CN104965124B - A kind of electronic type synchronizing checking relay - Google Patents
A kind of electronic type synchronizing checking relay Download PDFInfo
- Publication number
- CN104965124B CN104965124B CN201510398305.7A CN201510398305A CN104965124B CN 104965124 B CN104965124 B CN 104965124B CN 201510398305 A CN201510398305 A CN 201510398305A CN 104965124 B CN104965124 B CN 104965124B
- Authority
- CN
- China
- Prior art keywords
- relay
- pin
- voltage
- isolating transformer
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007689 inspection Methods 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Abstract
The present invention relates to a kind of electronic type synchronizing checking relay of turbine-generator units,The relay includes isolating transformer TV1,Isolating transformer TV2,Rectifier bridge,Comparator LM393,Voltage reference circuit,Phase inverter ULN2003 and lock-on relay TJ,The secondary voltage signal for coming self generator and power network connects isolating transformer TV1 respectively,Isolating transformer TV2,Isolating transformer TV1,Two Same Name of Ends UNIT I and GRID I of isolating transformer TV2 secondary side output are connected,The input of secondary side output end UNIT I+ and GRID I+ access rectifier bridges,The output filter circuit of rectifier bridge is made up of C20 ~ C22,The inspection relay of the present invention can be accurately to generator and line voltage,Frequency is compared,Make grid-connected fast and stable.
Description
Technical field
The present invention relates to a kind of grid-connected synchronizing checking relay of frequency measurement of turbine-generator units.
Background technology
Turbine-generator units need the electric voltage frequency of measurement generating set in real time during start is grid-connected, and track electricity
Net frequency, to realize that unit is synchronous with power network and arranged side by side.Synchronizing checking relay is that the voltage signal of unit and power network is entered
Row com-parison and analysis, to export an accurate grid-connected switching signal.Current conventional sync check device is simply simple
Machine frequency signal is connected with net frequency signal circuit and carries out voltage-phase comparison, and the voltage difference compared is directly accessed electromagnetism relay
Device coil, the switching signal of breaker is controlled by the output contact of relay.But due to the shadow by generator itself higher hamonic wave
Ring, the voltage input signal that waveform produces distortion electromagnetic relay tends not to the voltage-phase for reflecting true generator and power network
Difference and voltage difference, easily cause lock-on relay to malfunction and send the switching signal of mistake.In addition, when generator and power network
When voltage difference is in the critical point of lock-on relay action, the output contact of relay also rather unstable, is turning on and disconnecting
Between frequently toggle, easily causing to close a floodgate is malfunctioned, and impact is produced to generating set and power network.
The content of the invention
In order to overcome disadvantages described above existing for conventional sync check device, the purpose of patent of the present invention is to provide a kind of electronics
Formula synchronizing checking relay, the inspection relay accurately can be compared to generator and line voltage, frequency, be made grid-connected fast
Speed is stable.
In order to realize above-mentioned purpose, present invention employs following technical scheme：
A kind of electronic type synchronizing checking relay, the relay include isolating transformer TV1, isolating transformer TV2, rectification
Bridge, comparator LM393, voltage reference circuit, phase inverter ULN2003 and lock-on relay TJ, come the two of self generator and power network
Secondary voltage signal connects isolating transformer TV1, isolating transformer TV2, isolating transformer TV1, the two of isolating transformer TV2 respectively
Two Same Name of Ends UNIT I- and GRID I- of secondary side output are connected, and secondary side output end UNIT I+ and GRID I+ accesses are whole
Flow the input of bridge, the output filter circuit of rectifier bridge is made up of C20 ~ C22, the output voltage CK+ of rectifier bridge through resistance R23,
After resistance R24 bleeder circuit partial pressures, via resistance R21 connection comparators LM393 pin 3, when generator and the secondary electricity of power network
When pressing signal phase identical with amplitude, the voltage of input comparator LM393 pin 3 is 0；The reference of described voltage reference circuit
The pin 2 of adjustable output end of the voltage through adjustable resistance RT1, resistance R20 input comparators LM393, voltage reference circuit is by 24V electricity
Source Vcc is in series through resistance R25, adjustable resistance RT1, resistance R26, when the input comparator LM393 voltage of pin 3 is more than input
During the reference voltage of comparator LM393 pin 2, high level is exported, otherwise pin 1 then exports low level；Comparator LM393 pin 1
It is connected after output signal TJJ1A input ULN2003 inverters with lock-on relay TJ actuation coils, the other end of coil
24V power supplys are connect, the actuating of relay when LM393 pin 1 exports low level, relay output contact is connected grid-connected closing operation and returned
Road.
