CN108390377A - A kind of shore-based power supply system and the method for reducing excitation surge current - Google Patents
A kind of shore-based power supply system and the method for reducing excitation surge current Download PDFInfo
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- CN108390377A CN108390377A CN201810381210.8A CN201810381210A CN108390377A CN 108390377 A CN108390377 A CN 108390377A CN 201810381210 A CN201810381210 A CN 201810381210A CN 108390377 A CN108390377 A CN 108390377A
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- 230000005284 excitation Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000005611 electricity Effects 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000002955 isolation Methods 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 230000005669 field effect Effects 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
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- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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Classifications
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
- H02H9/002—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off limiting inrush current on switching on of inductive loads subjected to remanence, e.g. transformers
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Abstract
The present invention discloses a kind of shore-based power supply system and reduces the method for excitation surge current, wherein shore-based power supply system includes the shore electric power device and switchgear of concatenation；Wherein, shore electric power device includes the power conversion unit for connecting AC network, or include power conversion unit for connecting AC network and the output being connect with power conversion unit switch, switchgear includes the output switch for being connected and turning off bank electricity output；It further include the preliminary filling electrical circuit being connect with output switch in parallel；Preliminary filling electrical circuit includes energized circuit for carrying out gentle excitation to the main isolating transformer of shipboard and the field switch whether to work for controlling energized circuit, and energized circuit and field switch are connected in series with.The present invention can reach same purpose by being transformed to existing shore electric power equipment or switch cabinet equipment, without individually increasing the Transformer Close current-limiting apparatus that shoves.
Description
Technical field
The present invention relates to a kind of shore-based power supply systems reducing shipboard excitation surge current, are particularly suitable for ship bank base power supply neck
The high pressure in domain is gone on board application environment.
Background technology
The structural topology figure of existing bank electricity system as shown in Figure 1, its by shore-based power supply system, connection between ship and bank system and
Ship by the part of electric system is constituted.
Wherein, typical shore-based power supply system is generally as shown in Figure 2 comprising the input isolating transformer being sequentially connected in series
T1, shore electric power, output isolation transformer T2 and switchgear Q2 with output switch Q1.Wherein, T1 is that input isolation becomes
Depressor (nonessential), the voltage class for converting network voltage to needed for shore electric power；If network voltage and required voltage
When grade is consistent, it is convenient to omit.Q1 is the output switch (nonessential) that shore electric power ontology carries.T2 is output isolation transformation
Device (nonessential), according to IEC standard, is typically necessary addition for output voltage to be isolated, only in the low power part of low pressure
Conjunction can be omitted.Switchgear Q2 is bank electricity output switch (necessary), is used for the shutdown of final output voltage and current.
Typical ship by the part of electric system is generally as shown in Figure 3 comprising the main isolating transformer T3 of sequentially connected shipboard, master
Panel and sub-switchboard (or illumination, auxiliary switch board).Wherein, T3 is the main isolating transformer of shipboard, for ship-to-shore in high pressure
Electric system is necessary (part low pressure ship is nonessential), for being the voltage class needed for ship by shore electric power matching.
It, will necessarily there are one the mistakes of excitation in order to establish magnetic field in use, transformer never power-up state is to power-up state
Journey.And if it is rated voltage is directly added, then the exciting current of an impact is will produce, this electric current has with Magnetic circuit characters
It closes, tends to reach 5 times of rated current or more.That is, combined floodgate excitation surge current phenomenon existing for transformer.
So in above-mentioned bank electricity system, there may be excitation surge current problems by the main isolating transformer T3 of shipboard.For high pressure
The operating mode gone on board, inevitable there are one main transformer T3 (decompression becomes), rated capacity phase when capacity maximum with shore electric power itself
When.It is powered if it is " seamless switching " --- so transformer T3 has been excited on ship, does not have excitation surge current.If
It is that " seamed switching " is powered --- so it is exactly " transformer never power-up state to power-up state ".If not taking any arrange
It applies, then when bank side switchgear Q2 is attracted, dash current is likely to be breached 3 times of rated current or more.
