CN106602522A - Voltage transformer parallel apparatus and automatic parallel control logic thereof - Google Patents
Voltage transformer parallel apparatus and automatic parallel control logic thereof Download PDFInfo
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- CN106602522A CN106602522A CN201710075134.3A CN201710075134A CN106602522A CN 106602522 A CN106602522 A CN 106602522A CN 201710075134 A CN201710075134 A CN 201710075134A CN 106602522 A CN106602522 A CN 106602522A
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- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 40
- 230000003750 conditioning effect Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 238000012913 prioritisation Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H02J13/0013—
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- H02J13/0062—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/14—Protecting elements, switches, relays or circuit breakers
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Abstract
The invention, which belongs to the technical field of relay protection and automation of the power system, discloses a voltage transformer parallel apparatus for a single-bus segmented wiring way of a transformer substation and automatic parallel control logic thereof. The apparatus comprises an alternating-current plug-in unit, a CPU plug-in unit, a signal plug-in unit and a man-machine dialogue plug-in unit. A state of an automatic parallel control logic is detected to realize automatic control of voltage transformer parallel. The apparatus has functions of voltage sampling and parameter displaying, bus low-voltage protection, bus over-voltage protection, and voltage transformer disconnection detection and is capable of protecting and monitoring a voltage transformer effectively, thereby preventing voltage parallel accidents like abnormal parallel of voltage transformers and reverse charging of a secondary loop. The voltage transformer parallel apparatus can be applied to the automatic voltage transformer parallel field at the voltage levels of 35 kV and below.
Description
Technical field
The present invention relates to a kind of voltage transformer parallel device and its automatic Synchronization control logic, belong to power system relay
Protection and its technical field of automation.
Background technology
At present, in transformer station's list mother partition mode of connection, every section of bus has a voltage transformer, and is provided with two
Section bus-bar potential transformer shunt circuit.When certain section of bus voltage transformer because maintenance or failure stop labour and bus do not stop labour
When, it is to ensure that the secondary voltage of the equipment such as protection device, measuring instrumentss collection is corresponding with primary voltage, it is to avoid protection device occurs
Malfunction, tripping, it is desirable to make voltage transformer secondary side side by side by voltage transformer shunt circuit, make what is connect on this section of bus
Protection device, measuring instrumentss etc. can continue normal operation.
Traditional voltage transformer shunt circuit generally using bus, the auxiliary contact of disconnecting switch and centre after
Electrical equipment is constituted.Traditional voltage transformer parallel device is simple relay control device, only by judging that mother is breaking
The positional information of device, disconnecting switch etc. is arranged side by side to realize voltage transformer secondary side, when bus, the auxiliary of disconnecting switch
During the poor contact of contacts of contact or relay, easily cause voltage fail side by side, Secondary Circuit of Potential Transformer decompression, voltage
The accidents such as transformer secondary voltage reverse charge.And this kind of device lacks the work(such as alternating voltage sampling and display, switching value
Can, not with failure automatic discrimination function, it is impossible to monitor transformer substation voltage loop running status in real time, affect the safety of electrical network steady
It is fixed to run.
The content of the invention
It is an object of the present invention to be directed to the problems referred to above, propose that one kind possesses alternating voltage sampling and shows, switching value is examined
Brake, can monitor transformer substation voltage loop running status in real time, can carry out automatic Synchronization logic with reference to alternating voltage and sentence
It is disconnected, and there is fault warning, bus under-voltage protection, bus over voltage protection, busbar grounding protection, voltage transformer disconnection inspection
The voltage transformer parallel device of brake.
For achieving the above object, the technical solution used in the present invention is：A kind of voltage transformer parallel device and its automatically
Control logic, using inserter structure, including exchanges plug-in unit, CPU card, signal plug-in unit and human computer conversation's plug-in unit side by side, described
Exchange plug-in unit includes AC signal input sampling circuit, signal conditioning circuit and A/D change-over circuits, and the CPU card includes electricity
Source circuit, arm processor, network communications circuits and analogue quantity output circuit, the signal plug-in unit include switching value input circuit
And switching value output circuit, human computer conversation's plug-in unit includes liquid crystal display circuit, signal lighties indicating circuit and keyboard circuit, institute
State exchange plug-in unit, the signal plug-in unit, human computer conversation's plug-in unit to be connected by bus board with the CPU card.
