CN202004474U - Microcomputer automatic quasi-synchronizing device - Google Patents
Microcomputer automatic quasi-synchronizing device Download PDFInfo
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- CN202004474U CN202004474U CN2011201349581U CN201120134958U CN202004474U CN 202004474 U CN202004474 U CN 202004474U CN 2011201349581 U CN2011201349581 U CN 2011201349581U CN 201120134958 U CN201120134958 U CN 201120134958U CN 202004474 U CN202004474 U CN 202004474U
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Abstract
The utility model relates to a microcomputer automatic quasi-synchronizing device, which is characterized in that system voltage is divided into two loops of voltage to enter a control unit, wherein one loop of voltage enters the control unit through a first shaping isolation circuit, and the other loop of voltage enters the control unit sequentially through a first shaping filter circuit and a first photoelectric isolation circuit; terminal voltage of a power generator is divided into two loops of voltage to enter the control unit, wherein one loop of voltage enters the control unit through a second shaping isolation circuit and the other loop of voltage enters the control unit sequentially through a second shaping filter circuit and a second photoelectric isolation circuit; and the control unit drives a digital synchrometer circuit through a first drive circuit, drives a nixie tube display circuit through a second drive circuit and drives a closing output circuit through an isolation drive circuit, the control unit is respectively connected with a keyboard circuit and a communication unit, and circuit breaker feedback signals enter the control unit through a third photoelectric isolation circuit. The microcomputer automatic quasi-synchronizing device can be widely used in all kinds of industrial control systems, frequency measurement is accurate and errorless, real-time performance is good, a self-testing function is provided and safer and more reliable closing operation is ensured.
Description
Technical field
The utility model relates to a kind of, particularly relate to a kind of electric power system parallel operation that is used for, by control treat and system's set speed adjustment, pressure regulation realize frequency and voltage from motion tracking, make frequency difference, pressure reduction enter the scope that allow the accurate same period as early as possible, the circuit breaker that can accurately finish the some same period carries out the microcomputer automatic sub-synchronous device of closing operation.
Background technology
In electric power system, some is called as the circuit breaker of same period point when carrying out closing operation, and the two ends of circuit breaker all might the different electric system power supply of reason and charged.At this moment, just must carry out a series of operation, finally could be with breaker closing.This a series of operation adds that breaker switching-on operation is referred to as parallel operation.
The same period, the parallel operation of point was main content of operation in the electric power system.Because all there is power supply at the two ends of circuit breaker, if the same period, the combined floodgate of point breaker was inappropriate opportunity, the electrical quantity at two ends differs bigger, just will cause circuit breaker blast even whole power system stability destruction and cause collapse, the great serious accident that occurrence of large-area has a power failure.
The function that not choose the right moment automatically traditional manual same period, combined floodgate is difficult to hold opportunity, so to having relatively high expectations of operating personnel, operating personnel's unsuccessful incident of repeatedly closing a floodgate often appears, this device has overcome above-mentioned shortcoming, adopt full automatic mode, check condition arranged side by side, when treat and the frequency of unit, when voltage all satisfies condition in parallel, switching-in control unit sends switching signal with regard to selecting the suitable time, when the main contact of circuit breaker arranged side by side was connected, phase angle difference was near 0 or be controlled within the allowed band.
Summary of the invention
Technical problem to be solved in the utility model is, provides a kind of and can realize the unit numerical control, also can realize the microcomputer automatic sub-synchronous device of team control with the computer interface networking.
The technical scheme that the utility model adopted is: a kind of microcomputer automatic sub-synchronous device, include control unit, system voltage divides two-way to enter control unit, the first shaping buffer circuit of wherein leading up to enters control unit, and another road enters control unit by first plastic filter circuit and first photoelectric isolating circuit successively; Generator voltage divides two-way to enter control unit, and the second shaping buffer circuit of wherein leading up to enters control unit, and another road enters control unit by second plastic filter circuit and second photoelectric isolating circuit successively; Described control unit drives the digital synchronous watch circuit by first drive circuit, drive the charactron display circuit by second drive circuit, drive the combined floodgate output circuit by isolated drive circuit, described control unit also connects keyboard circuit and communication unit respectively, and the circuit breaker feedback signal enters control unit by the 3rd photoelectric isolating circuit.
The described first shaping buffer circuit is identical with the circuit structure of the second shaping buffer circuit, respectively is to be made of an operational amplifier.