For the combined floodgate excitation surge current problem of bank electricity system, most common measure is to increase a Transformer Close to shove limit
Flow device.As shown in figure 4, current-limiting apparatus is the device of a switch and resistor coupled in parallel in general, Transformer Close is shoved, pass through
The limitation of resistance versus current makes exciting current be reduced to the level (while excitation process is also elongated) of a very little, to solve
Dash current excessive problem.
The above-mentioned Transformer Close current-limiting apparatus that shoves has as a drawback that：It needs individually to increase a cabinet, increases and account for
Ground area, and increase individually switch, it is of high cost.
Invention content
The brief overview about the embodiment of the present invention is given below, in order to provide about certain aspects of the invention
Basic comprehension.It should be appreciated that outlined below is not the exhaustive general introduction about the present invention.It is not intended to determine this hair
Bright key or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain in simplified form
A little concepts, in this, as the preamble in greater detail discussed later.
The application is transformed existing shore electric power equipment or switch cabinet equipment, is closed without individually increasing transformer
The lock current-limiting apparatus that shoves can reach same purpose.
According to the application's in a first aspect, providing a kind of shore-based power supply system comprising the shore electric power device of concatenation and
Switchgear；Wherein, the shore electric power device includes the power conversion unit for connecting AC network, or including the company of being used for
The output switch for connecing the power conversion unit of AC network and being connect with the power conversion unit, the switchgear include being used for
The output of conducting and shutdown bank electricity output switchs；Wherein, further include the preliminary filling electrical circuit being connect with output switch in parallel；It is described pre-
Charge circuit includes for carrying out the energized circuit of gentle excitation to the main isolating transformer of shipboard and for controlling energized circuit
The field switch whether to work, energized circuit and field switch are connected in series with.
When the shore electric power device include power conversion unit for connecting AC network and with the power conversion
When the output switch of unit connection, the output switch in parallel connection of the preliminary filling electrical circuit and switchgear.
When the switchgear includes the bank electricity output switch for the shutdown of final output voltage and current, the precharge
Circuit is connect with the output switch in parallel of shore electric power device.
According to the second aspect of the application, a kind of method reducing excitation surge current is provided, in shore-based power supply system, being somebody's turn to do
Shore-based power supply system includes the shore electric power device and switchgear of concatenation；Wherein, the shore electric power device includes for connecting
The power conversion unit of AC network and the output switch being connect with the power conversion unit；This method includes：
In shore electric power device, the preliminary filling electrical circuit that setting one is connect with output switch in parallel, the preliminary filling electrical circuit
It include energized circuit for carrying out gentle excitation to the main isolating transformer of shipboard and for controlling whether energized circuit works
Field switch, energized circuit and field switch are connected in series with；
When power supply, field switch is closed, and shore electric power device idle voltage output simultaneously incrementally increases, specified until exporting
Voltage；
The main isolating transformer of shipboard is connected, gentle excitation is carried out to the main isolating transformer of shipboard by energized circuit；
After the completion of the main isolating transformer excitation of shipboard, be closed output switch, and disconnect field switch, for connection shipboard into
Row power supply.
According to the third aspect of the application, a kind of method reducing excitation surge current is provided, is used in shore-based power supply system, bank
Base power supply system includes the shore electric power device and switchgear of concatenation；Wherein, the switchgear includes for being connected and turning off bank
The output of electricity output switchs；It is characterized in that：This method includes：
In switchgear, the preliminary filling electrical circuit that setting one is connect with bank electricity output switch in parallel, the preliminary filling electrical circuit packet
It includes the energized circuit for carrying out gentle excitation to the main isolating transformer of shipboard and whether works for controlling energized circuit
Field switch, energized circuit and field switch are connected in series with；
When power supply, shore electric power device idle voltage output simultaneously incrementally increases, until output rated voltage；
The main isolating transformer of shipboard is connected, field switch is closed, is put down to the main isolating transformer of shipboard by energized circuit
Slow excitation；
After the completion of the main isolating transformer excitation of shipboard, the bank electricity output switch of closure switch cabinet, and field switch is disconnected, it is
The shipboard of connection is powered.
