CN202817721U - Marine high-power AC-DC (alternating current-direct current) converter based on thyristor - Google Patents
Marine high-power AC-DC (alternating current-direct current) converter based on thyristor Download PDFInfo
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- CN202817721U CN202817721U CN2012202623291U CN201220262329U CN202817721U CN 202817721 U CN202817721 U CN 202817721U CN 2012202623291 U CN2012202623291 U CN 2012202623291U CN 201220262329 U CN201220262329 U CN 201220262329U CN 202817721 U CN202817721 U CN 202817721U
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Abstract
The utility model relates to the field of industrial instruments and meters, specifically to a marine high-power AC-DC (alternating current-direct current) converter based on a thyristor, which is high in protection speed and various in mode. A current transformer and a voltage transformer are connected to each output end of the alternating current side of the AC-DC converter; the current transformer and the voltage transformer are connected with the input end of an electronic protection control board, and used for inputting signals to the electronic protection control board; and the electronic protection control board is used for monitoring circuit faults in real time, and controlling a protection switch and an alarm buzzer. Compared with the prior art, more comprehensive monitoring is performed on the fault modes of short circuit, overvoltage, overload, overcurrent, open phase and the like; and more accurate and rapid protection is performed on the AC-DC converter by applying a protection mode of coordinating the electronic protection control board with protection components.
Description
Technical field
The utility model relates to the industrial instruments field, is specifically related to a kind of fast, various informative peculiar to vessel high-power AC-DC converter based on thyristor of speed of protecting.
Background technology
The AC-DC converter is operated in the high-power environment, and it is inevitable breaking down.The traditional AC-DC converter protecting apparatus of China consists of relatively simple; the fault type of protection is just protected overcurrent, overvoltage and short circuit, and the protection instrument of employing also just adopts the elements such as fast acting fuse, piezo-resistance, capacitance-resistance buffer to protect.Traditional protective device can't be monitored real-time electric current and voltage value, can't check accurately overvoltage and overcurrent value when breaking down.Therefore traditional protective device can't be protected the AC-DC converter very accurately, can only estimate by rule of thumb.
In metallurgical branch's 2008 nd Annual Meeting collection " the thyristor rectifier current supply circuit protecting circuit designed " document of China metering association, disclose a kind of reason that the overvoltage of thyristor rectifier DC power-supply system, overcurrent are produced and carried out simple analysis, and designed counter-measure.
Its formation is relatively simple; with fast acting fuse it to be protected in the protection bridge to overcurrent; bridge adopts electronic circuit protection outward, and namely Current Transformer generates current signal and through trigger control relay switch it carried out overcurrent protection generating the overcurrent triggering signal through over-voltage comparator converting voltage signal to.Overvoltage protection is adopted the devices such as lightning arrester, piezo-resistance, RC resistance-capacitance absorption protect.Its shortcoming is that operating personnel can't monitor real-time electric current and voltage value, and can't protect phase shortage.
Summary of the invention
The purpose of this utility model is to provide a kind of and protects that speed is more timely, protected species is more based on the peculiar to vessel high-power AC-DC converter of thyristor.
The purpose of this utility model is achieved in that
A kind of peculiar to vessel high-power AC-DC converter based on thyristor; each output of AC-DC converter AC connects a current transformer and a voltage transformer; current transformer, voltage transformer are connected with Electronic Protection control board input respectively; to Electronic Protection control board input signal; Electronic Protection control board Real-Time Monitoring fault, control protection switch and alarm buzzer.
The Electronic Protection control board is by the sampled signal processing module; analog-to-digital conversion module; the CPU module; LCD MODULE; photoelectric isolation module; switching value output module and alarm buzzer form; the transducer collection signal is sent to the sampled signal processing module; the sampled signal processing module changes signal in proportion into the signal that satisfies the analog-to-digital conversion module standard for manual sampling and sends analog-to-digital conversion module to carries out analog-to-digital conversion; the CPU module is obtained the laggard row operation of signal that analog-to-digital conversion module transmits; compare with the electric current and voltage rated value; comparative result is sent to photoelectric isolation module; output signal was finished overload to the switching value input/output module by switching value input/output module control relay switch shape after photoelectric isolation module drove optocoupler; overvoltage; the warning of overcurrent and phase shortage and protection.
