CN103792451B - A kind of relay protection protection exit loop detection circuit and instrument - Google Patents
A kind of relay protection protection exit loop detection circuit and instrument Download PDFInfo
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- CN103792451B CN103792451B CN201410043463.6A CN201410043463A CN103792451B CN 103792451 B CN103792451 B CN 103792451B CN 201410043463 A CN201410043463 A CN 201410043463A CN 103792451 B CN103792451 B CN 103792451B
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- exit loop
- latch
- detection circuit
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Abstract
The invention discloses a kind of relay protection protection exit loop detection circuit and instrument; after forming a branch road after the normally opened contact series connection of the coil of latch-in relay, display lamp and latch-in relay, the positive and negative electrode of power supply is accessed at two ends; the two ends of the normally opened contact of latch-in relay connect the switching node in relay protection protection exit loop, in parallel with the switching node in relay protection protection exit loop.This testing circuit also includes the time relay, and the signal end that starts of the time relay connects the digital quantity signal that signal generator simulated failure amount starts to export, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.As long as the luminance of this testing circuit viewing lamp just can determine whether whether action is correct in protection exit loop, and can automatically detect movement time, simple and convenient.
Description
Technical field
The present invention relates to a kind of relay protection protection exit loop detection circuit and instrument.
Background technology
Development and the safe and stable operation of power system bring huge power and benefit to national economy and social development.But domestic and foreign experience shows, once there is nature or man-made fault in large-scale power system, it is impossible to timely and effective control, will lose stable operation, make electric network from collapsing, will lead to large-area power-cuts, to the consequence of bringing on a disaster property of society.Therefore, since power system occurs, how to ensure its safe and stable operation, just become an eternal theme.All work about electric power persons are taking technology, the various measures of management by every possible means, make every effort to avoid grid stability to be destroyed and disintegrate, prevent large area blackout.Wherein, relay protection (including automatic safety device) is exactly to ensure power equipment safety and prevent and limit the technological means basic, most important, maximally effective of the long-time large-area power-cuts of power system.The most how to be effectively improved relay protection person works's efficiency and reduce the protective relaying maloperation work that human error causes, ensureing power network safety operation, become a big technical barrier.
Therefore; often overlapping before relay protection formally puts into operation; protective relaying device need to be checked comprehensively; including defencive function logic, current-voltage sampling loop, protection exit loop, the test in input and output loop; and after the correctness in protection exit loop will directly affect relay protection action, fault can be excised the most reliably and play vital effect.The method of traditional test to protection exit loop; it is from signal generator, to be sent the digital quantity signal of simulated failure amount to relay protection input by technical staff; whether the conducting in protection exit loop is manually detected again with circuit tester; judge that protection exit circuit behavior is the most correct by the conduction value observing the conducting shelves of circuit tester; workload is the hugest and loaded down with trivial details, as easy as rolling off a log causes artificial mistake.It addition, lack the special instrument to protection exit circuit behavior time detecting, it is difficult to judge whether the movement time in protection exit loop meets associated specifications.
Summary of the invention
It is an object of the invention to provide a kind of relay protection protection exit loop detection circuit and instrument, with the quick and easy detection realizing relay protection protection exit loop.
A kind of relay protection protection exit loop detection circuit of the present invention; after forming a branch road after the normally opened contact series connection of the coil of latch-in relay, display lamp and latch-in relay, the positive and negative electrode of power supply is accessed at two ends; the two ends of the normally opened contact of latch-in relay connect the switching node in relay protection protection exit loop, in parallel with the switching node in relay protection protection exit loop；When relay protection protection exit circuit switching node closes, testing circuit Guan Bi energising, the coil of latch-in relay obtain electric after by normally opened contact adhesive.
nullA kind of relay protection protection exit loop detection circuit of the present invention，When relay protection protection exit circuit switching node closes，Because the normally opened contact of latch-in relay is in parallel with relay protection protection exit loop，So the normally opened contact two ends of latch-in relay are equivalent to short circuit，Testing circuit Guan Bi energising，The coil electricity of display lamp luminescence latch-in relay simultaneously，Galvanomagnetic-effect is produced after the coil electricity of latch-in relay，The normally opened contact Guan Bi of latch-in relay，Even if relay protection protection exit loop disconnected every a period of time，Relay protection protection exit loop detection circuit is under the effect of latch-in relay，Normally opened contact still closes，Relay protection protection exit loop detection circuit is still within closing "on" position，Display lamp is the most luminous，As long as whether luminescence just may know that whether action is correct in relay protection protection exit loop to technical staff's viewing lamp，Simple and convenient，Change and needed by the way of circuit tester manual test in the past，It is greatly improved work efficiency.