Further, the exchange plug-in unit includes 10 AC signal input sampling circuits, and 10 AC signals are adopted
Sample circuit includes I bus A phase voltage U_A1 sample circuits, I bus B phase voltage U_B1 sample circuits, I bus C phase voltages U_C1
Sample circuit, I bus residual voltage U_L1 sample circuits, I bus extract voltage U_X1 sample circuits, II bus A phase voltages U_
A2 sample circuits, II bus B phase voltage U_B2 sample circuits, II bus C phase voltage U_C2 sample circuits, II bus residual voltage
U_L2 sample circuits, II bus extract voltage U_X2 sample circuits, the input of the AC signal sample circuit with it is described
It is sampled voltage to be connected, the outfan of the AC signal sample circuit is connected with the signal conditioning circuit input.
Further, the signal conditioning circuit in the exchange plug-in unit includes the first integrated transporting discharging A1, the second integrated transporting discharging
A2, the first diode D1, the second diode D2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th
Resistance R5, the first electric capacity C1, the second electric capacity C2, the negative pole of the first diode D1 are defeated with the AC signal sample circuit
Go out end, the inverting input of the positive pole of the second diode D2, the first integrated transporting discharging A1 is connected, first diode
The positive pole of D1 is connected with the negative pole of the second diode D2, the in-phase input end of the first integrated transporting discharging A1 common ground,
One end of first resistor R1 is connected with the inverting input of the first integrated transporting discharging A1, the first resistor R1 other end
It is connected with the outfan of the first integrated transporting discharging A1, one end of the first electric capacity C1 is defeated with the first integrated transporting discharging A1's
Go out end to be connected, the other end of the first electric capacity C1 ground connection, one end of second resistance R2 and the first integrated transporting discharging A1
Outfan be connected, the other end of second resistance R2 is connected with the inverting input of the second integrated transporting discharging A2, described
One end of 3rd resistor R3 is connected with the in-phase input end of the second integrated transporting discharging A2, another termination of 3rd resistor R3
Ground, one end of the 4th resistance R4 are connected with the inverting input of the second integrated transporting discharging A2, and the 4th resistance R4 is another
One end is connected with the outfan of the second integrated transporting discharging A2, one end and the second integrated transporting discharging A2 of the 5th resistance R5
Outfan be connected, the other end of the 5th resistance R5 be connected with one end of the second electric capacity C2 after jointly with the A/D
The input of change-over circuit is connected, the other end ground connection of the second electric capacity C2.
Further, a kind of voltage transformer parallel device and its automatic Synchronization control logic, also including outside female
Connection circuit breaker Q F, I bus isolating switch QS11, II bus isolating switch QS12, I bus-bar potential transformer disconnecting switch QS12,
II bus-bar potential transformer disconnecting switch QS22, I bus-bar potential transformer weight motor type relay KMR1, II bus-bar potential transformer weight
With earth leakage protective exchange in motor type relay KMR2, voltage transformer switching relay BLJ, voltage transformer secondary voltage circuit
Air switch ZK.
Further, present invention also offers a kind of automatic Synchronization for transformer substation voltage transformer parallel device is controlled
Logic, to the condition for judging voltage transformer automatic Synchronization, the automatic Synchronization control logic includes：
（1）Outside bus QF in the voltage transformer parallel device is in conjunction position；
（2）I bus isolating switch QS11 and II bus isolating switch QS12 in the voltage transformer parallel device locates simultaneously
Yu Hewei；
（3）I bus-bar potential transformer disconnecting switch QS12 in the voltage transformer parallel device is in closes position, or II female
Line voltage transformer disconnecting switch QS22 is in conjunction position；
（4）The in-phase voltage difference U_ of I bus secondary circuit and II bus secondary circuit in the voltage transformer parallel device
A12, U_B12 and U_C12 are respectively less than the setting valve U_SET of secondary circuit in-phase voltage difference.
Further, the voltage transformer parallel device is to above-mentioned（1）、（2）、（3）、（4）Logical judgment is carried out, when same
When meeting above-mentioned condition, its corresponding logic state is set to into logic 1；When the conditions set forth above are not met, it is which is corresponding
Logic state is set to logical zero, when above-mentioned（1）、（2）、（3）、（4）Logic state all logic 1 when, the mutual induction of voltage
Device parallel device output voltage transformer automatic Synchronization control signal after certain delay time T_SET.
