CN209102854U - A kind of detection system of MMC submodule - Google Patents
A kind of detection system of MMC submodule Download PDFInfo
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- CN209102854U CN209102854U CN201821490189.7U CN201821490189U CN209102854U CN 209102854 U CN209102854 U CN 209102854U CN 201821490189 U CN201821490189 U CN 201821490189U CN 209102854 U CN209102854 U CN 209102854U
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Abstract
The utility model discloses a kind of detection systems of MMC submodule, comprising: first detection unit, second detection unit, display unit and main control unit；The equal and described main control unit electrical connection of the first detection unit, the second detection unit, the display unit；The first detection unit, for detecting the running temperature of IGBT in MMC submodule；The second detection unit, for detecting the voltage value of capacitor in the MMC submodule；The main control unit triggers the display unit, so that the display unit shows the running temperature or the voltage value when being less than preset voltage thresholds greater than preset temperature threshold value or the voltage value for that ought determine the running temperature.The certificate authenticity for solving existing MMC submodule, which only determines whether, to break down, the source that failure specifically occurs and indefinite technical problem.
Description
Technical field
The utility model relates to technical field of electric power detection more particularly to a kind of detection systems of MMC submodule.
Background technique
Novel green renewable energy power generation has become the direction of electric system future development, such as water power, wind-powered electricity generation and light
Volt power generation, but since there are the restrictions of the factors such as geographical conditions and power generation characteristics for such generation mode, therefore exist in application aspect
Certain limitation.There is economy and reliability in terms of connecting with power grid in traditional UHV AC transmission technique.For this purpose,
Flexible DC transmission technology is largely promoted and applied as a kind of economic, flexible, high quality power transmission mode.Flexible direct current is defeated
Electrical engineering generally uses modularization multi-level converter (MMC), and entire inverter MMC submodule number is up to thousands of.MMC
The superiority and inferiority of the runnability of module is most important for the safe and reliable operation of flexible DC transmission engineering.Therefore, in MMC submodule
Before block puts into operation of power networks, exfactory inspection need to be carried out, the substandard products of performance difference is avoided to put into operation of power networks, to endanger power grid peace
Entirely.
It is at present the through-flow logical pressure of long-time to the check system of MMC submodule, if MMC after operation 168 hours
There is no failures to be considered as functional for module, can put into operation of power networks.But the method for inspection, only determine whether hair
Raw failure, the source that failure specifically occurs is simultaneously indefinite, so that staff can not exclude failure, thus into one
Step improves the utilization rate of MMC submodule.
Utility model content
The utility model provides a kind of detection system of MMC submodule, solves the reliability inspection of existing MMC submodule
It tests only to determine whether and break down, the source that failure specifically occurs and indefinite technical problem.
In view of this, the present invention provides a kind of detection systems of MMC submodule, comprising: first detection unit,
Two detection units, display unit and main control unit；
The equal and described main control unit of the first detection unit, the second detection unit, the display unit is electrically connected
It connects；
The first detection unit, for detecting the running temperature of IGBT in MMC submodule；
The second detection unit, for detecting the voltage value of capacitor in the MMC submodule；
The main control unit determines the running temperature greater than preset temperature threshold value or the voltage value for working as
When less than preset voltage thresholds, the display unit is triggered, so that the display unit shows the running temperature or voltage value.
Preferably, the system also includes alarm units；
The alarm unit and main control unit electrical connection；
The main control unit determines the running temperature greater than preset temperature threshold value or the voltage value for working as
When less than preset voltage thresholds, the alarm unit is triggered, so that the alarm unit issues alarm signal.
Preferably, the alarm unit specifically includes: the first alarm part-unit and/or the second alarm part-unit；
First alarm part-unit is combined aural and visual alarm；
Second alarm part-unit is GSM alarm module.
Preferably, the system also includes third detection units；
The third detection unit and main control unit electrical connection；
The third detection unit, for detecting the current value of the IGBT；
The main control unit, is also used to judge whether the current value is less than preset current threshold value.
