CN206158915U - A lose electronic type no. 3 of doing and select two guard signal circuit for protecting hydraulic generator - Google Patents
A lose electronic type no. 3 of doing and select two guard signal circuit for protecting hydraulic generator Download PDFInfo
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- CN206158915U CN206158915U CN201621181160.1U CN201621181160U CN206158915U CN 206158915 U CN206158915 U CN 206158915U CN 201621181160 U CN201621181160 U CN 201621181160U CN 206158915 U CN206158915 U CN 206158915U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a lose electronic type no. 3 of doing and select two guard signal circuit for protecting hydraulic generator, including three parallelly connected signal input branch roads, every branch road include with detection device parallel connection's contact switch and the signal relay coil of establishing ties with it, a signal output branch road is formed to per two contacts among the three signal relay, and two contacts in the same relay are not at same signal output branch road, parallelly connected back of all signal output branch roads and integrated protection relay coil series, the contact and the hydraulic generator actuating mechanism of integrated protection relay are connected. Because the utility model protects a contact switch among the signal circuit is normally closed contact, adopts and loses electric action principle, utilizes contact switch triggering signal relay to with signal relay's the integrated protection relay that normally closed contact controlled and hydraulic generator actuating mechanism is connected, realized not only that normal condition cuts down the protection that di na reached to water wheels down, even lose electric state at signal relay's power, also can realize the protection to hydraulic generator.
Description
Technical field
The utility model belongs to hydraulic mechanical protection technical field, is related to a kind of for protecting hydrogenerator
Dead electricity action type three selects two protection signal circuits.
Background technology
Conventional hydrogenerator protection circuit selects secondary circuit, loop to include three protection relays for energized action type three
Device, the coil of three protective relays is connected respectively with the protection signal source according to detection means signalizing activity, three relays
Contact in each two contact series constitute a bars output branch road, and per bars output branch road do not contain positioned at it is same after
Two contacts of electrical equipment, the circuit branch after all signal output branch circuit parallel connections and the executing agency for controlling hydrogenerator
It is connected in parallel；Above-mentioned signal protection source and signal relay adopt normally opened contact；Above-mentioned three select secondary circuit to be powered by power supply, its
Operation principle is, when the detection means signal that signal protection source receives meets (such as hydrogenerator of collection that imposes a condition
Rotating speed exceedes setting value) when, protection signal source is triggered closure, and corresponding signal relay obtains electric closure, and ought three signals
In relay at least two it is electric when, the executing agency's action (such as closing guide vane) with hydrogenerator, realize to water
The protection of electric hydraulic.
Easily there is problems with above-mentioned conventional water power hydraulic protection circuit：Secondary circuit is selected to lose power supply when three
When, signal relay is constantly in power failure state, and three select secondary circuit to turn on, i.e., three select secondary circuit to fail, and make hydraulic generator
Machine loses three protections for selecting secondary circuit.
Utility model content
Adopt the three easy problems failed because of dead electricity for selecting secondary circuit presence are protected for current hydrogenerator, this
Utility model provides a kind of dead electricity action type three for protecting hydrogenerator and selects two protection signal circuits, and it can be in dead electricity
Normal work under state.
The utility model selects two protection signal circuits, circuit to include the letter of three parallel connections there is provided a kind of dead electricity action type three
Number input branch road, signal input branch road two ends are connected with the first power supply, and every branch road includes and detection means is connected in parallel touches
Point switch and signal relay coil connected in series；Each two contact constitutes bars output in three signal relays
Two contacts in road, and same relay are not in same signal output branch road；After all signal output branch circuit parallel connections with it is comprehensive
The series connection of protective relay coil is closed, the branch road two ends after series connection are connected with second source, the contact of Comprehensive Protective Relay and water
Turbine generator executing agency connects；The contact of the contact switch and signal relay is normally-closed contact.
Above-mentioned dead electricity action type three selects two protection signal circuits, the relay to include two contacts.