Wherein, the shore electric power device includes power conversion unit for connecting AC network and becomes with the power
The output switch of unit connection is changed, the output switch in parallel of the preliminary filling electrical circuit and switchgear connects, and when power supply, is first closed institute
The output switch of shore electric power device is stated, then makes shore electric power device idle voltage output and incrementally increases, it is specified until exporting
Voltage.
In said program, preliminary filling electrical circuit can be " resistance+mechanical switch " form, or " resistance+electronic switch " shape
Formula, or " electronic switch PWM is open-minded " form, such as preliminary filling electrical circuit are resistance and the electronic switch realization by concatenating, and are being become
When depressor closes a floodgate, preliminary filling electrical circuit is connected in electronic switch control, makes resistance string entry loop, and preset condition reaches (such as to pre-
Fix time or reach predeterminated voltage current value) after, electronic switch disconnects, and resistance and main circuit is disconnected, so that shore-based power supply
System is normally powered ship.Mechanical switch is identical with electronic switch principle, and I will not elaborate.It is for example pre-charged back again
Road is realized by the electronic switch that pwm signal controls, and in Transformer Close, preliminary filling electrical circuit is connected in electronic switch control,
Pwm signal is set to seal in circuit, after preset condition reaches (such as to the predetermined time or reach predeterminated voltage current value), electronic cutting
Shutdown is opened, and pwm signal and main circuit is disconnected, so that shore-based power supply system is normally powered ship.Electronic switch refers to
The running unit that connecting and disconnecting of the circuit is realized using electronic circuit and power electronic devices, includes at least a controllable electric drive
Device, such as thyristor (integrated gate commutated thyristor IGCT), transistor (such as insulated gate bipolar transistor IGBT), field effect
Ying Guan, silicon-controlled, relay etc..
As an example, the preliminary filling electrical circuit includes the resistance mutually concatenated and excitation contact-making switch, and resistance is used for
Gentle excitation is carried out to the main isolating transformer of shipboard, excitation contact-making switch is for controlling whether resistance accesses circuit to enter work
State.In the Transformer Close, circuit is connected in the control of excitation contact-making switch, and resistance string entry loop, preset condition is made to reach
To after (such as to the predetermined time or reaching predeterminated voltage current value), excitation contact-making switch disconnects, and resistance and circuit are disconnected,
So that shore-based power supply system is normally powered ship.
Using the method for the invention and device, compared with prior art, it is only necessary to which existing equipment is transformed, you can
Reach same purpose, the Transformer Close for increasing complete set as before is avoided to shove current-limiting apparatus (expensive, Er Qiezhan
Volume).Said program using the present invention has achieved the effect that reduce floor space, has saved cost, has practical well
Property.
Description of the drawings
Fig. 1 is the topological diagram of bank electricity system structure in the prior art；
Fig. 2 is the schematic diagram of shore-based power supply system in the prior art；
Fig. 3 is the schematic diagram of ship by the part of electric system in the prior art；
Fig. 4 is the schematic diagram of existing inrush phenomenon current-limiting apparatus；
Fig. 5 a are the schematic diagram (band transformer) of improved shore electric power device in embodiment 1；
Fig. 5 b are the schematic diagram of improved shore electric power device in embodiment 1 (without transformer)；
Fig. 6 a are the first embodiment figure of preliminary filling electrical circuit；
Fig. 6 b are the second embodiment figure of preliminary filling electrical circuit；
Fig. 6 c are the third embodiment figure of preliminary filling electrical circuit；
Fig. 7 is the schematic diagram of improved switchgear in embodiment 2.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " first ", " second ", " third " are used for description purposes only,
It is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
The present invention provides a kind of shore-based power supply system and reduces the method for excitation surge current, is set to existing shore-based power supply system
It is standby to be transformed, it can reach same purpose without individually increasing the Transformer Close current-limiting apparatus that shoves；It avoids as with previous
The Transformer Close that sample increases complete set is shoved current-limiting apparatus.
