CN208849448U - A kind of converter plant with failure protection function - Google Patents
A kind of converter plant with failure protection function Download PDFInfo
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- CN208849448U CN208849448U CN201821591441.3U CN201821591441U CN208849448U CN 208849448 U CN208849448 U CN 208849448U CN 201821591441 U CN201821591441 U CN 201821591441U CN 208849448 U CN208849448 U CN 208849448U
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Abstract
The utility model discloses a kind of converter plant with failure protection function; including current transformer; it further include the protection circuit being connected in parallel with current transformer; protection circuit includes the switch unit and energy process unit being connected in series; energy process unit includes the energy storage circuit being connected in parallel and energy consumption circuit; when current transformer breaks down; access protection circuit; bypass current transformer is controlled by switch unit, and energy stores, energy consumption circuit progress energy consumption are carried out by energy storage circuit.The utility model has many advantages, such as that structure is simple, at low cost, error protection performance is good, safe and reliable.
Description
Technical field
The utility model relates to converter topology field more particularly to a kind of converter plants with failure protection function.
Background technique
Power module is made of the electronic switches component such as IGBT in converter plant, and typical converter plant main circuit is such as
Shown in Fig. 1, the power module of the left and right sides shares an intermediate dc circuit, stores energy by capacitor in intermediate dc circuit
Amount, such converter plant can make intermediate DC loop positive and negative anodes instantaneous short circuit when component failure occur causes bridge arm to run through,
The energy of power supply system, the energy of converter plant intermediate loop capacitor storage, non-resistive load storage inside energy just can only
It is discharged within a very short time by failure bridge arm, the short circuit current of the generation is very big, that is, generates very big transient state short-circuit current, short circuit
Electric current is more than that the maximum short circuit current of IGBT device being resistant to can make the serious scaling loss of IGBT device, when more serious
It can make failure propagation, and then influence the normal operation of converter device other component.
Power module fault secure circuit is not separately provided in converter plant in the prior art, and due to all power modules
Positive and negative anodes be all connection, it is easy to cause the energy (power grid, motor, Support Capacitor and secondary capacitor) of electrical system all to
Malfunctioning module pours in, and causes power module that serious scaling loss damage occurs；Meanwhile power module damage also easily causes centre straight
Road short trouble is flowed back to, can only will lose the power of a bogie at this time by the power module of the entire bogie of block,
So that the availability of locomotive also drops significantly, especially in shipping field, above situation is possible to will lead at any time to be short of power, even
Cause machine broken.
Utility model content
The technical problems to be solved in the utility model is that for technical problem of the existing technology, this is practical new
Type provides the unsteady flow dress with failure protection function that a kind of structure is simple, at low cost, error protection performance is good, safe and reliable
It sets.
In order to solve the above technical problems, the utility model proposes technical solution are as follows:
A kind of converter plant with failure protection function, including current transformer further include being connected in parallel with the current transformer
Protection circuit, it is described protection circuit include be connected in series switch unit and energy process unit, the energy process list
Member includes the energy storage circuit being connected in parallel and energy consumption circuit, when the current transformer breaks down, described in access
Protect circuit, the current transformer bypassed by switch unit control, and by the energy storage circuit carry out energy stores,
The energy consumption circuit carries out energy consumption.
As further improvement of the utility model: the switch unit includes a thyristor switch or two inverse parallels
The thyristor switch of connection.
As further improvement of the utility model: the energy storage circuit includes an inductance component or the energy
Amount storage circuit includes more than two inductance components being connected in series or in parallel or the energy storage circuit includes three or more
The inductance component connected in series and parallel.
As further improvement of the utility model: the energy consumption circuit includes a resistance device or the energy
Amount consumption circuit includes more than two resistance devices being connected in series or in parallel or the energy consumption circuit includes three or more
The resistance device connected in series and parallel.
As further improvement of the utility model: the centre in the input side of the current transformer and/or the current transformer
DC loop side is provided with the protection circuit.
As further improvement of the utility model: the outlet side of the current transformer is provided with the protection circuit.
As further improvement of the utility model: the protection circuit includes the protection branch of two-way more parallel connection
Road, protection branch described in every road includes the switch unit and energy process unit being connected in series.
As further improvement of the utility model: further including the failure respectively with the current transformer, protection circuit connection
Detection unit, for acquiring the electric current and/or voltage signal of the current transformer, when determining electric current and/or voltage signal is greater than
When specified threshold, determine that the current transformer breaks down, switch unit is in the control connection protection circuit to bypass the change
Flow device.