Above-mentioned dead electricity action type three selects two protection signal circuits, three signal relays be respectively the first relay,
Second relay and the 3rd relay；First contact of the first relay constitutes first with the first contact series of the second relay
Signal output branch road, the second contact of the first relay and the first contact series composition secondary signal output of the 3rd relay
Road, the second contact of the second relay constitutes the 3rd signal output branch road with the second contact series of the 3rd relay；First letter
Connect with Comprehensive Protective Relay coil after number output branch road, secondary signal output branch road and the 3rd signal output branch circuit parallel connection,
Branch road two ends after series connection are connected with second source.
Above-mentioned dead electricity action type three selects two protection signal circuits, and the contact of the Comprehensive Protective Relay is normally opened contact.
Above-mentioned dead electricity action type three selects two protection signal circuits, and the detection means can be tachometer of measuring, pressure oil
Tank low oil pressure pressure sensor etc., contact switch carries out action according to detection means detection signal, triggers when detection signal meets
Trigger during condition, trigger condition is that the signal of detection means detection exceeds security settings scope, and such as tachometer of measuring is detected
Rotational speed of water turbine exceed pressure signal that setting value, pressure oil tank low oil pressure pressure sensor detect less than setting value etc..
Above-mentioned dead electricity action type three selects the operation principle of two protection signal circuits to be：
(1) when the signal of detection means detection is unsatisfactory for contact switch trigger condition, contact switch is in closure state,
Signal relay coil difference is powered, and the normally-closed contact of signal relay is off, Comprehensive Protective Relay deactivation coil
Electricity, the normally opened contact of Comprehensive Protective Relay is off, and the hydrogenerator being connected with Comprehensive Protective Relay is performed
Mechanism is failure to actuate；
(2) when the signal only one of which of detection means detection meets contact switch trigger condition, two contacts still open
Close and be in closure state, two signal relay coils are powered, the normally-closed contact of corresponding two signal relays is in disconnection shape
State, Comprehensive Protective Relay coil losing electricity, the normally opened contact of Comprehensive Protective Relay is off, with integrated protection relay
The hydrogenerator executing agency of device connection is failure to actuate；
(3) when the signal at least two of detection means detection meets contact switch trigger condition, trigger condition is met
Contact switch is off, corresponding signal relay coil dead electricity, and the normally-closed contact of signal relay is in closure state,
Comprehensive Protective Relay coil obtains electric, and the normally opened contact of Comprehensive Protective Relay is in closure state, with Comprehensive Protective Relay
The hydrogenerator executing agency action of contact portion；
(4) when the first power loss, three contact switch are in closure state, the coil losing electricity of three signal relays,
The normally-closed contact closure of three signal relays, Comprehensive Protective Relay obtains electric, and the contact of Comprehensive Protective Relay is in closure
State, the hydrogenerator executing agency action being connected with Comprehensive Protective Relay.
Compared with prior art, the utility model has the advantages that：
1st, select the contact switch in two protection signal circuits to be normally-closed contact due to the utility model dead electricity action type three, adopt
Dead electricity operating principle is used, using contact switch trigger relay, and the normally-closed contact control with signal relay and water wheels
The Comprehensive Protective Relay of generator executing agency connection, not only realizes under normal circumstances to the protection of hydrogenerator, i.e.,
Make the power loss state in signal relay, it is also possible to realize the protection to hydrogenerator.
2nd, because dead electricity action type three of the present utility model selects two protection signal circuits according to the signal of three detection means
Judged, it is to avoid because the signal according to single detection means carries out operating the malfunction or the tripping that cause.
3rd, because dead electricity action type three of the present utility model is selected, two protection signal circuit components are few, it is easy to maintenance to build,
It is adapted to be promoted in electrical equipment protection field.
Description of the drawings
Fig. 1 selects two protection signal circuit diagrams for the utility model dead electricity action type three.
Fig. 2 is the extension schematic diagram that dead electricity action type three selects two protection signal circuit relay electrical appliance parts in Fig. 1.
Specific embodiment
Clear, complete description is carried out to the technical scheme of each embodiment of the utility model below with reference to accompanying drawing, it is clear that
Described embodiment is only a part of embodiment of the present utility model, rather than the embodiment of whole.Based on the utility model
In embodiment, the resulting all other enforcement on the premise of creative work is not made of those of ordinary skill in the art
Example, belongs to the scope that the utility model is protected.
The detection means adopted in the present embodiment is for tachometer of measuring.
