CN104483581B - Detection instantaneous ac scurries into the warning device and method of straight-flow system - Google Patents
Detection instantaneous ac scurries into the warning device and method of straight-flow system Download PDFInfo
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- CN104483581B CN104483581B CN201410834456.8A CN201410834456A CN104483581B CN 104483581 B CN104483581 B CN 104483581B CN 201410834456 A CN201410834456 A CN 201410834456A CN 104483581 B CN104483581 B CN 104483581B
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Abstract
Warning device and method that instantaneous ac scurries into straight-flow system are detected the present invention relates to a kind of, straight-flow system positive pole series connection capacitance one, the two-way optocoupler of current-limiting resistance one and first are followed by ground, current-limiting resistance one connects 1 pin of the first two-way optocoupler, the 2 pin ground connection of first two-way optocoupler, the coil of 3 pin contact relays one of the first two-way optocoupler, the switch of relay one connection warning device one and power supply, the 4 pin connection power supply of the first two-way optocoupler；Straight-flow system negative pole series connection capacitance two, the two-way optocoupler of current-limiting resistance two and second are followed by ground, current-limiting resistance two connects 2 pin of the second two-way optocoupler, the 1 pin ground connection of second two-way optocoupler, the coil of 3 pin contact relays two of the second two-way optocoupler, the switch of relay two connection warning device two and power supply, the 4 pin connection power supply of the second two-way optocoupler.The present invention is simple in construction, straight-flow system can be monitored in real time whether occurs instantaneous ac and scurry into failure, and can be alarmed in time, reminds staff to carry out troubleshooting.
Description
Technical field
It is more particularly to a kind of to detect the warning device that instantaneous ac scurries into straight-flow system the present invention relates to a kind of warning device
And method.
Background technology
The safe and reliable operation of dc source is most important for the safe and reliable operation of transformer station.But due to dc source
Power supply unit is more, and power cable is long, often occurs the failures such as DC earthing in actual motion.Although straight-flow system is transported floatingly
OK, single-point grounding does not influence the normal operation of system, but must search failure as early as possible and eliminated, and otherwise occurs second point ground connection
When, relay or protection device misoperation are will result in, is led to grave consequences.
At present, straight-flow system insulation and line selection apparatus are commonly used in transformer station, although serve preferable effect, but
It is that in actual motion, it is that exchange instantaneously scurries into DC Line Fault to have a kind of special earth fault, is handed over when generation is once instantaneous
Flee it is fashionable tripping probably will be switched within a few tens of milliseconds, lead to significant blackouts accident.Although Partial DC system
Insulation and line selection apparatus possess exchange and scurry into direct current warning function, but can only judge the long period (being at least second level) or
Failure is scurried into slow enhanced exchange, and failure is scurried into instantaneous ac can not realize monitoring, and so scurrying into failure to exchange is present
Check frequency.
The content of the invention
According to deficiency of the prior art above, the problem to be solved in the present invention is：There is provided a kind of simple in construction, use spirit
Living convenient, security reliability is high, straight-flow system can be monitored in real time whether occurs instantaneous ac and scurry into failure, and can enter in time
Row alarm, it is to avoid the detection instantaneous ac that power outage occurs scurries into the warning device and method of straight-flow system.
The technical solution adopted for the present invention to solve the technical problems is：
Described detection instantaneous ac scurries into the warning device of straight-flow system, including capacitance one, current-limiting resistance one,
One two-way optocoupler, relay one, warning device one, capacitance two, current-limiting resistance two, the second two-way optocoupler, relay two, report
Alarm device two；
Straight-flow system positive pole is sequentially connected in series capacitance one, the two-way optocoupler of current-limiting resistance one and first and is followed by ground, current limliting electricity
Resistance one connects 1 pin of the first two-way optocoupler, and 2 pin of the first two-way optocoupler are grounded, 3 pin contact relays one of the first two-way optocoupler
Coil, the switch of relay one connection warning device one and power supply, the 4 pin connection power supply of the first two-way optocoupler；
Straight-flow system negative pole is sequentially connected in series capacitance two, the two-way optocoupler of current-limiting resistance two and second and is followed by ground, current limliting electricity
Resistance two connects 2 pin of the second two-way optocoupler, and 1 pin of the second two-way optocoupler is grounded, 3 pin contact relays two of the second two-way optocoupler
Coil, the switch of relay two connection warning device two and power supply, the 4 pin connection power supply of the second two-way optocoupler.
