CN209102798U - DC current sampling apparatus and modular multilevel converter system - Google Patents
DC current sampling apparatus and modular multilevel converter system Download PDFInfo
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- CN209102798U CN209102798U CN201821689840.3U CN201821689840U CN209102798U CN 209102798 U CN209102798 U CN 209102798U CN 201821689840 U CN201821689840 U CN 201821689840U CN 209102798 U CN209102798 U CN 209102798U
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Abstract
The utility model embodiment discloses a kind of DC current sampling apparatus and modular multilevel converter system.The device includes: current detecting unit and converting unit；Current detecting unit includes multiple current detecting subelements in parallel, is respectively used to detect the electric current for flowing through partial high pressure bus rod in multiple current detecting subelements；Converting unit is connect with multiple current detecting subelements and valve control equipment respectively, for providing operating voltage for multiple current detecting subelements, and multiple current detecting subelements are detected that current signal is converted to voltage signal, and voltage signal adds up, the voltage signal after adding up is transferred to valve control equipment.DC current sampling apparatus provided by the embodiment of the utility model and modular multilevel converter system, multiple current detecting subelements respectively detect the electric current for flowing through partial high pressure bus rod, can carry out real-time sampling to electric current.
Description
Technical field
The utility model relates to power electronics field more particularly to a kind of DC current sampling apparatus and modularization are more
Level converter system.
Background technique
Currently, for the bridge of modularization multi-level converter (Modular Multilevel Converter, MMC) system
The current sample of arm mainly utilizes Hall current sensor to the electric current of high-tension cable bus rod or high pressure copper bar bus rod
Sampling, to improve current sample precision, save the cost.
As the power grade of valve control equipment is increasing, capacity is increasing, the outer diameter of high-tension cable and end
Parachute skirt is increasing, and the width and thickness of high pressure copper bar is increasing, and the internal diameter of Hall current sensor is smaller, makes
It cannot pass through Hall current sensor at high-tension cable bus rod or high pressure copper bar bus rod, and then can not achieve electric current
Real-time sampling.
Utility model content
The utility model embodiment provides a kind of DC current sampling apparatus and modular multilevel converter system, can
Real-time sampling is carried out to electric current.
On the one hand, the utility model embodiment provides a kind of DC current sampling apparatus, and device includes: current detecting unit
And converting unit；
Current detecting unit includes multiple current detecting subelements in parallel, and multiple current detecting subelements are respectively used to pair
The electric current for flowing through partial high pressure bus rod is detected；Wherein, high pressure bus rod is whole female by multiple portions high pressure confluence
Line parallel connection is constituted；
Converting unit is connect with multiple current detecting subelements and valve control equipment respectively, for being that multiple current detectings are single
Member provides operating voltage, and multiple current detecting subelements are detected that current signal is converted to voltage signal, and by voltage
Signal adds up, and the voltage signal after adding up is transferred to valve control equipment.
In one embodiment of the utility model, high pressure bus rod includes: high-tension cable bus rod or high pressure copper
Arrange bus rod.
In one embodiment of the utility model, high pressure bus rod includes: high-tension cable bus rod；
Converting unit includes: Switching Power Supply and Hall current collection plate；
Hall current collection plate is connect with Switching Power Supply, multiple current detecting subelements and valve control equipment respectively, and being used for will
The voltage of Switching Power Supply output is supplied to multiple current detecting subelements and multiple current detecting subelements is detected electric current
Signal is converted to voltage signal, and voltage signal is added up, and the voltage signal after adding up is transferred to valve control equipment.
In one embodiment of the utility model, high pressure bus rod includes: high pressure copper bar bus rod；
Converting unit includes: power supply subelement, isolating transformer, Switching Power Supply and Hall current collection plate；
The input terminal of isolating transformer is connect with power supply subelement, and the output end of isolating transformer is connect with Switching Power Supply,
For inputting the voltage by isolation to Switching Power Supply；
Hall current collection plate is connect with Switching Power Supply, multiple current detecting subelements and valve control equipment respectively, and being used for will
The voltage of Switching Power Supply output is supplied to multiple current detecting subelements and multiple current detecting subelements is detected electric current
Signal is converted to voltage signal, and voltage signal is added up, and the voltage signal after adding up is transferred to valve control equipment.