As a further improvement, the described comparator LM393 output signal TJJ1A of pin 1 sets wire jumper JP1 by connecting
It is connected with ULN2003 phase inverters.
As a further improvement, described phase inverter ULN2003 pin 9 is connected with test switch S1 one end, test
S1 other end ground connection is switched, when test switch S1 is connected, phase inverter output pin 10 ~ 16 exports low level.
As a further improvement, the inspection relay also include LED light emitting diodes L10, LED light emitting diode L11 and
LED light emitting diodes L12, LED light emitting diode L10 is that power supply normally indicates；LED light emitting diodes L11 is that circuit works just
Often instruction；LED light emitting diodes L12 is lock-on relay action instruction.
The present invention drops through isolating transformer first as a result of above-mentioned technical scheme, generator and mains voltage signal
It is in isolating transformer secondary side that generator voltage isolating transformer output end and line voltage isolating transformer is defeated after pressure isolation
Go out end to be in series, series system is that two isolating transformer secondary side Same Name of Ends are connected, two isolating transformer output voltages
Signal into rectification circuit becomes d. c. voltage signal after being concatenated, filtered, amplitude limit, the d. c. voltage signal input
The input port of LM393 comparators is compared with the reference voltage in reference voltage loop, when the d. c. voltage signal is more than
Output end during reference voltage in LM393 comparators exports high level, and the output high level signal is through ULN2003 phase inverters
The coil input end of synchronous electromagnetic relay is inputted after reverse-phase, another input of synchronous electromagnetic relay coil then connects
24V power supplys, when the coil input end that synchronous electromagnetic relay is inputted after inverted device is low level, synchronous electromagnetic relay band
Electricity, output contact action, the closing coil operation circuit of output contact series connection access main-generator breaker, then it can control
Generator is connected to the grid.The inspection relay of the present invention accurately can be compared to generator and line voltage, frequency, be made simultaneously
Net fast and stable.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the present invention.
Embodiment
The embodiment of the present invention is made a detailed explanation below in conjunction with the accompanying drawings.
As shown in figure 1, come the secondary voltage signal of self generator and power network first through isolating transformer TV1, TV2 decompression every
From isolating transformer no-load voltage ratio is 220/24V, two Same Name of Ends UNIT I- and the GRID I- that TV1, TV2 secondary side are exported
It is connected, machine frequency TV1, TV2 secondary side output end UNIT I+ and GRID I+ is accessed to the input of rectifier bridge, rectifier bridge
Output filter circuit is made up of C20 ~ C22, the output voltage CK+ of rectifier bridge after resistance R23, R24 bleeder circuit partial pressure, via
Resistance R21 input comparators LM393 pin 3.When generator is identical with amplitude with the secondary voltage signal phase of power network, input
The voltage of comparator LM393 pin 3 is 0.Adjustable output end of the reference voltage of voltage reference circuit through adjustable resistance RT1, electricity
R20 input comparators LM393 pin 2 is hindered, voltage reference circuit is by 24V power Vccs through resistance R25, adjustable resistance RT1, resistance
R26 is in series.It is defeated when the reference voltage of pin 2 of the input comparator LM393 voltage of pin 3 more than input comparator LM393
Go out high level, otherwise pin 1 then exports low level.The comparator LM393 output signal TJJ1A of pin 1 inputs through wire jumper JP1
Be connected after ULN2003 inverters with lock-on relay TJ actuation coils, another termination 24V power supplys of coil, it is synchronous after
Two ends of an electrical equipment TJ actuation coils reverse fly-wheel diode in parallel, for eliminating overvoltage caused by coil blackout.When
Actuating of relay when LM393 pin 1 exports low level, relay output contact connect grid-connected closing operation loop.
