
The 32 Overvoltage suppressing circuits 4 being arranged in a one-to-one correspondence, and Overvoltage suppressing circuit 4 is reverse blocking formula Overvoltage suppressing RC electricity
The harmonic component that road, filter inductor 31 and filter inductor 32 generate transverter is filtered；Filter inductor 31 with it is whole
The series connection of 11 secondary side of side converter power transformer is flowed, and is connected with the pulsation bridge inverter input side of above-mentioned rectification side six；Filter inductance
Device 32 is connected with the pulsation bridge inverter outlet side of above-mentioned rectification side six, and is connected with 21 primary side of inverter side converter power transformer.
An electricity being made of fuse, semiconductor devices and by-pass switch is constructed at every 12 pulse conversion devices both ends
Road, by-pass switch are off when current converter is run, and when certain 12 pulse conversion devices break down, pass through control
Circuit processed closes by-pass switch, and fuse flows through larger discharge current, and quick fuse is isolated by malfunctioning module.It is short due to occurring
When the failure of road, by-pass switch reaction needs the time, if there is electric current flows through inverter inside, may make the power damaged
Device is further damaged and bursts, and connect bidirectional thyristor 6a, and 6b so that no matter electric current is positive or reversely have over current protection
Protective function, bidirectional thyristor 6a, 6b are connected within the by-pass switch reaction time.
Fault detection module 75, fault comprehensive unit 76 and cell controller 73 are additionally provided in current converter, such as Fig. 2 institutes
Show, fault detection module 75 includes mainly current sensing means 51, voltage check device 52 and temperature-detecting device 53, electric current inspection
Device 51, voltage check device 52 and 53 outlet side of temperature-detecting device is surveyed to connect with fault comprehensive unit 76；Failure is examined
Survey that the detection signal such as voltage, electric current and temperature that module 75 acquires is divided through signal processing circuit, Phototube Coupling, filtering are put
Big feeding A/D converter and the progress comprehensive analysis of fault of fault comprehensive unit 76 after waiting integrated treatments, carry out comprehensive analysis of fault
It is sent into cell controller 73 afterwards；And fault comprehensive unit 76 is suitable for the fault comprehensive of synchronous grid-connecting apparatus simultaneously.Change of current module
71 receive the trigger signal of driving device 72, realize the control to each transverter, the electric network source of input is converted to ship
Required voltage class and frequency.The pwm signal that 72 receiving unit controller of driving device is sent out is realized in current converter
Power device PWM control.Cell controller 73 mainly realizes following functions：1. the signal to acquisition improves, mould
Quasi- signal is converted to digital signal and is sent into foundation of the central processing unit 74 as control algolithm, and is used as display and failure guarantor simultaneously
Shield；2. the PWM that forwarding central processing unit 74 exports is instructed to driving device 72；3. the fault comprehensive result to input is analyzed
Control protection act triggering；4. the I/O mouths of cell controller 73 are connect with display device, it is sent to display information.Centre
Manage device 74）Realize entire current converter control, send out PWM instructions by control algolithm generates PWM wave by cell controller 73
It is sent to driving device 72.
To realize the automatic cutting method of failure of current converter, failure is divided into two types, a type is symmetric form
Failure, another type are chiasma type failure；Symmetric form failure includes：It is 1 upper end of rectification side current converter, 101 independent failure, whole
It flows under 1 lower end of side current converter, 102 independent failure, 2 upper end of inverter side current converter, 201 independent failure, inverter side current converter 2
201 simultaneous faults of 202 independent failures, 1 upper end 101 of rectification side current converter and 2 upper end of inverter side current converter, rectification side is held to change
Flow 1 lower end 102 of device and 2 lower end of inverter side current converter, 202 simultaneous faults.
