CN207251195U - A kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection - Google Patents
A kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection Download PDFInfo
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- CN207251195U CN207251195U CN201721334112.6U CN201721334112U CN207251195U CN 207251195 U CN207251195 U CN 207251195U CN 201721334112 U CN201721334112 U CN 201721334112U CN 207251195 U CN207251195 U CN 207251195U
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Abstract
The utility model provides a kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection,Including non-whole phase protection circuit,Non-whole phase protection delay separating brake,Switching winding,U phases distant place sub-gate circuit and for the power supply of each loop power supply,Using the unbalanced three-phase lines relay tip of the generator transformer group in substation as one of start failure protection open into,And the contact is respectively connected to the two-way trip(ping) circuit of the relay operation case of net control office by cable,Complete three phases un identical protection and start TJR coils,Again by TJR coil start failure protections,Failure criterion meets at the same time,Actuating breaker failure protection acts,Solve the problems, such as that live three phase position non-uniform protection of breaker does not have actuating breaker failure protection circuit,The circuit realizes self-holding circuit by three phases un identical protection exit relay,And need that by certain manual operation involution could be carried out,Can effectively it prevent because breaker body unbalanced three-phase lines act the generation of multiple " jump " phenomenon of generation breaker,So that it is guaranteed that the safe and stable operation of equipment and power grid.
Description
Technical field
Breaker three phases un identical protection technical field is the utility model is related to, is specially a kind of breaker unbalanced three-phase lines
The circuit of actuating breaker failure protection.
Background technology
When open-phase operation operating mode occurs in generator transformer outlet breaker, there will be negative-sequence current to flow through generator
Stator winding, produced in generator causes rotor top layer, retaining ring to rotor with the rotating excitation field of twice of synchronous rotational speed, the magnetic field
Larger value of frequency multiplication electric current is flowed through, when serious, the burn of rotor will be caused.Generator has certain tolerance negative-sequence current energy
Power, but have certain limit.
To prevent generator from damaging, generator unit stator winding should be flowed through to the numerical value of negative-sequence current and the time is limited to necessarily
Within the scope of.When open-phase operation operating mode occurs in generator transformer outlet breaker, if three phase position of breaker differs
Cause protection act still to disconnect outlet breaker three-phase, then should disconnect breaker adjacent thereto by failure protection, one
Aspect can protect generator, on the other hand can prevent the unordered action of system zero-sequenceprotection.In scene, generator transformer
The three phase position non-uniform protection of breaker of group does not have the circuit of actuating breaker failure protection, and in addition 220kV circuits are operated using split-phase
During breaker, due to various reasons, when system is in unbalanced three-phase lines operating status, the negative phase-sequence, the zero sequence point that occur in system
Amount can the very big influence of the electrical equipment to primary equipment particularly non-resistance, secondary device may bypass the immediate leadership false tripping
Lock, thus it is serious to system safety and stability influence, rationally designed in practice and configure breaker body three-phase not
Consistent protection seems most important.
Utility model content
To achieve the above object, the utility model provides following technical solution：A kind of breaker unbalanced three-phase lines, which start, to be lost
Spirit protection circuit, including non-whole phase protection circuit, non-whole phase protection delay separating brake, switching winding, U phases distant place sub-gate circuit with
And for being connected to the power supply of each loop power supply, the non-whole phase protection circuit between power positive cathode；The non-three phase is protected
Shield circuit, non-whole phase protection delay separating brake, switching winding and U phases distant place sub-gate circuit are connected in parallel successively；
The U phases distant place sub-gate circuit is grasped by the low normally-closed contact P2 of one group of SF6 pressure and blocking by low pressure being sequentially connected in series
Make relay K03 coils composition, the low normally-closed contact P2 of this group of SF6 pressure is composed in parallel by three-phase normally-closed contact P2；
The switching winding includes the two groups of breaker auxiliary contact S01 and a unbalanced three-phase lines relay being sequentially connected in series
K07 coils, every group is composed in parallel by three-phase breaker auxiliary contact S01.As a kind of preferable technical solution of the utility model,
The non-whole phase protection circuit is included from the distant place that positive pole is sequentially connected in series/local operation switching switch S10, blocking by low pressure
Operational relay K03 normally closed contacts and circuit breaker trip coil Y02, and in circuit breaker trip coil Y02 and blocking by low pressure
S01 breakers auxiliary normal opened contact, the blocking by low pressure operational relay are equipped between operational relay K03 normally closed contacts
Power end is connected to by tripping relay K02 normal opened contacts between K03 normally closed contacts and S01 breakers auxiliary normal opened contact.