The operation condition of lock-on relay is that the phase difference of generator voltage phase and electric network voltage phase is not more than 30 °,
Because the no-load voltage ratio of isolation change is 220/24V, output voltage is about 12V when isolation becomes input voltage 110V, so when the electromechanics that generates electricity
Press phase advanced or hysteresis electric network voltage phase difference is 30.Within when, the voltage difference of the two also should be less than 8.5V, and the voltage is through whole
The value is about 9.5V after stream filtering, is accordingly adjusted to the reference output voltage of voltage reference circuit by adjustable resistance RT1
9.5V left and right.
In addition, the output voltage CK+ of rectifier bridge is after resistance R23, R24 bleeder circuit partial pressure, via resistance R21 also simultaneously
Input comparator LM393 pin 6.Adjustable output end of the reference voltage of voltage reference circuit through adjustable resistance RT1, resistance R20
Also simultaneously input comparator LM393 pin 5, when the signal voltage of input comparator LM393 pins 6 is less than input comparator
During the reference voltage of LM393 pin 5, pin 7 exports high level, otherwise pin 7 then exports low level.Comparator LM393 pin 7
Output signal TJJ1B is connected after wire jumper JP1 inputs ULN2003 inverters with lock-on relay TJ actuation coils.This
Sample can select any road signal output of two comparators in LM393 to access phase inverter by wire jumper JP1.It is simultaneously as defeated
Enter the input that the CK+ voltage signals of two comparators and reference voltage signal in LM393 are positive and negative opposite access comparators,
So the output of two comparators is also anti-phase, so sum operation closing circuit is wanted in the output contact of lock-on relay
Design aspect has greater flexibility.
Phase inverter ULN2003 pin 9 is connected with test switch S1 one end, test switch S1 other end ground connection, when
When test switch S1 is connected, phase inverter output pin 10 ~ 16 exports low level, can so test lock-on relay action and work
Whether power supply is normal.
LED light emitting diodes L10 is that power supply normally indicates；LED light emitting diodes L11 is circuit instruction working properly；LED
Light emitting diode L12 is lock-on relay action instruction.
Claims (4)
1. a kind of electronic type synchronizing checking relay, the relay includes isolating transformer TV1, isolating transformer TV2 and synchronization
Relay TJ, the secondary voltage signal for coming self generator and power network connect isolating transformer TV1, isolating transformer TV2 respectively, its
It is characterised by, the relay also includes rectifier bridge, comparator LM393, voltage reference circuit and phase inverter ULN2003, and isolation becomes
Two Same Name of Ends UNIT I- and the GRID I- that depressor TV1, isolating transformer TV2 secondary side export are connected, and secondary side is defeated
Go out to hold the input of UNIT I+ and GRID I+ access rectifier bridges, the output filter circuit of rectifier bridge is made up of C20 ~ C22, rectification
The output voltage CK+ of bridge is after resistance R23, resistance R24 bleeder circuit partial pressures, via resistance R21 connection comparators LM393 pin
3, when generator is identical with amplitude with the secondary voltage signal phase of power network, the voltage of input comparator LM393 pin 3 is 0；
Adjustable output end of the reference voltage of described voltage reference circuit through adjustable resistance RT1, resistance R20 input comparators LM393
Pin 2, voltage reference circuit is in series by 24V power Vccs through resistance R25, adjustable resistance RT1, resistance R26, when input ratio
During the reference voltage of pin 2 of the voltage of pin 3 more than input comparator LM393 compared with device LM393, high level is exported, otherwise pin 1 is then defeated
Go out low level；Moved after the comparator LM393 output signal TJJ1A of pin 1 input ULN2003 inverters with lock-on relay TJ
It is connected as coil, another termination 24V power supplys of coil, the actuating of relay when LM393 pin 1 exports low level, relay
Output contact connects grid-connected closing operation loop.
