CN103353556A - Relay protection device pressboard outlet logic detection apparatus - Google Patents
Relay protection device pressboard outlet logic detection apparatus Download PDFInfo
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Abstract
The invention relates to a relay protection device pressboard outlet logic detection apparatus. The logic detection apparatus comprises a relay protection device outlet pressboard ms-level instantaneous voltage impulse detection circuit, a relay protection test-stand dry contact state detection circuit, a microprocessor, a drive, timing display and sound-light alarm circuit and a power indication and grounding disconnection indication circuit, wherein the output terminals of the relay protection device outlet pressboard ms-level instantaneous voltage impulse detection circuit and the relay protection test-stand dry contact state detection circuit are connected with corresponding input terminals of the microprocessor respectively; the output terminal of the microprocessor is connected with the input terminal of the drive, timing display and sound-light alarm circuit; the input terminal of the power indication and grounding disconnection indication circuit is connected with the output terminal of the drive, timing display and sound-light alarm circuit. The advantages of the logic detection apparatus are that: detection accuracy and sensitivity are high, and wiring and operation are simple.
Description
Technical field
The present invention relates to a kind of protective relaying device pressing plate outlet logic pick-up unit.
Technical background
At present, the relay protection specialty is when carrying out protective relaying device examination and one-hundred-percent inspection work, and it is an important and loaded down with trivial details content that the outlet logic of protective relaying device pressing plate detects.Especially 500kV main transformer protection equipment; face the multiple principle back-up protections such as the tetrameric ground distance of high, medium and low voltage side and public winding, phase to phase impedance, zero sequence direction, zero sequence overcurrent; the back-up protection of each each principle of side divides again three sections of I, II, III; every section is divided again 1,2,3 three time limit, and this has just consisted of the Tripping matrix logic of main transformer protection.Because the configuration of relay protection dual, a main transformer has two cover main transformer protections, nearly 200 kinds of all trip protection logics.In the time of the protection check, if the complete 200 kinds of logics of complete verification need the fault of each logic of simulation, and measure simultaneously all tripping operation output clampings.At least need two people, Yi Bian add the fault simulation amount, measure one by one more than 10 output clamping Yi Bian hold multimeter, one day consuming time altogether.In the face of the larger verification of this workload, continue to use side classification, segmentation in traditional minute and divide time limit, the logic out-of-date methods checked successively of pressing plate one by one one by one, this frequency, repeatability operation not only expend a large amount of manpowers, time, and directly perceived, easily tired causing made mistakes, and had a strong impact on overhaul efficiency and progress.
If adopt the reaying protection test platform, such as equipment such as the rich electricity in Beijing, Guangzhou Onllies, also just possess eight dry contact input functions; but in the situation of main transformer maintenance prerun; the pressing plate upper and lower port is charged, and voltage suitable for reading is-110V that end opening voltage is+110V.Safety practice does not advise that the cutting-off controlling power supply overhauls prerun.So conventional reaying protection test platform is not suitable for measuring the output pulse of charged pressing plate, in working at ordinary times, still generally adopt the artificial hand-held multimeter of wasting time and energy to detect the method for pressing plate outlet.
Summary of the invention
Technical matters to be solved by this invention provides a kind of accuracy in detection and highly sensitive, wiring and protective relaying device pressing plate outlet logic pick-up unit easy and simple to handle.
The present invention solve that concrete technical problems adopts technical scheme:
A kind of protective relaying device pressing plate outlet logic pick-up unit is comprised of the indication of protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit, reaying protection test platform dry contact state detection circuit, microprocessor, driving, timing demonstration and sound light alarming circuit and power supply and ground connection broken string indicating circuit; The output terminal of described protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit and reaying protection test platform dry contact state detection circuit connects respectively the respective input of microprocessor, the input end of the driving of output termination, timing demonstration and the sound light alarming circuit of described microprocessor; The output terminal of the driving of input termination, timing demonstration and the sound light alarming circuit of described voltage indication and ground connection broken string indicating circuit.