Used as the further prioritization scheme of the present invention, the chip model of the arm processor in the CPU card is
MB9BF618S。
Used as the further prioritization scheme of the present invention, the network communications circuits in the CPU card include that 2 road RS485 are total
Line interface and 2 road RJ45 Ethernet interfaces, the chip model that wherein RS485 EBIs are adopted for SN65LBC184D, Ethernet
The chip model that interface is adopted is for DP83849ID.
As the further prioritization scheme of the present invention, the I bus secondary circuit and II bus secondary circuit in-phase voltage
The setting range of difference setting valve U_SET is 0V～50V, and the setting range of delay time T_SET is 0.1s ~ 100s, step-length
0.01s。
As the present invention further prioritization scheme, a kind of voltage transformer parallel device be configured with fault warning, I
Bus under-voltage protection, II bus under-voltage protection, I bus over voltage protection, II bus over voltage protection, I busbar grounding are protected
Shield, II busbar grounding protection, I bus-bar potential transformer burn out detection and II bus-bar potential transformer burn out detection function, it is described
A kind of voltage transformer parallel device supports IEC-103, MODBUS-RTU, TCP-103, IEC6185 communication protocol, can be long-range
Monitoring bus, the position signalling of disconnecting switch, support carry out voltage analog collection, parameter setting, failure report online
The function such as alert, can carry out long-range arranged side by side or off-the-line operation to voltage transformer.
The present invention can produce following good effect compared with the prior art：The voltage transformer parallel device and its automatically
Control logic, when realizing that voltage transformer automatic Synchronization is controlled, increased I bus secondary circuit and II bus secondary returning side by side
The criterion of road in-phase voltage difference, when I bus secondary circuit and II bus secondary circuit in-phase voltage difference meet condition of adjusting
When, voltage transformer is allowed side by side, and when in-phase voltage difference is unsatisfactory for adjusting condition, voltage transformer is not allowed side by side, while
Also there is the voltage transformer parallel device voltage parameter to gather low with display, on-off state detection, fault warning, bus
Voltage protection, bus over voltage protection, busbar grounding protection, voltage transformer disconnection detection function, whole device reliability height,
Capacity of resisting disturbance is stronger, can be prevented effectively from the generation of the accidents such as abnormal side by side, the secondary circuit reverse charge of voltage transformer, can be with
For the voltage transformer automatic Synchronization field of 35kV and following electric pressure.
4th, illustrate
Fig. 1 is the structural representation of voltage transformer parallel device of the present invention.
Fig. 2 is the principle schematic of signal conditioning circuit of the present invention.
Fig. 3 is single mother partition primary connection schematic diagram of the present invention.
Fig. 4 is the schematic diagram of automatic Synchronization control logic of the present invention.
Specific embodiment
In order to more fully explain the enforcement of the present invention, there is provided the embodiment of the present invention, these embodiments are only
Elaboration to the present invention, does not limit the scope of the invention.
As shown in figure 1, a kind of voltage transformer parallel device and its automatic Synchronization control logic, using inserter structure,
Including exchange plug-in unit, CPU card, signal plug-in unit and human computer conversation's plug-in unit, the exchange plug-in unit includes AC signal input sample
Circuit, signal conditioning circuit and A/D change-over circuits, the CPU card include power circuit, arm processor, network communications circuits
And analogue quantity output circuit, the signal plug-in unit includes switching value input circuit and switching value output circuit, the human computer conversation
Plug-in unit includes liquid crystal display circuit, signal lighties indicating circuit and keyboard circuit, the exchange plug-in unit, the signal plug-in unit, described
Human computer conversation's plug-in unit is connected by bus board with the CPU card.
The exchange plug-in unit includes 10 AC signal input sampling circuits, and 10 AC signal sample circuits include
I bus A phase voltage U_A1 sample circuits, I bus B phase voltage U_B1 sample circuits, I bus C phase voltage U_C1 sample circuits, I
Bus residual voltage U_L1 sample circuits, I bus extract voltage U_X1 sample circuits, II bus A phase voltage U_A2 sample circuits,
II bus B phase voltage U_B2 sample circuits, II bus C phase voltage U_C2 sample circuits, II bus residual voltage U_L2 sampling electricity
Road, II bus extract voltage U_X2 sample circuits, and input and described of the AC signal sample circuit are sampled voltage
It is connected, the outfan of the AC signal sample circuit is connected with the signal conditioning circuit input.