Chiasma type failure includes：2 event simultaneously of upper end 201 of 1 upper end 101 of rectification side current converter and inverter side current converter
Barrier, 201 simultaneous faults of 1 lower end 102 of rectification side current converter and 2 upper end of inverter side current converter.Specifically with reference to diagram
It is bright
As shown in figure 3, when there is 1 upper end of rectification side current converter, 101 independent failure, 2 upper end 201 of inverter side current converter individually
Failure end cuts off control automatically when failure, 1 upper end 101 of rectification side current converter and 2 201 simultaneous faults of upper end of inverter side current converter
Method processed includes the following steps：
Step 1：Closing in sequence dc switch NBS3, earthing switch NBGS1 and earthing switch NBGS2 is disconnected；
Step 2：Turn off 1 upper end 101 of rectification side current converter and 2 upper end of inverter side current converter, 201 converter power device
IGBT；
Step 3：It is closed by-pass switch D11 and by-pass switch D21, fuse F11 and fuse F21 flow through larger discharge current,
Quick fuse is isolated by malfunctioning module；
Step 4：Sequentially opened dc switch NBS11 and dc switch NBS21, alternating-current switch S11 and alternating-current switch S21 is disconnected,
Failure end cuts off completion automatically.
As shown in figure 4, when there is 1 lower end of rectification side current converter, 102 independent failure, 2 lower end 202 of inverter side current converter
When independent failure, 1 lower end 102 of rectification side current converter and 2 202 simultaneous faults of lower end of inverter side current converter, failure end is automatic
Excision control method includes the following steps：
Step 1：Closing in sequence dc switch NBS3, earthing switch NBGS1 and earthing switch NBGS2 is disconnected；
Step 2：Turn off 1 lower end 102 of rectification side current converter and 2 lower end of inverter side current converter, 202 converter power device
IGBT；
Step 3：It is closed by-pass switch D12 and by-pass switch D22, fuse F12 and fuse F22 flow through larger discharge current,
Quick fuse is isolated by malfunctioning module；
Step 4：Sequentially opened dc switch NBS12 and dc switch NBS22, alternating-current switch S12 and alternating-current switch S22 is disconnected,
Failure end cuts off completion automatically.
As shown in figure 5, when there is 2 event simultaneously of lower end 202 of 1 upper end 101 of rectification side current converter and inverter side current converter
When barrier, failure end is automatically except control method includes the following steps：
Step 1：Turn off 1 upper end 101 of rectification side current converter and 2 lower end of inverter side current converter, 202 converter power device
IGBT；
Step 2：It is closed by-pass switch D11 and by-pass switch D22, fuse F11 and fuse F22 flow through larger discharge current,
Quick fuse is isolated by malfunctioning module；
Step 3：Sequentially opened earthing switch NBGS1 is exchanged out with earthing switch NBGS2, closure dc switch NBS26, disconnection
S11 and alternating-current switch S22 is closed, failure end cuts off completion automatically.
As shown in fig. 6, when there is 2 event simultaneously of upper end 201 of 1 lower end 102 of rectification side current converter and inverter side current converter
When barrier, failure end is automatically except control method includes the following steps：
Step 1：Turn off 1 lower end 102 of rectification side current converter and 2 upper end of inverter side current converter, 201 converter power device
IGBT；
Step 2：Step 2：It is closed by-pass switch D12 and by-pass switch D21, fuse F12 and fuse F21 flow through larger put
Malfunctioning module is isolated for electric current, quick fuse.
Step 3：Sequentially opened earthing switch NBGS1, earthing switch NBGS2, it is closed dc switch NBS24, disconnects exchange
Switch S12 and alternating-current switch S21, failure end cut off completion automatically.
The present embodiment by the way that the quick and precisely control to the active power of transmission may be implemented to effective control of transverter,
Can also power oscillation damping, improve system stability, limiting short-circuit current；Circuit is coupled using series multiplexization（12 pulsating wave
Transverter）, exchange side Harmonics of Input is reduced, system voltage coefficient of stabilization is improved, reduces equipment failure rate；Using bipolar junction
Structure, when certain pole is broken down, system detects and isolates failure pole automatically, after isolation to current converter output voltage be adjusted with
Again meet shore electric power requirement, realize that failure is quickly cut off automatically in operational process, ensure not power off during system power supply,
Ship normal power supply is not influenced.