As further improvement of the utility model: the energy storage circuit, energy consumption circuit pass through one respectively
Control switch is connect with the switch unit.
As further improvement of the utility model: the current transformer includes sequentially connected rectification unit, intermediate dc
Circuit and inversion unit, the rectification unit accesses power supply and is transformed to direct current, by the intermediate dc circuit
It exports to the inversion unit, the inversion unit exports after the direct current of input is converted to alternating current.
Compared with the prior art, the advantages of the utility model are: the utility model has the unsteady flow of failure protection function
Device, by being arranged in parallel a protection circuit, protection circuit setting switch unit and energy process unit for current transformer, when
Access protection circuit, bypass current transformer are controlled by switch unit when current transformer breaks down, allow in failure in time,
Cutting current transformer rapidly, and energy storage circuit and energy consumption circuit are provided in energy process unit simultaneously, access is protected
When protection circuit, the storage and consumption of energy can be realized simultaneously by energy storage circuit, energy consumption circuit, it can be by event
Power supply system energy when barrier, the energy of the intermediate loop capacitor storage in current transformer and energy of non-resistive load storage etc. pass through
Storage and release two ways are handled, and avoid trouble unit that the expansion of serious scaling loss and fault coverage occurs, while can
To realize making full use of for energy.
Detailed description of the invention
Fig. 1 is the principle schematic diagram of typical converter plant main circuit.
Fig. 2 is the principle schematic diagram for the converter plant that the utility model embodiment 1 has failure protection function.
Fig. 3 is the structural schematic diagram of the switch unit used in the utility model embodiment 1.
Fig. 4 is the concrete structure schematic diagram for the converter plant that the utility model embodiment 2 has failure protection function.
Fig. 5 is the concrete structure schematic diagram for the converter plant that the utility model embodiment 3 has failure protection function.
Marginal data: 1, current transformer；11, rectification unit；12, intermediate dc circuit；13, inversion unit；2, circuit is protected；
21, switch unit；22, energy process unit；221, energy storage circuit；222, energy consumption circuit.
Specific embodiment
The utility model is further described below in conjunction with Figure of description and specific preferred embodiment, but not because
This and limit the protection scope of the utility model.
Embodiment 1:
As shown in Fig. 2, it includes current transformer 1 that the present embodiment, which has the converter plant of failure protection function, further include and unsteady flow
The protection circuit 2 that device 1 is connected in parallel, protection circuit 2 include the switch unit 21 and energy process unit 22 being connected in series, energy
Amount processing unit 22 includes the energy storage circuit 221 being connected in parallel and energy consumption circuit 222, when event occurs for current transformer 1
When barrier, access protection circuit 2 controls bypass current transformer 1 by switch unit 21, and carries out energy by energy storage circuit 221
Storage energy consumes circuit 222 and carries out energy consumption.
The present embodiment by being arranged in parallel a protection circuit 2 for current transformer 1, protection circuit 2 be arranged switch unit 21 with
And energy process unit 22, when current transformer 1 breaks down, such as when generation IGBT semiconductor device failure, opened by closure
Unit 21 is closed to access protection circuit 2, bypass current transformer 1, allows to timely, the cutting current transformer 1, and energy rapidly in failure
Energy storage circuit 221 and energy consumption circuit 222 are provided in amount processing unit 22 simultaneously, when circuit 2 is protected in access, is led to
Cross energy storage circuit 221, energy consumption circuit 222 can be realized simultaneously the storage and consumption of energy, when can be by failure
Energy and the energy of non-resistive load storage of intermediate loop capacitor storage in power supply system energy, current transformer 1 etc., which pass through, to be deposited
Storage and release two ways are handled, and avoid trouble unit that the expansion of serious scaling loss and fault coverage occurs, and will not be right
Other devices have an impact in device, while making full use of for energy may be implemented.
The above-mentioned protection circuit 2 of the present embodiment is by the control of switch unit 21 access or excision, when current transformer 1 is working properly
When, switch unit 21 disconnects, that is, protects circuit 2 not work, do not influence the normal operation of current transformer 1；When current transformer 1 breaks down
When, 21 rapid closing of switch unit accesses the protection circuit 2 work.
As shown in figure 3, the present embodiment switch unit 21 can use a thyristor switch (such as Fig. 3 (a)), wherein unsteady flow
The anode of device 1 is connect with the anode of thyristor, and the cathode of thyristor is connect with one end of energy process unit 22, energy process list
The other end of member 22 is connect with the cathode of protection circuit 2；Due to the characteristic of thyristor unilateal conduction, switch unit 21 can also be with
The thyristor switch (such as Fig. 3 (b)) connected using two inverse parallels is carried out reversely simultaneously with two duplicate thyristors
Connection, wherein one end of thyristor switch is connect with the anode of protection circuit 2, and one end of other end and energy process unit 22 connects
It connects, and the other end of energy process unit 22 is connect with the cathode of protection circuit 2.
