CN107994575B - Secondary circuit of high-voltage circuit breaker - Google Patents
Secondary circuit of high-voltage circuit breaker Download PDFInfo
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- CN107994575B CN107994575B CN201711411815.9A CN201711411815A CN107994575B CN 107994575 B CN107994575 B CN 107994575B CN 201711411815 A CN201711411815 A CN 201711411815A CN 107994575 B CN107994575 B CN 107994575B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The invention provides a secondary circuit of a high-voltage circuit breaker, which can solve the problem of synchronism between different poles and the same pole after two double-break circuit breakers are connected in series and realize the functions of anti-tripping and non-full-phase protection of a secondary control circuit. The method comprises four loops of opening, closing, anti-tripping protection and non-full-phase protection; the opening circuit comprises a parallel branch consisting of an A, B phase opening coil branch and a C phase opening coil branch which are connected in series, a low oil pressure opening blocking auxiliary relay normally closed contact and an SF6 low pressure air blocking auxiliary relay normally closed contact; the closing loop comprises a parallel branch consisting of an A, B phase closing coil branch and a C phase closing coil branch which are connected in series, and a low oil pressure closing and locking auxiliary relay normally closed contact and an SF6 low pressure air locking auxiliary relay normally closed contact; the anti-jump loop comprises A, B and a C-phase anti-jump loop; the non-full-phase protection circuit comprises three branches connected in parallel, namely an auxiliary contact branch and a non-full-phase time relay 47T1 connected in series, and non-full-phase time relays 47TX1 and 47TY 1.
Description
Technical Field
The invention relates to protection of secondary control of a circuit breaker, in particular to a secondary circuit of a high-voltage circuit breaker.
Background
With the high-speed development of the high-voltage direct-current transmission system, the alternating-current side of the direct-current transmission system needs to switch a filter group circuit breaker of a filter capacitor bank. For the high recovery voltage of the capacitive current of the 1100 kV-level small filter group circuit breaker, the current domestic and foreign solution is to use two double-fracture circuit breakers connected in series to form a four-fracture small filter group circuit breaker. The problem of synchronism between different poles and synchronism between the same poles after two double-break circuit breakers are connected in series needs to be solved, and the functions of anti-tripping and non-full-phase protection of a secondary control loop of the circuit breaker need to be guaranteed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a secondary circuit of a high-voltage circuit breaker, which can solve the problems of synchronism between different poles and synchronism between the same poles after two double-break circuit breakers are connected in series and realize the functions of anti-tripping and non-full-phase protection of the secondary control circuit of the circuit breaker.
The invention is realized by the following technical scheme:
a high-voltage circuit breaker secondary circuit comprises an opening circuit, a closing circuit, an anti-tripping protection circuit and a non-full-phase protection circuit, wherein the opening circuit, the closing circuit, the anti-tripping protection circuit and the non-full-phase protection circuit are connected to an operating power supply of a circuit breaker;
the opening circuit comprises a parallel branch formed by connecting an A-phase opening coil branch, a B-phase opening coil branch and a C-phase opening coil branch in parallel, a low-oil-pressure opening blocking auxiliary relay normally closed contact and an SF6 low-pressure air blocking auxiliary relay normally closed contact in series; the phase A separating brake coil branch, the phase B separating brake coil branch and the phase C separating brake coil branch are respectively connected with a breaker separating brake control interface;
the switching-on loop comprises a parallel branch formed by connecting an A-phase switching-on coil branch, a B-phase switching-on coil branch and a C-phase switching-on coil branch in parallel, a low-oil-pressure switching-on latching auxiliary relay normally closed contact and an SF6 low-pressure air latching auxiliary relay normally closed contact which are connected in series; the phase A switching-on coil branch, the phase B switching-on coil branch and the phase C switching-on coil branch are respectively connected with a switching-on control interface of the circuit breaker;
the anti-tripping loop comprises an A-phase anti-tripping loop which is arranged corresponding to the switching-on loop and connected with the A-phase switching-on coil branch in parallel, a B-phase anti-tripping loop which is connected with the B-phase switching-on coil branch in parallel and a C-phase anti-tripping loop which is connected with the C-phase switching-on coil branch in parallel;
the non-full-phase protection circuit comprises three branches connected in parallel, wherein the first branch comprises an auxiliary contact branch and a non-full-phase time relay 47T1 which are connected in series, the second branch comprises a non-full-phase time relay 47TX1, and the third branch comprises a non-full-phase time relay 47TY 1; the non-full phase time relay 47TX1 and the non-full phase time relay 47TY1 mate with the non-full phase time relay 47T 1.