As a kind of preferable technical solution of the utility model, non-whole phase protection delay separating brake include from power end according to
Manual operation button S12, a distant place/local operation switching switch S10, the blocking by low pressure operational relay K03 of secondary series connection are normally closed
Contact and tripping relay K02 coils.
It is low as a kind of preferable technical solution of the utility model, the distant place/local operation switching switch S10 and pressure
Power end is connected to by unbalanced three-phase lines relay K07 normal opened contacts between lock operation relay K03 normally closed contacts.
As a kind of preferable technical solution of the utility model, the blocking by low pressure operational relay K03 normally closed contacts
Power end is connected to by blocking by low pressure operational relay K03 normal opened contacts again between tripping relay K02 coils.
The beneficial effects of the utility model are：The utility model is first by the way that relay tip is respectively connected to by cable
The two-way trip(ping) circuit of the relay operation case of net control office starts TJR coils to complete three phases un identical protection, then by TJR coils
Actuating breaker failure protection acts, and solving live three phase position non-uniform protection of breaker does not have asking for actuating breaker failure protection circuit
Topic；Secondly the utility model also realizes self-holding circuit by three phases un identical protection exit relay, and needs by one
Fixed manual operation could carry out involution, can effectively prevent because breaker body unbalanced three-phase lines action generation breaker is multiple
The generation of " jump " phenomenon, so that it is guaranteed that the safe and stable operation of equipment and power grid.
Brief description of the drawings
Fig. 1 is the inconsistent actuating breaker failure protection schematic diagram of three phase position of the utility model breaker；
Fig. 2 is the inconsistent actuating breaker failure protection wiring diagram of three phase position of the utility model breaker；
Fig. 3 enables breaker for the utility model and protects cabinet perfect in shape and function unbalanced three-phase lines actuating breaker failure protection schematic diagram；
Fig. 4 enables breaker for the utility model and protects cabinet perfect in shape and function unbalanced three-phase lines actuating breaker failure protection wiring diagram；
Fig. 5 is the circuit diagram of three phases un identical protection.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
Embodiment 1
As depicted in figs. 1 and 2, the utility model provides a kind of technical solution：A kind of breaker unbalanced three-phase lines, which start, to be lost
The method of spirit protection, this method are specially：
One of the unbalanced three-phase lines relay tip of generator transformer group in substation as start failure protection is opened
Enter, and the contact is respectively connected to two-way the trip(ping) circuit 4D2-4D97 and 4D8- of the relay operation case of net control office by cable
In 4D101, complete three phases un identical protection and start TJR coils, then by TJR coil start failure protections, at the same failure criterion (zero sequence and
Negative phase-sequence) meet, actuating breaker failure protection action, exemplified by the live key wiring diagram of this method as shown in Figure 1.
Therefore, when can possess the required implementation condition of this method at the scene, this method is selected, looks for the cable of original route
Spare core reapposes cable by breaker body access operation case two-way trip(ping) circuit, realizes the work(of actuating breaker failure protection
Can, it is easy to operate.
Embodiment 2：
As shown in Figure 3 and Figure 4, the method for breaker unbalanced three-phase lines actuating breaker failure protection is：Directly net control office is interrupted
Road device, which protects the three phases un identical protection of cabinet to act output clamping and open, makes it not act on circuit breaker trip, is served only for starting and loses
Spirit protection, three phases un identical protection control word flow locking according to by zero, then zero-sequence current definite value can use former save to adjust at protection
The definite value 0.2A given, control word can also use three phases un identical protection from zero stream locking, and breaker is protected in cabinet
Unbalanced three-phase lines output contact 15D22-15D89 and 15D25-15D95 and are respectively connected to breaker operation cabinet two-way trip(ping) circuit
(connection is done directly in screen) in 4D2-4D97 and 4D8-4D101, completes three phases un identical protection and start TJR coils, then by TJR
Start failure protection, while failure criterion (zero sequence and negative phase-sequence) meets, actuating breaker failure protection action.