The warning device that described detection instantaneous ac scurries into straight-flow system can monitor whether straight-flow system occurs in real time
Instantaneous ac scurries into failure, the foundation of failure judgement generation is provided for field personnel, it is ensured that staff is fast and effectively
Carry out failture evacuation, it is to avoid the generation of power outage, simple in construction, security reliability is high.
Further preferably, warning device one and warning device two use LED or emergency alarm bell.It is easy to connect, materials side
Just, cost is low.
Further preferably, warning device one and warning device two use LED and emergency alarm bell, and LED and emergency alarm bell are simultaneously
Connection is set.When breaking down for one, another can do standby, improve security reliability.
The method that described detection instantaneous ac scurries into straight-flow system：By having detected whether instantaneous ac electricity by blocking
Electric capacity one, current-limiting resistance one, the first two-way optocoupler, capacitance two, the two-way optocoupler of current-limiting resistance two and second, if there is instantaneous friendship
Stream electricity passes through, then the triode conducting of the first two-way optocoupler or the second two-way optocoupler, and control relay one or relay two are acted,
Warning device one or warning device two is controlled to be alarmed by relay one or relay two, if logical without instantaneous ac electricity
Cross, then the triode of the first two-way optocoupler and the second two-way optocoupler is not turned on, relay one and relay two are failure to actuate, alarm dress
Put one and warning device two without alarm.It is described in detail below：
If 1) scurry into straight-flow system without instantaneous ac, the blocking electricity being connected with straight-flow system positive pole and straight-flow system negative pole
Direct current can be electrically isolated by appearance one and capacitance two, and current-limiting resistance one, current-limiting resistance two, the first two-way optocoupler and second are two-way
The no electric current of optocoupler passes through, and the coil no power of relay one and relay two, relay one and relay two are switched and located
In off-state, warning device one and warning device two are not alarmed；
If 2) straight-flow system positive pole has instantaneous ac to scurry into straight-flow system, capacitance one is exchanged with current-limiting resistance one
Electricity passes through, and alternating current acts on the input of the first two-way optocoupler, the output end triode ON of the first two-way optocoupler, relay
One coil electricity, the make and break contact closure of relay one, warning device one is alarmed, is connected with straight-flow system negative pole
Capacitance two, the no electric current of the two-way optocoupler of current-limiting resistance two and second pass through, the coil no power of relay two, relay
Two switches are off, and warning device two is not alarmed；
If 3) straight-flow system negative pole has instantaneous ac to scurry into straight-flow system, capacitance two is exchanged with current-limiting resistance two
Electricity passes through, and alternating current acts on the input of the second two-way optocoupler, the output end triode ON of the second two-way optocoupler, relay
Two coil electricity, the make and break contact closure of relay two, warning device two is alarmed, is connected with straight-flow system positive pole
Capacitance one, the two-way optocoupler of current-limiting resistance one and first are without coil no power of the electric current by relay one, relay
One switch is off, and warning device one is not alarmed；
If 4) straight-flow system positive pole and straight-flow system negative pole have instantaneous ac to scurry into straight-flow system, capacitance one,
Current-limiting resistance one, capacitance two and current-limiting resistance two have alternating current to pass through simultaneously, alternating current act on the first two-way optocoupler and
The output end triode ON of the input of second two-way optocoupler, the first two-way optocoupler and the second two-way optocoupler, the He of relay one
The make and break contact closure of the coil electricity of relay two, relay one and relay two, warning device one and warning device two are same
Shi Jinhang alarms.
