CN113702822A - Simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment - Google Patents
Simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment Download PDFInfo
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- CN113702822A CN113702822A CN202111067294.6A CN202111067294A CN113702822A CN 113702822 A CN113702822 A CN 113702822A CN 202111067294 A CN202111067294 A CN 202111067294A CN 113702822 A CN113702822 A CN 113702822A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
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Abstract
The invention provides a simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment, which comprises a shell, wherein a tripping and closing key is arranged outside the shell, and a main circuit board is integrated inside the shell; the main circuit board is provided with a positive voltage end, a negative voltage end, a manual switching-on control circuit, a manual tripping control circuit and three split-phase switching-on and switching-off control circuits which are connected with an external direct-current power supply; the manual tripping and closing control circuits are all electrically connected or disconnected when the keys are pressed down for a single time or two times; each split-phase tripping and closing control circuit forms a closing output branch, a tripping output branch, a closing delay starting branch, a tripping delay starting branch, a closing display branch and a tripping display branch, and can carry out on-site verification of tripping and closing according to tripping and closing key conditions. The invention can solve the defects of the mode that the existing tripping and closing functional devices are concentrated in the whole screen, and has the advantages of low price, convenient carrying, simple operation and the like.
Description
Technical Field
The invention relates to the technical field of relay protection detection, in particular to a simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment.
Background
At present, functional devices required by a tripping and closing test in a power grid relay protection laboratory are concentrated in an integral screen, so that if the functional devices are mounted too much, congestion is easily caused, and particularly, under the condition that wiring formed when the functional devices need to be matched with external wiring through terminals is not tight. Therefore, the existing tripping and closing functional devices are integrated in an integral screen, and once a certain tripping and closing functional device has a defect in operation, the whole tripping and closing functional device needs to be stopped for subsequent processing.
In addition, the conventional tripping and closing functional device is centralized in an integral screen, and centralized screen assembly can be realized only by multi-interval customization, so that the device is high in price and inconvenient to carry. Meanwhile, when the existing tripping and closing functional device is centralized in an integral screen, multiple persons are required to cooperate to operate when the existing tripping and closing functional device is used for testing or competition examinations, and operation errors are easily caused.
Therefore, a simulated circuit breaker device for tripping and closing tests is needed, which can overcome the above disadvantages of the conventional tripping and closing functional device in a mode of concentrating inside a whole screen, and has the advantages of low price, convenience in carrying, simplicity in operation and the like.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment, which can overcome the defects of the existing mode that tripping and closing function devices are concentrated in an integral screen and has the advantages of low price, convenience in carrying, simplicity in operation and the like.
In order to solve the technical problem, an embodiment of the invention provides a simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment, which is matched with the relay protection equipment and comprises a shell; a closing key and a tripping key are arranged on the shell, and a main circuit board is integrally installed in the shell;
the switching-on key and the tripping key both extend into the shell to be matched with the main circuit board, and both the switching-on key and the tripping key are conductive silica gel keys which can be repeatedly operated to realize single-time pressing connection with the main circuit board and secondary pressing reset and are separated from the main circuit board;
a positive voltage end and a negative voltage end which are respectively correspondingly connected with the positive electrode and the negative electrode of an external direct current power supply are formed on the main circuit board, and a manual switching-on control circuit, a manual tripping control circuit and three split-phase tripping and switching-on control circuits are also formed;
the manual switching-on control circuit on the main circuit board comprises two first touch ends which are arranged at intervals and have conductive performance; a first touch control end is connected to a positive voltage end of the main circuit board, and the other first touch control end is connected to a manual switching-on input circuit preset on the relay protection device; the two first touch ends are electrically connected when the closing key is pressed down once and electrically disconnected when the closing key is pressed down twice;
the manual tripping control circuit on the main circuit board comprises two second touch terminals which are arranged at intervals and have conductive performance; a second touch terminal is connected to the positive voltage terminal of the main circuit board, and the other second touch terminal is connected to a manual tripping input circuit preset on the relay protection device; the two second touch terminals are electrically conducted when the trip button is pressed down for a single time, and are electrically disconnected when the trip button is pressed down for a second time;