In one embodiment of the utility model, Hall current collection plate includes: voltage output subelement, multiple electric currents
To voltage conversion subunit and voltage accumulation subelement；
Voltage output subelement is connect with Switching Power Supply and multiple current detecting subelements respectively, for Switching Power Supply is defeated
Voltage out is supplied to multiple current detecting subelements；
Multiple electric currents to each of voltage conversion subunit electric current to voltage conversion subunit respectively with multiple electric currents
Each of detection sub-unit current detecting subelement is connected with voltage accumulation subelement, for examining electric current connected to it
It surveys the collected current signal of subelement and is converted to voltage signal, and voltage signal is sent to voltage accumulation subelement；
Voltage accumulation subelement is also connect with valve control equipment, for adding up to voltage signal, and will it is cumulative after electricity
Pressure signal is transferred to valve control equipment.
In one embodiment of the utility model, Hall current collection plate further include: electro-optic conversion subelement；
Electro-optic conversion subelement is connect with voltage accumulation subelement and valve control equipment respectively, for the voltage letter after adding up
Number optical signal transmission is converted to valve control equipment.
In one embodiment of the utility model, converting unit is connect with valve control equipment by optical fiber, is also used to tire out
Voltage signal after adding is converted to optical signal transmission to valve control equipment.
In one embodiment of the utility model, current detecting subelement includes: Hall current sensor.
On the other hand, the utility model embodiment provides a kind of modular multilevel converter system, modular multilevel
Inverter system includes DC current sampling apparatus provided by the embodiment of the utility model.
DC current sampling apparatus provided by the embodiment of the utility model and modular multilevel converter system, Duo Ge electricity
Stream detection sub-unit respectively detects the electric current for flowing through partial high pressure bus rod, can carry out real-time sampling to electric current.
Detailed description of the invention
It, below will be in the utility model embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Required attached drawing is briefly described, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 shows the first structural schematic diagram of DC current sampling apparatus provided by the embodiment of the utility model；
Fig. 2 shows second of structural schematic diagrams of DC current sampling apparatus provided by the embodiment of the utility model；
Fig. 3 shows the third structural schematic diagram of DC current sampling apparatus provided by the embodiment of the utility model；
Fig. 4 shows the 4th kind of structural schematic diagram of DC current sampling apparatus provided by the embodiment of the utility model；
Fig. 5 shows the 5th kind of structural schematic diagram of DC current sampling apparatus provided by the embodiment of the utility model；
Fig. 6 shows the flow diagram of the DC current method of sampling provided by the embodiment of the utility model.
Specific embodiment
The embodiments of the present invention is described in further detail with reference to the accompanying drawings and examples.Following embodiment
The detailed description and the accompanying drawings for illustratively illustrating the principles of the present invention, but cannot be used to limit the model of the utility model
It encloses, i.e., the utility model is not limited to described embodiment.
In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside", " bottom end ", " top
The orientation or positional relationship of the instructions such as end " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this reality
It is described with novel with simplified, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second " etc. are only used
In description purpose, it is not understood to indicate or imply relative importance.It also needs to illustrate in the description of the present invention,
It is unless specifically defined or limited otherwise, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be
It is fixedly connected, may be a detachable connection, or be integrally connected；It can be directly connected, it can also be by between intermediary
It connects connected.For the ordinary skill in the art, visual concrete condition understands above-mentioned term in the present invention
Concrete meaning.
Fig. 1 shows the first structural schematic diagram of DC current sampling apparatus provided by the embodiment of the utility model.Electricity
Flowing sampling apparatus 10 includes: current detecting unit 101 and converting unit 102.
Current detecting unit 101 includes multiple current detecting subelements 111 in parallel, multiple current detecting subelements 111
Each of current detecting subelement 111 be respectively used to detect the electric current for flowing through partial high pressure bus rod.
Wherein, high pressure bus rod is integrally made of multiple portions high pressure bus rod parallel connection.
Converting unit 102 is connect with multiple current detecting subelements 111 and valve control equipment 11 respectively, for being multiple electric currents
Detection sub-unit 111 provides operating voltage, and multiple current detecting subelements 111 are detected that current signal is converted to voltage
Signal, and voltage signal is added up, the voltage signal after adding up is transferred to valve control equipment 11.
Current sampling device provided by the embodiment of the utility model, multiple current detecting subelements are respectively to flowing through part height
The electric current of pressure bus rod is detected, and can carry out real-time sampling to electric current.
In one embodiment of the utility model, converting unit 102 can be connect with valve control equipment 11 by optical fiber, be turned
Unit 102 is changed to be also used to the voltage signal after adding up being converted to optical signal transmission to valve control equipment 11.