As shown in Fig. 2 the signal conditioning circuit in the exchange plug-in unit includes the first integrated transporting discharging A1, the second integrated transporting discharging
A2, the first diode D1, the second diode D2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th
Resistance R5, the first electric capacity C1, the second electric capacity C2, the negative pole of the first diode D1 are defeated with the AC signal sample circuit
Go out end, the inverting input of the positive pole of the second diode D2, the first integrated transporting discharging A1 is connected, first diode
The positive pole of D1 is connected with the negative pole of the second diode D2, the in-phase input end of the first integrated transporting discharging A1 common ground,
One end of first resistor R1 is connected with the inverting input of the first integrated transporting discharging A1, the first resistor R1 other end
It is connected with the outfan of the first integrated transporting discharging A1, one end of the first electric capacity C1 is defeated with the first integrated transporting discharging A1's
Go out end to be connected, the other end of the first electric capacity C1 ground connection, one end of second resistance R2 and the first integrated transporting discharging A1
Outfan be connected, the other end of second resistance R2 is connected with the inverting input of the second integrated transporting discharging A2, described
One end of 3rd resistor R3 is connected with the in-phase input end of the second integrated transporting discharging A2, another termination of 3rd resistor R3
Ground, one end of the 4th resistance R4 are connected with the inverting input of the second integrated transporting discharging A2, and the 4th resistance R4 is another
One end is connected with the outfan of the second integrated transporting discharging A2, one end and the second integrated transporting discharging A2 of the 5th resistance R5
Outfan be connected, the other end of the 5th resistance R5 be connected with one end of the second electric capacity C2 after jointly with the A/D
The input of change-over circuit is connected, the other end ground connection of the second electric capacity C2.
In the present embodiment, the external voltage sample range of the AC signal sample circuit is 0 ~ 120 VAC, using no-load voltage ratio
For the miniature current mode voltage transformer sampled input voltage of 2 mA/2 mA, through the signal conditioning circuit by current signal
Voltage signal is converted to, voltage signal digital quantity is converted to into using 16 high accuracy A/D converter AD7606, for described
Arm processor in CPU card is used.
Further, the arm processor in the CPU card selects 32 bit processor MB9BF618S, MB9BF618S's
Up to 144 MHz, Embedded has the FLASH ROM of the SRAM of 128 KB and 1024 KB to dominant frequency, containing 8 multi-functional serials
Port, containing 16 basic intervalometers and 3 Multifunctional timers, has been internally integrated 2 road ethernet controllers, with enough
Many I/O interfaces and quick processing data ability.
Further, the network communications circuits in the CPU card include 2 road RS485 EBIs and 2 road RJ45 ether
Network interface, the chip model that wherein RS485 EBIs are adopted for SN65LBC184D, Ethernet interface adopt chip model
For DP83849ID.
Further, in the signal conditioning circuit chip that the first integrated transporting discharging A1, the second integrated transporting discharging A2 is adopted
Model OP07, model 1N4148 that the first diode D1, the second diode D2 are adopted, first resistor R1 value 2.5k Ω,
Second resistance R2 value 2k Ω, 3rd resistor R3 value 1k Ω, the 4th resistance R4 value 1k Ω, 750 Ω of the 5th resistance R5 values,
First electric capacity C1 values 1nF, the second electric capacity C2 values 100nF.
As shown in figure 3, the voltage transformer parallel device and its automatic Synchronization control logic, for transformer station's list mother stock
In the segmentation mode of connection, also including outside bus QF, I bus isolating switch QS11, II bus isolating switch QS12, I
Bus-bar potential transformer disconnecting switch QS12, II bus-bar potential transformer disconnecting switch QS22, I bus-bar potential transformer again move after
Electrical equipment KMR1, II bus-bar potential transformer weight motor type relay KMR2, voltage transformer switching relay BLJ, voltage transformer two
With earth leakage protective alternating current air switch ZK in secondary voltage circuit.
As shown in figure 4, a kind of voltage transformer parallel device and its automatic Synchronization control logic, voltage transformer is certainly
Moving control logic arranged side by side includes：
（1）Outside bus QF in the voltage transformer parallel device is in conjunction position；
（2）I bus isolating switch QS11 and II bus isolating switch QS12 in the voltage transformer parallel device locates simultaneously
Yu Hewei；
（3）I bus-bar potential transformer disconnecting switch QS12 in the voltage transformer parallel device is in closes position, or II female
Line voltage transformer disconnecting switch QS22 is in conjunction position；
（4）The in-phase voltage difference U_ of I bus secondary circuit and II bus secondary circuit in the voltage transformer parallel device
A12, U_B12 and U_C12 are respectively less than the setting valve U_SET of secondary circuit in-phase voltage difference.