Therefore, this method can be selected at the scene without cable when equipment, is protected by being done directly breaker in screen
Unbalanced three-phase lines output contact 15D22-15D89 and 15D25-15D95 and are respectively connected to the tripping of breaker operation cabinet two-way in shield cabinet
The secondary electric wiring of circuit 4D2-4D97 and 4D8-4D101；Realize the function of starting protection failure.
Embodiment 3：
As shown in figure 5, the utility model have also been devised a kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection, should
Circuit is from non-whole phase protection circuit, non-whole phase protection delay separating brake, switching winding, U phases distant place sub-gate circuit and for each
The power supply composition of loop power supply, the non-whole phase protection circuit is connected between power positive cathode；The non-whole phase protection circuit,
Non-whole phase protection delay separating brake, switching winding and U phases distant place sub-gate circuit are connected in parallel successively.
The non-whole phase protection circuit is included from the distant place that positive pole is sequentially connected in series/local operation switching switch S10, pressure
The low lock operation relay K03 normally closed contacts of power and circuit breaker trip coil Y02, and in circuit breaker trip coil Y02 and pressure
S01 breakers auxiliary normal opened contact, the blocking by low pressure operation are equipped between the low lock operation relay K03 normally closed contacts of power
Electricity is connected to by tripping relay K02 normal opened contacts between relay K03 normally closed contacts and S01 breakers auxiliary normal opened contact
Source.
Manual operation button S12 that non-whole phase protection delay separating brake includes being sequentially connected in series from power end, a distant place/on the spot
Operate switching switch S10, blocking by low pressure operational relay K03 normally closed contacts and tripping relay K02 coils；The distant place/
Pass through unbalanced three-phase lines relay between local operation switching switch S10 and blocking by low pressure operational relay K03 normally closed contacts
K07 normal opened contacts are connected to power end；Blocking by low pressure operational relay K03 normally closed contacts and tripping relay the K02 lines
Power end is connected to by blocking by low pressure operational relay K03 normal opened contacts again between circle.
The switching winding includes the two groups of short-circuiting device auxiliary contact S01 and a unbalanced three-phase lines relay being sequentially connected in series
K07 coils, every group is composed in parallel by three-phase breaker auxiliary contact S01.
The U phases distant place sub-gate circuit is grasped by the low normally-closed contact P2 of one group of SF6 pressure and blocking by low pressure being sequentially connected in series
Make relay K03 coils composition, the low normally-closed contact P2 of this group of SF6 pressure is made of three-phase normally-closed contact P2.
The circuit of breaker unbalanced three-phase lines actuating breaker failure protection after engineered, goes out cause for gossip by three phases un identical protection
Existing self-holding circuit, and need that by certain manual operation involution could be carried out, can effectively it prevent because of breaker body
The generation of multiple " jump " phenomenon of breaker occurs for unbalanced three-phase lines action, so that it is guaranteed that equipment and the safety and stability of power grid fortune
OK.
To sum up, relay operation of the utility model first by the way that relay tip to be respectively connected to net control office by cable
The two-way trip(ping) circuit of case starts TJR coils to complete three phases un identical protection, then is acted by TJR coils actuating breaker failure protection,
Solve the problems, such as that live three phase position non-uniform protection of breaker does not have actuating breaker failure protection circuit；Next the utility model is also
Self-holding circuit is realized by three phases un identical protection exit relay, and needs to carry out by certain manual operation
Involution, can effectively prevent because breaker body unbalanced three-phase lines act the generation of multiple " jump " phenomenon of generation breaker, from
And ensure the safe and stable operation of equipment and power grid.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The scope of type is indicated by the appended claims rather than the foregoing description, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
So far, although those skilled in the art will appreciate that detailed herein have shown and described the more of the utility model
A exemplary embodiment, still, still can be public according to the utility model in the case where not departing from the spirit and scope of the utility model
The content opened directly determines or derives many other variations or modifications for meeting the utility model principle.Therefore, this practicality is new
The scope of type is understood that and regards as to cover other all these variations or modifications.