In one embodiment of the utility model, high pressure bus rod may include: high-tension cable bus rod or height
Press copper bar bus rod.
In one embodiment of the utility model, if high pressure bus rod includes high-tension cable bus rod.Due to height
The external insulation reliability of voltage cable is higher, can satisfy the requirement of electrical isolation, without the mode of power supply is isolated to multiple
Power supply needed for current detecting subelement 111 provides work.Based on this, converting unit 102 includes: Switching Power Supply 121 and Hall
Current acquisition plate 122.As shown in Fig. 2, Fig. 2 shows the second of DC current sampling apparatus provided by the embodiment of the utility model
Kind structural schematic diagram.
Hall current collection plate 122 respectively with Switching Power Supply 121, multiple current detecting subelements 111 and valve control equipment 11
Connection, the voltage for exporting Switching Power Supply 121 are supplied to multiple current detecting subelements 111 and by multiple current detectings
Subelement 111 detects that current signal is converted to voltage signal, and voltage signal is added up, the voltage signal after adding up
It is transferred to valve control equipment 11.
In one embodiment of the utility model, if high pressure bus rod includes high pressure copper bar bus rod.Due to height
Press the voltage of copper bar higher, external insulation reliability is poor, and it is impossible to meet the requirements of electrical isolation, it is therefore desirable to supply using isolation
Power supply needed for the mode of electricity provides work to multiple current detecting subelements 111.Based on this, converting unit 102 includes: switch
Power supply 121, Hall current collection plate 122, power supply subelement 123 and isolating transformer 124.As shown in figure 3, Fig. 3 shows this
The third structural schematic diagram for the DC current sampling apparatus that utility model embodiment provides.
The input terminal of isolating transformer 124 is connect with power supply subelement 123, the output end and switch of isolating transformer 124
Power supply 121 connects, for inputting the voltage by isolation to Switching Power Supply 121.
Hall current collection plate 122 respectively with Switching Power Supply 121, multiple current detecting subelements 111 and valve control equipment 11
Connection, the voltage for exporting Switching Power Supply 121 are supplied to multiple current detecting subelements 111 and by multiple current detectings
Subelement 111 detects that current signal is converted to voltage signal, and voltage signal is added up, the voltage signal after adding up
It is transferred to valve control equipment 11.
Illustratively, power supply subelement 123 to isolating transformer 124 input one without isolation voltage (for example,
220 volts of alternating currents (VAC)).Isolating transformer 124 exports the voltage (for example, isolation 220VAC) by isolation and extremely switchs
Power supply 121.At this point, Switching Power Supply 121 inputs the voltage (isolation 220VAC) by isolation, the output of Switching Power Supply 121 one
A voltage (for example, isolation 15 volts of direct currents (VDC)) by isolation is to Hall current collection plate 122.Hall current collection plate
122 export the voltage (isolation 15VDC) of the isolation to multiple current detecting subelements 111.Multiple current detecting subelements 111
The voltage (isolation 15VDC) for inputting isolation is started to work afterwards.
It can be improved the safety of current sampling device by isolating transformer.
In one embodiment of the utility model, Hall current collection plate 122 may include: voltage output subelement
1221, multiple electric currents are to voltage conversion subunit 1222 and voltage accumulation subelement 1223.It is below height with high pressure bus rod
It is illustrated for pressure copper bar bus rod.As shown in figure 4, Fig. 4 shows DC current provided by the embodiment of the utility model
4th kind of structural schematic diagram of sampling apparatus.
Voltage output subelement 1221 is connect with Switching Power Supply 121 and multiple current detecting subelements 111 respectively, and being used for will
The voltage that Switching Power Supply 121 exports is supplied to multiple current detecting subelements 111.
Multiple electric currents to each of voltage conversion subunit 1222 electric current to voltage conversion subunit 1222 respectively with
Each of multiple current detecting subelements 111 current detecting subelement 111 and voltage accumulation subelement 1223 connect, and are used for
The collected current signal of current detecting subelement 111 connected to it is converted into voltage signal, and voltage signal is sent
To voltage accumulation subelement 1223.
Voltage accumulation subelement 1223 is also connect with valve control equipment 11, for adding up to voltage signal, and will be added up
Voltage signal afterwards is transferred to valve control equipment 11.