A kind of 2. electronic type synchronizing checking relay according to claim 1, it is characterised in that comparator LM393 pin 1
Output signal TJJ1A sets wire jumper JP1 to be connected with ULN2003 phase inverters by connecting.
A kind of 3. electronic type synchronizing checking relay according to claim 1, it is characterised in that phase inverter ULN2003 pipe
Pin 9 is connected with test switch S1 one end, test switch S1 other end ground connection, and when test switch S1 is connected, phase inverter is defeated
Go out pin 10 ~ 16 and export low level.
A kind of 4. electronic type synchronizing checking relay according to claim 1, it is characterised in that:The inspection relay also wraps
It is power supply to include LED light emitting diode L10, LED light emitting diode L11 and LED light emitting diode L12, LED light emitting diodes L10
Normal instruction；LED light emitting diodes L11 is circuit instruction working properly；LED light emitting diodes L12 acts for lock-on relay
Instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398305.7A CN104965124B (en) | 2015-07-03 | 2015-07-03 | A kind of electronic type synchronizing checking relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398305.7A CN104965124B (en) | 2015-07-03 | 2015-07-03 | A kind of electronic type synchronizing checking relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104965124A CN104965124A (en) | 2015-10-07 |
| CN104965124B true CN104965124B (en) | 2018-01-19 |
Family
ID=54219166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510398305.7A Active CN104965124B (en) | 2015-07-03 | 2015-07-03 | A kind of electronic type synchronizing checking relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104965124B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717142A (en) * | 2018-05-31 | 2018-10-30 | 南京协澳智能控制系统有限公司 | A kind of digital synchronous inspection relay with phase angle compensation function |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2919261Y (en) * | 2006-03-15 | 2007-07-04 | 宋益群 | AC current and voltage measuring circuit adopting AC sampling |
| CN101944749A (en) * | 2010-09-29 | 2011-01-12 | 上海海事大学 | Parallel running controller of fully-digital shipboard generator and method |
| CN102611183A (en) * | 2012-03-01 | 2012-07-25 | 珠海天兆新能源技术有限公司 | Method for detecting and protecting isolated island of grid-connected power generation system |
| CN202503202U (en) * | 2011-12-23 | 2012-10-24 | 彩虹彩色显像管总厂 | Debugging apparatus for relay protection device |
| CN202633968U (en) * | 2012-06-04 | 2012-12-26 | 重庆电力高等专科学校 | Synchronous generator experiment device |
| CN103311907A (en) * | 2013-03-23 | 2013-09-18 | 南京科明自动化设备有限公司 | Synchronizing checking relay and angle locking method of synchronizing checking relay |
| CN104198853A (en) * | 2014-08-27 | 2014-12-10 | 江苏科技大学 | Wind power grid integration testing device and testing method |
| CN204731313U (en) * | 2015-07-03 | 2015-10-28 | 杭州思绿能源科技有限公司 | A kind of electronic type synchronizing checking relay |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140063662A1 (en) * | 2012-08-27 | 2014-03-06 | Eco Power Design LLC | Solar panel, power inverter, theft and arc protection system and methods of protection |
-
2015
- 2015-07-03 CN CN201510398305.7A patent/CN104965124B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2919261Y (en) * | 2006-03-15 | 2007-07-04 | 宋益群 | AC current and voltage measuring circuit adopting AC sampling |
| CN101944749A (en) * | 2010-09-29 | 2011-01-12 | 上海海事大学 | Parallel running controller of fully-digital shipboard generator and method |
| CN202503202U (en) * | 2011-12-23 | 2012-10-24 | 彩虹彩色显像管总厂 | Debugging apparatus for relay protection device |