As shown in figure 1, the dead electricity action type three that the present embodiment is provided selects two protection signal circuits, it is included in three rotating speeds and surveys
Amount instrument (N1、N2、N3) connection three contact switch (the first contact switch S1, the second contact switch S2, the 3rd contact switch S3)
With three signal relays (the first relay KA1, the second relay KA2, the 3rd relay KA3), the first contact switch S1With
One relay KA1Coil is composed in series the first signal input branch road, the second contact switch S2With the second relay KA2Coil is connected
Composition secondary signal input branch road, the 3rd contact switch S3With the 3rd relay KA3Coil is composed in series the 3rd signal input
Road；Two ends and the first power supply V after first signal input branch road, secondary signal input branch road and the 3rd signal input branch circuit parallel connection1
Connection.
Three contact switch (S1、S2、S3) signal that receives passes through three signal relay (KA1、KA2、KA3) expanded
Exhibition output, concrete annexation is as shown in Fig. 2 the first relay KA1The first contact KA1- 1 and the second relay KA2First
Contact KA2- 1 is composed in series the first signal output branch road, the first relay KA1The second contact KA1- 2 and the 3rd relay KA3
The first contact KA3- 1 is composed in series secondary signal output branch road, the second relay KA2The second contact KA2- 2 and the 3rd relay
Device KA3The second contact KA3- 2 are composed in series the 3rd signal output branch road；First signal output branch road, secondary signal output branch road
With after the 3rd signal output branch circuit parallel connection with Comprehensive Protective Relay KA4Coil series connection, the branch road after series connection and second source V2Even
Connect.Comprehensive Protective Relay KA4Contact be connected with hydrogenerator executing agency, realize protection to hydrogenerator.
Above-mentioned contact switch (S1、S2、S3) and three signal relay (KA1、KA2、KA3) contact be it is normally closed touch
Point, Comprehensive Protective Relay KA4Contact is normally opened contact.
Above-mentioned dead electricity action type three selects two protection signal circuits, receives the sampled signal from three tachometer of measuring, only
When having sampled signal to meet to impose a condition (rotating speed exceedes setting value), protection signal circuit is will not to connect executing agency
, only when two or more sampled signal meets to impose a condition, protection signal circuit can just connect executing agency, so as to reject
Fall rub-out signal, improve the reliability of protection signal circuit, reduce the risk of malfunction and tripping.
Above-mentioned dead electricity action type three selects the two protection signal circuit courses of work to be：
(1) as three tachometer of measuring (N1、N2、N3) measurement hydrogenerator rotating speed be unsatisfactory for contact switch triggering bar
During part (rotating speed is not higher than setting value), three contact switch (S1、S2、S3) it is in closure state, three signal relay (KA1、
KA2、KA3) coil powered, the three signal relay (KA of difference1、KA2、KA3) normally-closed contact be off, according to Fig. 2
Signal trend is as can be seen that Comprehensive Protective Relay KA in circuit4Coil losing electricity, Comprehensive Protective Relay KA4Contact in disconnected
Open state, with Comprehensive Protective Relay KA4The hydrogenerator executing agency of normally opened contact connection is failure to actuate.
(2) when a tachometer of measuring is (with N1As a example by) measurement hydrogenerator rotating speed meet contact switch trigger condition
When (rotating speed is not higher than setting value), two contact switch (S2、S3) still in closure state, corresponding three signal relays
(KA2、KA3) two signal relay coils are powered in coil, the normally-closed contact of powered two signal relays is in disconnecting shape
State, according to signal trend in Fig. 2 circuits now Comprehensive Protective Relay KA is can be seen that4Coil place branch road is in disconnection
State, Comprehensive Protective Relay KA4Dead electricity, Comprehensive Protective Relay KA4Normally opened contact be off, with integrated protection
Relay KA4The hydrogenerator executing agency of contact portion is failure to actuate.
(3) when two tachometer of measuring are (with N1、N2As a example by) measurement hydrogenerator rotating speed meet contact switch triggering bar
During part (rotating speed is higher than setting value), contact switch (S1、S2) disconnect, corresponding signal relay (KA1、KA2) coil losing electricity, dead electricity
The normally-closed contact of signal relay be in closure state, according in Fig. 2 circuits signal trend as can be seen that now integrated protection after
Electrical equipment KA4Coil place branch road is in closure state, Comprehensive Protective Relay KA4Coil obtains electric, Comprehensive Protective Relay KA4
Normally opened contact be in closure state, with Comprehensive Protective Relay KA4The hydrogenerator executing agency action (ratio of contact portion
Such as close guide vane), realize the protection to hydrogenerator.