Also comprise piezo-resistance and resistance-capacitance absorption loop, in three piezo-resistances of the star-like connection in each overvoltage place of AC-DC converter AC, each thyristor in AC-DC converter rectifier bridge resistance-capacitance absorption loop in parallel is in the DC side of an AC-DC converter piezo-resistance in parallel with load.
Also comprise protection switch and fast acting fuse, at every inlet wire series connection protection switch of installing and fast acting fuse of AC-DC converter AC, at fast acting fuse of positive pole series connection of the DC side load of AC-DC converter.
Current transformer and voltage transformer are in parallel or be connected on AC-DC converter AC output.
The sampled signal processing module is comprised of voltage follower concatenation operation comparator, with the pro rata signal that satisfies the analog-to-digital conversion module standard for manual sampling that is transformed into of input signal.
Switching value output module connects relay by triode and forms, and input signal makes the triode conducting, is come warning and the protection of completing circuit by triode control relay on off state.
The beneficial effects of the utility model are:
Compared with prior art; the failure modes such as short circuit, overvoltage, overload, overcurrent, phase shortage have been carried out more fully monitoring; the protected mode that applying electronic protection control board and protection components and parts match makes the AC-DC converter obtain protecting more quickly and accurately.
Description of drawings
Fig. 1 is a kind of peculiar to vessel high-power AC-DC converter figure based on thyristor of the present invention;
Fig. 2 is Electronic Protection control board hardware module figure of the present invention;
Fig. 3 is Electronic Protection control board hardware module figure.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiments the utility model is further described.
Embodiment one:
The global design of 12 pulse waves high-power AC-DC converter peculiar to vessel and protection configuration see also Fig. 1.The utility model the first embodiment provides a kind of 12 pulse waves based on thyristor high-power AC-DC converter peculiar to vessel.This AC-DC converter is comprised of 12 pulse wave AC-DC converters, fast acting fuse, piezo-resistance, capacitance-resistance buffer, transducer (current-voltage transformer), Electronic Protection control board, protection switch and alarm buzzer.The Electronic Protection control board is comprised of signal sampling processing module, analog-to-digital conversion module, CPU module, photoelectric isolation module, switching value output module, signal display module; can realize that the components and parts of these functions of modules and chips welding on a circuit board, have formed the Electronic Protection control board.Play good protection during the faults such as the short circuit that this part runs at work to the AC-DC converter, overcurrent, overload, overvoltage and phase shortage.
Short-circuit protection is divided in AC-DC converter AC, the bridge and three aspects of DC side in the present embodiment, at AC-DC converter AC, that quantity is 6 altogether, and installs respectively protection switch at every inlet wire series connection installing fast acting fuse (FU); Rectifier bridge at the AC-DC converter is inner, and only at the other respectively series connection of the thyristor of a lower brachium pontis installing fast acting fuse (FU), quantity is 6 altogether; In the DC side of AC-DC converter, then be the positive pole series connection installing fast acting fuse (FU) in load, quantity is 1.
In the present embodiment, overvoltage protection is the protected mode that adopts piezoresistive element, capacitance-resistance buffer and Electronic Protection control board to match.On the one hand, adopt piezo-resistance in AC-DC converter AC overvoltage, the piezo-resistance mode of connection has star-star connection mode and delta connection mode, and this example is selected the star-star connection method, and piezo-resistance (VDR) quantity is 6 altogether.Thyristor in AC-DC converter rectifier bridge is resistance-capacitance absorption in parallel loop respectively, and (R1～R12, C1～C12) quantity is 12 in the resistance-capacitance absorption loop.In piezo-resistance of DC side installing of AC-DC converter, in parallel with load.On the other hand, detect in real time the electric current and voltage value of converter and signal is passed to the Electronic Protection control board by current-voltage transformer (PT), then the Electronic Protection control board can be by preset program starting protection switch and alarm buzzer if there is fault.
