CN205749760U - Voltage transformer open delta circuit breaking monitoring device - Google Patents
Voltage transformer open delta circuit breaking monitoring device Download PDFInfo
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- CN205749760U CN205749760U CN201620593376.2U CN201620593376U CN205749760U CN 205749760 U CN205749760 U CN 205749760U CN 201620593376 U CN201620593376 U CN 201620593376U CN 205749760 U CN205749760 U CN 205749760U
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- 238000004891 communication Methods 0.000 claims abstract description 33
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 10
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Abstract
The utility model discloses voltage transformer open delta circuit breaking monitoring device, including the fixing ear of totally-enclosed cabinet and installation, it is characterised in that: the front face of described totally-enclosed cabinet is provided with display screen；It is provided with operation keyboard in the downside of display screen；The right side of display screen is provided with signal lamp；It is provided with PCB main board in described totally-enclosed cabinet；The secondary circuit voltage connecting terminal block of 10KV bus it is provided with on the upside of the rear wall of described totally-enclosed cabinet；485 communication terminal rows it are provided with on the downside of the rear wall of described totally-enclosed cabinet；It is provided with Ethernet interface on the right side of the rear wall of described totally-enclosed cabinet.This voltage transformer open delta circuit breaking monitoring device, can send warning information in time when broken string occurs in open delta secondary circuit and report and submit scheduling station so that maintainer handles it, the hidden danger of abatement apparatus emerged in operation；Ensure that device monitoring result reliability and sensitivity, ensure that open delta loop zero defect runs.
Description
Technical field
This utility model relates to the improvement of a kind of voltage transformer secondary voltage monitor, specifically a kind of voltage
Transformer open delta circuit breaking monitoring device.
Background technology
The auxiliary Secondary Winding of voltage transformer is the most end to end but do not close by delta connection, is open delta
Loop；Voltage transformer open delta voltage 3U0It is that the vice-side winding by three-phase transformer joins end to end the voltage formed successively,
As shown in Figure 6, Ua vector, Ub vector, Uc vector head and the tail triangularity connects, but does not closes.Voltage transformer open delta around
Group is when equipment belt load is properly functioning, and port voltage is essentially 1-2V, and outs open triangle winding secondary terminals voltage is zero, when
When there is fuse punch through damage or circuit breaking situation occur in open-triangular winding secondary circuit, because A, B, C three-phase electricity
Pressure is all normal, and open delta voltage exists induced voltage in addition, and its circuit breaking is difficult to be noticeable, the most existing 10kV line
Line protection device or Small Electric Current Earthing And Routing Device all cannot accurately judge whether open-triangular winding secondary circuit occurs breaking
Line.If now there is isolated neutral system singlephase earth fault, fault phase voltage-to-ground reduces to zero, and healthy phases is the most electric
Pressure rises a height of originalTimes, open delta voltage 3U0Voltage is zero after disconnecting, and existing Small Electric Current Earthing And Routing Device is then
Because of open delta voltage be zero cannot failure judgement bus, bring potential safety hazard to the earthing wire-selecting function of equipment.
By retrieval, Chinese patent CN104535956A discloses one " detection voltage transformer secondary opening three
The method of angle circuit connection/polarity correctness ", it is possible to solve open delta incorrect polarity and cause zero-sequenceprotection misoperation or tripping
The problem made, it is impossible to can promptly and accurately send warning information when broken string occurs in open delta secondary circuit.Have not yet to see
Open delta secondary circuit occurs promptly and accurately judging broken position during broken string and send warning information to report and submit scheduling main in time
Stand so that the report of device handled it of maintainer.
Summary of the invention
The purpose of this utility model is to provide a kind of interactive interface friendly, it is judged that accurately, Late reformation installs additional easily
Voltage transformer open delta circuit breaking monitoring device.This voltage transformer open delta circuit breaking monitoring device, can be real
Time monitor and record three-phase voltage and residual voltage, open delta secondary circuit occur broken string time can promptly and accurately send alarm
Information also reports and submits scheduling station so that maintainer handles it, the hidden danger of abatement apparatus emerged in operation.
In order to reach object above, this utility model be the technical scheme is that this voltage transformer open delta returns
Road disconnection monitor, ear is fixed in the installation including totally-enclosed cabinet and two ends, it is characterised in that: described totally-enclosed cabinet
Front face is provided with initialization information LCDs；It is provided with operation keyboard in the downside of initialization information LCDs；?