(4) when the first power loss, three contact switch (S1、S2、S3) it is in closure state, three signal relays
(KA1、KA2、KA3) coil losing electricity, three signal relay (KA1、KA2、KA3) the closing of contact, according to signal in Fig. 2 circuits
Trend can be seen that now Comprehensive Protective Relay KA4Coil place branch road is in closure state, Comprehensive Protective Relay KA4
Coil obtains electric, Comprehensive Protective Relay KA4Normally opened contact be in closure state, with Comprehensive Protective Relay KA4The water wheels of connection
The action of generator executing agency (such as closes guide vane), realizes the protection to hydrogenerator.
One of ordinary skill in the art will be appreciated that, embodiment here is to aid in reader and understands that this practicality is new
The principle of type, it should be understood that protection domain of the present utility model is not limited to such especially statement and embodiment.Ability
The those of ordinary skill in domain these technology enlightenments can make various without departing from the utility model according to disclosed in the utility model
Other various concrete deformations and combination of essence, these deformations and combination are still in protection domain of the present utility model.
Claims (4)
1. a kind of dead electricity action type three for protecting hydrogenerator selects two protection signal circuits, it is characterised in that including three
Signal input branch road in parallel, signal input branch road two ends are connected with the first power supply, and every branch road includes in parallel with detection means
The contact switch of connection and signal relay coil connected in series；Each two contact constitutes a letter in three signal relays
Two contacts in number output branch road, and same relay are not in same signal output branch road；All signal output branch roads are simultaneously
Connect with Comprehensive Protective Relay coil after connection, the branch road two ends after series connection are connected with second source, Comprehensive Protective Relay
Contact is connected with hydrogenerator executing agency；The contact of the contact switch and signal relay is normally-closed contact.
2. it is used to according to claim 1 protect the dead electricity action type three of hydrogenerator to select two protection signal circuits, it is special
Levy is that the relay includes two contacts.
3. it is used to according to claim 2 protect the dead electricity action type three of hydrogenerator to select two protection signal circuits, it is special
Levy is that three signal relays are respectively the first relay, the second relay and the 3rd relay；First relay
First contact series of the first contact and the second relay constitute the first signal output branch road, the second contact of the first relay with
The first contact series composition secondary signal output branch road of the 3rd relay, the second contact and the 3rd relay of the second relay
The second contact series constitute the 3rd signal output branch road；First signal output branch road, secondary signal output branch road and the 3rd letter
Number output branch circuit parallel connection after connect with Comprehensive Protective Relay coil, the branch road two ends after series connection are connected with second source.
4. it is used to protect the dead electricity action type three of hydrogenerator to select two protection signals electricity according to claims 1 to 3 is arbitrary
Road, it is characterised in that the contact of the Comprehensive Protective Relay is normally opened contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621181160.1U CN206158915U (en) | 2016-11-03 | 2016-11-03 | A lose electronic type no. 3 of doing and select two guard signal circuit for protecting hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621181160.1U CN206158915U (en) | 2016-11-03 | 2016-11-03 | A lose electronic type no. 3 of doing and select two guard signal circuit for protecting hydraulic generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158915U true CN206158915U (en) | 2017-05-10 |
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ID=58657330
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621181160.1U Active CN206158915U (en) | 2016-11-03 | 2016-11-03 | A lose electronic type no. 3 of doing and select two guard signal circuit for protecting hydraulic generator |
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| Country | Link |
|---|---|
| CN (1) | CN206158915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148921A (en) * | 2019-05-09 | 2019-08-20 | 许继电气股份有限公司 | A kind of relay protection and control method, system and M take N tripgear |
-
2016
- 2016-11-03 CN CN201621181160.1U patent/CN206158915U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148921A (en) * | 2019-05-09 | 2019-08-20 | 许继电气股份有限公司 | A kind of relay protection and control method, system and M take N tripgear |
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