In one embodiment of the utility model, Hall current collection plate 122 can also include: electro-optic conversion subelement
1224.It is illustrated so that high pressure bus rod is high pressure copper bar bus rod as an example further below.As shown in figure 5, Fig. 5 shows this
5th kind of structural schematic diagram of the DC current sampling apparatus that utility model embodiment provides.
Electro-optic conversion subelement 1224 is connect with voltage accumulation subelement 1223 and valve control equipment 11 respectively, for that will add up
Voltage signal afterwards is converted to optical signal transmission to valve control equipment 11.
It is understood that electro-optic conversion subelement 1224 is connect with valve control equipment 11 by optical fiber.
In one embodiment of the utility model, current detecting subelement 111 may include: Hall current sensor.
DC current sampling apparatus provided by the embodiment of the utility model, each of multiple Hall current sensors are suddenly
You only detect the electric current for flowing through partial high pressure bus rod current sensor, and partial high pressure bus rod is worn
Hall current sensor is crossed, real-time sampling can be carried out to electric current.
The utility model embodiment also provides a kind of modular multilevel converter system, modularization multi-level converter system
System includes DC current sampling apparatus provided by the embodiment of the utility model.
Modularization multi-level converter is cascaded by the identical submodule of multiple structures (Sub-module, SM) and is constituted.Usually
The system being made of modularization multi-level converter is referred to as modular multilevel converter system.
Based on foregoing description, the utility model embodiment also provides a kind of DC current method of sampling.The utility model is real
The DC current method of sampling for applying example offer utilizes DC current sampling apparatus provided by the embodiment of the utility model.Such as Fig. 6 institute
Show, Fig. 6 shows the flow diagram of the DC current method of sampling provided by the embodiment of the utility model.DC current sampling side
Method may include:
S601: the electric current for flowing through partial high pressure bus rod is examined respectively in multiple current detecting subelements in parallel
It surveys, and the current signal that will test is sent to converting unit.
Wherein, high pressure bus rod is integrally made of multiple portions high pressure bus rod parallel connection.
S602: the current signal that multiple current detecting subelements in parallel detect is converted to voltage and believed by converting unit
Number, and voltage signal is added up, the voltage signal after adding up is transferred to valve control equipment, to complete high pressure bus rod electricity
The sampling of stream.
In one embodiment of the utility model, converting unit detects multiple current detecting subelements in parallel
Current signal is converted to voltage signal, and voltage signal is added up, and the voltage signal after adding up is transferred to valve control equipment,
Include:
Multiple current detecting subelements are detected that current signal is converted to by the Hall current collection plate that converting unit includes
Voltage signal, and voltage signal is added up, the voltage signal after adding up is transferred to valve control equipment.
In one embodiment of the utility model, Hall current collection plate that converting unit includes is by multiple current detectings
Subelement detects that current signal is converted to voltage signal, and voltage signal is added up, and the voltage signal after adding up passes
It is defeated by valve control equipment, comprising:
Multiple electric currents that Hall current collection plate includes are to voltage conversion subunit respectively by current detecting connected to it
The collected current signal of subelement is converted to voltage signal, and voltage signal is sent to the electricity that Hall current collection plate includes
Press cumulative subelement；
Voltage accumulation subelement adds up to voltage signal, and will it is cumulative after voltage signal be transferred to valve control equipment.
In one embodiment of the utility model, the DC current method of sampling further include:
Voltage signal after the electro-optic conversion subelement that Hall current collection plate includes will add up is converted to optical signal transmission
To valve control equipment.
In one embodiment of the utility model, the DC current method of sampling further include:
Voltage signal after converting unit will add up is converted to optical signal transmission to valve control equipment.
The DC current method of sampling provided by the embodiment of the utility model, multiple current detecting subelements are respectively to flowing through portion
The electric current of point high pressure bus rod is detected, and can carry out real-time sampling to electric current.
Although the present utility model has been described by reference to the preferred embodiments, but in the model for not departing from the utility model
In the case where enclosing, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as not depositing
In structural conflict, items technical characteristic mentioned in the various embodiments be can be combined in any way.The utility model
It is not limited to specific embodiment disclosed herein, but is included all technical solutions falling within the scope of the claims.
