CN204046402U - A kind of supervisory control system of capcade multi-level high-voltage frequency transfomrer power unit - Google Patents
A kind of supervisory control system of capcade multi-level high-voltage frequency transfomrer power unit Download PDFInfo
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- CN204046402U CN204046402U CN201420533099.7U CN201420533099U CN204046402U CN 204046402 U CN204046402 U CN 204046402U CN 201420533099 U CN201420533099 U CN 201420533099U CN 204046402 U CN204046402 U CN 204046402U
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Abstract
Wood utility model provides a kind of supervisory control system of capcade multi-level high-voltage frequency transfomrer power unit, belongs to high-voltage frequency converter technology field.Comprise: the input of system power supply (1), supervisory pilot light (4), optical fiber receives (6), optical fiber exports and sends (5), programmable logic device (3), input voltage measurement (10), input voltage given (11), comparator (7), temperature detection (12), photoelectrical coupler (13), buffer circuit (8), photoelectric isolated chip (9), bypass protection (2).The utility model has the advantage of and capcade multi-level high-voltage frequency transfomrer power unit can be made to be in good monitor state, and have good protective effect to power cell.
Description
Technical field
The utility model relates to high-voltage frequency converter technology field, particularly relates to a kind of supervisory control system of capcade multi-level high-voltage frequency transfomrer power unit.
Background technology
Capcade multi-level high-voltage frequency transfomrer has been applied in the industrial production.Because it adopts multiple cascade of power units mode, so just seem especially important to the monitoring of the power cell of multiple cascade.There is multiple implementation method to the monitoring of power cell, along with the development of electronic device, electronic technology, adopt Novel electronic devices, and there is device signal being had to fast processing function, good monitoring and protection reliably will be carried out to power cell.
Utility model content
The purpose of this utility model is the supervisory control system providing a kind of capcade multi-level high-voltage frequency transfomrer power unit; to complete the real-time monitoring to power cell; the fault occurred is shown; and bypass changeover is carried out to the power cell broken down; so, power cell is played a very good protection.
The utility model comprises: system power supply 1, supervisory pilot light 4, optical fiber input reception 6, optical fiber export that transmission 5, programmable logic device 3, input voltage measurement 10, input voltage are given 11, comparator 7, temperature detection 12, photoelectrical coupler 13, buffer circuit 8, photoelectric isolated chip 9, bypass protection 2.Optical fiber input reception 6, optical fiber export transmission 5 and connect with programmable logic device 3; programmable logic device 3 connects with buffer circuit 8; buffer circuit 8 connects with photoelectric isolated chip 9; input voltage measurement 10 and input voltage given 11 connect with comparator 7; temperature detection 12 connects with photoelectrical coupler 13, and photoelectrical coupler 13, bypass protection 2, supervisory pilot light 4 and comparator 7 connect with programmable logic device 3.
The pulse inputted from optical fiber and enable two ways of optical signals receive through optical fiber input, and be connected with programmable logic device, signal after treatment, is connected with buffer circuit, after cushioning, is connected with output through photoelectric isolated chip to signal; Meanwhile, the voltage of this supervisory control system to the input of power cell is monitored, given after comparator with input voltage, is connected with programmable logic device; After temperature detection being carried out to the working temperature of power cell by temperature sensor, be connected with programmable logic device through photoelectrical coupler; The fault-signal returned; be connected with photoelectric isolated chip; after buffer circuit cushions fault-signal; send into programmable logic device; through logical process, after the type of failure judgement, send fault-signal; send into supervisory pilot light; meanwhile, by fault message, by optical fiber by fault message; import higher level's control system into; if there is heavy fault, corresponding protection act be carried out, namely send control signal by programmable logic device; drive bypass circuit part, bypass is played a protective role.
The utility model makes the light signal of input after receiving, utilize the fast processing function of programmable logic device, accurately the signal of telecommunication after conversion is exported, meanwhile, the fault-signal fed back, after treated, the logical process function utilizing programmable logic device powerful, carries out analyzing and processing to the kind of fault, makes corresponding instruction, and sending signal, protective circuit works; In addition, the working temperature of power cell is detected, and the information detected is processed.
