CN114665449A - Non-full-phase protection system and method - Google Patents
Non-full-phase protection system and method Download PDFInfo
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- CN114665449A CN114665449A CN202210150732.3A CN202210150732A CN114665449A CN 114665449 A CN114665449 A CN 114665449A CN 202210150732 A CN202210150732 A CN 202210150732A CN 114665449 A CN114665449 A CN 114665449A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Abstract
The invention discloses a non-full-phase protection system and a method, wherein the system comprises a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module; the relay type non-full-phase protection module comprises a non-full-phase open-in module and a time relay; when the non-full-phase opening module outputs a non-full-phase action signal, the time relay starts timing, and the action signal is output after the first set value is delayed; the microcomputer type non-full-phase protection module comprises a logic operation module and a delay module which are connected; the logic operation module carries out non-full-phase logic operation based on the circuit breaker split-phase tripping position signal and the switching-on position signal; when the logic operation module judges that the circuit breaker is in a non-full-phase operation state, the delay module delays a second set value and then outputs an action signal; and when the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module both output action signals, tripping the relay. The invention realizes the good combination of the relay and the microcomputer type non-full-phase protection, and improves the safe and reliable operation capability of the circuit breaker.
Description
Technical Field
The invention belongs to the technical field of relay protection of power systems, and particularly relates to a non-full-phase protection system and a non-full-phase protection method.
Background
With the increase of power development and power demand, the number of high-voltage substations is increasing year by year, 220kV and above voltage class power grids commonly adopt circuit breakers with split-phase operation, and one-phase or two-phase circuit breakers are not combined or tripped due to reasons such as equipment quality and operation during the operation of the circuit breakers. The zero sequence and negative sequence current caused by the non-full-phase protection of the circuit breaker can generate adverse effect on the system, and the non-full-phase protection of the circuit breaker is required to be arranged in order to reduce the damage to the system caused by the non-full-phase protection of the circuit breaker.
The existing breaker non-full-phase protection method cannot accurately and reliably identify and reflect the non-full-phase operation condition of the breaker, and causes great harm to the safe and stable operation of a power grid.
Disclosure of Invention
Aiming at the problems, the invention provides a non-full-phase protection system and a non-full-phase protection method, which realize the good combination of relay and microcomputer non-full-phase protection, better play the advantages of relay and microcomputer protection and improve the safe and reliable operation capability of the circuit breaker.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a non-full phase protection system, comprising: a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module;
the relay type non-full-phase protection module comprises a non-full-phase open-in module and a time relay which are connected in series; the non-full-phase opening module is formed by combining a tripping position of a circuit breaker and a switching-on position in series and parallel; when the non-full-phase opening module outputs a non-full-phase action signal, the time relay starts timing, and the action signal is output after the first set value is delayed;
the microcomputer type non-full-phase protection module comprises a logic operation module and a delay module which are connected; the logic operation module carries out non-full-phase logic operation on the basis of the split-phase tripping position signal and the switching-on position signal of the circuit breaker; when the logic operation module judges that the circuit breaker is in a non-full-phase operation state, the delay module delays a second set value and then outputs an action signal;
the relay type non-full-phase protection module is connected with the output end of the microcomputer type non-full-phase protection module in series, and when the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module both output action signals, the relay is tripped.
Optionally, the microcomputer type non-full-phase protection module further includes a logic and module, inputs of the logic and module are respectively connected to the time relay and the logic operation module, and an output end of the logic and module is used for being connected to the relay and tripping the relay.
Optionally, the non-full-phase opening module comprises a three-phase trip position contact and a three-phase closing position contact;
the three-phase tripping position contact is formed by connecting a phase A tripping position contact, a phase B tripping position contact and a phase C tripping position contact of the circuit breaker in parallel;
the three-phase switching-on position contact is formed by connecting a circuit breaker A phase switching-on position contact, a breaker B phase switching-on position contact and a breaker C phase switching-on position contact in parallel;
the three-phase tripping position contact is connected with the three-phase closing position contact in series.
Optionally, the non-full-phase logic operation includes a circuit breaker position contact abnormality determination logic and a circuit breaker non-full-phase state determination logic;
the circuit breaker position contact abnormity judging logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the tripping position contact and the closing position contact of the A phase of the circuit breaker are both '1' or '0';
the B phase tripping position contact and the closing position contact of the breaker are both 1 or 0;
thirdly, the C-phase tripping position contact and the closing position contact of the circuit breaker are both '1' or '0';
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as '1';
any phase switching-on position of the A phase, the B phase and the C phase of the circuit breaker is '1';
and thirdly, the position of the circuit breaker is not abnormal.