In the present embodiment, energy storage circuit 221 can be realized using an inductance component, can also be using two or more
Inductance component according to being connected in series or in parallel to obtain, can also using three or more inductance components into series-parallel connect obtain,
I.e. each inductance component carries out parallel connection after being connected again, can specifically be selected according to the demand of practical energy storage energy size etc., can also
To realize energy storage using other devices, structure.
In the present embodiment, energy consumption circuit 222 can be realized using a resistance device, can also be using two or more
Resistance device is connected in series or in parallel to obtain, and can also be connected in series and parallel and be obtained using three or more resistance devices, i.e., each electricity
Resistance device carries out parallel connection after being connected again, can specifically be selected, can also be used according to the demand of actual consumption energy size etc.
Other devices, structure realize energy consumption.
In the present embodiment, energy storage circuit 221, energy consumption circuit 222 pass through a control switch and switch respectively
Unit 21 connects, and controls the access of energy storage circuit 221, energy consumption circuit 222 respectively by corresponding control switch,
Allow to select whether energy stores, energy consumption execute according to actual needs.
In the present embodiment, specifically protection circuit 2 can be set in input side, the intermediate dc circuit side position of current transformer 1,
It is provided in input side, that is, the input terminal of rectification side power module is set, can isolate out failure in input side, keep away
Exempt from the further diffusion of failure, be arranged at intermediate dc circuit side, that is, is arranged in intermediate dc circuit, is returned with intermediate dc
Road is connected in parallel, and energy in device can be stored and be consumed rapidly in device failure, can also be in current transformer
1 outlet side setting protection circuit 2, i.e., in the output end setting protection circuit 2 of inverter side power module, protection circuit 2 is set
Setting can specifically set according to actual needs.
In the present embodiment, protection circuit 2 includes the protection branch of two-way more parallel connection, and every road protection branch includes
The switch unit 21 and energy process unit 22 of series connection, by multiplexing protective circuit 2 can realize bigger energy storage and
Consumption, while redundancy feature being provided, when there is protection 2 failure of circuit all the way, it will not influence the error protection function of whole device
Energy.Access switch can be further set in every protection branch, by the access of each item protection branch of access switch control.
In the present embodiment, further includes the fault detection unit being connect respectively with current transformer 1, protection circuit 2, become for acquiring
The electric current and/or voltage signal for flowing device 1 determine current transformer 1 when determining electric current and/or voltage signal is greater than specified threshold
It breaking down, switch unit 21 in protection circuit 2 is connected in control may be implemented automatic fault protection function to bypass current transformer 1,
When the device faults such as IGBT occur, protection circuit 2 can be automatically cut rapidly, further increases the security reliability of device
Energy.
Embodiment 2:
As shown in figure 4, the present embodiment is substantially the same manner as Example 1, difference is that circuit 2 is protected to be specifically located at current transformer
1 input side, current transformer 1 specifically includes sequentially connected rectification unit 11, intermediate dc circuit 12 and inversion unit 13, whole
Stream unit 11 accesses power supply and is transformed to direct current, exports by intermediate dc circuit 12 to inversion list 13, inversion unit
13 the direct current of input is converted into alternating current after export, intermediate dc circuit 12 use filter capacitor storage energy.
The present embodiment is by being arranged protection circuit in input side, and when IGBT device failure occurs for power module, control is protected
Switch unit 21 in protection circuit 2 is open-minded rapidly, and power supply system is bypassed, and cuts off the power supply of current transformer 1, until power supply system
The energy of the breaker tripping of system, power supply system will not enter converter plant, the energy of power supply system, filter capacitor storage energy
It is stored and is consumed by energy process unit 22 with non-resistive load storage energy, can substantially reduce failure influences model
It encloses, reduces the influence to device in current transformer 1.
Embodiment 3:
As shown in figure 5, the present embodiment is substantially the same manner as Example 1, difference is input side and centre in current transformer 1
DC side is provided with protection circuit 2 simultaneously, and twin failure protection may be implemented, and to be formed when power module generation IGBT device fails
Input side protection circuit 2, intermediate dc side protection circuit 2 are accessed when bridge arm runs through, and confession is realized by dual protection circuit 2
The storage and consumption of electric system energy, filter capacitor storage energy and non-resistive load storage energy etc., can quickly be handled
The big energy generated, so that huge short circuit current will not be generated in failure bridge arm, in IGBT device generating overcurrent
Within the short circuit current being resistant to, guarantees that device is not damaged, further increase the error protection performance of converter plant, guarantee
The operational reliability of converter plant.