Embodiment 1
Referring to Fig. 5 a and Fig. 5 b, shore electric power device include power conversion unit for connecting AC network and with this
The output switch Q1 of power conversion unit connection further includes the preliminary filling electrical circuit being connected in parallel with output switch Q1, is pre-charged back
Road include energized circuit for carrying out gentle excitation to the main isolating transformer of shipboard and for control energized circuit whether work
The field switch of work, energized circuit and field switch are connected in series with；When work, field switch is closed, and shore electric power device is unloaded
Output voltage simultaneously incrementally increases, and until output rated voltage, then switchgear closure, gives shipboard main isolation transformation by energized circuit
Device carries out gentle excitation, after the completion of the main isolating transformer excitation of shipboard, the output switch Q1 being closed in shore electric power, and disconnection is encouraged
Magnetic switch is powered for the ship of connection.
In said program, preliminary filling electrical circuit includes the resistance mutually concatenated and excitation contact-making switch, and resistance is used for shipboard
Main isolating transformer carries out gentle excitation, and excitation contact-making switch is for controlling whether resistance accesses circuit to enter working condition.
In Transformer Close, circuit is connected in the control of excitation contact-making switch, makes resistance string entry loop, preset condition reach (such as to
Predetermined time (such as 120ms) reaches predeterminated voltage current value) after, excitation contact-making switch disconnects, and resistance and circuit are disconnected,
So that shore-based power supply system is normally powered ship.
In addition, preliminary filling electrical circuit can also be " resistance+electronic switch " in addition to " resistance+mechanical switch " form (Fig. 6 a)
Form (Fig. 6 b), or " electronic switch PWM is open-minded " form (Fig. 6 c), such as preliminary filling electrical circuit is the resistance and electronics by concatenating
Switch is realized, in Transformer Close, preliminary filling electrical circuit is connected in electronic switch control, makes resistance string entry loop, preset condition
After reaching (such as to the predetermined time or reach predeterminated voltage current value), electronic switch disconnects, and resistance and main circuit are disconnected,
So that shore-based power supply system is normally powered ship.Wherein, the electronic switch in Fig. 6 b and Fig. 6 c is " electric power thyristor
SCR ", it is practical to also have a variety of realization methods such as IGBT, GTO.Electronic switch in Fig. 6 b is constantly on, " is delayed by resistance
Punching "；It is by way of electronic switch Discontinuous Conduction come " buffering " and in Fig. 6 c.
Such as preliminary filling electrical circuit is realized by the electronic switch that pwm signal controls again, in Transformer Close, electronic switch
Preliminary filling electrical circuit is connected in control, and pwm signal is made to seal in circuit, and preset condition, which reaches, (such as to the predetermined time or reaches pre-
If voltage and current value) after, electronic switch disconnects, and pwm signal and main circuit is disconnected, so that shore-based power supply system is normally to ship
It is powered.Electronic switch refers to the running unit that connecting and disconnecting of the circuit is realized using electronic circuit and power electronic devices, at least
Including a controllable electric drive device, electric drive device includes but are not limited to thyristor, IGBT (Insulated
Gate Bipolar Transistor, insulated gate bipolar transistor), IGCT (Integrated Gate Commutated
Thyristors, integrated gate commutated thyristor) and TCR (Thyristor Controlled Reactor, thyristor control
Reactor processed) etc..In the present embodiment, preliminary filling electrical circuit includes resistance R1 and switchgear excitation contact-making switch K1.
In addition, the present invention also proposes a kind of method reducing excitation surge current, it is used in above-mentioned shore-based power supply system, this method
Including：
step1：(in Fig. 5 a or Fig. 5 b) " shore electric power excitation contact-making switch K1 " is closed；
step2：(in Fig. 2) shore electric power device starts idle voltage output and incrementally increases, until output rated voltage
(shore electric power voluntarily detects)；
step3：(in Fig. 2) " bank electricity exports switch Q2 " is closed, and connects the main isolating transformer of shipboard；
step4：(in Fig. 5 a or Fig. 5 b) gives " the main isolating transformer T3 of shipboard " to carry out by " the resistance R1 " of shore electric power
Gentle excitation；
step5：After the completion of (in Fig. 5 a or Fig. 5 b) " the main isolating transformer T3 of shipboard " excitation, it is closed in shore electric power
" shore electric power exports switch Q1 "；
step6：(in Fig. 5 a or Fig. 5 b) disconnects " shore electric power excitation contact-making switch K1 ", is realized normally for the shipboard of connection
Power supply.