Optionally, the first set value is equal to the second set value.
In a second aspect, the invention provides a non-full-phase protection system, which comprises a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module;
the relay type non-full-phase protection module comprises a non-full-phase opening module, and the non-full-phase opening module is formed by combining a tripping position and a switching-on position of a circuit breaker in series-parallel connection;
the microcomputer type non-full-phase protection module comprises a logic operation module and a time delay module, the logic operation module collects a breaker split-phase tripping position signal and a switching-on position signal and is connected with an output end of the non-full-phase switching-on module, non-full-phase logic operation is carried out on the basis of the breaker split-phase tripping position signal, the switching-on position signal and a non-full-phase switching-on signal output by the relay type non-full-phase protection module, whether the breaker is in a non-full-phase running state or not is judged, and when the breaker is judged to be in the non-full-phase running state, the breaker is tripped by action after time delay of the time delay module is set.
Optionally, the non-full-phase opening module comprises a three-phase trip position contact and a three-phase closing position contact;
the three-phase tripping position contact is formed by connecting a phase A tripping position contact, a phase B tripping position contact and a phase C tripping position contact of the circuit breaker in parallel;
the three-phase switching-on position contact is formed by connecting a circuit breaker A-phase switching-on position contact, a breaker B-phase switching-on position contact and a breaker C-phase switching-on position contact in parallel;
the three-phase tripping position contact is connected with the three-phase closing position contact in series.
Optionally, the non-full-phase logic operation includes a circuit breaker position contact abnormality determination logic and a circuit breaker non-full-phase state determination logic;
the circuit breaker position contact abnormity judging logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the tripping position contact and the closing position contact of the A phase of the circuit breaker are both '1' or '0';
the trip position contact and the closing position contact of the B phase of the circuit breaker are both '1' or '0';
thirdly, the C-phase tripping position contact and the closing position contact of the circuit breaker are both '1' or '0';
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as 1;
any phase switching-on position of the A phase, the B phase and the C phase of the circuit breaker is '1';
and thirdly, the position of the circuit breaker is not abnormal.
In a third aspect, the present invention provides a non-full-phase protection method, which is characterized by comprising:
when a non-full-phase opening module in a relay type non-full-phase protection module outputs a non-full-phase action signal, a time relay is triggered to start timing, and the action signal is output after a first set value is delayed; the non-full-phase opening module is formed by combining a tripping position of a circuit breaker and a switching-on position in series and parallel;
carrying out non-full-phase logic operation on the basis of the circuit breaker split-phase tripping position signal and the switching-on position signal by utilizing a logic operation module in the microcomputer type non-full-phase protection module; when the logic operation module judges that the circuit breaker is in a non-full-phase operation state, the delay module delays a second set value and then outputs an action signal;
and when the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module both output action signals, tripping the relay.
Optionally, the method further comprises:
and the action signals output by the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module are sent to the logic and module, and after the operation of the logic and module, the signals for tripping the relay are output.
In a third aspect, the present invention provides a non-full phase protection method, including:
outputting a non-full-phase open-in signal by using a non-full-phase open-in module in a relay type non-full-phase protection module, wherein the non-full-phase open-in module is formed by combining a tripping position of a circuit breaker and a switching-on position in series-parallel connection;
and when the circuit breaker is judged to be in the non-full-phase running state, the circuit breaker is delayed for a set time through the delay module and then is tripped.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a relay type and microcomputer combined non-full-phase protection method, which can accurately distinguish the non-full-phase operation state of a circuit breaker, solve the reliability problem of the existing non-full-phase protection, reduce the harm caused by the non-full-phase operation of the circuit breaker and greatly improve the safe and stable operation capability of a power system.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic diagram of the operation of a non-all-phase protection device in embodiment 1;
FIG. 2 is a schematic diagram showing the operation of the non-all-phase protection apparatus according to embodiment 2;
fig. 3 is a schematic diagram of the operation of the non-all-phase protection device in embodiment 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The application of the principles of the present invention will now be described in detail with reference to the accompanying drawings.