Preferably; this relay protection protection exit loop detection circuit also includes the time relay; the signal end that starts of the time relay connects the digital quantity signal that signal generator simulated failure amount starts to export, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.
By increasing the time relay, the signal end that starts of the time relay is connected to the digital quantity signal that signal generator simulated failure amount starts to export, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.When signal generator sends the digital quantity signal of simulated failure amount, the starting signal end of the time relay can synchronize to receive digital quantity signal, and the time relay starts to start timing；When the normally opened contact Guan Bi of latch-in relay in relay protection protection exit loop detection circuit; i.e. relay protection protection exit loop action; the reset terminal of the time relay receives the signal of telecommunication sended over by relay protection protection exit loop detection circuit; the time relay stops timing, can draw the movement time in relay protection protection exit loop.
Preferably, normally closed switch also it is in series with between display lamp and relay protection protection exit loop.By being in series with normally closed switch between display lamp and the normally opened contact of latch-in relay; when relay protection protection exit loop detection circuit Guan Bi "on" position; display lamp is luminous; technical staff has observed display lamp luminescence situation; after judging that protection exit loop is the most correct; normally closed switch can be disconnected by pressing; relay protection protection exit loop detection circuit is i.e. off; coil no power; normally opened contact recovers off-state; realize resetting, thus technical staff can carry out next group test.By arranging normally closed switch in relay protection protection exit loop detection circuit, technical staff can quickly carry out organizing test more, improves testing efficiency.
A kind of relay protection protection exit loop of the present invention detecting instrument; including the AC/DC power module of alternating current power supply leading-in end and AC-DC conversion, the outfan of AC/DC power module more than one above-mentioned relay protection protection exit loop detection circuit in parallel.
Above-mentioned relay protection protection exit loop detecting instrument; during use; the two ends of the normally opened contact of the latch-in relay of each relay protection protection exit loop detection circuit are connected respectively the switching node in each relay protection protection exit loop, in parallel with the switching node in relay protection protection exit loop, each road.When a certain relay protection protection exit circuit closed; display lamp corresponding on detecting instrument can be luminous; and keeping luminescence by latch-in relay, technical staff observes display lamp situation on detecting instrument and just can predict relay protection protection exit loop intuitively whether action is correct.Described instrument can achieve the detection of each outlet loop of relay protection very convenient, intuitively.
Accompanying drawing explanation
Fig. 1 is invention relay protection device protection exit loop detection circuit figure.
Fig. 2 is the invention relay protection device protection exit loop detection circuit structure chart with normally closed switch.
Fig. 3 is time relay circuit structure chart of the present invention.
Fig. 4 is invention relay protection device protection exit loop detecting instrument structural representation.
Detailed description of the invention
Such as Fig. 1; a kind of relay protection protection exit loop detection circuit; after forming a branch road after normally opened contact 5 series connection of the coil 2 of its latch-in relay, display lamp 3 and latch-in relay, the positive and negative electrode of power supply 1 is accessed at two ends; the two ends of the normally opened contact 5 of latch-in relay connect the switching node 7 in relay protection protection exit loop, in parallel with the switching node in relay protection protection exit loop.
When relay protection sends control signals to protection exit loop; display lamp can whether action be correct by the switching node in whether luminous indicating relay protection device protection exit loop, thus realizes the detection to relay protection protection exit loop.Its detection process is simple, directly perceived.
Relay protection protection exit loop detection circuit may also include the time relay 6; as shown in Figure 2,3; the signal end that starts of the time relay 6 connects the digital quantity signal that signal generator simulated failure amount starts to export, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.By arranging the time relay, it is possible to record simulated failure signal is sent to the time difference between switching node action, thus achieves the detection of the movement time in relay protection protection exit loop easily.
It addition, as in figure 2 it is shown, be also in series with normally closed switch 4 between display lamp and the normally opened contact of latch-in relay.After detection, by disconnecting normally closed switch, the reset of testing circuit can be realized.Normally closed switch is preferred with button, easy to operate.