Beneficial effect of the present invention is as follows:
(1) in the situation that do not have a power failure; disposablely detect at most simultaneously 10 tripping operation outlets, avoided protection action, switch transmission number of times, prevent frequent deciliter damage that causes of switch; remove switch from and suppress the stand-by period, shortened the time of relay protection maintenance prerun.
(2) wiring of this device is safe and efficient, simple; the work for inspection that needed have two people to spend half a day in the past and could finish simultaneously; at present people's complete independently can be arranged in 2 hours; save the work that people's conjunction measuring output clamping need to be arranged when protective relaying device passes into the fault simulation amount, greatly alleviated the workload that each pressing plate is in the past measured one by one.
(3) this device provides tripping operation outlet sound and light alarm, makes work for inspection more directly perceived, efficient.
(4) this device provides ten passages tripping operation outlet independent clocking capability; totally four of timing digital displays; such as 00.00; timing least unit 0.01s; timing range 0.01s-99.99s; it more accurate recording protection action to the time of tripping operation outlet, further accurate checking relay protection Trip Logic, and the correctness of transformer tripping matrix.
(5) this device accuracy in detection and sensitivity are higher; be applicable to the verification of main transformer protection Tripping matrix logic; also be applicable to the work for inspection of a plurality of tripping operation outlets such as bus protection, route protection, protection device for circuit breaker, greatly improved check progress and the efficient of relay protection of power system integral body.
Description of drawings
Fig. 1 is theory diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 is workflow diagram of the present invention.
Embodiment
By the described embodiment of Fig. 1-3 as can be known, the present embodiment is comprised of the indication of protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit, reaying protection test platform dry contact state detection circuit, microprocessor, driving, timing demonstration and sound light alarming circuit and power supply and ground connection broken string indicating circuit; The output terminal of described protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit and reaying protection test platform dry contact state detection circuit connects respectively the respective input of microprocessor, the input end of the driving of output termination, timing demonstration and the sound light alarming circuit of described microprocessor; The output terminal of the driving of input termination, timing demonstration and the sound light alarming circuit of described voltage indication and ground connection broken string indicating circuit.
Described protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit is comprised of the identical branch road of 10 line structures, and wherein first route voltage comparator U1, photoelectrical coupler N1, resistance R 1-1-R1-4, capacitor C 1-1, diode D1-1 and voltage detecting contact J1 form; Described voltage detecting contact J1 connects the inverting input of voltage comparator U1 through resistance R 1-2, resistance R 1-3 be connected between the inverting input and ground of voltage comparator U1 after diode D1-1 connects, input end 2 pin of the output termination photoelectrical coupler N1 of voltage comparator U1, the power end of voltage comparator U1 and photoelectrical coupler N1 meets respectively VCC2, the in-phase input end of voltage comparator U1 connects+2.5V through resistance R 1-1, and capacitor C 1-1 is connected between the in-phase input end and inverting input of voltage comparator U1; The 3 pin ground connection of described photoelectrical coupler N1, its 4 pin meets VCC through resistance R 1-4; Wherein the 10th route voltage comparator U10, photoelectrical coupler N10, resistance R 10-1-R10-4, capacitor C 10-1, diode D10-1 and voltage detecting contact J10 form.
When the pulse of ms level instantaneous voltage appears in protective relaying device output clamping end opening, and voltage-to-ground is not less than 30V, the at this moment timing of respective channel end.Each branch road instantaneous voltage detetion circuit all works alone, and now the 1st branch road is described:
When the voltage that detects during greater than the reference voltage of the in-phase input end of voltage comparator U1, U1 output LOW voltage, photoelectrical coupler N1 conducting, single-chip microcomputer U11 input low level; When the voltage that detects during less than reference voltage, U1 exports high level, photoelectrical coupler N1 cut-off, single-chip microcomputer U11 input high level.