Claims (9)
1. a kind of DC current sampling apparatus, which is characterized in that described device includes: current detecting unit and converting unit；
The current detecting unit includes multiple current detecting subelements in parallel, and the multiple current detecting subelement is used respectively
It is detected in the electric current for flowing through partial high pressure bus rod；Wherein, high pressure bus rod is whole high by multiple parts
Bus rod parallel connection is pressed to constitute；
The converting unit is connect with the multiple current detecting subelement and valve control equipment respectively, for being the multiple electric current
Detection sub-unit provides operating voltage, and the multiple current detecting subelement is detected that current signal is converted to voltage letter
Number, and the voltage signal is added up, the voltage signal after adding up is transferred to the valve control equipment.
2. DC current sampling apparatus according to claim 1, which is characterized in that the high pressure bus rod includes: height
Voltage cable bus rod or high pressure copper bar bus rod.
3. DC current sampling apparatus according to claim 2, which is characterized in that the high pressure bus rod includes: height
Voltage cable bus rod；
The converting unit includes: Switching Power Supply and Hall current collection plate；
The Hall current collection plate respectively with the Switching Power Supply, the multiple current detecting subelement and the valve control equipment
Connection, the voltage for exporting the Switching Power Supply are supplied to the multiple current detecting subelement and by the multiple electricity
Stream detection sub-unit detects that current signal is converted to voltage signal, and the voltage signal is added up, after cumulative
Voltage signal is transferred to the valve control equipment.
4. DC current sampling apparatus according to claim 2, which is characterized in that the high pressure bus rod includes: height
Press copper bar bus rod；
The converting unit includes: power supply subelement, isolating transformer, Switching Power Supply and Hall current collection plate；
The input terminal of the isolating transformer is connect with the power supply subelement, and the output end of the isolating transformer is opened with described
Powered-down source connection, for inputting the voltage by isolation to the Switching Power Supply；
The Hall current collection plate respectively with the Switching Power Supply, the multiple current detecting subelement and the valve control equipment
Connection, the voltage for exporting the Switching Power Supply are supplied to the multiple current detecting subelement and by the multiple electricity
Stream detection sub-unit detects that current signal is converted to voltage signal, and the voltage signal is added up, after cumulative
Voltage signal is transferred to the valve control equipment.
5. DC current sampling apparatus according to claim 3 or 4, which is characterized in that the Hall current collection plate packet
It includes: voltage output subelement, multiple electric currents to voltage conversion subunit and voltage accumulation subelement；
The voltage output subelement is connect with the Switching Power Supply and the multiple current detecting subelement respectively, is used for institute
The voltage for stating Switching Power Supply output is supplied to the multiple current detecting subelement；
The multiple electric current to each of voltage conversion subunit electric current to voltage conversion subunit respectively with it is the multiple
Each of current detecting subelement current detecting subelement is connected with the voltage accumulation subelement, for that will be connected thereto
The collected current signal of current detecting subelement be converted to voltage signal, and the voltage signal is sent to the voltage
Cumulative subelement；
The voltage accumulation subelement is also connect with the valve control equipment, for adding up to the voltage signal, and will be tired out
Voltage signal after adding is transferred to the valve control equipment.
6. DC current sampling apparatus according to claim 5, which is characterized in that the Hall current collection plate also wraps
It includes: electro-optic conversion subelement；
The electro-optic conversion subelement is connect with the voltage accumulation subelement and the valve control equipment respectively, for that described will tire out
Voltage signal after adding is converted to optical signal transmission to the valve control equipment.
7. DC current sampling apparatus according to claim 1, which is characterized in that the converting unit is set with the valve control
It is standby to be connected by optical fiber, it is also used to the voltage signal after described add up being converted to optical signal transmission to the valve control equipment.
8. DC current sampling apparatus according to claim 1, which is characterized in that the current detecting subelement is Hall
Current sensor.
9. a kind of modular multilevel converter system, which is characterized in that the modular multilevel converter system includes power
Benefit requires 1 to 8 described in any item DC current sampling apparatuses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821689840.3U CN209102798U (en) | 2018-10-17 | 2018-10-17 | DC current sampling apparatus and modular multilevel converter system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821689840.3U CN209102798U (en) | 2018-10-17 | 2018-10-17 | DC current sampling apparatus and modular multilevel converter system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239440A (en) * | 2018-10-17 | 2019-01-18 | 新疆金风科技股份有限公司 | DC current sampling apparatus, method and modular multilevel converter system |
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2018
- 2018-10-17 CN CN201821689840.3U patent/CN209102798U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239440A (en) * | 2018-10-17 | 2019-01-18 | 新疆金风科技股份有限公司 | DC current sampling apparatus, method and modular multilevel converter system |
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |
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