CN107634507A - A kind of method and circuit of breaker unbalanced three-phase lines actuating breaker failure protection - Google Patents
A kind of method and circuit of breaker unbalanced three-phase lines actuating breaker failure protection Download PDFInfo
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- CN107634507A CN107634507A CN201710964285.4A CN201710964285A CN107634507A CN 107634507 A CN107634507 A CN 107634507A CN 201710964285 A CN201710964285 A CN 201710964285A CN 107634507 A CN107634507 A CN 107634507A
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- 238000010586 diagram Methods 0.000 description 6
- 238000000819 phase cycle Methods 0.000 description 3
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Abstract
The invention provides a kind of method and circuit of breaker unbalanced three-phase lines actuating breaker failure protection, this method is specially：Using the unbalanced three-phase lines relay tip of the generator transformer group in transformer station 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 simultaneously, actuating breaker failure protection acts, solve the problems, such as that the live phase position non-uniform protection of breaker three does not have actuating breaker failure protection loop, 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 network.
Description
Technical field
The present invention relates to breaker three phases un identical protection technical field, specially a kind of breaker unbalanced three-phase lines start
The method and circuit of 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 the phase position of breaker three 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 phase position non-uniform protection of breaker three of group does not have the loop of actuating breaker failure protection, and 220kV circuits are operated using split-phase in addition
During breaker, due to a variety of causes, when system is in unbalanced three-phase lines running 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.
The content of the invention
To achieve the above object, the present invention provides following technical scheme：A kind of breaker unbalanced three-phase lines start failure protection is protected
The method of shield, this method are specially：Unbalanced three-phase lines relay tip using the generator transformer group in transformer station is as opening
One of dynamic failure is opened into and the two-way that the contact is respectively connected to the relay operation case of net control office by cable trips back
Road, complete three phases un identical protection and start TJR coils, then by TJR coil start failure protections, while failure criterion meets, starts and loses
Clever protection act.
As a kind of preferable technical scheme of the present invention, this method can also be：Directly by breaker protection in net control office
The three phases un identical protection action output clamping of cabinet, which is opened, makes it not act on circuit breaker trip, is served only for actuating breaker failure protection,
And unbalanced three-phase lines in breaker protection cabinet are outputed into contact and are respectively connected to breaker operation cabinet two-way trip(ping) circuit, complete three
Phase non-uniform protection starts TJR coils, then by TJR start failure protections, while failure criterion meets, actuating breaker failure protection action.
The other present invention have also been devised a kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection, and the circuit is by non-complete
Phase protective loop, non-whole phase protection delay separating brake, switching winding, U phases distant place sub-gate circuit and for each loop power supply
Power supply is formed, and the non-whole phase protection loop is connected between power positive cathode；The non-whole phase protection loop, non-whole phase protection
Delay separating brake, switching winding and U phases distant place sub-gate circuit are connected in parallel successively.
As a kind of preferable technical scheme of the present invention, the non-whole phase protection loop includes being sequentially connected in series from positive source
A distant place/local operation switching switch S10, blocking by low pressure operational relay K03 normally closed contacts and circuit breaker trip coil
Y02, and S01 breakers are provided between circuit breaker trip coil Y02 and blocking by low pressure operational relay K03 normally closed contacts
Normal opened contact is aided in, is led between blocking by low pressure operational relay K03 normally closed contacts and S01 breakers the auxiliary normal opened contact
Cross tripping relay K02 normal opened contacts and be connected to power end.
As a kind of preferable technical scheme of the present invention, the non-whole phase protection delay separating brake includes going here and there successively from power end
Manual operation button S12, a distant place/local operation switching switch S10, the blocking by low pressure operational relay K03 normally closed contacts of connection
With tripping relay K02 coils.
As a kind of preferable technical scheme of the present invention, the distant place/local operation switching switch S10 and blocking by low pressure
Power end is connected to by unbalanced three-phase lines relay K07 normal opened contacts between operational relay K03 normally closed contacts.
As a kind of preferable technical scheme of the present invention, the blocking by low pressure operational relay K03 normally closed contacts and jump
Power end is connected to by blocking by low pressure operational relay K03 normal opened contacts again between lock relay K02 coils.
As a kind of preferable technical scheme of the present invention, the switching winding includes the two groups of breakers auxiliary being sequentially connected in series
Contact S01 and a unbalanced three-phase lines relay K07 coil, every group is composed in parallel by three-phase breaker auxiliary contact S01.