Reaying protection test platform dry contact state detection circuit is comprised of trigger terminal A and B, photo-coupler N11, resistance R 11-1-R11-4; Described trigger terminal A is through resistance R 11-1 ground connection, described trigger terminal B connects input end 2 pin of photoelectrical coupler N11 through resistance R 11-2, input end 1 pin of described photoelectrical coupler N11 meets VCC2 through resistance R 11-3, the 3 pin ground connection of described photoelectrical coupler N11, and its 4 pin meets VCC through resistance R 11-4.
When the dry contact of reaying protection test platform is closed, trigger terminal A and trigger terminal B connection, optocoupler N11 conducting, single-chip microcomputer U11 input low level, otherwise input high level.
Described microprocessor is comprised of single-chip microcomputer U11 and peripheral cell crystal X1, capacitor C 12-1-C12-3, resistance R 12-1 and reset button S1; Input end 9 pin of described single-chip microcomputer U11 connect output terminal 4 pin of photo-coupler N1, input end 31 pin of described single-chip microcomputer U11 connect output terminal 4 pin of photo-coupler N11, the crystal oscillating circuit that crystal X1 and capacitor C 12-2-C12-3 forms is connected between 15 pin and 16 pin of single-chip microcomputer U11, and the reset circuit that reset button S1, resistance R 12-1 and capacitor C 12-1 form is connected between 13 pin and ground of single-chip microcomputer U11.
Described driving, timing demonstration and sound light alarming circuit are comprised of the identical passage of 10 line structures, and wherein the 1st passage forms by driving chip U12-1, timing chip U12-2, charactron U12-3, sound alarm circuit and optical alarm circuit;
The input end 1-5 pin of described driving chip U12-1 connects respectively the 43-47 pin of single-chip microcomputer U11, and the output terminal 12-15 pin of described driving chip U12-1 connects respectively the DIG4-DIG1 pin of charactron U12-3;
The input end 11-14 pin of described timing chip U12-2 connects respectively output terminal 39 pin, 40 pin, 48 pin and 19 pin of single-chip microcomputer U11, the output terminal 1-7 pin of timing chip U12-2 connects respectively the A-G pin of charactron U12-3, and output terminal 15 pin of timing chip U12-2 connect the DP pin of charactron U12-3;
Described optical alarm circuit is comprised of LED 1-1 and resistance R 14-1, LED 1-1 be connected between the DIG1 pin and DP pin of charactron U12-3 after resistance R 14-1 connects;
Described sound alarm circuit is that described each passage shares, and described sound alarm circuit is comprised of hummer F1 and resistance R 13, hummer F1 be connected between output terminal 16 pin and VCC of driving chip U12-1 after resistance R 13 is connected;
Described the 10th passage is comprised of the sound alarm circuit that drives chip U21-1, timing chip U21-2, charactron U21-3, LED 10-1, resistance R 23-1 and be comprised of hummer F1 and resistance R 13.
Described power supply indication and ground connection broken string indicating circuit are comprised of LED 11-LED12, resistance R 24-R25; The power indicating circuit that is composed in series by LED 11 and resistance R 24 is connected between output terminal 11 pin and VCC that drive chip U21-1; The ground connection broken string indicating circuit that is composed in series by LED 12 and resistance R 25 is connected between output terminal 10 pin and ground that drive chip U21-1.
The model of single-chip microcomputer U11 is STC12C5A32S2, and timing chip U12-2 adopts shift register 74HC595, and the model that drives chip U12-1 is ULN2003.
In the present embodiment, VCC is+5V that VCC2 is+15V.