Preferably, the phase a switching coil branch comprises a phase a1 auxiliary switch normally open contact 1, a phase a2 auxiliary switch normally open contact 1, a phase a1 switching coil and a phase a2 switching coil connected in series; the normally open contact of the A-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contact 2 of the A1-phase auxiliary switch and the normally open contact 2 of the A2-phase auxiliary switch which are connected in parallel, and then is connected in parallel with the normally open contact 1 of the A1-phase auxiliary switch and the normally open contact 1 of the A2-phase auxiliary switch which are connected in series;
the branch circuit of the B-phase brake separating coil comprises a B1-phase auxiliary switch normally open contact 1, a B2-phase auxiliary switch normally open contact 1, a B1-phase brake separating coil and a B2-phase brake separating coil which are connected in series; the normally open contact of the B-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contact 2 of the B1-phase auxiliary switch and the normally open contact 2 of the B2-phase auxiliary switch which are connected in parallel, and then is connected in parallel with the normally open contact 1 of the B1-phase auxiliary switch and the normally open contact 1 of the B2-phase auxiliary switch which are connected in series;
the branch circuit of the C-phase brake separating coil comprises a C1-phase auxiliary switch normally open contact 1, a C2-phase auxiliary switch normally open contact 1, a C1-phase brake separating coil and a C2-phase brake separating coil which are connected in series; the normally open contact of the C-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contact 2 of the C1-phase auxiliary switch and the normally open contact 2 of the C2-phase auxiliary switch which are connected in parallel, and then connected in parallel with the normally open contact 1 of the C1-phase auxiliary switch and the normally open contact 1 of the C2-phase auxiliary switch which are connected in series.
Preferably, the a-phase switching coil branch comprises a normally closed contact of the a-phase tripping-prevention relay 52YA, a normally closed contact 1 of an a 1-phase auxiliary switch, a switching coil of an a 1-phase auxiliary switch, a normally closed contact 1 of an a 2-phase auxiliary switch and a switching coil of an a 2-phase auxiliary switch which are connected in series;
the B-phase switching-on coil branch comprises a normally closed contact of a B-phase tripping-preventing relay 52YB, a B1-phase auxiliary switch normally closed contact 1, a B1-phase switching-on coil, a B2-phase auxiliary switch normally closed contact 1 and a B2-phase switching-on coil which are connected in series;
the C-phase switching-on coil branch comprises a normally closed contact of a C-phase tripping-preventing relay 52YC, a C1-phase auxiliary switch normally closed contact 1, a C1-phase switching-on coil, a C2-phase auxiliary switch normally closed contact 1 and a C2-phase switching-on coil which are connected in series.
Preferably, the phase a anti-jump loop comprises two phase a auxiliary switch normally open contacts 4 connected in parallel and connected in series with a phase a anti-jump relay 52 YA; the normally open contacts 4 of the two parallelly connected A-phase auxiliary switches are connected in parallel with the normally open contacts of the A-phase anti-tripping relay 52 YA;
the B-phase anti-tripping loop comprises another two B-phase auxiliary switch normally-open contacts 4 connected in parallel and a B-phase anti-tripping relay 52YB connected in series; the normally open contacts 4 of the two parallel-connected B-phase auxiliary switches are connected in parallel with the normally open contact of the B-phase anti-tripping relay 52 YB;
the C-phase anti-tripping loop comprises another two C-phase auxiliary switch normally-open contacts 4 connected in parallel and a C-phase anti-tripping relay 52YC connected in series; the two parallel C-phase auxiliary switch normally-open contacts 4 are connected in parallel with the normally-open contact of the C-phase anti-jump relay 52 YC.