Overload protection, overcurrent protection and open-phase protection are to adopt the current/voltage value of current-voltage transformer (PT) detection AC-DC converter and signal is sent into the Electronic Protection control board; send into protection switch through signal after the processing of each module of Electronic Protection control board; if there is overcurrent, overload and open-phase fault, then the Electronic Protection control board can be by preset program starting protection switch and alarm buzzer.
Embodiment two
The global design of 6 pulse waves high-power AC-DC converter peculiar to vessel and protection configuration see also Fig. 2.The utility model the second embodiment provides a kind of 6 pulse waves based on thyristor high-power AC-DC converter peculiar to vessel.Its guard method is identical with the guard method of 12 pulse high-power AC-DC converters.
Short-circuit protection is divided in AC-DC converter AC, the bridge and three aspects of DC side in the present embodiment, at AC-DC converter AC, that quantity is 3 altogether, and installs respectively protection switch at every inlet wire series connection installing fast acting fuse (FU); Rectifier bridge at the AC-DC converter is inner, and only at the other respectively series connection of the thyristor of a lower brachium pontis installing fast acting fuse (FU), quantity is 3 altogether; In the DC side of AC-DC converter, then be the positive pole series connection installing fast acting fuse (FU) in load, quantity is 1.
In the present embodiment, overvoltage protection is the protected mode that adopts piezoresistive element, capacitance-resistance buffer and Electronic Protection control board to match.On the one hand, adopt piezo-resistance star-connection mode in AC-DC converter AC overvoltage, piezo-resistance (VDR) quantity is 3 altogether.Thyristor in AC-DC converter rectifier bridge is resistance-capacitance absorption in parallel loop respectively, and (R1～R6, C1～C6) quantity is 6 in the resistance-capacitance absorption loop.In piezo-resistance of DC side installing of AC-DC converter, in parallel with load.On the other hand, detect in real time the electric current and voltage value of converter and signal is passed to the Electronic Protection control board by current-voltage transformer (PT), then the Electronic Protection control board can be by preset program starting protection switch and alarm buzzer if there is fault.
Overload protection, overcurrent protection and open-phase protection are to adopt the current/voltage value of current-voltage transformer (PT) detection AC-DC converter and signal is sent into the Electronic Protection control board; send into protection switch through signal after the processing of each module of Electronic Protection control board; if there is overcurrent, overload and open-phase fault, then the Electronic Protection control board can be by preset program starting protection switch and alarm buzzer.
Electronic Protection control board hardware module figure sees also Fig. 3.The Electronic Protection control board of high-power AC-DC converter peculiar to vessel partly is comprised of signal sampling processing module, analog-to-digital conversion module, CPU module, photoelectric isolation module, switching value output module, signal display module etc.; and each several part is made on the corresponding printed circuit board (PCB), the lead-in wire of contacts with overseas parties is drawn by plug on the plate.At first be that the current-voltage transformer collection signal is processed through the oversampled signals processing module, the sampled signal processing module comprises module 1 and module 2, module 1 is as voltage follower, module 2 is as the computing comparator, its objective is input signal by a certain percentage become the signal that satisfies the analog-to-digital conversion module standard for manual sampling.Then signal is sent into and carried out analog-to-digital conversion in the analog-to-digital conversion module, in sending into the CPU module, carry out computing and compare with the electric current and voltage rated value, simultaneously the electric current and voltage value is shown sending into the communication display module.Input signal is sent its output signal into photoelectric isolation module more afterwards through computing; photoelectric isolation module is driven by optocoupler and optocoupler forms; optocoupler can be exported a signal to the switching value input/output module after driving optocoupler; switching value output module is comprised of triode and relay; signal makes the triode conducting, and triode control relay switch shape is finished warning and the protection of overload, overvoltage, overcurrent and phase shortage.
Chip on the Electronic Protection control board choose can have a variety of, as long as can realize that the chip of corresponding module function can.For example, the CPU module can be selected a variety of chips, such as single-chip microcomputer (MCU) series, DSP is serial, ARM is serial, FPGA is serial etc. can.This CPU module is selected the TMS320F2812DSP chip, by its core controller and digital signal processor as circuit, with protection and the monitoring function of completing circuit.