The course of work of the present invention is as follows:
During this device is used at the scene; at first earthing of casing line and grounding copper bar are connected firmly; then the voltage detecting contact with respective channel is fastened on corresponding output clamping end opening place; trigger terminal A, B are connected on the lead-out terminal (being a pair of dry contact) of reaying protection test platform; then connect this installation's power source, and press involution button S1 and make the zero clearing of timing digital display.When using the reaying protection test platform to add the fault simulation amount to this device; rely on a pair of dry contact to make trigger terminal A; B is closed; start this device clocking capability; at this moment; the time of ten passages is when beginning to walk from 00.00s; until a certain passage detects size be+110V; time is several milliseconds potential pulse; light and keep for one among light alarm lamp LED1-1-LED10-1; hummer F1 sends " dripping---" one; namely recorded the time of tripping operation outlet at the time of respective channel digital display screen; unit is second, minimum timing 0.01s.The passage that other output clamping end openings do not detect potential pulse then continues timing, is several milliseconds potential pulse for+110V, time until respective channel detects size, and the respective channel timing finishes, and the light alarm lamp is lighted maintenance.In this device course of work, press involution button S1, then the time digital display screen of 10 passages all makes zero, the light alarm lamp extinguishes.
The operating ambient temperature of this device :-10 ℃～+ 50 ℃, during normal operation, the power consumption of this device is not more than 40W.In addition, the insulation resistance of this device is not less than 50M, can bear ± the 250V voltge surge (forceful electric power loop), comprises the voltage contact of this device and detects the loop.Weak electrical loop can be born the voltge surge of 50V, comprises that acousto-optic drives loop and timing loop.
This device possesses 4 technical standards:
1, security performance: ten passages are to work alone, and isolation the crosstalk phenomenon can not occur mutually.Detection voltage is forceful electric power, can not cause the short circuit with ground wire, also can not interfere with each other, be connected in series with light current, guarantees between the forceful electric power, between the forceful electric power light current, the isolation between forceful electric power and the ground wire, more can not advance detected protective relaying device to this installation's power source foldback;
2, detect voltage request: the voltage detecting contact can be replaced wire clamp contact, U-shaped contact, pin hole contact (universal), to adapt to the upper and lower opening of variety classes pressing plate.Detection voltage be direct current+30V～+ during 110V, can drive sound and light alarm loop and timing loop.The voltage that detects is less than+30V, and sound and light alarm loop and timing not conducting of loop detect voltage and can reliably escape+30V and following;
3, time precision requires: time showing scope 00.00s～99.99s, and precision 0.01s, error is at ± 0.01s.Catch the time of detecting potential pulse, precision is 1ms;
4, power switch is that the automatic trip sky of currents match is opened, and electric power loop also arranges sizeable current fusing silk (device), and the personnel of preventing injure and install overcurrent and burn.
Claims (6)
1. protective relaying device pressing plate outlet logic pick-up unit is characterized in that being comprised of protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit, reaying protection test platform dry contact state detection circuit, microprocessor, driving, timing demonstration and sound light alarming circuit and power supply indication and ground connection broken string indicating circuit; The output terminal of described protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit and reaying protection test platform dry contact state detection circuit connects respectively the respective input of microprocessor, the input end of the driving of output termination, timing demonstration and the sound light alarming circuit of described microprocessor; The output terminal of the driving of input termination, timing demonstration and the sound light alarming circuit of described voltage indication and ground connection broken string indicating circuit.
2. protective relaying device pressing plate outlet logic pick-up unit according to claim 1, it is characterized in that described protective relaying device output clamping ms level instantaneous voltage pulse-detecting circuit is comprised of the identical branch road of 10 line structures, wherein first route voltage comparator U1, photoelectrical coupler N1, resistance R 1-1-R1-4, capacitor C 1-1, diode D1-1 and voltage detecting contact J1 form; Described voltage detecting contact J1 connects the inverting input of voltage comparator U1 through resistance R 1-2, resistance R 1-3 be connected between the inverting input and ground of voltage comparator U1 after diode D1-1 connects, input end 2 pin of the output termination photoelectrical coupler N1 of voltage comparator U1, the power end of voltage comparator U1 and photoelectrical coupler N1 meets respectively VCC2, the in-phase input end of voltage comparator U1 connects+2.5V through resistance R 1-1, and capacitor C 1-1 is connected between the in-phase input end and inverting input of voltage comparator U1; The 3 pin ground connection of described photoelectrical coupler N1, its 4 pin meets VCC through resistance R 1-4; Wherein the 10th route voltage comparator U10, photoelectrical coupler N10, resistance R 10-1-R10-4, capacitor C 10-1, diode D10-1 and voltage detecting contact J10 form.