Preferably, the auxiliary contact branch comprises an auxiliary switch normally-open contact and an auxiliary switch normally-closed contact parallel branch which are connected in series;
the auxiliary switch normally-open contact is formed by connecting an A1 phase auxiliary switch normally-open contact 3, an A2 phase auxiliary switch normally-open contact 3, a B1 phase auxiliary switch normally-open contact 3, a B2 phase auxiliary switch normally-open contact 3, a C1 phase auxiliary switch normally-open contact 3 and a C2 phase auxiliary switch normally-open contact in parallel to form 3;
the auxiliary switch normally closed contact is formed by connecting an A1 phase auxiliary switch normally closed contact 2, an A2 phase auxiliary switch normally closed contact 2, a B1 phase auxiliary switch normally closed contact 2, a B2 phase auxiliary switch normally closed contact 2, a C1 phase auxiliary switch normally closed contact 2 and a C2 phase auxiliary switch normally closed contact 2 in parallel.
Preferably, the auxiliary contact branch is connected in series with the non-full phase time relay 47T1 through a functional pressure plate.
Preferably, the second branch further includes a delay switch of the non-full-phase protection time relay 47T1 and a delay switch of the non-full-phase protection time relay 47TY1 connected in series with the non-full-phase time relay 47TX 1; the delay switch of the non-full-phase protection time relay 47T1 is connected in parallel with the normally open contact 1 of the non-full-phase protection time relay 47TX 1.
Preferably, the third branch further comprises a normally open contact 2 of a non-full phase time relay 47TX1 connected in series with a non-full phase time relay 47TY 1.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to a secondary circuit of a high-voltage circuit breaker, which is characterized in that after a closing signal is given, the circuit breaker is closed, a switching-off circuit is switched on through the conversion of a closing coil branch circuit, a relay in an anti-tripping protection circuit is enabled to act, the closing circuit is cut off, and if the closing signal is not removed at the moment, the switching-off signal is given again, and the closing coil branch circuit is disconnected. The tripping-proof relay is self-maintained through a normally-open contact which is closed by the tripping-proof relay, the closing circuit is ensured to be blocked, so that the breaker cannot be closed again, the tripping-proof relay 52Y resets until a closing signal is removed, the next closing can be carried out after the closing circuit is switched on, and the tripping phenomenon of the high-voltage breaker is prevented.
When the high-voltage circuit breaker in operation has half-pole or whole-pole opening, the non-full-phase protection loop is started, so that the control power voltage is directly added to the opening loop of each half-pole, and the phase-lacking operation of the high-voltage circuit breaker is avoided.
Furthermore, by matching the non-full-phase time relays of the three branches in the non-full-phase protection circuit, the control power voltage is directly applied to the opening circuit of each half pole, and each half pole is immediately opened, so that the phase-lacking operation of the high-voltage circuit breaker is avoided.
Through the series connection of the half-pole opening coils of the opening coils of all phases in the opening loop and the series connection of the half-pole closing coils of the closing coils of all phases in the closing loop, the opening synchronism among different poles of the high-voltage circuit breaker is less than 3ms, the opening synchronism among the same poles of the high-voltage circuit breaker is less than 2ms, the closing synchronism among the different poles of the high-voltage circuit breaker is less than 4ms, and the closing synchronism among the same poles of the high-voltage circuit breaker is less than 3 ms.
Drawings
Fig. 1 is a circuit diagram of the opening control loop of the present invention.
Fig. 2 is a circuit diagram of a closing control circuit of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention relates to a secondary circuit of a high-voltage circuit breaker, which comprises an opening circuit, a closing circuit, an anti-tripping protection circuit and a non-full-phase protection circuit, wherein the opening circuit, the closing circuit, the anti-tripping protection circuit and the non-full-phase protection circuit are connected to an operating power supply of the circuit breaker.
As shown in fig. 1, the secondary circuit of the high-voltage circuit breaker includes a switching-off circuit, and the switching-off circuit is connected in series with a parallel branch formed by connecting a switching-off coil branch of phase a, a switching-off coil branch of phase B and a switching-off coil branch of phase C in parallel.
The A-phase opening coil branch is connected in series with an A1-phase auxiliary switch normally open contact 1, an A2-phase auxiliary switch normally open contact 1, an A1-phase opening coil and an A2-phase opening coil;
the branch of the B-phase brake separating coil is connected in series with a B1-phase auxiliary switch normally open contact 1, a B2-phase auxiliary switch normally open contact 1, a B1-phase brake separating coil and a B2-phase brake separating coil;
the branch of the C-phase brake separating coil is connected in series with a C1-phase auxiliary switch normally open contact 1, a C2-phase auxiliary switch normally open contact 1, a C1-phase brake separating coil and a C2-phase brake separating coil.