Preferably, the third detection unit specifically includes: current acquisition subelement, the first A/D subelement, the first transmission
Subelement；
The current acquisition subelement, the first A/D subelement, first transmission subelement are sequentially connected, and institute
State the first transmission subelement and main control unit electrical connection.
Preferably, the first detection unit specifically includes: temperature acquisition subelement, the 2nd A/D subelement, the second transmission
Subelement；
The temperature acquisition subelement, the 2nd A/D subelement, second transmission subelement are sequentially connected, and institute
State the second transmission subelement and main control unit electrical connection.
Preferably, second acquisition unit specifically includes: voltage acquisition subelement, the 3rd A/D subelement module, third
Transmission subelement；
The voltage acquisition subelement, the 3rd A/D subelement module, the third transmission subelement are sequentially connected,
And the third transmission subelement and the main control unit are electrically connected.
Preferably, the system also includes storage units；
The storage unit and main control unit electrical connection.
As can be seen from the above technical solutions, the utility model has the advantage that
The utility model provides a kind of detection system of MMC submodule, comprising: first detection unit, the second detection are single
Member, display unit and main control unit；First detection unit, second detection unit, display unit are electrically connected with main control unit
It connects；First detection unit is used to detect the running temperature of IGBT in MMC submodule；Second detection unit is for detecting MMC submodule
The voltage value of capacitor in block；Main control unit is for when determining, running temperature to be greater than preset temperature threshold value or voltage value is less than
When preset voltage thresholds, display unit is triggered, so that display unit shows running temperature or voltage value.
The MMC submodule greater probability that breaks down is that capacitor or IGBT therein are damaged, therefore right in the utility model
The operation data of the two devices is detected, and judges the data detected, when the data detected are abnormal, aobvious
Specific abnormal data are shown on unit and, which are shown, in order to which staff carries out the exclusion of failure, solves existing MMC submodule
Certificate authenticity, which only determines whether, to break down, the source that failure specifically occurs and indefinite technical problem.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the detection system of the MMC submodule provided in the utility model；
Fig. 2 is that the detection system of a kind of MMC submodule provided in the utility model and the connection relationship of MMC submodule are shown
It is intended to；
Wherein, appended drawing reference is as follows:
1, main control unit；2, first detection unit；3, second detection unit；4, display unit；5, alarm unit；6,
Three detection units；7, storage unit.
Specific embodiment
The utility model provides a kind of detection system of MMC submodule, solves the reliability inspection of existing MMC submodule
It tests only to determine whether and break down, the source that failure specifically occurs and indefinite technical problem.
A kind of one embodiment of the detection system of the MMC submodule provided in the utility model embodiment, please specifically join
Read Fig. 1, comprising: first detection unit 2, second detection unit 3, display unit 4 and main control unit 1, first detection unit 2,
Second detection unit 3, display unit 4 are electrically connected with main control unit 1, first detection unit 2, for detecting MMC submodule
The running temperature of middle IGBT, second detection unit 3, for detecting the voltage value of capacitor in MMC submodule, main control unit 1 is used
In when determine running temperature and be less than preset voltage thresholds greater than preset temperature threshold value or voltage value, display unit 4 is triggered,
So that display unit 4 shows running temperature or voltage value.
It should be noted that the intuitive performance that the IGBT in MMC submodule is abnormal is temperature raising, therefore the present embodiment
In the running temperature of IGBT is detected.It should be noted simultaneously that being implemented without for 1 function of main control unit passes through journey
Sequence, such as: the judgement of voltage value and running temperature can be realized by way of setting electric current threshold value etc., a certain when determining
When data occur abnormal, it can be transmitted to display module by generating low and high level signal, trigger display module.
