CN104267333A - Detector for checking main transformer tripping protection logic loop - Google Patents
Detector for checking main transformer tripping protection logic loop Download PDFInfo
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- CN104267333A CN104267333A CN201410564403.9A CN201410564403A CN104267333A CN 104267333 A CN104267333 A CN 104267333A CN 201410564403 A CN201410564403 A CN 201410564403A CN 104267333 A CN104267333 A CN 104267333A
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Abstract
The invention discloses a detector for checking a main transformer tripping protection logic loop. The detector is characterized by comprising a power module and at least one detection module; the detection modules are connected with detected tripping protection nodes through outgoing lines; the detection modules are divided into channel detection units and channel monitoring units; the channel detection units comprise holding relays and first resistors; when the detected tripping protection nodes are closed, normally-open nodes of the holding relays are closed, and channel detection unit loops where the holding relays are located are kept closed; the channel monitoring units comprise light-emitting diodes, second resistors and third resistors; when the channel detection unit loops are kept closed, the light-emitting diodes emit light.
Description
Technical field
The present invention relates to power system transformer relay protection field, particularly relating to a kind of for checking the pick-up unit in main transformer protection Trip Logic loop.
Background technology
Relay protection professional is when transformer station carries out main transformer protection examination or annual test, need check main-transformer trip under tens kinds of malfunctions outlet logic and tripping operation outlet secondary circuit correctness, but the Trip Logic of main transformer protection can up to more than 30, tripping operation outlet secondary circuit is also close to 15, if measure an outlet when often simulating a kind of fault trip, so to complete this inspection work and at least must carry out more than 300 fault simulation experiment, 2 people are at least needed to work more than 8 hours, but also to the human factors such as measuring error be considered.
At present for detecting the technology of tranformer protection Trip Logic, such as, there is the main transformer protection Tripping matrix tester of specialty, be made up of accurate chip, and chip is programmed and digital-scroll technique, can the trip time be measured.But this instrument cost is high; only have 10 sense channels that trip; the detection of Trip Logic can only be carried out to protective device itself; the tripping operation secondary circuit comprising pressing plate and wiring etc. cannot be detected; and special instrument also need to give training professional after could use, study and use cost all higher.
Therefore, how can high efficient and reliable and simply main transformer protection Trip Logic loop being detected in production work, be focus and the difficult problem of this area.
Summary of the invention
Fundamental purpose of the present invention is to provide that a kind of proving time is short for checking the pick-up unit in main transformer protection Trip Logic loop, instrument Cleaning Principle and operation all fairly simple, be applicable to extensively promoting.
Secondary technical matters to be solved by this invention is to provide a kind of for checking the pick-up unit in main transformer protection Trip Logic loop; the quantity of detection module is set according to the quantity of tested trip protection node, can increases detection module according to different actual conditions or reduce.The detection of the trip protection logical circuit of various main-transformer can be applied to.
In order to solve above-mentioned technical matters, the invention provides a kind of for checking the pick-up unit in main transformer protection Trip Logic loop, it includes power module and at least one detection module; Described detection module is connected with tested trip protection node by extension line; Described detection module is divided into Air conduct measurement unit and path monitoring unit;
Described Air conduct measurement unit comprises guard relay and the first resistance; When described tested trip protection node closes, the node of often opening of described guard relay closes, and makes the Air conduct measurement element loop at described guard relay place keep path;
Described path monitoring unit comprises light emitting diode, the second resistance and the 3rd resistance; When described Air conduct measurement element loop keeps path, described lumination of light emitting diode.
In a preferred embodiment: described power module uses at least two battery cases in parallel to power, and has two batteries be connected in series in each described battery case.
In a preferred embodiment: described extension line comprises the contact pin male and solderable connection-peg that are connected to wire two ends.
In a preferred embodiment: also comprise the contact pin female corresponding with described contact pin male.
In a preferred embodiment: each described detection module can independently exist, the quantity of described detection module is set according to the quantity of tested trip protection node, and adjusts the quantity of battery in described power module.
In a preferred embodiment: the number of described solderable connection-peg is consistent with the number of described detection module.
In a preferred embodiment: also comprise reset switch.
Compared to prior art, technical scheme of the present invention possesses following beneficial effect:
1. provided by the invention a kind of for checking the pick-up unit in main transformer protection Trip Logic loop; carry out tripping operation by guard relay to tested trip protection node to detect; when tested trip protection node closes; the node of often opening of described guard relay closes, and makes the light emitting diode electrified light emitting in monitoring module simultaneously.By the setting of simple electronic component, the detection in main transformer protection Trip Logic loop just can be completed, simple.