Described first plastic filter circuit includes resistance R 50 and the resistance R 52 that is in series, and operational amplifier, wherein, the other end connected system voltage of resistance R 50, the other end concatenation operation amplifier's inverting input of resistance R 52, the tie point of resistance R 50 and resistance R 52 is by capacitor C 5 ground connection, the inverting input of operational amplifier is also by capacitor C 6 ground connection, be connected with the diode VD1A and the diode VD1B of reverse parallel connection between the in-phase input end of operational amplifier and the inverting input, the in-phase input end of described operational amplifier also connects power supply by resistance R 53, and also connects first photoelectric isolating circuit by resistance R 54 with output; The circuit of described second plastic filter circuit constitutes with the circuit formation of first plastic filter circuit identical.
Described first photoelectric isolating circuit is identical with the circuit structure of second photoelectric isolating circuit, respectively is to be made of a photoisolator.
Described first drive circuit includes first chip for driving, the signal input part of described first chip for driving connects the signal output part of control unit, and the signal output part of first chip for driving respectively connects and composes the light-emitting diode of digital synchronous watch circuit by a resistance correspondence.
Described second drive circuit includes second chip for driving, the signal input part of described second chip for driving connects the signal output part of control unit, and the signal output part of chip for driving respectively connects and composes a plurality of digital display tube of charactron display circuit by a resistance correspondence.
Described the 3rd photoelectric isolating circuit includes photoisolator, and the input of described photoisolator connects the circuit breaker feedback signal, and the output of described photoisolator connects control unit.
Described communication unit includes the communication chip that links to each other with control unit, with the photoelectric isolating circuit that links to each other with communication chip.
Described isolated drive circuit includes a plurality of photoisolators that input links to each other with control unit, the output of described a plurality of photoisolators connects the input of Darlington transistor array, the a plurality of relay coils of the corresponding connection of the output of described Darlington transistor, the switch contact of described a plurality of relay coils constitutes the combined floodgate output circuit, and the switch contact of described a plurality of relay coils also connects the light-emitting diode in the digital synchronometer circuit.
Microcomputer automatic sub-synchronous device of the present utility model has following characteristics:
1, key control unit adopts Imported High-performance digital signal controller (DSC), and the controlled function that this controller is integrated single-chip microcomputer (MCU) and the computing capability of digital signal processor (DSP) can be widely used in the various industrial control systems.
2, adopt body high-speed programmable counter array (PCA) frequency measurement, digital phase-locked loop adds the software digital filter technology, and frequency measurement is accurate, and real-time is good.
3, have from trying function, before the combined floodgate that really is incorporated into the power networks, can measure leading time by this device earlier, it is more safe and reliable to guarantee to close a floodgate.
4, have the RS232 communication interface, adopt the Modbus communications protocol, the convenient Control of Power Plant network that inserts.
Description of drawings
Fig. 1 is that integrated circuit of the present utility model constitutes block diagram;
Fig. 2 is the circuit theory diagrams of the utility model MCU and drive circuit;
Fig. 3 is the circuit theory diagrams of the utility model digital synchronometer;
Fig. 4 is the circuit theory diagrams that the utility model charactron shows;
Fig. 5 is the circuit theory diagrams of the utility model the 3rd photoelectric isolating circuit;
Fig. 6 is the utility model communication interface circuit theory diagrams;
Fig. 7 is the utility model keyboard circuit schematic diagram;
Fig. 8 is the utility model isolated drive circuit and the circuit theory diagrams that drive the combined floodgate output circuit;
Fig. 9 is the adjust circuit theory diagrams of circuit of the signal of the utility model control unit input.
Wherein: the 1-control unit; The 2-system voltage; The 3-generator voltage; The 4-first shaping buffer circuit; The 5-second shaping buffer circuit; 6-first plastic filter circuit; 7-second plastic filter circuit; 8-first photoelectric isolating circuit; 9-second photoelectric isolating circuit; 10-first drive circuit; 11-second drive circuit; The 12-keyboard circuit; The 13-communication unit; 14-the 3rd photoelectric isolating circuit; The 15-isolated drive circuit; 16-digital synchronous watch circuit; 17-charactron display circuit; 18-circuit breaker feedback signal; 19-combined floodgate output circuit.
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify microcomputer automatic sub-synchronous device of the present utility model and how to realize.