Example 1
An embodiment of the present invention provides a non-full-phase protection system, as shown in fig. 1, including: a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module;
the relay type non-full-phase protection module comprises a non-full-phase open-in module and a time relay which are connected in series; the non-full-phase opening module is formed by combining a tripping position of a circuit breaker and a switching-on position in series and parallel; when the non-full-phase opening module outputs a non-full-phase action signal, the time relay starts to time, and the action signal is output after the time delay of a first set value t 1;
the microcomputer type non-full-phase protection module comprises a logic operation module and a delay module which are connected; the logic operation module carries out non-full-phase logic operation on the basis of the split-phase tripping position signal and the switching-on position signal of the circuit breaker; when the logic operation module judges that the circuit breaker is in a non-full-phase operation state, namely when the non-full-phase opening state is '1', the delay module delays a second set value t2 and then outputs an action signal; the second set value is equal to the first set value;
the relay type non-full-phase protection module is connected with the output end of the microcomputer type non-full-phase protection module in series, and when the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module both output action signals, the relay is tripped.
In one specific implementation of an embodiment of the present invention, as shown in fig. 1, the non-full-phase opening module includes three-phase trip position contacts and three-phase closing position contacts;
the three-phase tripping position joint is formed by connecting a breaker A-phase tripping position joint TWJ-A, B-phase tripping position joint TWJ-B, C-phase tripping position joint TWJ-C in parallel;
the three-phase switching-on position contact is formed by connecting a breaker A phase switching-on position contact HWJ-A, B phase switching-on position contact HWJ-B, C phase switching-on position contact HWJ-C in parallel;
and the three-phase tripping position contact and the three-phase closing position contact are connected in series to obtain non-full-phase opening.
The non-full-phase logic operation comprises circuit breaker non-full-phase state discrimination logic and circuit breaker position contact abnormity discrimination logic;
the circuit breaker position contact abnormity judging logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the trip position contact TWJ _ A and the closing position contact HWJ _ A of the A phase of the circuit breaker are both '1' or both '0';
the trip position contact TWJ _ B and the closing position contact HWJ _ B of the phase B of the circuit breaker are both '1' or both '0';
thirdly, both a C-phase tripping position contact TWJ _ C and a switching-on position contact HWJ _ C of the circuit breaker are '1' or '0';
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as '1';
the closing position of any phase of the A phase, the B phase and the C phase of the breaker is 1;
and thirdly, the position of the circuit breaker is not abnormal.
Example 2
The embodiment of the invention provides a non-full-phase protection system, which comprises a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module; the action signal of the relay type non-full-phase protection module is connected into the microcomputer type non-full-phase protection module, whether the circuit breaker is in a non-full-phase operation state or not is comprehensively judged by the microcomputer type protection module, and when the circuit breaker is judged to be in a non-full-phase operation state, the action trips; the relay type non-full-phase protection module receives a non-full-phase open circuit formed by a tripping position and a switching-on position of a circuit breaker, and is connected with a time relay in series, when the non-full-phase open state is '1', the time relay starts to time, when the time delay of the time relay reaches a set value t1, an action outlet is formed, and an action signal is connected into the microcomputer type non-full-phase protection module. The microcomputer type non-full-phase protection module receives a split-phase tripping position of the circuit breaker, a switching-on position and a relay type non-full-phase protection module action signal, a processor arranged in the module carries out non-full-phase logic operation, whether the circuit breaker is in a non-full-phase operation state or not is judged, and when the circuit breaker is judged to be in the non-full-phase operation state, the action tripping is carried out. Specifically, as shown in fig. 2, based on embodiment 1, the embodiment of the present invention is different from embodiment 1 in that:
the microcomputer type non-full-phase protection module further comprises a logic and module, the input of the logic and module is respectively connected with the time relay and the logic operation module, and the output end of the logic and module is used for being connected with the relay and tripping the relay.
Example 3
The embodiment of the invention provides a non-full-phase protection system, which comprises a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module as shown in fig. 3; and an action outlet of the relay type non-full-phase protection module is connected into the microcomputer type non-full-phase protection module, the microcomputer type protection module comprehensively studies whether the circuit breaker is in a non-full-phase operation state, and when the circuit breaker is judged to be in non-full-phase operation, the circuit breaker is tripped by delay t. The relay type non-full-phase protection module receives a non-full-phase switch-in formed by a tripping position and a switching-on position of a circuit breaker and is connected into the microcomputer type non-full-phase protection module as an action signal. The microcomputer type non-full-phase protection module receives a split-phase tripping position of the circuit breaker, a switching-on position and a relay type non-full-phase protection module action signal, a processor arranged in the module carries out non-full-phase logic operation to judge whether the circuit breaker is in a non-full-phase operation state, and when the circuit breaker is judged to be in the non-full-phase operation state, the circuit breaker is tripped through delayed action. Specifically, the method comprises the following steps:
the relay type non-full-phase protection module comprises a non-full-phase opening module, and the non-full-phase opening module is formed by combining a tripping position and a switching-on position of a circuit breaker in series-parallel connection;
the microcomputer type non-full-phase protection module comprises a logic operation module and a time delay module, the logic operation module acquires a breaker split-phase tripping position signal and a switching-on position signal and is connected with an output end of the non-full-phase switching-on module, non-full-phase logic operation is carried out based on the breaker split-phase tripping position signal, the switching-on position signal and a non-full-phase switching-on signal (namely, the non-full-phase switching-on state is '1') output by the relay type non-full-phase protection module, whether the breaker is in a non-full-phase running state or not is judged, and when the breaker is judged to be in the non-full-phase running state, tripping is carried out after the time delay setting time of the time delay module.