The basic principles and main features and advantages of the present invention of the present invention have been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (8)
1. a kind of current converter for shipping shore power system, it is characterised in that：Including rectification side current converter, the inverter side change of current
Device and failure removal device, the rectification side current converter are exchanged by the three-phase bus that sending end AC network enters the station with sending end
Power grid connects, and the inverter side current converter is connect by the outbound three-phase bus of receiving end AC network with by AC network；
The rectification side current converter includes two rectification side change of current transformations of the rectification side converter power transformer being set up in parallel and connection
The rectifier of device, the rectifier include the rectification unit A being set up in parallel, rectification unit B, rectification unit C and rectification unit D；
The inverter side current converter includes two inverter side change of current transformations of the inverter side converter power transformer being set up in parallel and connection
The inverter of device, the inverter include the inversion unit A being set up in parallel, inversion unit B, inversion unit C and inversion unit D；
The rectifier and inverter are composed in series by two 12 pulsation bridge inverters, series connection node ground connection, series connection
Positive and negative both ends are connected to one-way conduction power diode E and one-way conduction power diode F afterwards；Each 12 pulsation bridge-type
Transverter is in series by two six pulsation bridge inverters, and the six pulsation bridge inverter is that the three-phase based on IGBT is complete
Bridge translation circuit；
The failure removal device includes the alternating-current switch A being connect with rectification side converter power transformer and alternating-current switch B, with inverter side
The alternating-current switch C and alternating-current switch D of converter power transformer connection are arranged straight on connection rectification unit B and rectification unit C circuits
Switch A and dc switch B is flowed, dc switch C and dc switch on connection inversion unit B and inversion unit C circuits are set
D, is arranged the dc switch E on connection inversion unit A and the inside and outside circuits of inversion unit B and dc switch F, and setting is connecting
The inversion unit C and dc switch G on the inside and outside circuits of inversion unit D and dc switch H；
The failure removal device further includes the earthing switch A being connect respectively with rectification side current converter and inverter side current converter
With earthing switch B, and it is additionally provided between earthing switch A and earthing switch B the dc switch I of two earthing switches of connection；Setting
Fuse A and by-pass switch A in connection rectification unit A and rectification unit B on circuit, setting in connection rectification unit C and
Fuse B and by-pass switch B in rectification unit D on circuit, setting is in connection inversion unit A and inversion unit B on circuit
Fuse C and by-pass switch C, fuse D and bypass in connection inversion unit C and inversion unit D on circuit are set and opened
Close D.
2. the current converter according to claim 1 for shipping shore power system, it is characterised in that：The rectification side change of current
Transformer is Y/Y/ △ three-winding transformers, and the inverter side converter power transformer is △/Y/Y three-winding transformers.
3. the current converter according to claim 1 for shipping shore power system, it is characterised in that：The sending end alternating current
It is connected to active filter and power back-off on the outbound three-phase bus of three-phase bus and the receiving end AC network that net enters the station
Device.
4. the current converter according to claim 1 for shipping shore power system, it is characterised in that：The rectification unit and
Inversion unit both ends flying capcitor, divider resistance and anti-parallel thyristor pair successively, and the anti-parallel thyristor is to being multiple
Antiparallel thyristor A and thyristor B are connected in series.
5. the current converter according to claim 1 for shipping shore power system, it is characterised in that：The fuse A with
The thyristor B anodes for being connected across the both ends rectification unit A are connected, the fuse A other ends and one-way conduction power diode E anode phases
Even；The one end the by-pass switch A is connected with one-way conduction power diode E anodes, the by-pass switch A other ends and is connected across second
The thyristor B cathodes at the both ends rectification unit B are connected；
The fuse B is connected with the thyristor B cathodes for being connected across the both ends rectification unit D, the fuse B other ends and one-way conduction
Power diode F cathodes are connected；The one end the by-pass switch B is connected with the thyristor B anodes for being connected across the both ends rectification unit C,
The by-pass switch B other ends are connected with one-way conduction power diode F cathodes；
The fuse C is connected with one-way conduction power diode E cathodes, the fuse C other ends and is connected across inversion unit A two
The thyristor A cathodes at end are connected；The one end the by-pass switch C is connected with one-way conduction power diode E cathodes, by-pass switch C
The other end is connected with dc switch E, the dc switch E other ends and the thyristor A anode phases for being connected across the both ends inversion unit B
Even；
The fuse D is connected with one-way conduction power diode F anodes, the fuse D other ends and is connected across inversion unit D two
The thyristor A anodes at end are connected；The one end the by-pass switch D is connected with the thyristor A cathodes for being connected across the both ends inversion unit C,
The by-pass switch D other ends are connected with dc switch G, and the dc switch G other ends are connected with fuse D.