2. detection module can increase and decrease according to the number of tested trip protection node, adjusts the quantity of battery in power module simultaneously, so just can realize the object can powered smoothly to the detection module of different number.Therefore technical scheme of the present invention can the detection case in adaptive various main transformer protection Trip Logic loop, possesses broad applicability.
3. the present invention adopts visualized operation, and staff only need observe light emitting diode, and whether luminescence just can judge, very simply.
Accompanying drawing explanation
Fig. 1 is for checking the schematic top plan view of the pick-up unit in main transformer protection Trip Logic loop in the preferred embodiment of the present invention;
Fig. 2 is the circuit principle structure schematic diagram that invention is preferably implemented.
Embodiment
Hereafter the present invention will be further described with specific embodiment by reference to the accompanying drawings.
With reference to Fig. 1-2, a kind ofly comprise power module 101 for checking the pick-up unit in main transformer protection Trip Logic loop, switch 102, reset switch 103,15 detection modules 201,3 10 cushion pin females 301,3 extension lines 401.Wherein in detection module 201, guard relay 202 and the first resistance 203 form Air conduct measurement unit 204; Light emitting diode 205 and the second resistance 206, the 3rd resistance 207 form path monitoring unit.Described extension line 401 contains the solderable connection-peg 404 of 10 cushion pin males 402, wire 403 and 10 branch.
In the present embodiment, the supply voltage of power module 101 is 3V, and the serial battery of two joint 1.5V can be used to be positioned in battery case.In order to the situation of large power demands can be applicable to, in power module 101, placed the battery case of 3 series connection, so just place 6 batteries at most, reach the object of electric capacity dilatation.Need the quantity of the detection module 201 used to use the battery of respective numbers according to scene.
Guard relay 202 in Air conduct measurement unit 204 shown in Fig. 1 adopts rated voltage 1.5V, coil resistance 10 Europe, rated current to be the guard relay of 0.15A; possess a pair and often open node; the parameter of described guard relay 202 is consistent with the relay that main transformer protection trips in plug-in unit, can the action of corresponding tripping operation node better.Described guard relay 202 is connected with the first resistance 203 in Air conduct measurement unit 204, and the resistance of described first resistance is 12 Europe, controls the operating power of described guard relay.When be connected to outside extension line 401 respond tested trip protection node close time; described guard relay 202 invocation point; it is often opened node and closes instantaneously, and make the loop of described Air conduct measurement unit keep path, the fast quick-recovery of outside tripping operation node disconnects also unaffected in time.
The rated voltage of the light emitting diode 205 in the path monitoring unit 208 shown in Fig. 1 is 2.5V, carries out dividing potential drop by the second resistance 206 and the 3rd resistance 207, thus limits operating voltage and the power of light emitting diode 205, ensures its normal luminous.
The every bar of extension line described in Fig. 1 comprises 5 sense channels; every bar extension line is corresponding with 5 described detection modules 201; so just can detect 15 tested trip protection nodes simultaneously; if run into the situation of needs more than 15 detection modules 201, also more detection module 201 and corresponding extension line 401 can be set by expansion.In general; for the main-transformer of 220kV and above; its relay protective scheme Trip Logic outlet loop is between 10-15; and the trip protection logic export loop of the main transformer pressure of below 110kV is no more than 10; therefore extension line 401 to be designed to plug type; just can disconnect according to the situation at scene, remove unnecessary wiring, be convenient for carrying.
When carrying out Site Detection; first judge that tested main transformer protection has the secondary circuit that how much trips; thus adjust the quantity of battery in power module 101; take out enough extension lines 401; 10 cushion pin males 402 of described extension line 401 are connected with 10 cushion pin females 301, solderable connection-peg 404 are inserted the tripping operation secondary circuit node of described main-transformer.