Claims (5)
- A kind of 1. circuit of breaker unbalanced three-phase lines actuating breaker failure protection, it is characterised in that：Including non-whole phase protection circuit, non-whole phase protection delay separating brake, switching winding, U phases distant place sub-gate circuit and for The power supply of each loop power supply, the non-whole phase protection circuit are connected between power positive cathode；It is the non-whole phase protection circuit, non- Complete mutually protection delay separating brake, switching winding and U phases distant place sub-gate circuit are connected in parallel successively；The U phases distant place sub-gate circuit by the low normally-closed contact P2 of one group of SF6 pressure and blocking by low pressure that are sequentially connected in series operate after Electric appliance K03 coils form, and the low normally-closed contact P2 of this group of SF6 pressure is composed in parallel by three-phase normally-closed contact P2；The switching winding includes the two groups of breaker auxiliary contact S01 and a unbalanced three-phase lines relay K07 being sequentially connected in series Coil, every group is composed in parallel by three-phase breaker auxiliary contact S01.
- 2. circuit according to claim 1, it is characterised in that：The non-whole phase protection circuit includes low from the distant place that positive pole is sequentially connected in series/local operation switching switch S10, pressure Lock operation relay K03 normally closed contacts and circuit breaker trip coil Y02, and it is low with pressure in circuit breaker trip coil Y02 S01 breakers auxiliary normal opened contact is equipped between lock operation relay K03 normally closed contacts, the blocking by low pressure operates relay Power supply is connected to by tripping relay K02 normal opened contacts between device K03 normally closed contacts and S01 breakers auxiliary normal opened contact End.
- 3. circuit according to claim 1, it is characterised in that：The non-whole phase protection delay separating brake includes manual operation button S12, the distant place/local operation being sequentially connected in series from power end Switching switch S10, blocking by low pressure operational relay K03 normally closed contacts and tripping relay K02 coils.
- 4. circuit according to claim 3, it is characterised in that：Pass through three-phase between the distant place/local operation switching switch S10 and blocking by low pressure operational relay K03 normally closed contacts Inconsistent relay K07 normal opened contacts are connected to power end.
- 5. circuit according to claim 3, it is characterised in that：Closed again by the way that pressure is low between blocking by low pressure operational relay K03 normally closed contacts and tripping relay the K02 coils Lock operational relay K03 normal opened contacts are connected to power end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721334112.6U CN207251195U (en) | 2017-10-17 | 2017-10-17 | A kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721334112.6U CN207251195U (en) | 2017-10-17 | 2017-10-17 | A kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection |
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| Publication Number | Publication Date |
|---|---|
| CN207251195U true CN207251195U (en) | 2018-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721334112.6U Active CN207251195U (en) | 2017-10-17 | 2017-10-17 | A kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110880742A (en) * | 2019-12-13 | 2020-03-13 | 深圳供电局有限公司 | High-voltage circuit breaker body three-phase inconsistent protection secondary circuit structure |
| CN110970868A (en) * | 2019-12-13 | 2020-04-07 | 深圳供电局有限公司 | Method and system for realizing three-phase inconsistent protection action logic of electrical quantity of circuit breaker |
| CN112653106A (en) * | 2020-12-10 | 2021-04-13 | 中水东北勘测设计研究有限责任公司 | Method for starting failure loop of intelligent hydropower station circuit breaker failure protection device |
| CN113555846A (en) * | 2021-07-23 | 2021-10-26 | 华能平凉发电有限责任公司 | 3/2 wiring generator transformer group non-full-phase starting failure protection method, device and equipment |
-
2017
- 2017-10-17 CN CN201721334112.6U patent/CN207251195U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110880742A (en) * | 2019-12-13 | 2020-03-13 | 深圳供电局有限公司 | High-voltage circuit breaker body three-phase inconsistent protection secondary circuit structure |
| CN110970868A (en) * | 2019-12-13 | 2020-04-07 | 深圳供电局有限公司 | Method and system for realizing three-phase inconsistent protection action logic of electrical quantity of circuit breaker |
| CN112653106A (en) * | 2020-12-10 | 2021-04-13 | 中水东北勘测设计研究有限责任公司 | Method for starting failure loop of intelligent hydropower station circuit breaker failure protection device |
| CN112653106B (en) * | 2020-12-10 | 2022-09-13 | 中水东北勘测设计研究有限责任公司 | Method for starting failure loop of intelligent hydropower station circuit breaker failure protection device |
| CN113555846A (en) * | 2021-07-23 | 2021-10-26 | 华能平凉发电有限责任公司 | 3/2 wiring generator transformer group non-full-phase starting failure protection method, device and equipment |
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