The right side of initialization information LCDs is provided with signal lamp；It is provided with communication unit, master in described totally-enclosed cabinet
Control unit, voltage sensor data acquisition unit and the PCB main board of power module；Set on the upside of the rear wall of described totally-enclosed cabinet
There is the secondary circuit voltage connecting terminal block of 10KV bus；It is provided with 485 communication terminals on the downside of the rear wall of described totally-enclosed cabinet
Row；It is provided with Ethernet interface on the right side of the rear wall of described totally-enclosed cabinet；Voltage sensor data acquisition unit, power module and
Operation keyboard accesses main control unit, and main control unit accesses initialization information LCDs and communication unit；Communication unit passes through
Serial ports or Ethernet interface are sent to communication apparatus；Voltage sensor data acquisition unit gathers the secondary circuit electricity of 10KV bus
The U of compression bonded line terminal blockLPhase, ULNPhase, Ua phase, Ub phase, Uc phase and the voltage data of Un phase, voltage transformer exchange A, B, C tri-
Phase voltage and open delta voltage enter voltage transformer data acquisition unit after second-order low-pass filter and are converted into numeral letter
Number input main control unit, digital signal is carried out by the main control unit being made up of high-performance Blackfin series processors and memorizer
Processing logic decision, the current busbar voltage judged and parameters information result are passed through initialization information liquid by main control unit again
Crystal display screen shows, and will deliver to the communication apparatus of scheduling station on signal by communication unit.
This utility model is implemented also by following measure: described operation keyboard include return key, downturning key, upturning key,
Determining key, under different menu environment, function is different, is mainly used in parameter setting, switching menu, the information of user interactive.
Described power module is connected with 220V ac/dc power supply.
Described signal lamp has four, respectively run indicator, broken string display lamp, alarm indicator and communication
Display lamp, is all connected with the circuit of main control unit.
The application of voltage transformer open delta circuit breaking monitoring device is completed by following steps:
(1), first the secondary circuit of 10KV bus is accessed voltage wiring terminal row, power supply and 485 communication terminals or
Network interface related layouts is perfect, and on and off switch is placed in ON state, voltage transformer open delta circuit breaking monitoring device
Power on properly functioning, run indicator Chang Liang after hardware initialization is complete；
(2), system properly functioning time, vector Ua vector, Ub vector Uc vector sum 3U0Be zero, i.e. ULVector ULN
Vector isoelectric level, measures Ua vector and U the most respectivelyLVoltage between vector, then be voltage A phase Secondary Winding voltage；Measure
Voltage, Ub vector and U between Ub vector and Uc vectorLVoltage between vector, is all the corresponding single-phase winding voltage of transformer secondary；
(3), broken position is judged: as any one phase voltage and ULTime between Xiang because losing reference value voltage Ux≤40V, then
Judge at open delta loop ULThere is broken string in phase side, and broken string display lamp is bright, and alarm indicator is the brightest；When any one phase voltage
With ULBetween Xiang during pressure reduction Ux≤40V, then judge at open delta secondary circuit ULTo ULNBreak between phase earth point,
Broken string display lamp is bright, and alarm indicator is the brightest；As any one phase voltage and ULNBetween Xiang during voltage Ux≤40V, then judge opening
Mouth triangle loop ULNBreaking in loop after phase side joint place, broken string display lamp is bright, and alarm indicator is the brightest；
(4), under serial port, operating personnel is by serial ports number and baud under operation button set-up function menu
Rate, after communicating to connect successfully, communication display lamp is bright, it is judged that result that whether open delta loop breaks also passes through communication unit
The communication apparatus of scheduling station will be delivered on signal；
(5), maintainer receive open delta secondary circuit occur broken string time accurate warning information after, do source immediately
Reason, gets final product the hidden danger of abatement apparatus emerged in operation.
The beneficial effects of the utility model are: this voltage transformer open delta circuit breaking monitoring device, can be in real time
Monitor and record three-phase voltage and residual voltage, can promptly and accurately send alarm letter when broken string occurs in open delta secondary circuit
Cease and report and submit scheduling station so that maintainer handles it, the hidden danger of abatement apparatus emerged in operation；This device, installs and ties up
Protecting conveniently, have the man machine interface of close friend, communication modes is flexible, by monitoring phase voltage in real time and open delta loop voltage difference and
Hardware Design, ensure that device monitoring result reliability and sensitivity, ensure that open delta loop zero defect reliably
Run.