As shown in Figure 4; a kind of relay protection protection exit loop detecting instrument; AC/DC power module including alternating current power supply leading-in end and AC-DC conversion; alternating current 220V voltage is changed into the unidirectional current that voltage is 12V by AC/DC power module, the outfan of AC/DC power module more than one relay protection protection exit loop detection circuit in parallel.Relay protection protection exit loop detection circuit in detecting instrument can be configured according to the quantity in relay protection protection exit loop, in order to can realize the detection in all outlet ports loop after a detecting instrument once mounting.
Claims (4)
1. a relay protection protection exit loop detection circuit; it is characterized in that: after forming a branch road after the normally opened contact series connection of the coil of latch-in relay, display lamp and latch-in relay, the positive and negative electrode of power supply is accessed at two ends; the two ends of the normally opened contact of latch-in relay connect the switching node in relay protection protection exit loop, in parallel with the switching node in relay protection protection exit loop；When relay protection protection exit circuit switching node closes, testing circuit Guan Bi energising, the coil of latch-in relay obtain electric after by normally opened contact adhesive.
A kind of relay protection protection exit loop detection circuit the most according to claim 1; it is characterized in that: relay protection protection exit loop detection circuit also includes the time relay; the signal end that starts of the time relay connects the digital quantity signal that signal generator simulated failure amount starts to export, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.
A kind of relay protection protection exit loop detection circuit the most according to claim 1 and 2, it is characterised in that: also it is in series with normally closed switch between display lamp and relay protection protection exit loop.
4. a relay protection protection exit loop detecting instrument; it is characterized in that: this instrument includes the AC/DC power module of alternating current power supply leading-in end and AC-DC conversion, the arbitrary described relay protection protection exit loop detection circuit of the outfan of AC/DC power module more than one claim 1-3 in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043463.6A CN103792451B (en) | 2014-01-29 | 2014-01-29 | A kind of relay protection protection exit loop detection circuit and instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410043463.6A CN103792451B (en) | 2014-01-29 | 2014-01-29 | A kind of relay protection protection exit loop detection circuit and instrument |
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| CN103792451A CN103792451A (en) | 2014-05-14 |
| CN103792451B true CN103792451B (en) | 2016-09-28 |
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| CN201410043463.6A Expired - Fee Related CN103792451B (en) | 2014-01-29 | 2014-01-29 | A kind of relay protection protection exit loop detection circuit and instrument |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652199A (en) * | 2016-04-20 | 2016-06-08 | 国家电网公司 | Detection device of transformer substation relay protection outlet |
| CN106338951A (en) * | 2016-10-26 | 2017-01-18 | 国网浙江永嘉县供电公司 | Control circuit of online oil filtering machine of SYJZZ type on-load switch |
| CN108680819A (en) * | 2018-05-24 | 2018-10-19 | 国网河南省电力公司检修公司 | A kind of change of current becomes protection exit circuit and matrix test method |
| CN109298333A (en) * | 2018-11-28 | 2019-02-01 | 广东电网有限责任公司 | Protective relaying device detection method and device |
| CN110632447B (en) * | 2019-09-05 | 2022-04-15 | 深圳供电局有限公司 | On-site calibration method and system for power grid relay protection tripping outlet loop |
| CN112731125A (en) * | 2020-12-03 | 2021-04-30 | 广东电网有限责任公司 | System and method for detecting action exit time of protection device |
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| CN203376409U (en) * | 2013-06-06 | 2014-01-01 | 国家电网公司 | Main transformer protection tripping matrix outlet auxiliary tester |
| CN203811702U (en) * | 2014-01-29 | 2014-09-03 | 中国能源建设集团广东火电工程总公司 | Circuit and instrument for testing outlet protection loop of relay protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10229631A (en) * | 1997-02-17 | 1998-08-25 | Hitachi Ltd | Analog monitoring circuit of digital relay device |
| JP2007206749A (en) * | 2006-01-30 | 2007-08-16 | Chugoku Electric Power Co Inc:The | Signal monitor circuit and signal monitor device |
| CN201311471Y (en) * | 2008-12-12 | 2009-09-16 | 宁夏电力公司吴忠供电局 | Supplementary power automatic input equipment test switch simulator |
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| CN103792451A (en) | 2014-05-14 |
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