In a specific implementation of the embodiment of the present invention, as shown in fig. 1, the non-full-phase open module includes a three-phase trip position contact and a three-phase closing position contact;
the three-phase tripping position joint is formed by connecting a breaker A-phase tripping position joint TWJ-A, B-phase tripping position joint TWJ-B, C-phase tripping position joint TWJ-C in parallel;
the three-phase switching-on position contact is formed by connecting a breaker A phase switching-on position contact HWJ-A, B phase switching-on position contact HWJ-B, C phase switching-on position contact HWJ-C in parallel;
and the three-phase tripping position contact and the three-phase switching-on position contact are connected in series to obtain non-full-phase switching-in.
The non-full-phase logic operation comprises circuit breaker non-full-phase state discrimination logic and circuit breaker position contact abnormity discrimination logic;
the circuit breaker position contact abnormity judging logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the trip position contact TWJ _ A and the closing position contact HWJ _ A of the A phase of the circuit breaker are both '1' or both '0';
the trip position contact TWJ _ B and the closing position contact HWJ _ B of the phase B of the circuit breaker are both '1' or both '0';
thirdly, both a C-phase tripping position contact TWJ _ C and a switching-on position contact HWJ _ C of the circuit breaker are 1 or 0;
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as '1';
any phase switching-on position of the A phase, the B phase and the C phase of the circuit breaker is '1';
and thirdly, the position of the circuit breaker is not abnormal.
Example 4
The invention provides a non-full-phase protection method, which comprises the following steps:
when a non-full-phase open-in module in a relay type non-full-phase protection module outputs a non-full-phase action signal, a time relay is triggered to start timing, and the action signal is output after a first set value is delayed; the non-full-phase opening module is formed by combining a tripping position of a circuit breaker and a switching-on position in series and parallel;
carrying out non-full-phase logic operation on the basis of the circuit breaker split-phase tripping position signal and the switching-on position signal by utilizing a logic operation module in the microcomputer type non-full-phase protection module; when the logic operation module judges that the circuit breaker is in a non-full-phase operation state, the delay module delays a second set value and then outputs an action signal;
and when the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module both output action signals, tripping the relay.
In a specific implementation of the embodiment of the present invention, as shown in fig. 1, the non-full-phase open module includes a three-phase trip position contact and a three-phase closing position contact;
the three-phase tripping position joint is formed by connecting a breaker A-phase tripping position joint TWJ-A, B-phase tripping position joint TWJ-B, C-phase tripping position joint TWJ-C in parallel;
the three-phase switching-on position contact is formed by connecting a breaker A phase switching-on position contact HWJ-A, B phase switching-on position contact HWJ-B, C phase switching-on position contact HWJ-C in parallel;
and the three-phase tripping position contact and the three-phase closing position contact are connected in series to obtain non-full-phase opening.
The non-full-phase logic operation comprises circuit breaker non-full-phase state discrimination logic and circuit breaker position contact abnormity discrimination logic;
the circuit breaker position contact abnormity judging logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the trip position contact TWJ _ A and the closing position contact HWJ _ A of the A phase of the circuit breaker are both '1' or both '0';
the trip position contact TWJ _ B and the closing position contact HWJ _ B of the phase B of the circuit breaker are both '1' or both '0';
thirdly, both a C-phase tripping position contact TWJ _ C and a switching-on position contact HWJ _ C of the circuit breaker are '1' or '0';
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as 1;
any phase switching-on position of the A phase, the B phase and the C phase of the circuit breaker is '1';
and thirdly, the position of the circuit breaker is not abnormal.
The method in the embodiment of the present invention can be implemented based on the system in embodiment 1.