Further, the voltage transformer parallel device is to above-mentioned（1）、（2）、（3）、（4）Logical judgment is carried out, when same
When meeting above-mentioned condition, its corresponding logic state is set to into logic 1；When the conditions set forth above are not met, it is which is corresponding
Logic state is set to logical zero, when above-mentioned（1）、（2）、（3）、（4）Logic state all logic 1 when, the mutual induction of voltage
Device parallel device output voltage transformer automatic Synchronization control signal after certain delay time T_SET.
Further, the I bus secondary circuit and the II bus poor setting valve U_SET of secondary circuit in-phase voltage adjust
Scope is 0V～50V.The setting range of delay time T_SET be 0.1s ~ 100s, step-length 0.01s.
As the present invention further prioritization scheme, a kind of voltage transformer parallel device be configured with fault warning, I
Bus under-voltage protection, II bus under-voltage protection, I bus over voltage protection, II bus over voltage protection, I busbar grounding are protected
Shield, II busbar grounding protection, I bus-bar potential transformer burn out detection and II bus-bar potential transformer burn out detection function, it is described
A kind of voltage transformer parallel device supports IEC-103, MODBUS-RTU, TCP-103, IEC6185 communication protocol, can be long-range
Monitoring bus, the position signalling of disconnecting switch, support carry out voltage analog collection, parameter setting, failure report online
Alert function, can carry out long-range arranged side by side or off-the-line operation to voltage transformer.
After embodiments of the present invention are described in detail, one of ordinary skilled in the art is clearly understood that, is not taking off
Various change and modification can be carried out under above-mentioned claim with spirit, all technical spirits according to the present invention are real to more than
Any simple modification, equivalent variations and modification that example is made are applied, the scope of technical solution of the present invention is belonged to, and the present invention is also not
It is limited to the embodiment of example in description.
Claims (8)
1. a kind of voltage transformer parallel device and its automatic Synchronization control logic, it is characterised in that：Using inserter structure, wrap
Exchange plug-in unit, CPU card, signal plug-in unit and human computer conversation's plug-in unit are included, the exchange plug-in unit includes AC signal input sample electricity
Road, signal conditioning circuit and A/D change-over circuits, the CPU card include power circuit, arm processor, network communications circuits and
Analogue quantity output circuit, the signal plug-in unit include switching value input circuit and switching value output circuit, and the human computer conversation inserts
Part includes liquid crystal display circuit, signal lighties indicating circuit and keyboard circuit, the exchange plug-in unit, the signal plug-in unit, the people
Machine dialogue plug-in unit is connected by bus board with the CPU card.
2. a kind of voltage transformer parallel device according to claim 1 and its automatic Synchronization control logic, its feature exist
In：The exchange plug-in unit includes 10 AC signal input sampling circuits, and 10 AC signal input sampling circuits include I
It is bus A phase voltage U_A1 sample circuits, I bus B phase voltage U_B1 sample circuits, I bus C phase voltage U_C1 sample circuits, I female
Line residual voltage U_L1 sample circuits, I bus extract voltage U_X1 sample circuits, II bus A phase voltage U_A2 sample circuits, II
Bus B phase voltage U_B2 sample circuits, II bus C phase voltage U_C2 sample circuits, II bus residual voltage U_L2 sample circuits,
II bus extracts voltage U_X2 sample circuits.