3. protective relaying device pressing plate outlet logic pick-up unit according to claim 2 is characterized in that reaying protection test platform dry contact state detection circuit is comprised of trigger terminal A and B, photo-coupler N11, resistance R 11-1-R11-4; Described trigger terminal A is through resistance R 11-1 ground connection, described trigger terminal B connects input end 2 pin of photoelectrical coupler N11 through resistance R 11-2, input end 1 pin of described photoelectrical coupler N11 meets VCC2 through resistance R 11-3, the 3 pin ground connection of described photoelectrical coupler N11, and its 4 pin meets VCC through resistance R 11-4.
4. protective relaying device pressing plate outlet logic pick-up unit according to claim 3 is characterized in that described microprocessor is comprised of single-chip microcomputer U11 and peripheral cell crystal X1, capacitor C 12-1-C12-3, resistance R 12-1 and reset button S1; Input end 9 pin of described single-chip microcomputer U11 connect output terminal 4 pin of photo-coupler N1, input end 31 pin of described single-chip microcomputer U11 connect output terminal 4 pin of photo-coupler N11, the crystal oscillating circuit that crystal X1 and capacitor C 12-2-C12-3 forms is connected between 15 pin and 16 pin of single-chip microcomputer U11, and the reset circuit that reset button S1, resistance R 12-1 and capacitor C 12-1 form is connected between 13 pin and ground of single-chip microcomputer U11.
5. protective relaying device pressing plate outlet logic pick-up unit according to claim 4, it is characterized in that described driving, timing demonstration and sound light alarming circuit are comprised of the identical passage of 10 line structures, wherein the 1st passage forms by driving chip U12-1, timing chip U12-2, charactron U12-3, sound alarm circuit and optical alarm circuit;
The input end 1-5 pin of described driving chip U12-1 connects respectively the 43-47 pin of single-chip microcomputer U11, and the output terminal 12-15 pin of described driving chip U12-1 connects respectively the DIG4-DIG1 pin of charactron U12-3;
The input end 11-14 pin of described timing chip U12-2 connects respectively output terminal 39 pin, 40 pin, 48 pin and 19 pin of single-chip microcomputer U11, the output terminal 1-7 pin of timing chip U12-2 connects respectively the A-G pin of charactron U12-3, and output terminal 15 pin of timing chip U12-2 connect the DP pin of charactron U12-3;
Described optical alarm circuit is comprised of LED 1-1 and resistance R 14-1, LED 1-1 be connected between the DIG1 pin and DP pin of charactron U12-3 after resistance R 14-1 connects;
Described sound alarm circuit is that described each passage shares, and described sound alarm circuit is comprised of hummer F1 and resistance R 13, hummer F1 be connected between output terminal 16 pin and VCC of driving chip U12-1 after resistance R 13 is connected;
Described the 10th passage is comprised of the sound alarm circuit that drives chip U21-1, timing chip U21-2, charactron U21-3, LED 10-1, resistance R 23-1 and be comprised of hummer F1 and resistance R 13.
6. protective relaying device pressing plate outlet logic pick-up unit according to claim 5 is characterized in that described power supply indication and ground connection broken string indicating circuit are comprised of LED 11-LED12, resistance R 24-R25; The power indicating circuit that is composed in series by LED 11 and resistance R 24 is connected between output terminal 11 pin and VCC that drive chip U21-1; The ground connection broken string indicating circuit that is composed in series by LED 12 and resistance R 25 is connected between output terminal 10 pin and ground that drive chip U21-1.