Example 5
Based on embodiment 4, the embodiment of the present invention is different from embodiment 4 in that the method further includes: and the action signals output by the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module are sent to the logic and module, and after the operation of the logic and module, the signals for tripping the relay are output.
The method in the embodiment of the present invention can be implemented based on the system in embodiment 2.
Example 6
The invention provides a non-full-phase protection method, which comprises the following steps:
outputting a non-full-phase open-in signal by using a non-full-phase open-in module in a relay type non-full-phase protection module, wherein the non-full-phase open-in module is formed by combining a tripping position of a circuit breaker and a switching-on position in series-parallel connection;
and when the circuit breaker is judged to be in the non-full-phase running state, the circuit breaker is delayed for a set time through the delay module and then is tripped.
In a specific implementation of the embodiment of the present invention, as shown in fig. 1, the non-full-phase open module includes a three-phase trip position contact and a three-phase closing position contact;
the three-phase tripping position joint is formed by connecting a breaker A-phase tripping position joint TWJ-A, B-phase tripping position joint TWJ-B, C-phase tripping position joint TWJ-C in parallel;
the three-phase switching-on position contact is formed by connecting a breaker A phase switching-on position contact HWJ-A, B phase switching-on position contact HWJ-B, C phase switching-on position contact HWJ-C in parallel;
and the three-phase tripping position contact and the three-phase switching-on position contact are connected in series to obtain non-full-phase switching-in.
The non-full-phase logic operation comprises a circuit breaker non-full-phase state judgment logic and a circuit breaker position contact abnormity judgment logic;
the circuit breaker position contact abnormity discrimination logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the trip position contact TWJ _ A and the closing position contact HWJ _ A of the A phase of the circuit breaker are both '1' or both '0';
the trip position contact TWJ _ B and the closing position contact HWJ _ B of the phase B of the circuit breaker are both '1' or both '0';
thirdly, both a C-phase tripping position contact TWJ _ C and a switching-on position contact HWJ _ C of the circuit breaker are '1' or '0';
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as '1';
the closing position of any phase of the A phase, the B phase and the C phase of the breaker is 1;
and thirdly, the position of the circuit breaker is not abnormal.
The method in the embodiment of the present invention can be implemented based on the system in embodiment 3.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (11)
1. A non-full phase protection system, comprising: a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module;
the relay type non-full-phase protection module comprises a non-full-phase open-in module and a time relay which are connected in series; the non-full-phase opening module is formed by combining a tripping position of a circuit breaker and a switching-on position in series and parallel; when the non-full-phase opening module outputs a non-full-phase action signal, the time relay starts timing, and the action signal is output after the first set value is delayed;
the microcomputer type non-full-phase protection module comprises a logic operation module and a delay module which are connected; the logic operation module carries out non-full-phase logic operation based on the circuit breaker split-phase tripping position signal and the switching-on position signal; when the logic operation module judges that the circuit breaker is in a non-full-phase operation state, the delay module delays a second set value and then outputs an action signal;
the relay type non-full-phase protection module is connected with the output end of the microcomputer type non-full-phase protection module in series, and when the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module both output action signals, the relay is tripped.
2. A non-full phase protection system according to claim 1, wherein: the microcomputer type non-full-phase protection module further comprises a logic and module, the input of the logic and module is respectively connected with the time relay and the logic operation module, and the output end of the logic and module is used for being connected with the relay and tripping the relay.
3. A non-full phase protection system according to claim 1, wherein: the non-full-phase switching-on module comprises a three-phase tripping position contact and a three-phase switching-off position contact;
the three-phase tripping position contact is formed by connecting a phase A tripping position contact, a phase B tripping position contact and a phase C tripping position contact of the circuit breaker in parallel;
the three-phase switching-on position contact is formed by connecting a circuit breaker A-phase switching-on position contact, a breaker B-phase switching-on position contact and a breaker C-phase switching-on position contact in parallel;
the three-phase tripping position contact is connected with the three-phase closing position contact in series.
4. A non-full phase protection system according to claim 1, wherein: the non-full-phase logic operation comprises circuit breaker position contact abnormity judging logic and circuit breaker non-full-phase state judging logic;
the circuit breaker position contact abnormity judging logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the tripping position contact and the closing position contact of the A phase of the circuit breaker are both '1' or '0';
the trip position contact and the closing position contact of the B phase of the circuit breaker are both '1' or '0';
thirdly, the C-phase tripping position contact and the closing position contact of the circuit breaker are both '1' or '0';
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as '1';
any phase switching-on position of the A phase, the B phase and the C phase of the circuit breaker is '1';
and thirdly, the position of the circuit breaker is not abnormal.