Accompanying drawing explanation
Fig. 1 is that structure master of the present utility model cuts open schematic diagram depending on office.
Fig. 2 is structure PCB main board schematic top plan view of the present utility model.
Fig. 3 is structure schematic rear view of the present utility model.
Fig. 4 is structural circuit theory diagram of the present utility model.
Fig. 5 is structure main control unit logic decision schematic diagram of the present utility model.
Fig. 6 is the auxiliary Secondary Winding circuit theory schematic diagram of structure voltage transformer of the present utility model.
Detailed description of the invention
This utility model is made with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6.Break in this voltage transformer open delta loop
Line monitoring device, the installation including totally-enclosed cabinet 1 and two ends fixes ear 2, by install fixing ear 2 be fixed on switch cubicle or
On sealer, it is characterised in that: the front face of described totally-enclosed cabinet 1 is provided with initialization information LCDs 3；Just
The downside of beginning information LCDs 3 is provided with operation keyboard 4；It is provided with signal on the right side of initialization information LCDs 3
Display lamp 5；Communication unit 61, main control unit 62, voltage sensor data acquisition unit it is provided with in described totally-enclosed cabinet 1
63 and the PCB main board 6 of power module 64；The secondary circuit electricity of 10KV bus it is provided with on the upside of the rear wall of described totally-enclosed cabinet 1
Compression bonded line terminal block 7；485 communication terminal rows 8 it are provided with on the downside of the rear wall of described totally-enclosed cabinet 1；Described totally-enclosed cabinet 1
Rear wall on the right side of be provided with Ethernet interface 9；Voltage sensor data acquisition unit 63, power module 64 and operation keyboard 4 access
Main control unit 62, main control unit 62 accesses initialization information LCDs 3 and communication unit 61；Communication unit 61 passes through serial ports
Or Ethernet interface 9 is sent to communication apparatus 65；Voltage sensor data acquisition unit 63 gathers the secondary circuit of 10KV bus
The U of voltage wiring terminal row 7LPhase, ULNPhase, Ua phase, Ub phase, Uc phase and the voltage data of Un phase, voltage transformer exchange A, B,
C three-phase voltage and open delta voltage enter voltage transformer data acquisition unit 63 after second-order low-pass filter and are converted into number
Word signal input main control unit 62, the main control unit 62 being made up of high-performance Blackfin series processors and memorizer is by numeral
Signal carries out processing logic decision, and the current busbar voltage judged and parameters information result are passed through just by main control unit 62 again
Beginning information LCDs 3 shows, and will deliver to the communication apparatus 65 of scheduling station on signal by communication unit 61.
This utility model is implemented also by following measure: described operation keyboard 4 include return key, downturning key, upturning key,
Determining key, under different menu environment, function is different, is mainly used in parameter setting, switching menu, the information of user interactive.
Described power module 64 is connected with 220V ac/dc power supply.
Described signal lamp 5 has four, respectively run indicator 51, broken string display lamp 52, alarm indicator
53 and communication display lamp 54, all circuit with main control unit 62 be connected.
The application process of voltage transformer open delta circuit breaking monitoring device, it is characterised in that: complete by following steps
Become: (1), first the secondary circuit of 10KV bus is accessed voltage wiring terminal row 7, power supply and 485 communication terminal 8 or networks
Interface 9 related layouts is perfect, and on and off switch is placed in ON state, and voltage transformer open delta circuit breaking monitoring device powers on
Properly functioning, run indicator 51 Chang Liang after hardware initialization is complete；
(2), system properly functioning time, vector Ua vector, Ub vector Uc vector sum 3U0Be zero, i.e. ULVector ULN
Vector isoelectric level, measures Ua vector and U the most respectivelyLVoltage between vector, then be voltage A phase Secondary Winding voltage；Measure Ub
Voltage, Ub vector and U between vector and Uc vectorLVoltage between vector, is all corresponding transformer secondary single-phase winding electricity
Pressure；
(3), broken position is judged: as any one phase voltage and ULTime between vector because losing reference value voltage Ux≤40V,
Then judge at open delta loop ULThere is broken string in vector side, and broken string display lamp 52 is bright, and alarm indicator 53 is the brightest；When arbitrarily
One phase voltage and ULBetween Xiang during pressure reduction Ux≤40V, then judge at open delta secondary circuit ULTo ULNBetween phase earth point
Breaking, broken string display lamp 52 is bright, and alarm indicator 53 is the brightest；As any one phase voltage and ULNVoltage Ux≤40V between Xiang
Time, then judge at open delta loop ULNBreaking in loop after phase side joint place, broken string display lamp 52 is bright, and alarm refers to
Show that lamp 53 is the brightest；
(4), under serial port, operating personnel is by serial ports number and baud under operation button 4 set-up function menu
Rate, after communication successful connection, communication display lamp 54 is bright, it is judged that result that whether open delta loop breaks also passes through communication unit
Unit 61 will deliver to the communication apparatus 65 of scheduling station on signal；
(5), maintainer receive open delta secondary circuit occur broken string time accurate warning information after, do source immediately
Reason, gets final product the hidden danger of abatement apparatus emerged in operation.