Pulse and enable two ways of optical signals are input to optical fiber input reception 6, the signal of telecommunication is sent into programmable logic device 3, carry out distributing and processing through programmable logic device 3, after being cushioned by buffer circuit 8 pairs of signals, then through photoelectric isolated chip 9, signal is exported.
The voltage detected through input voltage measurement 10 and the signal of input voltage given 11 send into comparator 7 simultaneously, result after relatively sends into programmable logic device 3, if the voltage detected is not within given voltage range, after the analyzing and processing of programmable logic device 3, if the scope exceeding given voltage is exactly overvoltage, there is corresponding overvoltage indicator light to show, if be exactly under voltage lower than the scope of given voltage, have corresponding under voltage indicator light to show.
Temperature detection 12 detects the temperature signal of power cell real work, through the buffer action of photoelectric coupling circuit 13, after isolating, do not have noisy signal to send into programmable logic device 3 and carry out analyzing and processing, if the temperature signal detected is normal signal, programmable logic device 3 will not have corresponding action, if the temperature signal detected is spectral artifacts, programmable logic device 3 will export control signal, drive supervisory pilot light 4 to show excess temperature, alarm simultaneously.
The fault message of power cell, after effect by photoelectric isolated chip 9, after the buffering of buffer circuit 8 pairs of fault-signals, send into programmable logic device 3, programmable logic device 3, by its powerful logical process function, carries out analyzing and processing to the fault-signal of input respectively, determine which kind of fault-signal fault-signal belongs to, meanwhile, drive corresponding supervisory pilot light 4, carry out malfunction coefficient.Meanwhile, system is divided into out four kinds of malfunctions, exports transmission 5, will represent two light signals of four kinds of fault-signals through optical fiber, sends into higher level's control system.For in four kinds of malfunctions, only occur when weighing fault (as overvoltage), bypass protection 2 sends control signal through programmable logic device 3, and carry out bypass action, defencive function comes into force.
Beneficial effect
The advantage of this supervisory control system is:
(1) apply programmable logic device, the signal of input and feedback is processed fast, completes real-time monitoring, and to the fault occurred, send control signal, power cell is protected.
(2) because this supervisory control system is used on power cell, be in the environment of high pressure, connect so the pulse connected with higher level's control system, enable signal and feedback fault all have employed optical fiber.
(3) this supervisory control system timely, errorlessly to the fault message occurred can import higher level's control system into, simultaneously in this supervisory control system, shows corresponding fault.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Comprise: programmable logic device 3, supervisory pilot light 4, buffer circuit 8, photoelectric isolated chip 9, input voltage measurement 10, system power supply 1, bypass protection 2, optical fiber export that transmission 5, optical fiber input reception 6, comparator 7, input voltage are given 11, temperature detection 12, photoelectric coupling circuit 13.
Embodiment
Below in conjunction with accompanying drawing, this patent is further described.
Shown in Figure 1, a kind of supervisory control system of capcade multi-level high-voltage frequency transfomrer power unit comprises: the input of system power supply (1), supervisory pilot light (4), optical fiber receives (6), optical fiber exports and sends (5), programmable logic device (3), input voltage measurement (10), input voltage given (11), comparator (7), temperature detection (12), photoelectrical coupler (13), buffer circuit ((8), photoelectric isolated chip (9), bypass protection ((2).Optical fiber input receives (6) and optical fiber output transmission (5) connects with programmable logic device (3), programmable logic device (3) connects with buffer circuit (8), buffer circuit (8) connects with photoelectric isolated chip (9), input voltage measurement (10) and input voltage given (11) connect with comparator (7), temperature detection (12) connects with photoelectrical coupler (13), photoelectrical coupler (13), bypass protection (2), supervisory pilot light (4) and comparator (7) connect with programmable logic device (3).
Pulse and enable two ways of optical signals are input to optical fiber input and receive (6) R-2521, the signal of telecommunication is sent into programmable logic device (3), carry out distributing and processing through programmable logic device (3), after buffer circuit (8) use chip 74HC244 cushions signal, then through photoelectric isolated chip (9) CD4504, signal is exported.