The preferred embodiment of above-mentioned only the utility model, does not impose any limitation on the present invention.Though
So the utility model has been disclosed with preferred embodiment as above, however is not intended to limit the utility model.Therefore, it is all without departing from
The content of technical solutions of the utility model any is simply repaired according to the utility model technical spirit is made to the above embodiment
Change, equivalent variations and modification, should all fall in the range of technical solutions of the utility model protection.
Claims (10)
1. a kind of converter plant with failure protection function, including current transformer (1), which is characterized in that further include and the change
The protection circuit (2) that stream device (1) is connected in parallel, protection circuit (2) include the switch unit (21) and energy being connected in series
It measures processing unit (22), the energy process unit (22) includes that the energy storage circuit (221) being connected in parallel and energy disappear
The protection circuit (2) is accessed, by the switch unit (21) when the current transformer (1) breaks down in power consumption road (222)
Control bypasses the current transformer (1), and carries out energy stores, energy consumption electricity by the energy storage circuit (221)
Road (222) carries out energy consumption.
2. the converter plant according to claim 1 with failure protection function, it is characterised in that: the switch unit
(21) include a thyristor switch or two inverse parallels connection thyristor switch.
3. the converter plant according to claim 1 with failure protection function, it is characterised in that: the energy stores electricity
Road (221) includes an inductance component or the energy storage circuit (221) includes more than two electricity being connected in series or in parallel
Inductor component or the energy storage circuit (221) include three or more the inductance components connected in series and parallel.
4. the converter plant according to claim 1 with failure protection function, it is characterised in that: the energy consumption electricity
Road (222) includes a resistance device or the energy consumption circuit (222) includes more than two electricity being connected in series or in parallel
It hinders device or the energy consumption circuit (222) includes three or more the resistance devices connected in series and parallel.
5. with the converter plant of failure protection function described according to claim 1~any one of 4, it is characterised in that:
The input side of the current transformer (1) and/or the intermediate dc circuit side in the current transformer (1) are provided with the protection circuit
(2)。
6. the converter plant according to claim 5 with failure protection function, it is characterised in that: the current transformer (1)
Outlet side be provided with the protection circuit (2).
7. with the converter plant of failure protection function described according to claim 1~any one of 4, it is characterised in that:
Protection circuit (2) includes the protection branch of two-way more parallel connection, and protection branch described in every road includes being connected in series
The switch unit (21) and energy process unit (22).
8. with the converter plant of failure protection function described according to claim 1~any one of 4, it is characterised in that:
It further include the fault detection unit being connect respectively with the current transformer (1), protection circuit (2), for acquiring the current transformer (1)
Electric current and/or voltage signal determine the current transformer (1) when determining electric current and/or voltage signal and being greater than specified threshold
It breaks down, switch unit (21) is in the control connection protection circuit (2) to bypass the current transformer (1).
9. with the converter plant of failure protection function described according to claim 1~any one of 4, it is characterised in that:
The energy storage circuit (221), energy consumption circuit (222) pass through a control switch and the switch unit (21) respectively
Connection.
10. with the converter plant of failure protection function described according to claim 1~any one of 4, it is characterised in that:
The current transformer (1) includes sequentially connected rectification unit (11), intermediate dc circuit (12) and inversion unit (13), described
Rectification unit (11) access power supply is simultaneously transformed to direct current, exports by the intermediate dc circuit (12) to the inversion
Unit (13), the inversion unit (13) export after the direct current of input is converted to alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821591441.3U CN208849448U (en) | 2018-09-28 | 2018-09-28 | A kind of converter plant with failure protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821591441.3U CN208849448U (en) | 2018-09-28 | 2018-09-28 | A kind of converter plant with failure protection function |
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| Publication Number | Publication Date |
|---|---|
| CN208849448U true CN208849448U (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821591441.3U Active CN208849448U (en) | 2018-09-28 | 2018-09-28 | A kind of converter plant with failure protection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749840A (en) * | 2019-11-27 | 2020-02-04 | 珠海格力电器股份有限公司 | Detection method and device for improving safety of converter and converter |
-
2018
- 2018-09-28 CN CN201821591441.3U patent/CN208849448U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749840A (en) * | 2019-11-27 | 2020-02-04 | 珠海格力电器股份有限公司 | Detection method and device for improving safety of converter and converter |
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