The present invention is had an advantageous effect in that：
The warning device and method that described detection instantaneous ac scurries into straight-flow system are simple in construction, flexible and convenient to use,
The fault detect blind area present in current monitoring alarm can be overcome, can monitor whether straight-flow system occurs instantaneously in real time
Failure is scurried into exchange, and can be alarmed in time, and the foundation of failure judgement generation is provided for field personnel, it is ensured that work
Personnel fast and effectively carry out failture evacuation, it is to avoid the generation of power outage, improve the reliability of power supply.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of the embodiment of the present invention 1；
Fig. 3 is the structural representation of the embodiment of the present invention 2；
In figure, R1, current-limiting resistance one；R2, current-limiting resistance two；C1, capacitance one；C2, capacitance two；U1, first
Two-way optocoupler；U2, the second two-way optocoupler；T1, relay one；T2, relay two；L1, warning device one；L2, warning device two.
Embodiment
Embodiments of the invention are described further below in conjunction with the accompanying drawings：
Embodiment 1：
As Figure 1-Figure 2, detection instantaneous ac of the present invention scurries into the warning device of straight-flow system, including blocking
The C1 of electric capacity one, the R1 of current-limiting resistance one, the first two-way optocoupler U1, the T1 of relay one, the L1 of warning device one, the C2 of capacitance two, limit
The R2 of leakage resistance two, the second two-way optocoupler U2, the T2 of relay two, the L2 of warning device two；
Straight-flow system positive pole is sequentially connected in series after the two-way optocoupler U1 of the C1 of capacitance one, the R1 of current-limiting resistance one and first and is grounded,
The the first two-way optocoupler U1 of R1 connections of current-limiting resistance one 1 pin, the first two-way optocoupler U1 2 pin ground connection, the 3 of the first two-way optocoupler U1
The T1 of pin contact relay one coil, the T1 of the relay one switches connection L1 of warning device one and power supply, the first two-way optocoupler U1 4 pin
Connect power supply；
Straight-flow system negative pole is sequentially connected in series after the two-way optocoupler U2 of the C2 of capacitance two, the R2 of current-limiting resistance two and second and is grounded,
The the second two-way optocoupler U2 of R2 connections of current-limiting resistance two 2 pin, the second two-way optocoupler U2 1 pin ground connection, the 3 of the second two-way optocoupler U2
The T2 of pin contact relay two coil, the T2 of the relay two switches connection L2 of warning device two and power supply, the second two-way optocoupler U2 4 pin
Connect power supply.
As shown in Fig. 2 the L1 of the warning device one and L2 of warning device two uses LED or emergency alarm bell.
Embodiment 2：
As shown in Figure 1, Figure 3, then on the basis of embodiment 1, LED two ends parallel connection emergency alarm bell；Or emergency alarm bell two ends are simultaneously
Join LED.
The method that detection instantaneous ac of the present invention scurries into straight-flow system：
By detected whether instantaneous ac electricity by the C1 of capacitance one, the R1 of current-limiting resistance one, the first two-way optocoupler U1,
The two-way optocoupler U2 of the C2 of capacitance two, the R2 of current-limiting resistance two and second, if there is instantaneous ac electricity to pass through, the first two-way optocoupler U1
Or second two-way optocoupler U2 triode conducting, the T1 of control relay one or the T2 of relay two actions, by the T1 of relay one or
The T2 of the relay two controls L1 of the warning device one or L2 of warning device two is alarmed, if no instantaneous ac electricity passes through, and first
The two-way two-way optocoupler U2 of optocoupler U1 and second triode is not turned on, and the T1 of relay one and the T2 of relay two are failure to actuate, alarm dress
A L1 and the L2 of warning device two are put without alarm.It is described in detail below：
If 1) scurry into straight-flow system without instantaneous ac, the blocking electricity being connected with straight-flow system positive pole and straight-flow system negative pole
Direct current can be electrically isolated by holding a C1 and the C2 of capacitance two, the R1 of current-limiting resistance one, the R2 of current-limiting resistance two, the first two-way optocoupler U1