As a kind of preferable technical scheme of the present invention, the U phases distant place sub-gate circuit is pressed by one group of SF6 being sequentially connected in series
Power low normally-closed contact P2 and blocking by low pressure operational relay K03 coil form, and the low normally-closed contact P2 of this group of SF6 pressure is by three-phase
Normally-closed contact P2 is composed in parallel.
The beneficial effects of the invention are as follows：The present invention by cable by relay tip first by being respectively connected to net control office
The two-way trip(ping) circuit of relay operation case starts TJR coils to complete three phases un identical protection, then by TJR coil start failure protections
Protection act, solve the problems, such as that the live phase position non-uniform protection of breaker three does not have actuating breaker failure protection loop；Its deuterzooid
Invention also realizes self-holding circuit by three phases un identical protection exit relay, and needs by certain manual operation
Involution can be carried out, can effectively be prevented because breaker body unbalanced three-phase lines act the hair of multiple " jump " phenomenon of generation breaker
It is raw, so that it is guaranteed that the safe and stable operation of equipment and power network.
Brief description of the drawings
Fig. 1 is the inconsistent actuating breaker failure protection schematic diagram of the phase position of breaker three of the present invention；
Fig. 2 is the inconsistent actuating breaker failure protection wiring diagram of the phase position of breaker three of the present invention；
Fig. 3 is that the present invention enables breaker protection cabinet perfect in shape and function unbalanced three-phase lines actuating breaker failure protection schematic diagram；
Fig. 4 is that the present invention enables breaker protection 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
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment 1
As depicted in figs. 1 and 2, the present invention provides a kind of technical scheme：A kind of breaker unbalanced three-phase lines start failure protection is protected
The method of shield, this method are specially：
One of the unbalanced three-phase lines relay tip of generator transformer group in transformer station 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 implementation condition required for this method at the scene, this method is selected, looks for the cable of original route
Standby 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 not by zero stream locking, and by breaker protection 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, when can not there is no the equipment such as cable at the scene, this method is selected, 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 operation of breaker operation cabinet two-way in shield cabinet
Loop 4D2-4D97 and 4D8-4D101 secondary electric wiring；Realize the function of starting protection failure.
Embodiment 3：
As shown in figure 5, the present invention have also been devised a kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection, the circuit
From non-whole phase protection loop, non-whole phase protection delay separating brake, switching winding, U phases distant place sub-gate circuit and for each loop
The power supply composition of power supply, the non-whole phase protection loop is connected between power positive cathode；It is the non-whole phase protection loop, non-complete
Mutually protection delay separating brake, switching winding and U phases distant place sub-gate circuit are connected in parallel successively.
The non-whole phase protection loop is included from the distant place that positive source 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 provided 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
Operation 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 up 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 network fortune
OK.
To sum up, relay operation case of the present invention first by the way that relay tip to be respectively connected to net control office by cable
Two-way trip(ping) circuit starts TJR coils to complete three phases un identical protection, then is acted by TJR coils actuating breaker failure protection, solves
The live phase position non-uniform protection of breaker three does not have the problem of actuating breaker failure protection loop；Secondly the present invention also passes through three-phase
Non-uniform protection exit relay realizes self-holding circuit, and needs that by certain manual operation involution could be carried out, can
Effectively to prevent because breaker body unbalanced three-phase lines act the generation of multiple " jump " phenomenon of generation breaker, so that it is guaranteed that setting
The standby and safe and stable operation of power network.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention
It is determined that or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized
It is set to and covers other all these variations or modifications.
Claims (9)
- A kind of 1. method of breaker unbalanced three-phase lines actuating breaker failure protection, it is characterised in thatThis method is specially：Using the unbalanced three-phase lines relay tip of the generator transformer group in transformer station as start failure protection One open into and the contact being respectively connected to the two-way trip(ping) circuit of the relay operation case of net control office by cable, completed Three phases un identical protection starts TJR coils, then by TJR coil start failure protections, while failure criterion meets, actuating breaker failure protection moves Make.