5. A non-full phase protection system according to claim 1, wherein: the first set value is equal to the second set value.
6. A non-full phase protection system, characterized by: the system comprises a relay type non-full-phase protection module and a microcomputer type non-full-phase protection module;
the relay type non-full-phase protection module comprises a non-full-phase opening module, and the non-full-phase opening module is formed by combining a tripping position and a switching-on position of a circuit breaker in series-parallel connection;
the microcomputer type non-full-phase protection module comprises a logic operation module and a time delay module, the logic operation module collects a breaker split-phase tripping position signal and a switching-on position signal and is connected with an output end of the non-full-phase switching-on module, non-full-phase logic operation is carried out on the basis of the breaker split-phase tripping position signal, the switching-on position signal and a non-full-phase switching-on signal output by the relay type non-full-phase protection module, whether the breaker is in a non-full-phase running state or not is judged, and when the breaker is judged to be in the non-full-phase running state, the breaker is tripped by action after time delay of the time delay module is set.
7. A non-full-phase protection system according to claim 6, wherein: the non-full-phase switching-on module comprises a three-phase tripping position contact and a three-phase switching-off position contact;
the three-phase tripping position contact is formed by connecting a phase A tripping position contact, a phase B tripping position contact and a phase C tripping position contact of the circuit breaker in parallel;
the three-phase switching-on position contact is formed by connecting a circuit breaker A phase switching-on position contact, a breaker B phase switching-on position contact and a breaker C phase switching-on position contact in parallel;
the three-phase trip position contacts are in series with the three-phase on position contacts.
8. A non-full-phase protection system according to claim 6, wherein: the non-full-phase logic operation comprises circuit breaker position contact abnormity judging logic and circuit breaker non-full-phase state judging logic;
the circuit breaker position contact abnormity judging logic is as follows: any one of the following conditions is satisfied, and after alarm delay, it is determined that the position of the circuit breaker is abnormal:
the tripping position contact and the closing position contact of the A phase of the circuit breaker are both '1' or '0';
the trip position contact and the closing position contact of the B phase of the circuit breaker are both '1' or '0';
thirdly, the C-phase tripping position contact and the closing position contact of the circuit breaker are both '1' or '0';
the non-full-phase state discrimination logic of the circuit breaker is as follows: and if all the following conditions are met, judging that the circuit breaker is in a non-full-phase operation state:
setting the tripping position of any phase of A phase, B phase and C phase of the circuit breaker as '1';
any phase switching-on position of the A phase, the B phase and the C phase of the circuit breaker is '1';
and thirdly, the position of the circuit breaker is not abnormal.
9. A non-full phase protection method, comprising:
when a non-full-phase opening module in a relay type non-full-phase protection module outputs a non-full-phase action signal, a time relay is triggered to start timing, and the action signal is output after a first set value is delayed; the non-full-phase opening module is formed by combining a tripping position of a circuit breaker and a switching-on position in series and parallel;
carrying out non-full-phase logic operation on the basis of the circuit breaker split-phase tripping position signal and the switching-on position signal by utilizing a logic operation module in the microcomputer type non-full-phase protection module; when the logic operation module judges that the circuit breaker is in a non-full-phase operation state, the delay module delays a second set value and then outputs an action signal;
and when the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module both output action signals, tripping the relay.
10. A non-full-phase protection method according to claim 9, characterized by: the method further comprises the following steps:
and the action signals output by the relay type non-full-phase protection module and the microcomputer type non-full-phase protection module are sent to the logic and module, and after the operation of the logic and module, the signals for tripping the relay are output.
11. A non-full phase protection method, comprising:
outputting a non-full-phase open-in signal by using a non-full-phase open-in module in a relay type non-full-phase protection module, wherein the non-full-phase open-in module is formed by combining a tripping position of a circuit breaker and a switching-on position in series-parallel connection;
and when the circuit breaker is judged to be in the non-full-phase running state, the circuit breaker is delayed for a set time through the delay module and then is tripped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210150732.3A CN114665449A (en) | 2022-02-18 | 2022-02-18 | Non-full-phase protection system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210150732.3A CN114665449A (en) | 2022-02-18 | 2022-02-18 | Non-full-phase protection system and method |
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| CN202210150732.3A Pending CN114665449A (en) | 2022-02-18 | 2022-02-18 | Non-full-phase protection system and method |
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| Country | Link |
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