CN208190256U - A kind of shore-based power supply system - Google Patents
A kind of shore-based power supply system Download PDFInfo
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- CN208190256U CN208190256U CN201820599912.9U CN201820599912U CN208190256U CN 208190256 U CN208190256 U CN 208190256U CN 201820599912 U CN201820599912 U CN 201820599912U CN 208190256 U CN208190256 U CN 208190256U
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Abstract
The utility model discloses a kind of shore-based power supply system, 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 the field switch for carrying out the energized circuit of gentle excitation to the main isolating transformer of shipboard and whether working for controlling energized circuit, and energized circuit and field switch are connected in series.The utility model 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 utility model relates to a kind of shore-based power supply systems for reducing shipboard excitation surge current, are particularly suitable for ship bank base electricity
The high pressure of source domain is gone on board application environment.
Background technique
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), for voltage class needed for converting shore electric power for network voltage；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), the shutdown for 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 matching shore electric power for voltage class needed for ship.
In use, transformer never power-up state to power-up state, in order to establish magnetic field, necessarily has the mistake of an excitation
Journey.And if it is voltage rating is directly added, then the exciting current of an impact can be generated, 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 condition gone on board necessarily has a main transformer T3 (decompression become), 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 --- it is so exactly " transformer never power-up state to power-up state ".If not taking any arrange
It applies, then dash current is likely to be breached 3 times of rated current or more when bank side switchgear Q2 is attracted.
For the combined floodgate excitation surge current problem of bank electricity system, the 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.
Above-mentioned Transformer Close shove current-limiting apparatus have the drawback that needs individually increase a cabinet body, increase and account for
Ground area, and increase individually switch, it is at high cost.
Utility model content
The brief overview about the utility model embodiment is given below, in order to provide about the utility model
The basic comprehension of some aspects.It should be appreciated that outlined below is not the exhaustive general introduction about the utility model.It is not
It is intended to determine the key or pith of the utility model, nor intended limitation the scope of the utility model.Its purpose is only
It is to provide certain concepts in simplified form, taking this as a prelude to a more detailed description discussed later.
The application is transformed existing shore electric power equipment or switch cabinet equipment, closes without individually increasing transformer
The lock current-limiting apparatus that shoves can reach same purpose.
According to the one side of the application, a kind of shore-based power supply system is provided comprising the shore electric power device of concatenation and open
Close cabinet；Wherein, the shore electric power device includes the power conversion unit for connecting AC network, or including for connecting
The power conversion unit of AC network and the output connecting with power conversion unit switch, the switchgear includes for leading
The logical output with shutdown bank electricity output switchs；It wherein, 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 energized circuit
The field switch of no work, energized circuit and field switch are connected in series.
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.
In above scheme, 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 of pwm signal control, 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, including 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, makes resistance string entry loop, preset condition reaches
To after (such as to the predetermined time or reaching predeterminated voltage current value), excitation contact-making switch is disconnected, and resistance and circuit are disconnected,
So that shore-based power supply system is normally powered ship.
Using device described in the utility model, compared with prior art, it is only necessary to existing equipment is transformed, i.e., it is reachable
To same purpose, avoid the Transformer Close for the increasing complete set as before current-limiting apparatus that shoves (expensive and account for body
Product).Using the above scheme of the utility model, achieve the effect that reduce occupied area, saved cost, has had real well
The property used.
Detailed description of the invention
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 is the schematic diagram (band transformer) of improved shore electric power device in embodiment 1；
Fig. 5 b is the schematic diagram of improved shore electric power device in embodiment 1 (without transformer)；
Fig. 6 a is the first embodiment figure of preliminary filling electrical circuit；
Fig. 6 b is the second embodiment figure of preliminary filling electrical circuit；
Fig. 6 c is the third embodiment figure of preliminary filling electrical circuit；
Fig. 7 is the schematic diagram of improved switchgear in embodiment 2.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, it should be understood that term " first ", " second ", " third " are only used for describing
Purpose 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 " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
The utility model provides a kind of shore-based power supply system, is transformed, is not necessarily to existing shore-based power supply system equipment
Individually increasing the Transformer Close current-limiting apparatus that shoves can reach same purpose；It avoids increasing complete set as before
Transformer Close 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；When work, field switch closure, shore electric power device zero load
Output voltage simultaneously incrementally increases, and until output rated voltage, then switchgear is closed, and 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 above scheme, 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, resistance and circuit 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 is disconnected, 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 ", practical there are also a variety of implementations such as IGBT, GTO.Electronic switch in Fig. 6 b be it is constantly on, it is " slow by resistance
Punching "；And in Fig. 6 c, it is by way of electronic switch Discontinuous Conduction come " buffering ".
Such as preliminary filling electrical circuit is realized by the electronic switch of pwm signal control 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.
Embodiment 2
In the present embodiment, unlike the first embodiment, the utility model is transformed switchgear therein, specifically
, referring to Fig. 7, switchgear includes exporting switch Q2 for the bank electricity of the shutdown of final output voltage and current, further includes and bank electricity
The preliminary filling electrical circuit that output switch Q2 is connected in parallel.Preliminary filling electrical circuit includes for gently being encouraged to the main isolating transformer of shipboard
The energized circuit of magnetic and the field switch whether to work for controlling energized circuit, energized circuit and field switch series connection connect
It connects.In the present embodiment, 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.
It using the device of the utility model, is transformed using existing equipment, without adding the transformer of complete set
Inrush phenomenon current-limiting apparatus has achieved the effect that reduce occupied area, has saved cost.
Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered
This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details
On the utility model can be made a variety of changes, be the protection scope of the utility model.
Claims (9)
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
Including the power conversion unit for connecting AC network, or include power conversion unit for connecting AC network and
The output switch connecting with the power conversion unit, the switchgear include opening for being connected and turning off the output of bank electricity output
It closes；It is characterized by also including the preliminary filling electrical circuits connecting 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.
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 connection.
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. shore-based power supply system according to claim 1 to 3, it is characterised in that: the preliminary filling electrical circuit includes concatenation
Resistance and mechanical switch.
5. shore-based power supply system according to claim 1 to 3, it is characterised in that: the preliminary filling electrical circuit includes resistance
And electronic switch.
6. shore-based power supply system according to claim 1 to 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. -3 any shore-based power supply system according to claim 1, it is characterised in that: the system further includes being connected to bank electricity
The input isolating transformer of power supply device input terminal.
9. -3 any shore-based power supply system according to claim 1, it is characterised in that: the system further includes being connected to bank electricity
The output isolation transformer of power supply device output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820599912.9U CN208190256U (en) | 2018-04-25 | 2018-04-25 | A kind of shore-based power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820599912.9U CN208190256U (en) | 2018-04-25 | 2018-04-25 | A kind of shore-based power supply system |
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| CN208190256U true CN208190256U (en) | 2018-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390377A (en) * | 2018-04-25 | 2018-08-10 | 深圳市禾望电气股份有限公司 | A kind of shore-based power supply system and the method for reducing excitation surge current |
-
2018
- 2018-04-25 CN CN201820599912.9U patent/CN208190256U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390377A (en) * | 2018-04-25 | 2018-08-10 | 深圳市禾望电气股份有限公司 | A kind of shore-based power supply system and the method for reducing excitation surge current |
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