As shown in Figure 1, microcomputer automatic sub-synchronous device of the present utility model, include control unit 1,2 fens two-way of system voltage enter control unit 1, the first shaping buffer circuit 4 of wherein leading up to enters control unit 1, and another road enters control unit 1 by first plastic filter circuit 6 and first photoelectric isolating circuit 8 successively; 3 fens two-way of generator voltage enter control unit 1, and the second shaping buffer circuit 5 of wherein leading up to enters control unit 1, and another road enters control unit 1 by second plastic filter circuit 7 and second photoelectric isolating circuit 9 successively; Described control unit 1 drives digital synchronous watch circuit 16 by first drive circuit 10, drive charactron display circuit 17 by second drive circuit 11, drive combined floodgate output circuit 19 by isolated drive circuit 15, described control unit 1 also connects keyboard circuit 12 and communication unit 13 respectively, and circuit breaker feedback signal 18 enters control unit 1 by the 3rd photoelectric isolating circuit 14.
As Fig. 2, shown in Figure 3, described control unit 1 adopts MCU chip D1, and it is the chip of DSPIC6012A that described MCU chip D1 can adopt model.
Described first drive circuit 10 includes the first chip for driving D2, and can adopt model is the chip of 74LS573.The signal input part of the described first chip for driving D2 connects the signal output part of control unit 1, and the signal output part of the first chip for driving D2 respectively connects and composes light-emitting diode in the digital synchronous watch circuit 13 by a resistance correspondence.As shown in Figure 3, described light-emitting diode has 7 groups of light-emitting diodes, wherein has also corresponding 6 triodes that pass through in the charactron display circuit 15 shown in Figure 4 of 5 groups of light-emitting diodes to connect MCU chip D1.
As Fig. 2, shown in Figure 4, described second drive circuit 11 includes the second chip for driving D3, and can adopt model is the chip of 74LS573.The signal input part of the described second chip for driving D3 connects the signal output part of control unit 1, and the signal output part of chip for driving D3 respectively connects and composes a plurality of digital display tube of charactron display circuit 15 by a resistance correspondence.As shown in Figure 4, described digital display tube is provided with 4, and model is 3641A, and these 4 digital display tubes are except linking to each other with the second chip for driving D3, and also corresponding respectively simultaneously 16 triodes that pass through connect MCU chip D1.
As shown in Figure 5, described the 3rd photoelectric isolating circuit 14 includes photoisolator BO6, the input CB of described photoisolator BO6 connects circuit breaker feedback signal 18 by resistance R 46, and the output DI1 of described photoisolator BO6 connects control unit 1.
As shown in Figure 6, described communication unit 13 includes the communication chip MAX232 (D4) that links to each other with control unit 1, with the photoelectric isolating circuit that links to each other with communication chip D4, described photoelectric isolating circuit is to be made of two photoisolator BO9, BO10, and the output of described two photoisolator BO9, BO10 respectively connects a LED 1, LED2.
As shown in Figure 7, described keyboard circuit 12 includes three button BT1, BT2, the BT3 that links to each other with control unit 1, what described three button BT1, BT2, BT3 were corresponding respectively is in parallel with an electric capacity, end ground connection after the parallel connection, the other end connects control unit 1, and this end that connects control unit also connects DC power supply by a resistance.
As Fig. 8, shown in Figure 3, isolated drive circuit 15 as described in Figure includes a plurality of photoisolator BO1～BO5 that input links to each other with control unit 1, the output of described a plurality of photoisolator BO1～BO5 connects the input of Darlington transistor array D5, it is the Darlington transistor of VLN2803 that described Darlington transistor D5 can adopt model, the a plurality of relay coil KA1A～KA5A of the corresponding connection of its output, as shown in Figure 8,5 switch contact KA1B of described a plurality of relay coil KA1A～KA5A, KA2B, KA3B, KA4B, KA5B constitutes combined floodgate output circuit 19,4 switch contact KA1C of described a plurality of relay coil KA1A～KA5A, KA2C, KA3C, also corresponding 4 LEDs 34 that connect in the digital synchronometer 13 of KA4C, LED35, LED36, LED37.
As shown in Figure 9, the described first shaping buffer circuit 4 is identical with the circuit structure of the second shaping buffer circuit 5, all is to be made of an operational amplifier U1B/U2B.