The normally open contact of the A-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contacts 2 of the A1 and A2 auxiliary switches which are connected in parallel and used for preventing the non-full-phase protection time relay 47TX1 from being operated by mistake, and then is connected in parallel with the normally open contacts 1 of the A1 and A2 auxiliary switches which are connected in series in the branch of the A-phase separating coil.
The normally open contact of the B-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contact 2 of two parallel-connected B1 and B2 auxiliary switches for preventing the malfunction of the non-full-phase protection time relay 47TX1, and then connected in parallel with the normally open contact 1 of two series-connected B1 and B2 auxiliary switches in a branch circuit of the B-phase separating coil.
The normally open contact of the C-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contacts 2 of the two parallel-connected C1 and C2 auxiliary switches for preventing the non-full-phase protection time relay 47TX1 from misoperation, and then connected in parallel with the normally open contacts 1 of the two series-connected C1 and C2 auxiliary switches in the branch of the B-phase separating coil.
When the high-voltage circuit breaker is in a closing state, the normally open contact 1 of the auxiliary switch of the high-voltage circuit breaker is switched on, a switching-off operation signal is received, the normally open contact 1 of each phase of the auxiliary switch of the high-voltage circuit breaker, a normally closed contact of each phase of a switching-off coil, a low-oil pressure switching-off and locking auxiliary relay 63HL1X and a normally closed contact of an SF6 low-pressure air locking auxiliary relay 63GLX1 are switched on, the switching-off action of each phase of the switching-off coil is switched on, the switching-off loop is cut off, and the switching-on loop is.
As shown in fig. 2, the secondary circuit of the high-voltage circuit breaker includes a switching-on circuit, and the switching-on circuit includes a parallel branch formed by connecting in parallel an a-phase switching-on coil branch, a B-phase switching-on coil branch, and a C-phase switching-on coil branch in series.
The A-phase switching-on coil branch is connected in series with an A1-phase auxiliary switch normally-closed contact 1, an A1-phase switching-on coil, an A2-phase auxiliary switch normally-closed contact 1 and an A2-phase switching-on coil;
the branch of the B-phase switching-on coil is connected in series with a B1-phase auxiliary switch normally-closed contact 1, a B1-phase switching-on coil, a B2-phase auxiliary switch normally-closed contact 1 and a B2-phase switching-on coil;
the branch of the C-phase switching-on coil is connected in series with a C1-phase auxiliary switch normally closed contact 1, a C1-phase switching-on coil, a C2-phase auxiliary switch normally closed contact 1 and a C2-phase switching-on coil.
The A-phase switching-on coil branch is also connected in series with a normally closed contact of an A-phase tripping-prevention relay 52YA, the B-phase switching-on coil branch is also connected in series with a normally closed contact of a B-phase tripping-prevention relay 52YB, and the C-phase switching-on coil branch is also connected in series with a normally closed contact of a C-phase tripping-prevention relay 52 YC.
When the high-voltage circuit breaker is in an opening state, a closing operation signal is received, and the high-voltage circuit breaker auxiliary switch normally closed contact 1, a closing coil, a low-oil pressure closing and locking auxiliary relay normally closed contact 63HL2X and an SF6 low-pressure air locking auxiliary relay 63GLX1 normally closed contact are passed through each phase tripping-prevention relay normally closed contact 52Y, so that closing is conducted, the closing coil is actuated to perform closing action, the high-voltage circuit breaker is closed, the high-voltage circuit breaker auxiliary switch is driven to be switched, a closing loop is cut off, and an opening loop is conducted.
As shown in fig. 2, the secondary circuit of the high-voltage circuit breaker includes an anti-tripping protection circuit, and the anti-tripping circuit includes an a-phase anti-tripping circuit, a B-phase anti-tripping circuit, and a C-phase anti-tripping circuit.
The phase A anti-jump loop comprises another two parallel phase A auxiliary switch normally open contacts 4 connected in series with a phase A anti-jump relay 52 YA. The two parallel A-phase auxiliary switch normally-open contacts 4 are connected in parallel with the normally-open contact of the A-phase anti-jump relay 52 YA.