Further, first detection unit 2 specifically includes: temperature acquisition subelement, the 2nd A/D subelement, the second transmission
Subelement, temperature acquisition subelement, the 2nd A/D subelement, the second transmission subelement are sequentially connected, and the second transmission subelement and
Main control unit 1 is electrically connected.It is understood that as shown in Fig. 2, first detection unit 2 is mounted on the heat sink of IGBT,
Middle temperature collecting cell is specially patch type temperature acquisition sensor, in order to ensure the running temperature of acquisition is accurate, temperature
It acquires sensor and heat sink is in close contact.
Further, the second acquisition unit specifically includes: voltage acquisition subelement, the 3rd A/D subelement module, third pass
Defeated subelement, voltage acquisition subelement, the 3rd A/D subelement module, third transmission subelement are sequentially connected, and third transmission
Unit and main control unit 1 are electrically connected.It is understood that voltage acquisition subelement is specially Hall voltage sensor, such as Fig. 2
Shown, Hall voltage sensor is in parallel with MMC submodule.
It should be noted that the intuitive performance that the IGBT in MMC submodule is abnormal is temperature raising, therefore the present embodiment
In the running temperature of IGBT is detected.
The MMC submodule greater probability that breaks down is that capacitor or IGBT therein are damaged, therefore to this in the present embodiment
The operation data of two devices is detected, and judges that the data detected are being shown when the data detected are abnormal
Specific abnormal data are shown on unit 4, in order to which staff carries out the exclusion of failure, solve existing MMC submodule
Certificate authenticity, which only determines whether, to break down, the source that failure specifically occurs and indefinite technical problem.
The embodiment of the invention also provides a kind of embodiment two of the detection system of MMC submodule, embodiment two is being implemented
On the basis of example one, which further includes alarm unit 5, referring specifically to Fig. 1.
In the present embodiment, system further includes alarm unit 5, and alarm unit 5 and main control unit 1 are electrically connected, main control list
Member 1, for when determining running temperature and being less than preset voltage thresholds greater than preset temperature threshold value or voltage value, triggering alarm
Unit 5, so that alarm unit 5 issues alarm signal.
Further, alarm unit 5 specifically includes: the first alarm part-unit and/or the second alarm part-unit, the first alarm
Subelement is combined aural and visual alarm, and the second alarm part-unit is GSM alarm module.It is understood that combined aural and visual alarm issues report
Alert signal, to cause staff's note that simultaneously, when staff will leave the location of detection system, can beat
GSM alarm module is opened, is remotely monitored, when main control unit 1 detects that some detection data occurs abnormal, Ke Yitong
Cross the terminal that GSM alarm module sends exception information to staff.
In the present embodiment, by increasing the function of alarm unit 5, when the operation for detecting MMC submodule capacitor or switch
When data exception, alarm signal is issued, causes personnel's note that timely finding failure and excluding.
The embodiment of the invention also provides a kind of embodiment three of the detection system of MMC submodule, embodiment three is being implemented
On the basis of example one, which also has current detection function, referring specifically to Fig. 1.
In the present embodiment, system further includes third detection unit 6, and third detection unit 6 and main control unit 1 are electrically connected,
Third detection unit 6, for detecting the current value of IGBT, main control unit 1 is also used to judge whether current value is less than preset electricity
Flow threshold value.
Further, third detection unit 6 specifically includes: current acquisition subelement, the first A/D subelement, the first transmission
Subelement, current acquisition subelement, the first A/D subelement, the first transmission subelement are sequentially connected, and the first transmission subelement and
Main control unit 1 is electrically connected.It is understood that current acquisition subelement specifically: electronic direct-current current measuring device, such as
Shown in Fig. 2, electronic direct-current current measuring device is connected with MMC submodule.
IGBT in MMC submodule occur temperature increase it is larger may be because electric current is excessive caused by, therefore the present embodiment
The current value of IGBT is detected, once detecting that current value is more than preset current threshold value, the running temperature of IGBT can at this time
Preset temperature threshold value can be also less than, it is predicted that risk can take troubleshooting measure.