Described first plastic filter circuit 6 includes resistance R 50 and the resistance R 52 that is in series, and operational amplifier U1A, wherein, the other end connected system voltage 2 of resistance R 50, the inverting input of the other end concatenation operation amplifier U1A of resistance R 52, the tie point of resistance R 50 and resistance R 52 is by capacitor C 5 ground connection, the inverting input of operational amplifier U1A is also by capacitor C 6 ground connection, be connected with the diode VD1A and the diode VD1B of reverse parallel connection between the in-phase input end of operational amplifier U1A and the inverting input, the in-phase input end of described operational amplifier U1A also connects power supply by resistance R 53, and also connects first photoelectric isolating circuit 8 by resistance R 54 with output; The circuit of described second plastic filter circuit 7 constitutes with the circuit formation of first plastic filter circuit 6 identical.
Described first photoelectric isolating circuit 8 is identical with the circuit structure of second photoelectric isolating circuit 9, all is to be made of a photoisolator BO7/BO8.
Microcomputer automatic sub-synchronous device of the present utility model, the AC signal waveform that collects become square wave after, carry out the measurement at frequency and phase angle, calculate the rate of change of frequency again by single-chip microcomputer.By control treat and system's set speed adjustment, pressure regulation realize frequency and voltage from motion tracking, make frequency difference, pressure reduction enter the scope that allow the accurate same period as early as possible, average per half power frequency period is measured phase angle difference, the utlity model has charactron and shows, is convenient to monitor setting and modification with parameter.After the device power down, parameter can not lost.Device can use separately, also can be used with supervisory control system, realizes the remote control synchronous device.This device also has from trying function simultaneously.
Microcomputer automatic sub-synchronous device of the present utility model, the speciality of performance single chip microcomputer, and the technical characterstic of being convenient to realize controls such as precision height, function are strong, highly reliable, easy to operate.AC sampling and strict computing technique, accurately voltage, frequency and the phase angle difference of compute switch both sides quickly and accurately; I/O photoelectricity is isolated, and adopts the quick auxiliary relay of inlet seal to switch as close a floodgate output and voltage, and the antijamming capability of device is strong, advanced technology.This device has certainty of measurement height, good stability, reliability height, function is strong, adjustment is flexible, simple to operate, advantages such as easy are installed.Can realize the unit numerical control, also can realize team control with the computer interface networking.Can improve power generating quality, the conserve water resource.
Claims (9)
1. microcomputer automatic sub-synchronous device, it is characterized in that, include control unit (1), system voltage (2) divides two-way to enter control unit (1), the first shaping buffer circuit (4) of wherein leading up to enters control unit (1), and another road enters control unit (1) by first plastic filter circuit (6) and first photoelectric isolating circuit (8) successively; Generator voltage (3) divides two-way to enter control unit (1), the second shaping buffer circuit (5) of wherein leading up to enters control unit (1), and another road enters control unit (1) by second plastic filter circuit (7) and second photoelectric isolating circuit (9) successively; Described control unit (1) drives digital synchronous watch circuit (16) by first drive circuit (10), drive charactron display circuit (17) by second drive circuit (11), drive combined floodgate output circuit (19) by isolated drive circuit (15), described control unit (1) also connects keyboard circuit (12) and communication unit (13) respectively, and circuit breaker feedback signal (18) enters control unit (1) by the 3rd photoelectric isolating circuit (14).
2. microcomputer automatic sub-synchronous device according to claim 1 is characterized in that, the described first shaping buffer circuit (4) is identical with the circuit structure of the second shaping buffer circuit (5), and each is made of an operational amplifier (U1B/U2B).
3. microcomputer automatic sub-synchronous device according to claim 1, it is characterized in that, described first plastic filter circuit (6) includes resistance R 50 and the resistance R 52 that is in series, and operational amplifier (U1A), wherein, the other end connected system voltage (2) of resistance R 50, the inverting input of the other end concatenation operation amplifier (U1A) of resistance R 52, the tie point of resistance R 50 and resistance R 52 is by capacitor C 5 ground connection, the inverting input of operational amplifier (U1A) is also by capacitor C 6 ground connection, be connected with the diode VD1A and the diode VD1B of reverse parallel connection between the in-phase input end of operational amplifier (U1A) and the inverting input, the in-phase input end of described operational amplifier (U1A) also connects power supply by resistance R 53, and also connects first photoelectric isolating circuit (8) by resistance R 54 with output; The circuit of described second plastic filter circuit (7) constitutes with the circuit formation of first plastic filter circuit (6) identical.
4. microcomputer automatic sub-synchronous device according to claim 1 is characterized in that, described first photoelectric isolating circuit (8) is identical with the circuit structure of second photoelectric isolating circuit (9), and each is made of a photoisolator (BO7/BO8).