The signal of the voltage that input voltage measurement (10) uses voltage transformer LV25-P to detect and input voltage given (11) sends into comparator (7) LM348 simultaneously, result after relatively sends into programmable logic device (3), if the voltage detected is not within given voltage range, after the analyzing and processing of programmable logic device (3), if the scope exceeding given voltage is exactly overvoltage, corresponding overvoltage indicator light is had to show, if the scope lower than given voltage is exactly under voltage, corresponding under voltage indicator light is had to show.
Temperature detection (12) serviceability temperature transducer detects the temperature signal of power cell real work, after the buffer action of photoelectric coupling circuit (13) TLP-521, do not have noisy signal to send into programmable logic device (3) and carry out analyzing and processing, if the temperature signal detected is normal signal, programmable logic device (3) will not have corresponding action, if the temperature signal detected is spectral artifacts, programmable logic device (3) programmable logic device will export control signal, drive supervisory pilot light (4) display excess temperature, alarm simultaneously.
The fault message of power cell, after effect by photoelectric isolated chip (9) CD4504, after buffer circuit (8) 74HC244 is to the buffering of fault-signal, send into programmable logic device (3), programmable logic device (3) is by its powerful logical process function, respectively analyzing and processing is carried out to the fault-signal of input, determine which kind of fault-signal fault-signal belongs to, simultaneously, drive corresponding supervisory pilot light (4), carry out malfunction coefficient.Meanwhile, system is divided into out four kinds of malfunctions, exports and sends (5) T-1521, will represent two light signals of four kinds of fault-signals, send into higher level's control system through optical fiber.
For in four kinds of malfunctions, only occur when weighing fault (as overvoltage), bypass protection C2) send control signal through programmable logic device (3), carry out bypass action, defencive function comes into force.
This patent can make capcade multi-level high-voltage frequency transfomrer power unit be in good monitor state, and has good protective effect to power cell.
Claims (1)
1. the supervisory control system of a capcade multi-level high-voltage frequency transfomrer power unit, comprise system power supply (1), supervisory pilot light (4), optical fiber input receives (6), optical fiber output sends (5), programmable logic device (3), input voltage measurement (10), input voltage given (11), comparator (7), temperature detection (12), photoelectrical coupler (13), buffer circuit ((8), photoelectric isolated chip ((9), bypass protection ((2), it is characterized in that: optical fiber input receives (6) and optical fiber output transmission (5) connects with programmable logic device (3), ((8) connect for programmable logic device (3) and buffer circuit, (((9) connect buffer circuit for (8) and photoelectric isolated chip, input voltage measurement (10) and input voltage given (11) connect with comparator (7), temperature detection (12) connects with photoelectric coupling circuit (13), photoelectrical coupler (13), bypass protection (2), supervisory pilot light (4) and comparator (7) connect with programmable logic device (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533099.7U CN204046402U (en) | 2014-09-17 | 2014-09-17 | A kind of supervisory control system of capcade multi-level high-voltage frequency transfomrer power unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420533099.7U CN204046402U (en) | 2014-09-17 | 2014-09-17 | A kind of supervisory control system of capcade multi-level high-voltage frequency transfomrer power unit |
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| CN204046402U true CN204046402U (en) | 2014-12-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218777A (en) * | 2014-09-17 | 2014-12-17 | 国家电网公司 | Monitoring system of cascaded multilevel high-voltage inverter power unit |
| CN105652852A (en) * | 2015-12-21 | 2016-06-08 | 长沙奥托自动化技术有限公司 | Detection and monitoring system of high-voltage frequency converter power unit and mainboard thereof |
-
2014
- 2014-09-17 CN CN201420533099.7U patent/CN204046402U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218777A (en) * | 2014-09-17 | 2014-12-17 | 国家电网公司 | Monitoring system of cascaded multilevel high-voltage inverter power unit |
| CN105652852A (en) * | 2015-12-21 | 2016-06-08 | 长沙奥托自动化技术有限公司 | Detection and monitoring system of high-voltage frequency converter power unit and mainboard thereof |
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