The embodiment of the invention also provides a kind of example IVs of the detection system of MMC submodule, and example IV is above-mentioned
On the basis of any embodiment, which also has storage unit 7, referring specifically to Fig. 1.
In the present embodiment, system further include: storage unit 7, storage unit 7 and main control unit 1 are electrically connected.Storage unit
7 are specifically used for the data that storage system detects, such as: running temperature and voltage value.
When the later period needing to search data or traced, it can use the data stored in storage unit 7 and carry out pair
The lookup or retrospect answered.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (7)
1. a kind of detection system of MMC submodule characterized by comprising first detection unit, second detection unit, third
Detection unit, display unit and main control unit；
The equal and described main control unit electrical connection of the first detection unit, the second detection unit, the display unit；
The first detection unit, for detecting the running temperature of IGBT in MMC submodule；
The second detection unit, for detecting the voltage value of capacitor in the MMC submodule；
The main control unit, for the running temperature to be greater than preset temperature threshold value or the voltage value is less than when determining
When preset voltage thresholds, the display unit is triggered, so that the display unit shows the running temperature or the voltage value；
The third detection unit and main control unit electrical connection；
The third detection unit, for detecting the current value of the IGBT；
The main control unit, is also used to judge whether the current value is less than preset current threshold value.
2. system according to claim 1, which is characterized in that the system also includes alarm units；
The alarm unit and main control unit electrical connection；
The main control unit, for the running temperature to be greater than preset temperature threshold value or the voltage value is less than when determining
When preset voltage thresholds, the alarm unit is triggered, so that the alarm unit issues alarm signal.
3. system according to claim 2, which is characterized in that the alarm unit specifically includes: the first alarm part-unit
And/or second alarm part-unit；
First alarm part-unit is combined aural and visual alarm；
Second alarm part-unit is GSM alarm module.
4. system according to claim 1, which is characterized in that the third detection unit specifically includes: current acquisition
Unit, the first A/D subelement, the first transmission subelement；
The current acquisition subelement, the first A/D subelement, first transmission subelement are sequentially connected, and described
One transmission subelement and main control unit electrical connection.
5. system according to any one of claim 1 to 4, which is characterized in that the first detection unit specifically includes:
Temperature acquisition subelement, the 2nd A/D subelement, the second transmission subelement；
The temperature acquisition subelement, the 2nd A/D subelement, second transmission subelement are sequentially connected, and described
Two transmission subelements and main control unit electrical connection.
6. system according to any one of claim 1 to 4, which is characterized in that the second detection unit specifically includes:
Voltage acquisition subelement, the 3rd A/D subelement module, third transmission subelement；
The voltage acquisition subelement, the 3rd A/D subelement module, the third transmission subelement are sequentially connected, and institute
State third transmission subelement and main control unit electrical connection.
7. system according to any one of claim 1 to 4, which is characterized in that the system also includes: storage unit；
The storage unit and main control unit electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821490189.7U CN209102854U (en) | 2018-09-12 | 2018-09-12 | A kind of detection system of MMC submodule |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821490189.7U CN209102854U (en) | 2018-09-12 | 2018-09-12 | A kind of detection system of MMC submodule |
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| CN209102854U true CN209102854U (en) | 2019-07-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557960A (en) * | 2020-12-31 | 2021-03-26 | 广东电网有限责任公司电力科学研究院 | MMC converter submodule open-circuit fault positioning method and device |
| CN113376460A (en) * | 2021-05-31 | 2021-09-10 | 西安交通大学 | Inverter monitoring system |
-
2018
- 2018-09-12 CN CN201821490189.7U patent/CN209102854U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557960A (en) * | 2020-12-31 | 2021-03-26 | 广东电网有限责任公司电力科学研究院 | MMC converter submodule open-circuit fault positioning method and device |
| CN113376460A (en) * | 2021-05-31 | 2021-09-10 | 西安交通大学 | Inverter monitoring system |
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