- A kind of 2. method of breaker unbalanced three-phase lines actuating breaker failure protection according to claim 1, it is characterised in thatThis method can also be：Directly the three phases un identical protection action output clamping of breaker protection cabinet in net control office is opened It is not acted on circuit breaker trip, be served only for actuating breaker failure protection, and unbalanced three-phase lines in breaker protection cabinet are outputed Contact is respectively connected to breaker operation cabinet two-way trip(ping) circuit, completes three phases un identical protection and starts TJR coils, then is opened by TJR Dynamic failure, while failure criterion meets, actuating breaker failure protection action.
- A kind of 3. circuit of breaker unbalanced three-phase lines actuating breaker failure protection, it is characterised in that：The circuit is by non-whole phase protection loop, non-whole phase protection delay separating brake, switching winding, U phases distant place sub-gate circuit and use In the power supply composition to each loop power supply, the non-whole phase protection loop is connected between power positive cathode；The non-three phase is protected Shield loop, non-whole phase protection delay separating brake, switching winding and U phases distant place sub-gate circuit are connected in parallel successively.
- A kind of 4. circuit of breaker unbalanced three-phase lines actuating breaker failure protection according to claim 3, it is characterised in that：The non-whole phase protection loop includes low from the distant place that positive source 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 provided 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.
- A kind of 5. circuit of breaker unbalanced three-phase lines actuating breaker failure protection according to claim 3, 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.
- A kind of 6. circuit of breaker unbalanced three-phase lines actuating breaker failure protection according to claim 5, it is characterised in that：The distant place/pass through three-phase between 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.
- A kind of 7. circuit of breaker unbalanced three-phase lines actuating breaker failure protection according to claim 5, 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.
- 8. a kind of circuit of breaker unbalanced three-phase lines actuating breaker failure protection according to claim 3,It is characterized in that：The switching winding includes two groups of breaker auxiliary contact S01 being sequentially connected in series and a three-phase differs Relay K07 coils are caused, every group is composed in parallel by three-phase breaker auxiliary contact S01.
- A kind of 9. circuit of breaker unbalanced three-phase lines actuating breaker failure protection according to claim 3, it is characterised in that：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 Electrical equipment K03 coils are formed, and the low normally-closed contact P2 of this group of SF6 pressure is composed in parallel by three-phase normally-closed contact P2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710964285.4A CN107634507A (en) | 2017-10-17 | 2017-10-17 | A kind of method and circuit of breaker unbalanced three-phase lines actuating breaker failure protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710964285.4A CN107634507A (en) | 2017-10-17 | 2017-10-17 | A kind of method and circuit of breaker unbalanced three-phase lines actuating breaker failure protection |
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| CN107634507A true CN107634507A (en) | 2018-01-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542826A (en) * | 2019-09-23 | 2019-12-06 | 深圳供电局有限公司 | On-site calibration method for failure protection starting circuit of power grid transmission line breaker |
| CN110829351A (en) * | 2019-10-11 | 2020-02-21 | 中国电力科学研究院有限公司 | Intelligent control system and method for primary and secondary fusion circuit breaker |
| CN111641193A (en) * | 2020-05-19 | 2020-09-08 | 国网河南省电力公司电力科学研究院 | Self-adaptive double-bus failure protection method and device |
| 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 |
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| CN103928915A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Non-full-phase protecting circuit of circuit breaker |
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| CN206452102U (en) * | 2016-12-23 | 2017-08-29 | 大唐户县第二热电厂 | A kind of protection circuit of breaker unbalanced three-phase lines start failure protection |
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| CN103746349A (en) * | 2014-01-03 | 2014-04-23 | 浙江省电力设计院 | Circuit breaker failure protection mechanism of transformer substation and optimal configuration method for circuit breaker protection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542826A (en) * | 2019-09-23 | 2019-12-06 | 深圳供电局有限公司 | On-site calibration method for failure protection starting circuit of power grid transmission line breaker |
| CN110829351A (en) * | 2019-10-11 | 2020-02-21 | 中国电力科学研究院有限公司 | Intelligent control system and method for primary and secondary fusion circuit breaker |
| CN110829351B (en) * | 2019-10-11 | 2022-09-20 | 中国电力科学研究院有限公司 | Intelligent control system and method for primary and secondary fusion circuit breaker |
| CN111641193A (en) * | 2020-05-19 | 2020-09-08 | 国网河南省电力公司电力科学研究院 | Self-adaptive double-bus failure protection method and device |
| CN111641193B (en) * | 2020-05-19 | 2022-08-19 | 国网河南省电力公司电力科学研究院 | Self-adaptive double-bus failure protection method and device |
| 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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