Embodiment 2
In the present embodiment, as different from Example 1, the present invention is transformed switchgear therein, specifically, ginseng
See that Fig. 7, switchgear include the bank electricity output switch Q2 for the shutdown of final output voltage and current, further includes being opened with bank electricity output
Close the preliminary filling electrical circuit that Q2 is connected in parallel.Preliminary filling electrical circuit includes for carrying out encouraging for gentle excitation to the main isolating transformer of shipboard
Magnetic loop and the field switch whether to work for controlling energized circuit, energized circuit and field switch are connected in series with.This reality
It applies in example, preliminary filling electrical circuit includes resistance R2 and switchgear excitation contact-making switch K2.
In addition, the preliminary filling electrical circuit of the present embodiment is identical as the precharge loop structure in embodiment 1, extension is also identical,
Which is not described herein again.
Based on above system, the present invention also provides a kind of methods reducing excitation surge current, are used in shore-based power supply system, bank
Base power supply system includes the input isolating transformer T1 being sequentially connected in series, shore electric power device, output isolation transformer T2 and opens
Close cabinet；Wherein, switchgear includes the bank electricity output switch Q2 for the shutdown of final output voltage and current；This method includes：
step1：(in Fig. 1) " shore electric power exports switch Q1 " is if be closed --- and without Q1, this step is omitted；
step2：The device zero load of (in Fig. 1) shore electric power starts gradually output voltage and incrementally increases, until specified electricity
Pressure；
step3：(in Fig. 5 a or Fig. 5 b) connection main isolating transformer of shipboard, " switchgear excitation contact-making switch K2 " is closed；
step4：(in Fig. 5 a or Fig. 5 b) gives " the main isolating transformer T3 of shipboard " to be put down by " the resistance R2 " of switchgear
Slow excitation；
step5：After the completion of (in Fig. 5 a or Fig. 5 b) " the main isolating transformer T3 of shipboard " excitation, it is closed in shore electric power
" bank electricity exports switch Q2 "；
step 6：(in Fig. 4) disconnects " switchgear excitation contact-making switch K2 ", and normal power supply is realized for the shipboard of connection.
It using the method for the present invention and device, is transformed using existing equipment, without adding the transformer of complete set
Inrush phenomenon current-limiting apparatus has achieved the effect that reduce floor space, has saved cost.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
In vain, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (12)
1. a kind of shore-based power supply system comprising the shore electric power device and switchgear of concatenation；Wherein, the shore electric power device
Include the power conversion unit for connecting AC network, or include power conversion unit for connecting AC network and
The output switch being connect with the power conversion unit, the switchgear include being opened for being connected and turning off the output of bank electricity output
It closes；It is characterized in that：It further include the preliminary filling electrical circuit being connect with output switch in parallel；
The preliminary filling electrical circuit includes for carrying out the energized circuit of gentle excitation to the main isolating transformer of shipboard and for controlling
The field switch whether energized circuit processed works, energized circuit and field switch are connected in series with.
2. shore-based power supply system according to claim 1, it is characterised in that：The output of the preliminary filling electrical circuit and switchgear
Switch in parallel connects.
3. shore-based power supply system according to claim 1, it is characterised in that：The preliminary filling electrical circuit and shore electric power device
Output switch in parallel connection.
4. according to any shore-based power supply systems of claim 1-3, it is characterised in that：The preliminary filling electrical circuit includes concatenation
Resistance and mechanical switch.
5. according to any shore-based power supply systems of claim 1-3, it is characterised in that：The preliminary filling electrical circuit includes resistance
And electronic switch.
6. according to any shore-based power supply systems of claim 1-3, it is characterised in that：The preliminary filling electrical circuit is by PWM
The electronic switch of signal control is realized.
7. shore-based power supply system according to claim 5, it is characterised in that：The electronic switch includes at least one controllably
Electric drive device, electric drive device is thyristor, transistor, field-effect tube, silicon-controlled or relay.
8. according to claim 1-3 it is any the shore-based power supply system, it is characterised in that：The system further includes being connected to bank electricity
The input isolating transformer of supply unit input terminal.