Pass through with the second two-way no electric currents of optocoupler U2, the T1 of relay one and the T2 of relay two coil no power, the T1 of relay one
Off-state is in the T2 of relay two switches, the L1 of warning device one and the L2 of warning device two do not alarm；
If 2) straight-flow system positive pole has instantaneous ac to scurry into straight-flow system, the C1 of capacitance one and the R1 of current-limiting resistance one have
Alternating current passes through, and alternating current acts on the first two-way optocoupler U1 input, and the first two-way optocoupler U1 output end triode is led
It is logical, the T1 of relay one coil electricity, the T1 of relay one make and break contact closure, the L1 of warning device one is alarmed, with direct current
The no electric currents of the two-way optocoupler U2 of the C2 of capacitance two, the R2 of current-limiting resistance two and second that system negative pole is connected pass through, relay
The T2 of device two coil no power, the T2 of relay two switches are off, and the L2 of warning device two does not alarm；
If 3) straight-flow system negative pole has instantaneous ac to scurry into straight-flow system, the C2 of capacitance two and the R2 of current-limiting resistance two have
Alternating current passes through, and alternating current acts on the second two-way optocoupler U2 input, and the second two-way optocoupler U2 output end triode is led
It is logical, the T2 of relay two coil electricity, the T2 of relay two make and break contact closure, the L2 of warning device two is alarmed, with direct current
The two-way optocoupler U1 of the C1 of capacitance one, the R1 of current-limiting resistance one and first that system positive pole is connected passes through relay without electric current
One T1 coil no power, the T1 of relay one switches are off, and the L1 of warning device one does not alarm；
If 4) straight-flow system positive pole and straight-flow system negative pole have instantaneous ac to scurry into straight-flow system, capacitance one
C1, the R1 of current-limiting resistance one, the C2 of capacitance two and the R2 of current-limiting resistance two have alternating current to pass through simultaneously, and alternating current acts on first pair
To the two-way optocoupler U2 of optocoupler U1 and second input, the first two-way two-way optocoupler U2 of optocoupler U1 and second output end triode
Conducting, the T1 of relay one and the T2 of relay two coil electricity, the T1 of relay one and the T2 of relay two make and break contact closure, report
The L1 of the alarm device one and L2 of warning device two is alarmed simultaneously.
The present invention is simple in construction, flexible and convenient to use, and security reliability is high, can monitor whether straight-flow system occurs in real time
Instantaneous ac scurries into failure, and can be alarmed in time, improves the reliability of power supply, with stronger practicality.
Claims (5)
1. a kind of detect the warning device that instantaneous ac scurries into straight-flow system, it is characterised in that：Including capacitance one (C1), limit
Leakage resistance one (R1), the first two-way optocoupler (U1), relay one (T1), warning device one (L1), capacitance two (C2), current limliting
Resistance two (R2), the second two-way optocoupler (U2), relay two (T2), warning device two (L2)；
Straight-flow system positive pole is sequentially connected in series capacitance one (C1), current-limiting resistance one (R1) and the first two-way optocoupler (U1) and is followed by
Ground, current-limiting resistance one (R1) connects 1 pin of the first two-way optocoupler (U1), and 2 pin of the first two-way optocoupler (U1) are grounded, and first is two-way
The coil of 3 pin contact relays one (T1) of optocoupler (U1), relay one (T1) switch connection warning device one (L1) and power supply, the
The 4 pin connection power supply of one two-way optocoupler (U1)；
Straight-flow system negative pole is sequentially connected in series capacitance two (C2), current-limiting resistance two (R2) and the second two-way optocoupler (U2) and is followed by
Ground, current-limiting resistance two (R2) connects 2 pin of the second two-way optocoupler (U2), and 1 pin of the second two-way optocoupler (U2) is grounded, and second is two-way
The coil of 3 pin contact relays two (T2) of optocoupler (U2), relay two (T2) switch connection warning device two (L2) and power supply, the
The 4 pin connection power supply of two two-way optocouplers (U2).