5. microcomputer automatic sub-synchronous device according to claim 1, it is characterized in that, described first drive circuit (10) includes first chip for driving (D2), the signal input part of described first chip for driving (D2) connects the signal output part of control unit (1), and the signal output part of first chip for driving (D2) respectively connects and composes the light-emitting diode of digital synchronous watch circuit (16) by a resistance correspondence.
6. microcomputer automatic sub-synchronous device according to claim 1, it is characterized in that, described second drive circuit (11) includes second chip for driving (D3), the signal input part of described second chip for driving (D3) connects the signal output part of control unit (1), and the signal output part of chip for driving (D3) respectively connects and composes a plurality of digital display tube of charactron display circuit (17) by a resistance correspondence.
7. microcomputer automatic sub-synchronous device according to claim 1, it is characterized in that, described the 3rd photoelectric isolating circuit (14) includes photoisolator (BO6), the input (CB) of described photoisolator (BO6) connects circuit breaker feedback signal (18), and the output (DI1) of described photoisolator (BO6) connects control unit (1).
8. microcomputer automatic sub-synchronous device according to claim 1 is characterized in that, described communication unit (13) includes the communication chip (D4) that links to each other with control unit (1), with the photoelectric isolating circuit that links to each other with communication chip (D4).
9. microcomputer automatic sub-synchronous device according to claim 1, it is characterized in that, described isolated drive circuit (15) includes a plurality of photoisolators that input links to each other with control unit (1) (BO1～BO5), (BO1～output BO5) connects the input of Darlington transistor array (D5) to described a plurality of photoisolator, the a plurality of relay coils of the corresponding connection of the output of described Darlington transistor (D5) (KA1A～KA5A), (switch contact of KA1A～KA5A) constitutes combined floodgate output circuit (21) to described a plurality of relay coil, and (switch contact of KA1A～KA5A) also connects the light-emitting diode in the digital synchronometer circuit (16) to described a plurality of relay coils.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201349581U CN202004474U (en) | 2011-04-29 | 2011-04-29 | Microcomputer automatic quasi-synchronizing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201349581U CN202004474U (en) | 2011-04-29 | 2011-04-29 | Microcomputer automatic quasi-synchronizing device |
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| CN202004474U true CN202004474U (en) | 2011-10-05 |
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| CN2011201349581U Expired - Fee Related CN202004474U (en) | 2011-04-29 | 2011-04-29 | Microcomputer automatic quasi-synchronizing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739085A (en) * | 2012-06-20 | 2012-10-17 | 陕西煤业化工技术研究院有限责任公司 | Inverter phase sequence detection phase locking device and phase locking and phase sequence identifying method |
| CN104076703A (en) * | 2014-06-28 | 2014-10-01 | 柳州市够旺贸易有限公司 | Switch turn-on controller |
| CN105720602A (en) * | 2016-01-21 | 2016-06-29 | 易事特集团股份有限公司 | Photovoltaic grid-connected power generating energy storage inverter grid-connected-off-grid system and operation device thereof |
| CN112701589A (en) * | 2020-12-30 | 2021-04-23 | 上海昱章电气成套设备有限公司 | Circuit breaker cabinet |
-
2011
- 2011-04-29 CN CN2011201349581U patent/CN202004474U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739085A (en) * | 2012-06-20 | 2012-10-17 | 陕西煤业化工技术研究院有限责任公司 | Inverter phase sequence detection phase locking device and phase locking and phase sequence identifying method |
| CN102739085B (en) * | 2012-06-20 | 2014-07-02 | 陕西煤业化工技术研究院有限责任公司 | Inverter phase sequence detection phase locking device and phase locking and phase sequence identifying method |
| CN104076703A (en) * | 2014-06-28 | 2014-10-01 | 柳州市够旺贸易有限公司 | Switch turn-on controller |
| CN105720602A (en) * | 2016-01-21 | 2016-06-29 | 易事特集团股份有限公司 | Photovoltaic grid-connected power generating energy storage inverter grid-connected-off-grid system and operation device thereof |
| CN105720602B (en) * | 2016-01-21 | 2019-02-05 | 易事特集团股份有限公司 | Parallel network power generation energy storage inverter is grid-connected-off-grid system and its running gear |
| CN112701589A (en) * | 2020-12-30 | 2021-04-23 | 上海昱章电气成套设备有限公司 | Circuit breaker cabinet |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20140429 |