9. according to claim 1-3 it is any the shore-based power supply system, it is characterised in that：The system further includes being connected to bank electricity
The output isolation transformer of supply unit output end.
10. a kind of method reducing excitation surge current, in shore-based power supply system, shore-based power supply system to include the bank electricity electricity of concatenation
Source device and switchgear；Wherein, the shore electric power device include power conversion unit for connecting AC network and with
The output switch of power conversion unit connection；It is characterized in that：This method includes：
In shore electric power device, a preliminary filling electrical circuit being connect with output switch in parallel is set, the preliminary filling electrical circuit includes
It energized circuit for carrying out gentle excitation to the main isolating transformer of shipboard and is encouraged for control whether energized circuit work
Magnetic switch, energized circuit and field switch are connected in series with；
When power supply, field switch is closed, and shore electric power device idle voltage output simultaneously incrementally increases, until output rated voltage；
The main isolating transformer of shipboard is connected, gentle excitation is carried out to the main isolating transformer of shipboard by energized circuit；
After the completion of the main isolating transformer excitation of shipboard, it is closed output switch, and disconnect field switch, is supplied for the shipboard of connection
Electricity.
11. a kind of method reducing excitation surge current, in shore-based power supply system, shore-based power supply system to include the bank electricity electricity of concatenation
Source device and switchgear；Wherein, the switchgear includes the output switch for being connected and turning off bank electricity output；Its feature exists
In：This method includes：
In switchgear, the preliminary filling electrical circuit that setting one is connect with bank electricity output switch in parallel, the preliminary filling electrical circuit includes using
In the excitation for carrying out the energized circuit of gentle excitation to the main isolating transformer of shipboard and whether working for controlling energized circuit
Switch, energized circuit and field switch are connected in series with；
When power supply, shore electric power device idle voltage output simultaneously incrementally increases, until output rated voltage；
The main isolating transformer of shipboard is connected, field switch is closed, is gently encouraged to the main isolating transformer of shipboard by energized circuit
Magnetic；
After the completion of the main isolating transformer excitation of shipboard, the bank electricity output switch of closure switch cabinet, and field switch is disconnected, for connection
Shipboard be powered.
12. the method according to claim 11 for reducing excitation surge current, it is characterised in that：The shore electric power device includes
Power conversion unit for connecting AC network and the output switch being connect with the power conversion unit, it is described to be pre-charged back
The output switch in parallel of road and switchgear connects, and when power supply, is first closed the output switch of the shore electric power device, then make bank electricity
Supply unit idle voltage output simultaneously incrementally increases, until output rated voltage.
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| CN201810381210.8A CN108390377A (en) | 2018-04-25 | 2018-04-25 | A kind of shore-based power supply system and the method for reducing excitation surge current |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742742A (en) * | 2019-03-07 | 2019-05-10 | 山东大学 | A kind of excitation surge current inhibition system and method based on nonlinear resistive element |
| CN112366961A (en) * | 2020-10-30 | 2021-02-12 | 株洲中车时代电气股份有限公司 | Power supply system of remote control underwater robot ROV and control method thereof |
| CN112421760A (en) * | 2020-11-26 | 2021-02-26 | 科华恒盛股份有限公司 | Method and device for controlling exciting current of UPS (uninterrupted Power supply) isolation transformer |
| CN116131348A (en) * | 2023-04-14 | 2023-05-16 | 澄瑞电力科技（上海）有限公司 | Box type mobile power supply starting grid-connected control method and system |
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| CN112366961A (en) * | 2020-10-30 | 2021-02-12 | 株洲中车时代电气股份有限公司 | Power supply system of remote control underwater robot ROV and control method thereof |
| CN112421760A (en) * | 2020-11-26 | 2021-02-26 | 科华恒盛股份有限公司 | Method and device for controlling exciting current of UPS (uninterrupted Power supply) isolation transformer |
| CN112421760B (en) * | 2020-11-26 | 2023-10-27 | 科华恒盛股份有限公司 | Method and device for controlling exciting current of UPS isolation transformer |
| CN116131348A (en) * | 2023-04-14 | 2023-05-16 | 澄瑞电力科技（上海）有限公司 | Box type mobile power supply starting grid-connected control method and system |
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