2. detection instantaneous ac according to claim 1 scurries into the warning device of straight-flow system, it is characterised in that：Described
Warning device one (L1) and warning device two (L2) use LED or emergency alarm bell.
3. detection instantaneous ac according to claim 1 scurries into the warning device of straight-flow system, it is characterised in that：Described
Warning device one (L1) and warning device two (L2) use LED and emergency alarm bell, and LED and emergency alarm bell are arranged in parallel.
4. a kind of detect the method that instantaneous ac scurries into straight-flow system, it is characterised in that：By having detected whether instantaneous ac electricity
Pass through capacitance one (C1), current-limiting resistance one (R1), the first two-way optocoupler (U1), capacitance two (C2), current-limiting resistance two
(R2) and the second two-way optocoupler (U2), if there is instantaneous ac electricity to pass through, the first two-way optocoupler (U1) or the second two-way optocoupler
(U2) triode conducting, control relay one (T1) or relay two (T2) action, pass through relay one (T1) or relay
Two (T2) control warning devices one (L1) or warning device two (L2) are alarmed, if no instantaneous ac electricity passes through, and first
The triode of two-way optocoupler (U1) and the second two-way optocoupler (U2) is not turned on, and relay one (T1) and relay two (T2) are motionless
Make, warning device one (L1) and warning device two (L2) are without alarm.
5. the method that detection instantaneous ac according to claim 4 scurries into straight-flow system, it is characterised in that：
If 1) scurry into straight-flow system without instantaneous ac, the capacitance one being connected with straight-flow system positive pole and straight-flow system negative pole
(C1) direct current can be electrically isolated with capacitance two (C2), current-limiting resistance one (R1), current-limiting resistance two (R2), the first bi-directional light
Coupling (U1) and the second two-way no electric current of optocoupler (U2) pass through, and the coil of relay one (T1) and relay two (T2) is obstructed
Electricity, relay one (T1) and relay two (T2) switch are in off-state, warning device one (L1) and warning device two
(L2) do not alarm；
If 2) straight-flow system positive pole has instantaneous ac to scurry into straight-flow system, capacitance one (C1) and current-limiting resistance one (R1) have
Alternating current passes through, and alternating current acts on the input of the first two-way optocoupler (U1), the pole of output end three of the first two-way optocoupler (U1)
Pipe is turned on, the coil electricity of relay one (T1), and the make and break contact closure of relay one (T1), warning device one (L1) is reported
Alert, capacitance two (C2), current-limiting resistance two (R2) and the second two-way optocoupler (U2) being connected with straight-flow system negative pole do not have
There is electric current to pass through, the coil no power of relay two (T2), relay two (T2) switch is off, warning device two
(L2) do not alarm；
If 3) straight-flow system negative pole has instantaneous ac to scurry into straight-flow system, capacitance two (C2) and current-limiting resistance two (R2) have
Alternating current passes through, and alternating current acts on the input of the second two-way optocoupler (U2), the pole of output end three of the second two-way optocoupler (U2)
Pipe is turned on, the coil electricity of relay two (T2), and the make and break contact closure of relay two (T2), warning device two (L2) is reported
Alert, capacitance one (C1), current-limiting resistance one (R1) and the first two-way optocoupler (U1) being connected with straight-flow system positive pole do not have
There is coil no power of the electric current by relay one (T1), relay one (T1) switch is off, warning device one
(L1) do not alarm；
If 4) straight-flow system positive pole and straight-flow system negative pole have instantaneous ac to scurry into straight-flow system, capacitance one (C1),
Current-limiting resistance one (R1), capacitance two (C2) and current-limiting resistance two (R2) are while there is alternating current to pass through, and alternating current acts on
One two-way optocoupler (U1) and the input of the second two-way optocoupler (U2), the first two-way optocoupler (U1) and the second two-way optocoupler (U2)