The B-phase anti-tripping loop comprises another two B-phase auxiliary switch normally-open contacts 4 connected in parallel and connected in series with a B-phase anti-tripping relay 52 YB. And the normally-open contacts 4 of the two parallel-connected B-phase auxiliary switches are connected in parallel with the normally-open contacts of the B-phase anti-tripping relay 52 YB.
The C-phase anti-jump loop comprises another two C-phase auxiliary switch normally-open contacts 4 connected in parallel and connected in series with a C-phase anti-jump relay 52 YC. The two parallel C-phase auxiliary switch normally-open contacts 4 are connected in parallel with the normally-open contact of the C-phase anti-jump relay 52 YC.
After a closing signal is given, the high-voltage circuit breaker is closed, the normally closed contact 1 of the auxiliary switch of the high-voltage circuit breaker is switched, the normally open contact 4 of the auxiliary switch of each phase of the high-voltage circuit breaker is closed to switch on a switching-off loop and enable the anti-tripping relay 52Y to act, the normally closed contact of the anti-tripping relay 52Y is switched off, and the switching-on loop is cut off. If the closing signal is not removed, the opening signal is given again, and the high-voltage breaker opens. The anti-tripping relay 52Y is self-maintained through the closed 52Y normally open contact, the anti-tripping relay 52Y normally closed contact in the closing loop is disconnected, the closing loop is not closed, and the high-voltage circuit breaker cannot be closed again. Until the closing signal is removed, the anti-tripping relay 52Y resets, and the next closing can be performed after the closing loop is switched on.
As shown in fig. 1, the secondary circuit of the high-voltage circuit breaker includes a non-full-phase protection circuit, the non-full-phase protection circuit includes three branches connected in parallel, the first branch includes an auxiliary contact branch and a non-full-phase time relay 47T1 connected in series, the auxiliary contact branch includes an auxiliary switch normally-open contact and an auxiliary switch normally-closed contact parallel branch connected in series, the auxiliary switch normally-open contact is formed by connecting an a 1-phase auxiliary switch normally-open contact 3, an a 2-phase auxiliary switch normally-open contact 3, a B1-phase auxiliary switch normally-open contact 3, a B2-phase auxiliary switch normally-open contact 3, a C1-phase auxiliary switch normally-open contact 3, a C2-phase auxiliary switch contact 3 in parallel, and the auxiliary switch normally-closed contact is formed by an a 1-phase auxiliary switch normally-closed contact 2, an a 2-phase auxiliary switch normally-closed contact 2, a B1-, A B2 phase auxiliary switch normally closed contact 2, a C1 phase auxiliary switch normally closed contact 2, a C2 phase auxiliary switch normally closed contact 2 parallel.
The non-full-phase protection time relay 47T1 is connected with the auxiliary contact branch in series through a function board TYB 3.
As shown in fig. 1, the second branch includes a delay switch of the non-full-phase protection time relay 47T1, a delay switch of the non-full-phase protection time relay 47TY1, and a non-full-phase protection time relay 47TX1 matched with the non-full-phase protection time relay 47TX1, which are connected in series, and the delay switch of the non-full-phase protection time relay 47T1 is connected in parallel with the normally open contact 1 of the non-full-phase protection time relay 47TX 1.
The third branch comprises a normally open contact 2 of the non-full-phase protection time relay 47TX1 and a non-full-phase protection time relay 47TY1 connected in series.
When the high-voltage circuit breaker in operation has a half pole missing or a whole pole operation, the corresponding transfer switch auxiliary contact 2 or 3 of the half pole is switched, therefore, the non-full-phase protection time relay 47T1 is electrified to be started, after the short delay and the non-full-phase protection time relay delay switch 47T1 are closed, the non-full-phase protection time relay delay switch 47TY1 is still in a closed state, at the moment, the non-full-phase protection time relay 47TX1 is electrified to be started, the normally open contacts 1 and 2 of the non-full-phase protection time relay 47TX1 and the normally open contact of the A, B, C phase non-full-phase protection time relay 47TX1 are closed, the non-full-phase protection relay 47TY1 is electrified and started, because the delay switch 47TY1 of the non-full-phase protective relay is opened in a delayed mode, the control power supply voltage is directly applied to the opening loop of each half pole, and each half pole is immediately opened, so that the phase-lacking operation of the high-voltage circuit breaker is avoided. When the non-full-phase fault disappears, the non-full-phase protection time relays 47T1 and 47TX1 lose power, and the A, B, C phase non-full-phase protection time relay 47TX1 normally open contact is opened again.