Claims (7)
1. peculiar to vessel high-power AC-DC converter based on thyristor; it is characterized in that: each output of AC-DC converter AC connects a current transformer and a voltage transformer; current transformer, voltage transformer are connected with Electronic Protection control board input respectively; to Electronic Protection control board input signal; Electronic Protection control board Real-Time Monitoring fault, control protection switch and alarm buzzer.
2. a kind of peculiar to vessel high-power AC-DC converter based on thyristor according to claim 1; it is characterized in that: described Electronic Protection control board is by the sampled signal processing module; analog-to-digital conversion module; the CPU module; LCD MODULE; photoelectric isolation module; switching value output module and alarm buzzer form; the transducer collection signal is sent to the sampled signal processing module; the sampled signal processing module changes signal in proportion into the signal that satisfies the analog-to-digital conversion module standard for manual sampling and sends analog-to-digital conversion module to carries out analog-to-digital conversion; the CPU module is obtained the laggard row operation of signal that analog-to-digital conversion module transmits; compare with the electric current and voltage rated value; comparative result is sent to photoelectric isolation module; output signal was finished overload to the switching value input/output module by switching value input/output module control relay switch shape after photoelectric isolation module drove optocoupler; overvoltage; the warning of overcurrent and phase shortage and protection.
3. a kind of peculiar to vessel high-power AC-DC converter based on thyristor according to claim 1 and 2, it is characterized in that: also comprise piezo-resistance and resistance-capacitance absorption loop, in three piezo-resistances of the star-like connection in each overvoltage place of AC-DC converter AC, each thyristor in AC-DC converter rectifier bridge resistance-capacitance absorption loop in parallel is in the DC side of an AC-DC converter piezo-resistance in parallel with load.
4. a kind of peculiar to vessel high-power AC-DC converter based on thyristor according to claim 3; it is characterized in that: also comprise protection switch and fast acting fuse; at every inlet wire series connection protection switch of installing and fast acting fuse of AC-DC converter AC, at fast acting fuse of positive pole series connection of the DC side load of AC-DC converter.
5. a kind of peculiar to vessel high-power AC-DC converter based on thyristor according to claim 4 is characterized in that: described current transformer and voltage transformer are in parallel or be connected on AC-DC converter AC output.
6. a kind of peculiar to vessel high-power AC-DC converter based on thyristor according to claim 5, it is characterized in that: described sampled signal processing module is comprised of voltage follower concatenation operation comparator, with the pro rata signal that satisfies the analog-to-digital conversion module standard for manual sampling that is transformed into of input signal.
7. a kind of peculiar to vessel high-power AC-DC converter based on thyristor according to claim 6; it is characterized in that: described switching value output module connects relay by triode and forms; input signal makes the triode conducting, is come warning and the protection of completing circuit by triode control relay on off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202623291U CN202817721U (en) | 2012-06-05 | 2012-06-05 | Marine high-power AC-DC (alternating current-direct current) converter based on thyristor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202623291U CN202817721U (en) | 2012-06-05 | 2012-06-05 | Marine high-power AC-DC (alternating current-direct current) converter based on thyristor |
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| Publication Number | Publication Date |
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| CN202817721U true CN202817721U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202623291U Expired - Fee Related CN202817721U (en) | 2012-06-05 | 2012-06-05 | Marine high-power AC-DC (alternating current-direct current) converter based on thyristor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801140A (en) * | 2012-06-05 | 2012-11-28 | 哈尔滨工程大学 | Marine high-power AC-DC (alternating current-direct current) converter based on thyristor |
| US9654023B2 (en) | 2014-01-27 | 2017-05-16 | Qatar Foundationfor Education, Science And Communicty Development | DC side fault isolator for high voltage DC convertors |
-
2012
- 2012-06-05 CN CN2012202623291U patent/CN202817721U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801140A (en) * | 2012-06-05 | 2012-11-28 | 哈尔滨工程大学 | Marine high-power AC-DC (alternating current-direct current) converter based on thyristor |
| US9654023B2 (en) | 2014-01-27 | 2017-05-16 | Qatar Foundationfor Education, Science And Communicty Development | DC side fault isolator for high voltage DC convertors |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150605 |
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| EXPY | Termination of patent right or utility model |