Such as, suppose that following table is that main transformer protection fault type and the corresponding outlet definite value that need trip illustrate abridged table:
| ? | Outlet 1 | Outlet 2 | Outlet 3 | Outlet 4 | Outlet 5 | Outlet 6 | Outlet 7 | Outlet 8 | Outlet 9 |
| Trip Logic 1 | √ | X | X | √ | X | X | √ | X | X |
| Trip Logic 2 | X | √ | X | √ | X | X | X | X | X |
If traditionally verified, do Trip Logic 1 when verifying, professional A operating instrument is needed to simulate Trip Logic, the hand-held multimeter of professional B is overlapped on protection screen terminal block test outlet 1 node place, professional C carries out record, after simulating 1 Trip Logic, obtain the result of outlet 1; Then, multimeter is ridden over outlet 2 node place by B, A simulates Trip Logic again, obtain the result of outlet 2 ... the check-proof total in two Trip Logic loops needs A to carry out 18 simulation Trip Logic, B carries out 18 outlet nodes and measures supervision, C carries out the outcome record of 18 times, finally checks according to record and fixed value list.If whole flow process experimental result is normal, the activity duration, at about 15 minutes, needs 3 people to coordinate.
And when utilizing the present invention to detect, only need professional A in design drawing, first to find out this 9 couple outlet node in the position of terminal block, by solderable connection-peg 404 terminal of extension line 401.Then; still A operating instrument is only needed to simulate Trip Logic; can be found out by form; when simulating Trip Logic 1; the correct operation of main transformer protection Trip Logic should be outlet 1,4,7 action; at this moment, the path monitoring unit 208 in the detection module 1,4,7 in described pick-up unit also correspondence sends ruddiness.At this moment, because the luminescence of path monitoring unit 208 is long-term maintenances, A is only needed to check, luminous result and fixed value list without the need to record.If its result and form are not inconsistent, so just can judge this Trip Logic mistake or trip(ping) circuit mistake, A can carry out location of mistake rapidly; If result is checked normally, only need press reset switch 103, professional A just can carry out rapidly the simulated experiment of Trip Logic 2, and experimentation is fast simple, and only taking time when experimental result is normal is 2 minutes, and 1 people just can realize.
In sum, present invention employs simple circuit design, efficiently complete the inspection work that main transformer protection Trip Logic loop is complicated and loaded down with trivial details; substantially reduce proving time, improve quality inspection, design ingenious; easy to implement, possess good promotion prospect.
Claims (7)
1., for checking the pick-up unit in main transformer protection Trip Logic loop, it is characterized in that including power module and at least one detection module; Described detection module is connected with tested trip protection node by extension line; Described detection module is divided into Air conduct measurement unit and path monitoring unit;
Described Air conduct measurement unit comprises guard relay and the first resistance; When described tested trip protection node closes, the node of often opening of described guard relay closes, and makes the Air conduct measurement element loop at described guard relay place keep path;
Described path monitoring unit comprises light emitting diode, the second resistance and the 3rd resistance; When described Air conduct measurement element loop keeps path, described lumination of light emitting diode.
2. according to claim 1 a kind of for checking the pick-up unit in main transformer protection Trip Logic loop, it is characterized in that: described power module uses at least two battery cases in parallel to power, and has two batteries be connected in series in each described battery case.
3. according to claim 1 a kind of for checking the pick-up unit in main transformer protection Trip Logic loop, it is characterized in that: described extension line comprises the contact pin male and solderable connection-peg that are connected to wire two ends.
4. according to claim 3 a kind of for checking the pick-up unit in main transformer protection Trip Logic loop, it is characterized in that: also comprise the contact pin female corresponding with described contact pin male.
5. according to claim 2 a kind of for checking the pick-up unit in main transformer protection Trip Logic loop; it is characterized in that: each described detection module can independently exist; the quantity of described detection module is set according to the quantity of tested trip protection node, and adjusts the quantity of battery in described power module.
6. according to claim 3 a kind of for checking the pick-up unit in main transformer protection Trip Logic loop, it is characterized in that: the number of described solderable connection-peg is consistent with the number of described detection module.
7. according to claim 1 a kind of for checking the pick-up unit in main transformer protection Trip Logic loop, it is characterized in that: also comprise reset switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410564403.9A CN104267333A (en) | 2014-10-21 | 2014-10-21 | Detector for checking main transformer tripping protection logic loop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410564403.9A CN104267333A (en) | 2014-10-21 | 2014-10-21 | Detector for checking main transformer tripping protection logic loop |
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| CN104267333A true CN104267333A (en) | 2015-01-07 |
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| CN201410564403.9A Pending CN104267333A (en) | 2014-10-21 | 2014-10-21 | Detector for checking main transformer tripping protection logic loop |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116169652A (en) * | 2023-03-07 | 2023-05-26 | 国网江苏省电力有限公司镇江供电分公司 | 220kV main transformer switch tripping monitoring and distinguishing method |
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Application publication date: 20150107 |