The coil electricity of output end triode ON, relay one (T1) and relay two (T2), relay one (T1) and relay two
(T2) make and break contact closure, warning device one (L1) and warning device two (L2) are while alarmed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410834456.8A CN104483581B (en) | 2014-12-26 | 2014-12-26 | Detection instantaneous ac scurries into the warning device and method of straight-flow system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410834456.8A CN104483581B (en) | 2014-12-26 | 2014-12-26 | Detection instantaneous ac scurries into the warning device and method of straight-flow system |
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| CN104483581A CN104483581A (en) | 2015-04-01 |
| CN104483581B true CN104483581B (en) | 2017-10-27 |
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| CN114062959B (en) * | 2021-12-15 | 2023-08-08 | 广州格兴全电力科技有限公司 | AC-DC fault detection system and method in DC insulation system |
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| CN103427485A (en) * | 2013-09-09 | 2013-12-04 | 国家电网公司 | Device used for detecting direct current power supply connected to alternating current power supply and direct current power supply ripples and used in transformer substation |
| CN203396920U (en) * | 2013-07-23 | 2014-01-15 | 浙江海洋学院 | Handheld alternating-current and direct-current circuit connection error monitoring and alarming device |
| CN103743988A (en) * | 2013-12-18 | 2014-04-23 | 国家电网公司 | AC fleeing early warning monitoring device of transformer station DC power supply system |
| CN204008808U (en) * | 2014-07-15 | 2014-12-10 | 国家电网公司 | Alternating current is scurried into the detection of straight-flow system and is compeled to jump device |
| CN204374393U (en) * | 2014-12-26 | 2015-06-03 | 山东智洋电气股份有限公司 | Detect the warning device that instantaneous ac scurries into straight-flow system |
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- 2014-12-26 CN CN201410834456.8A patent/CN104483581B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203069713U (en) * | 2012-11-25 | 2013-07-17 | 山东电力集团公司济南供电公司 | Alternating-current-into-direct-current monitoring device |
| CN203396920U (en) * | 2013-07-23 | 2014-01-15 | 浙江海洋学院 | Handheld alternating-current and direct-current circuit connection error monitoring and alarming device |
| CN103427485A (en) * | 2013-09-09 | 2013-12-04 | 国家电网公司 | Device used for detecting direct current power supply connected to alternating current power supply and direct current power supply ripples and used in transformer substation |
| CN103743988A (en) * | 2013-12-18 | 2014-04-23 | 国家电网公司 | AC fleeing early warning monitoring device of transformer station DC power supply system |
| CN204008808U (en) * | 2014-07-15 | 2014-12-10 | 国家电网公司 | Alternating current is scurried into the detection of straight-flow system and is compeled to jump device |
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Inventor after: Liu Guoyong Inventor after: Ren Zhishuai Inventor after: Xu Xuelai Inventor after: Sun Weiqiang Inventor after: Meng Haifeng Inventor after: Li Yanbing Inventor after: Zhang Wanzheng Inventor after: Xu Ke Inventor before: Liu Guoyong Inventor before: Xu Xuelai Inventor before: Zhang Wanzheng Inventor before: Xu Ke |
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Effective date of registration: 20160920 Address after: 405 room 255086, block E, No. 135, Zibo Development Zone, Shandong, China Applicant after: SHANDONG ZHIYANG ELECTRIC CO., LTD. Applicant after: DONGYING POWER SUPPLY COMPANY, STATE GRID SHANDONG ELECTRIC POWER CO., LTD. Address before: 405 room 255086, block E, No. 135, Zibo Development Zone, Shandong, China Applicant before: SHANDONG ZHIYANG ELECTRIC CO., LTD. |
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Address after: 405 room 255086, block E, No. 135, Zibo Development Zone, Shandong, China Co-patentee after: DONGYING POWER SUPPLY COMPANY, STATE GRID SHANDONG ELECTRIC POWER CO., LTD. Patentee after: Zhiyang Innovation Technology Co., Ltd. Address before: 405 room 255086, block E, No. 135, Zibo Development Zone, Shandong, China Co-patentee before: DONGYING POWER SUPPLY COMPANY, STATE GRID SHANDONG ELECTRIC POWER CO., LTD. Patentee before: SHANDONG ZHIYANG ELECTRIC CO., LTD. |
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