Claims (7)
1. A secondary circuit of a high-voltage circuit breaker is characterized by comprising an opening circuit, a closing circuit, an anti-tripping circuit and a non-full-phase protection circuit which are connected to an operating power supply of the circuit breaker;
the opening circuit comprises a parallel branch which is formed by connecting an A-phase opening coil branch, a B-phase opening coil branch and a C-phase opening coil branch in parallel in series, and the parallel branch is sequentially connected with a first low-oil-pressure opening latching auxiliary relay normally-closed contact and an SF6 low-pressure air latching auxiliary relay normally-closed contact in series; the phase A separating brake coil branch, the phase B separating brake coil branch and the phase C separating brake coil branch are respectively connected with a breaker separating brake control interface;
the switching-on loop comprises a parallel branch which is formed by connecting a phase A switching-on coil branch, a phase B switching-on coil branch and a phase C switching-on coil branch in parallel in series, and the parallel branch is sequentially connected with a second low-oil-pressure switching-on latching auxiliary relay normally-closed contact and an SF6 low-pressure air latching auxiliary relay normally-closed contact in series; the phase A switching-on coil branch, the phase B switching-on coil branch and the phase C switching-on coil branch are respectively connected with a switching-on control interface of the circuit breaker;
the anti-tripping loop comprises an A-phase anti-tripping loop which is arranged corresponding to the switching-on loop and connected with the A-phase switching-on coil branch in parallel, a B-phase anti-tripping loop which is connected with the B-phase switching-on coil branch in parallel and a C-phase anti-tripping loop which is connected with the C-phase switching-on coil branch in parallel;
the non-full-phase protection circuit comprises three branches connected in parallel, wherein the first branch comprises an auxiliary contact branch and a non-full-phase time relay 47T1 which are connected in series, the second branch comprises a non-full-phase time relay 47TX1, and the third branch comprises a non-full-phase time relay 47TY 1; the non-full-phase time relay 47TX1 and the non-full-phase time relay 47TY1 are mated with the non-full-phase time relay 47T 1;
the A-phase switching coil branch comprises an A1-phase auxiliary switch normally-open contact 1, an A2-phase auxiliary switch normally-open contact 1, an A1-phase switching coil and an A2-phase switching coil which are connected in series; the normally open contact of the A-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contact 2 of the A1-phase auxiliary switch and the normally open contact 2 of the A2-phase auxiliary switch which are connected in parallel, and then is connected in parallel with the normally open contact 1 of the A1-phase auxiliary switch and the normally open contact 1 of the A2-phase auxiliary switch which are connected in series;
the branch circuit of the B-phase brake separating coil comprises a B1-phase auxiliary switch normally open contact 1, a B2-phase auxiliary switch normally open contact 1, a B1-phase brake separating coil and a B2-phase brake separating coil which are connected in series; the normally open contact of the B-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contact 2 of the B1-phase auxiliary switch and the normally open contact 2 of the B2-phase auxiliary switch which are connected in parallel, and then is connected in parallel with the normally open contact 1 of the B1-phase auxiliary switch and the normally open contact 1 of the B2-phase auxiliary switch which are connected in series;
the branch circuit of the C-phase brake separating coil comprises a C1-phase auxiliary switch normally open contact 1, a C2-phase auxiliary switch normally open contact 1, a C1-phase brake separating coil and a C2-phase brake separating coil which are connected in series; the normally open contact of the C-phase non-full-phase protection time relay 47TX1 is connected in series with the normally open contact 2 of the C1-phase auxiliary switch and the normally open contact 2 of the C2-phase auxiliary switch which are connected in parallel, and then connected in parallel with the normally open contact 1 of the C1-phase auxiliary switch and the normally open contact 1 of the C2-phase auxiliary switch which are connected in series.