3. a kind of voltage transformer parallel device according to claim 1 and its automatic Synchronization control logic, its feature exist
In：Signal conditioning circuit in the exchange plug-in unit includes the first integrated transporting discharging A1, the second integrated transporting discharging A2, the first diode
It is D1, the second diode D2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, first electric
Hold C1, the second electric capacity C2, the outfan of the negative pole of the first diode D1 and the AC signal sample circuit, described second
The positive pole of diode D2, the inverting input of the first integrated transporting discharging A1 are connected, the positive pole of the first diode D1 and institute
State negative pole, the connected common ground of in-phase input end of the first integrated transporting discharging A1 of the second diode D2, the first resistor
One end of R1 is connected with the inverting input of the first integrated transporting discharging A1, and the first resistor R1 other end and described first collects
Outfan into amplifier A1 is connected, and one end of the first electric capacity C1 is connected with the outfan of the first integrated transporting discharging A1, institute
State the other end ground connection of the first electric capacity C1, the outfan phase of one end of second resistance R2 and the first integrated transporting discharging A1
Even, the other end of second resistance R2 is connected with the inverting input of the second integrated transporting discharging A2,3rd resistor R3
One end be connected with the in-phase input end of the second integrated transporting discharging A2, the other end of 3rd resistor R3 ground connection, described the
One end of four resistance R4 is connected with the inverting input of the second integrated transporting discharging A2, the 4th resistance R4 other ends with it is described
The outfan of the second integrated transporting discharging A2 is connected, one end of the 5th resistance R5 and the outfan phase of the second integrated transporting discharging A2
Even, after the other end of the 5th resistance R5 is connected with one end of the second electric capacity C2 jointly with the A/D change-over circuits
Input is connected, the other end ground connection of the second electric capacity C2.
4. a kind of voltage transformer parallel device according to claim 1 and its automatic Synchronization control logic, its feature exist
In：The automatic Synchronization control logic, comprising Rule of judgment it is as follows：
（1）Outside bus QF in the voltage transformer parallel device is in conjunction position；
（2）I bus isolating switch QS11 and II bus isolating switch QS12 in the voltage transformer parallel device locates simultaneously
Yu Hewei；
（3）I bus-bar potential transformer disconnecting switch QS12 in the voltage transformer parallel device is in closes position, or II female
Line voltage transformer disconnecting switch QS22 is in conjunction position；
（4）The in-phase voltage difference U_ of I bus secondary circuit and II bus secondary circuit in the voltage transformer parallel device
A12, U_B12 and U_C12 are respectively less than the setting valve U_SET of secondary circuit in-phase voltage difference.
5. a kind of voltage transformer parallel device according to claim 1 and its automatic Synchronization control logic, its feature exist
In：The chip model of the arm processor in the CPU card is MB9BF618S.
6. a kind of voltage transformer parallel device according to claim 1 and its automatic Synchronization control logic, its feature exist
In：Network communications circuits in the CPU card include 2 road RS485 EBIs and 2 road RJ45 Ethernet interfaces, wherein
, for SN65LBC184D, the chip model that Ethernet interface is adopted is for DP83849ID for the chip model that RS485 EBIs are adopted.
7. a kind of voltage transformer parallel device according to claim 4 and its automatic Synchronization control logic, its feature exist
In：When the automatic Synchronization control logic, Rule of judgment in claim 4 is met, its corresponding logic state is arranged
For logic 1, when the conditions set forth above are not met, its corresponding logic state is set to into logical zero, when the judgement in claim 4
During all logic 1 of the logic state of condition, the voltage transformer parallel device is defeated after certain delay time T_SET
Go out voltage transformer automatic Synchronization control signal.
8. a kind of voltage transformer parallel device according to claim 4 and its automatic Synchronization control logic, its feature exist
In：The setting range of the I bus secondary circuit and II bus secondary circuit in-phase voltage difference setting valve U_SET is 0V～50V,
The setting range of delay time T_SET be 0.1s ~ 100s, step-length 0.01s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710075134.3A CN106602522A (en) | 2017-02-13 | 2017-02-13 | Voltage transformer parallel apparatus and automatic parallel control logic thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710075134.3A CN106602522A (en) | 2017-02-13 | 2017-02-13 | Voltage transformer parallel apparatus and automatic parallel control logic thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106602522A true CN106602522A (en) | 2017-04-26 |
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ID=58587260
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710075134.3A Pending CN106602522A (en) | 2017-02-13 | 2017-02-13 | Voltage transformer parallel apparatus and automatic parallel control logic thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113866483A (en) * | 2021-10-20 | 2021-12-31 | 国网宁夏电力有限公司宁东供电公司 | Automatic checking method and system for secondary voltage of transformer substation |
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| CN110880892A (en) * | 2019-11-05 | 2020-03-13 | 武汉武水电气技术有限责任公司 | Control system of excitation adjusting device |
| CN113866483A (en) * | 2021-10-20 | 2021-12-31 | 国网宁夏电力有限公司宁东供电公司 | Automatic checking method and system for secondary voltage of transformer substation |
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