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| CN103399229A (en) * | 2013-07-30 | 2013-11-20 | 国家电网公司 | Testing device for protection outlet of relay protection device |
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| CN104237603A (en) * | 2014-08-28 | 2014-12-24 | 深圳供电局有限公司 | Pulse voltage detecting device for multiple outlet pressing boards of relay protection |
| CN104267333A (en) * | 2014-10-21 | 2015-01-07 | 国家电网公司 | Detector for checking main transformer tripping protection logic loop |
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| CN104267333A (en) * | 2014-10-21 | 2015-01-07 | 国家电网公司 | Detector for checking main transformer tripping protection logic loop |
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| CN105891639B (en) * | 2016-04-22 | 2018-09-25 | 邹平县供电公司 | It is a kind of instruction earth leakage protective device experiment peripheral control circuits, test method |
| CN106405410A (en) * | 2016-11-21 | 2017-02-15 | 广东电网有限责任公司肇庆供电局 | Relay protection exit detection method, relay protection exit detection device and relay protection exit detection system |
| CN106841876A (en) * | 2017-03-27 | 2017-06-13 | 国网福建省电力有限公司 | A kind of monitoring method of relay protection outlet pressing plate |
| CN106841876B (en) * | 2017-03-27 | 2019-07-09 | 国网福建省电力有限公司 | A kind of monitoring method of relay protection outlet pressing plate |
| CN107085162A (en) * | 2017-04-12 | 2017-08-22 | 国家电网公司 | Protection exit pressing plate state monitoring method and system based on peripheral hardware auxiliary contact |
| CN109217854A (en) * | 2017-07-04 | 2019-01-15 | 许继集团有限公司 | It is applicable in the indicating circuit of two kinds of level driving |
| CN109217854B (en) * | 2017-07-04 | 2023-06-02 | 许继集团有限公司 | Indication circuit suitable for two level driving |
| CN108982946A (en) * | 2018-04-28 | 2018-12-11 | 深圳供电局有限公司 | A kind of platen potential change detecting device based on protection act contact |
| CN111864894A (en) * | 2019-04-26 | 2020-10-30 | 中国南方电网有限责任公司 | Remote uninterrupted power transmission calibration method suitable for line protection device |
| CN110609190A (en) * | 2019-11-12 | 2019-12-24 | 国网宁夏电力有限公司石嘴山供电公司 | Relay protection device outlet checking instrument and method thereof |
| CN110824352A (en) * | 2019-11-28 | 2020-02-21 | 国网四川省电力公司攀枝花供电公司 | Relay protection logic checking device |
| CN110865261A (en) * | 2019-11-29 | 2020-03-06 | 国网四川省电力公司眉山供电公司 | Protection device outlet matrix calibrator and calibration method |
| CN112444742A (en) * | 2020-11-09 | 2021-03-05 | 国网山东省电力公司信息通信公司 | Relay protection channel monitoring and early warning system |
| CN112444742B (en) * | 2020-11-09 | 2022-05-06 | 国网山东省电力公司信息通信公司 | Relay protection channel monitoring and early warning system |
| CN115549305A (en) * | 2022-10-27 | 2022-12-30 | 东方电子股份有限公司 | Pressing plate state detection system |
| CN115549305B (en) * | 2022-10-27 | 2023-06-20 | 东方电子股份有限公司 | Pressing plate state detection system |
| CN116774629A (en) * | 2023-06-16 | 2023-09-19 | 国网江苏省电力有限公司泰州供电分公司 | Intelligent monitoring module and method for relay protection outlet loop number |
| CN116774629B (en) * | 2023-06-16 | 2024-01-23 | 国网江苏省电力有限公司泰州供电分公司 | Intelligent monitoring module and method for relay protection outlet loop number |
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