2. A secondary circuit of a high voltage circuit breaker according to claim 1,
the A-phase switching-on coil branch comprises a normally closed contact of an A-phase tripping-prevention relay 52YA, an A1-phase auxiliary switch normally closed contact 1, an A1-phase switching-on coil, an A2-phase auxiliary switch normally closed contact 1 and an A2-phase switching-on coil which are connected in series;
the B-phase switching-on coil branch comprises a normally closed contact of a B-phase tripping-preventing relay 52YB, a B1-phase auxiliary switch normally closed contact 1, a B1-phase switching-on coil, a B2-phase auxiliary switch normally closed contact 1 and a B2-phase switching-on coil which are connected in series;
the C-phase switching-on coil branch comprises a normally closed contact of a C-phase tripping-preventing relay 52YC, a C1-phase auxiliary switch normally closed contact 1, a C1-phase switching-on coil, a C2-phase auxiliary switch normally closed contact 1 and a C2-phase switching-on coil which are connected in series.
3. A secondary circuit of a high voltage circuit breaker according to claim 1,
the A-phase anti-tripping loop comprises two A-phase auxiliary switch normally-open contacts 4 which are connected in parallel and then are connected in series with an A-phase anti-tripping relay 52 YA; the normally open contacts 4 of the two parallelly connected A-phase auxiliary switches are connected in parallel with the normally open contacts of the A-phase anti-tripping relay 52 YA;
the B-phase anti-tripping loop comprises two B-phase auxiliary switch normally-open contacts 4 which are connected in parallel and then are connected in series with a B-phase anti-tripping relay 52 YB; the normally open contacts 4 of the two parallel-connected B-phase auxiliary switches are connected in parallel with the normally open contact of the B-phase anti-tripping relay 52 YB;
the C-phase anti-tripping loop comprises two C-phase auxiliary switch normally-open contacts 4 which are connected in parallel and then are connected in series with the C-phase anti-tripping relay 52 YC; the two parallel C-phase auxiliary switch normally-open contacts 4 are connected in parallel with the normally-open contact of the C-phase anti-jump relay 52 YC.
4. A secondary circuit of a high voltage circuit breaker according to claim 1,
the auxiliary contact branch comprises an auxiliary switch normally-open contact and an auxiliary switch normally-closed contact which are connected in series;
the auxiliary switch normally-open contact is formed by connecting an A1 phase auxiliary switch normally-open contact 3, an A2 phase auxiliary switch normally-open contact 3, a B1 phase auxiliary switch normally-open contact 3, a B2 phase auxiliary switch normally-open contact 3, a C1 phase auxiliary switch normally-open contact 3 and a C2 phase auxiliary switch normally-open contact in parallel to form 3;
the auxiliary switch normally closed contact is formed by connecting an A1 phase auxiliary switch normally closed contact 2, an A2 phase auxiliary switch normally closed contact 2, a B1 phase auxiliary switch normally closed contact 2, a B2 phase auxiliary switch normally closed contact 2, a C1 phase auxiliary switch normally closed contact 2 and a C2 phase auxiliary switch normally closed contact 2 in parallel.
5. The secondary circuit of a high-voltage circuit breaker according to claim 1, characterized in that the auxiliary contact branch is connected in series with the non-full-phase time relay 47T1 via a functional pressure plate.
6. The secondary circuit of the high-voltage circuit breaker according to claim 1, characterized in that the second branch further comprises a delay switch of a non-full-phase protection time relay 47T1 and a delay switch of a non-full-phase protection time relay 47TY1 in series with the non-full-phase time relay 47TX 1; the delay switch of the non-full-phase protection time relay 47T1 is connected in parallel with the normally open contact 1 of the non-full-phase protection time relay 47TX 1.
7. The secondary circuit of claim 1, wherein the third branch further comprises normally open contact 2 of a non-full phase time relay 47TX1 connected in series with a non-full phase time relay 47TY 1.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109088444B (en) * | 2018-08-28 | 2020-07-21 | 国网湖南省电力有限公司 | Optimization method for non-full-phase protection action performance of direct-current receiving-end phase modulator |
| CN109216100B (en) * | 2018-09-09 | 2024-01-02 | 湛江电力有限公司 | Monitoring indication circuit of power switch vacuum circuit breaker |
| CN112653091B (en) * | 2020-12-14 | 2024-03-22 | 河南平高电气股份有限公司 | Locking control loop of circuit breaker |
| CN112701589B (en) * | 2020-12-30 | 2022-02-08 | 上海昱章电气股份有限公司 | Circuit breaker cabinet |
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