| CN102611183A (en) * | 2012-03-01 | 2012-07-25 | 珠海天兆新能源技术有限公司 | Method for detecting and protecting isolated island of grid-connected power generation system |
| CN202633968U (en) * | 2012-06-04 | 2012-12-26 | 重庆电力高等专科学校 | Synchronous generator experiment device |
| CN103311907A (en) * | 2013-03-23 | 2013-09-18 | 南京科明自动化设备有限公司 | Synchronizing checking relay and angle locking method of synchronizing checking relay |
| CN104198853A (en) * | 2014-08-27 | 2014-12-10 | 江苏科技大学 | Wind power grid integration testing device and testing method |
| CN204731313U (en) * | 2015-07-03 | 2015-10-28 | 杭州思绿能源科技有限公司 | A kind of electronic type synchronizing checking relay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104965124A (en) | 2015-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106199477B (en) | Circuit, self-checking circuit, AFCI and photovoltaic generating system occur for noise | |
| CN106373764B (en) | A kind of distribution transformer loaded capacity regulating voltage regulating system | |
| CN102013793A (en) | Novel method for triggering thyristor for converter valve module test | |
| CN202770942U (en) | Electric-fire monitoring detector, and failure detecting circuit for residual current sensor of same | |
| CN109581168A (en) | A kind of converter power transformer In situ DC partial discharge test system and method | |
| CN106685385A (en) | Contactless contactor having open-house protection function with no ground wire or neutral wire and silicon controlled rectifier breakdown alarm function | |
| CN104965124B (en) | A kind of electronic type synchronizing checking relay | |
| CN102508155A (en) | Test circuit for internally installed load switch of intelligent electric energy meter | |
| CN103235256A (en) | Isolation detecting device and method of switch on-and-off states | |
| CN106680566B (en) | A kind of spark gap insulation recovery voltage check device and its detection method | |
| CN204731313U (en) | A kind of electronic type synchronizing checking relay | |
| CN104022697A (en) | Constant current source driving module for stepping motor of engine | |
| CN201584953U (en) | Single-phase alternating current contactor consisting of low loss alternating current electronic switch circuit | |
| CN207352129U (en) | A kind of current zero-crossing point closing device of low-voltage circuit breaker characteristic test | |
| CN102624102A (en) | Power supplying circuit and power supplying method for chain-type SVG (static var generator) modules | |
| CN106229963B (en) | A kind of silicon-controlled control circuit mostly changed to crush-cutting | |
| CN105486936B (en) | Uninterruptible power supply with scarce zero curve detection circuit | |
| CN201514450U (en) | Drawer module testing device and drawer module testing system | |
| CN105004908B (en) | Single hot voltage zero crossing detection device and detection method | |
| CN101267197A (en) | Control device and control method for reducing average drive current of silicon controlled rectifier | |
| CN204360259U (en) | The electric instrument pick-up unit of a kind of electronic pressure controller circuit and formation thereof | |
| CN203365596U (en) | Intelligent microcomputer relay protection rapid testing device | |
| CN203243054U (en) | Intelligent low-voltage filter compensation module | |
| CN206947259U (en) | A kind of circuit of protective relay | |
| CN207181660U (en) | A kind of battery charge monitor testboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 310012 14th floor, No. 122 Xueyuan Road, Xihu District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Silu Digital Technology Co.,Ltd. Country or region after: China Address before: 310012 14th floor, No. 122 Xueyuan Road, Xihu District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU SILV ENERGY TECHNOLOGY Co.,Ltd. Country or region before: China |