6. the failure removal device further includes one-way conduction power diode A, one-way conduction power diode B, one-way conduction
Power diode C and one-way conduction power diode D, the one-way conduction power diode A is in parallel with by-pass switch A, unidirectionally
Conducting power diode A cathodes are connected with one-way conduction power diode E anodes；The one-way conduction power diode B and side
Way switch B is in parallel, and one-way conduction power diode B anodes are connected with one-way conduction power diode F cathodes；The one-way conduction
Power diode C anodes are connected with one-way conduction power diode E cathodes, and one-way conduction power diode C cathodes are opened with direct current
F is closed to be connected；The one-way conduction power diode D anodes are connected with dc switch D, one-way conduction power diode D cathodes with
Dc switch H is connected；
The other end of the dc switch F is connected with dc switch C, dc switch C and dc switch I, dc switch D and ground connection
Switch B is connected, earthing switch B other ends ground connection；The dc switch I other ends and dc switch A, dc switch B and earthing switch A
It is connected, earthing switch A other ends ground connection；The dc switch A other ends are connected with one-way conduction power diode A anodes, and direct current is opened
The B other ends are closed with one-way conduction power diode B cathodes to be connected.
7. the current converter according to claim 1 for shipping shore power system, it is characterised in that：The current converter is also
Including filter inductor A, filter inductor B and the overvoltage being arranged in a one-to-one correspondence with filter inductor A, filter inductor B
Suppression circuit, and the Overvoltage suppressing circuit is reverse blocking formula Overvoltage suppressing RC circuits；
The filter inductor A connects with rectification side converter power transformer secondary side, and with above-mentioned rectification side six pulse bridge convertor
Device input side is connected；
The filter inductor B and above-mentioned rectification side six bridge inverter outlet side of pulsing are connected, and with inverter side change of current transformation
Device primary side is connected.
8. the current converter according to claim 1 for shipping shore power system, it is characterised in that：In the current converter
Be additionally provided with fault detection module, fault comprehensive unit and cell controller, the fault detection module include current sensing means,
Voltage check device and temperature-detecting device, the current sensing means, voltage check device and temperature-detecting device outlet side
It is connect with fault comprehensive unit；The signal that fault detection module is sent by the fault comprehensive unit carries out comprehensive analysis of fault
After be sent into cell controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810258852.9A CN108390575B (en) | 2018-03-27 | 2018-03-27 | Converter for ship shore power system |
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|---|---|---|---|
| CN201810258852.9A CN108390575B (en) | 2018-03-27 | 2018-03-27 | Converter for ship shore power system |
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| CN110649825A (en) * | 2019-11-27 | 2020-01-03 | 新誉轨道交通科技有限公司 | Control system and control method for low-harmonic frequency converter of air conditioner |
| CN110912183A (en) * | 2019-10-31 | 2020-03-24 | 格瑞美科技(武汉)有限公司 | Power generation system topological structure containing multiple types of renewable energy sources |
| CN111897272A (en) * | 2020-08-18 | 2020-11-06 | 国网江苏省电力有限公司南通供电分公司 | Management and control device suitable for boats and ships bank electricity system and control system thereof |
| CN111953182A (en) * | 2020-08-21 | 2020-11-17 | 国网江苏省电力有限公司南通供电分公司 | Current conversion device for ship shore power and control system thereof |
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| CN108390575B (en) | 2023-11-14 |
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