Claims (2)
1. voltage transformer open delta circuit breaking monitoring device, ear is fixed in the installation including totally-enclosed cabinet (1) and two ends
(2), it is characterised in that: the front face of described totally-enclosed cabinet (1) is provided with initialization information LCDs (3)；Just
The downside of beginning information LCDs (3) is provided with operation keyboard (4)；Set on the right side of initialization information LCDs (3)
There is signal lamp (5)；Communication unit (61), main control unit (62), voltage induced it is provided with in described totally-enclosed cabinet (1)
The PCB main board (6) of device data acquisition unit (63) and power module (64)；Set on the upside of the rear wall of described totally-enclosed cabinet (1)
There is the secondary circuit voltage connecting terminal block (7) of 10KV bus；It is provided with 485 on the downside of the rear wall of described totally-enclosed cabinet (1) to lead to
News terminal block (8)；It is provided with Ethernet interface (9) on the right side of the rear wall of described totally-enclosed cabinet (1)；Voltage sensor data acquisition
Unit (63), power module (64) and operation keyboard (4) access main control unit (62), and main control unit (62) accesses initialization information
LCDs (3) and communication unit (61)；Communication unit (61) is sent to communication apparatus by serial ports or Ethernet interface (9)
(65)；Voltage sensor data acquisition unit (63) gathers the U of the secondary circuit voltage connecting terminal block (7) of 10KV busL
Phase, ULNPhase, Ua phase, Ub phase, Uc phase and the voltage data of Un phase, voltage transformer exchange A, B, C three-phase voltage and open delta
Voltage enters voltage transformer data acquisition unit (63) after second-order low-pass filter and is converted into digital signal input master control list
Unit (62), is carried out processing logic decision by digital signal by main control unit (62), and main control unit (62) works as father's former wife by judge again
Line voltage and parameters information result are shown by initialization information LCDs (3), and will by communication unit (61)
The communication apparatus (65) of scheduling station is delivered on signal.
Voltage transformer open delta circuit breaking monitoring device the most according to claim 1, it is characterised in that: described
Signal lamp (5) has four, respectively run indicator (51), broken string display lamp (52), alarm indicator (53) and lead to
News display lamp (54), all circuit with main control unit (62) are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620593376.2U CN205749760U (en) | 2016-06-17 | 2016-06-17 | Voltage transformer open delta circuit breaking monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620593376.2U CN205749760U (en) | 2016-06-17 | 2016-06-17 | Voltage transformer open delta circuit breaking monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205749760U true CN205749760U (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620593376.2U Active CN205749760U (en) | 2016-06-17 | 2016-06-17 | Voltage transformer open delta circuit breaking monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205749760U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN112255582A (en) * | 2020-09-18 | 2021-01-22 | 深圳供电局有限公司 | Open triangular loop detection method and device, computer equipment and storage medium |
-
2016
- 2016-06-17 CN CN201620593376.2U patent/CN205749760U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633250A (en) * | 2018-11-09 | 2019-04-16 | 国网浙江省电力有限公司台州供电公司 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
| CN112255582A (en) * | 2020-09-18 | 2021-01-22 | 深圳供电局有限公司 | Open triangular loop detection method and device, computer equipment and storage medium |
| CN112255582B (en) * | 2020-09-18 | 2024-04-09 | 深圳供电局有限公司 | Open triangle loop detection method, device, computer equipment and storage medium |
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