each split-phase tripping and closing control circuit on the main circuit board comprises two magnetic latching relays, a closing time relay, a tripping time relay and two indicating lamps which are arranged correspondingly to each other; the two magnetic latching relays respectively comprise a normally open contact and a reset coil for controlling the resetting of the magnetic latching relay of the other side; the closing time relay and the tripping time relay both comprise a normally open contact and a normally closed contact with a certain time delay function;
in each split-phase tripping and closing control circuit, a closing output branch is formed by a normally closed contact of a closing time relay and a corresponding excitation end and reset coil of one magnetic latching relay, a tripping output branch is formed by a normally closed contact of a tripping time relay and a corresponding excitation end and reset coil of the other magnetic latching relay, and the excitation end of the closing time relay is connected in series with the corresponding normally open contact of one magnetic latching relay to form a closing delay starting branch circuit, the excitation end of the trip time relay is connected in series with the corresponding normally open contact of the other magnetic latching relay to form a trip delay starting branch circuit, the normally open contact of each closing time relay is connected with a corresponding indicating lamp string to form a closing display branch circuit, and the normally open contact of each tripping time relay is connected with another corresponding indicating lamp string to form a tripping display branch circuit;
in each split-phase tripping and closing control circuit, one end of a closing output branch is connected into a corresponding split-phase closing output circuit preset on the relay protection equipment, and the other end of the closing output branch is connected into a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a tripping output branch circuit is connected into a corresponding phase tripping output circuit preset on the relay protection equipment, and the other end of the tripping output branch circuit is connected into a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a closing delay starting branch circuit is connected to a positive voltage end of the main circuit board, and the other end of the closing delay starting branch circuit is connected to a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a tripping delay starting branch circuit is connected to a positive voltage end of the main circuit board, and the other end of the tripping delay starting branch circuit is connected to a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a closing display branch circuit is connected to the positive voltage end of the main circuit board, and the other end of the closing display branch circuit is connected to the negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a tripping display branch is connected to the positive voltage end of the main circuit board, and the other end of the tripping display branch is connected to the negative voltage end of the main circuit board.
When the closing button is pressed down once, the magnetic latching relay of the closing output branch in each split-phase tripping and closing control circuit is excited, so that the magnetic latching relay of the corresponding tripping output branch is demagnetized, the closing delay starting branch in each split-phase tripping and closing control circuit is conducted with the positive and negative voltage ends of the main circuit board, the corresponding tripping delay starting branch is disconnected with the positive and negative voltage ends of the main circuit board, the indicator lamp of the closing display branch in each split-phase tripping and closing control circuit is turned on, the indicator lamp of the corresponding tripping display branch is turned off, and the normal on-site closing test is determined.
When the closing button is pressed down for the second time, the magnetic latching relay of the closing output branch in each split-phase tripping and closing control circuit is demagnetized, the magnetic latching relay of the corresponding tripping output branch continues to be demagnetized, the closing delay starting branch and the corresponding tripping delay starting branch in each split-phase tripping and closing control circuit are disconnected with the positive and negative voltage ends of the main circuit board, and the closing display branch and the indicating lamp of the corresponding tripping display branch in each split-phase tripping and closing control circuit are turned off to determine that the on-site closing reset test is normal.
When the tripping button is pressed down once, the magnetic latching relay of the tripping output branch in each split-phase tripping and closing control circuit is excited, so that the magnetic latching relay of the corresponding closing output branch is demagnetized, the tripping delay starting branch in each split-phase tripping and closing control circuit is conducted with the positive and negative voltage ends of the main circuit board, the corresponding closing delay starting branch is disconnected with the positive and negative voltage ends of the main circuit board, and the fact that the indicator lamp of the tripping display branch in each split-phase tripping and closing control circuit is turned on and the indicator lamp of the corresponding closing display branch is turned off is achieved, so that the fact that a local tripping test is normal is determined.
When the tripping button is pressed down for the second time, the magnetic latching relay of the tripping output branch in each split-phase tripping and closing control circuit is demagnetized, the magnetic latching relay of the corresponding closing output branch continues to be demagnetized, and the tripping delay starting branch and the corresponding closing delay starting branch in each split-phase tripping and closing control circuit are disconnected with the positive and negative voltage ends of the main circuit board, so that the indicating lamps of the tripping display branch and the corresponding closing display branch in each split-phase tripping and closing control circuit are extinguished, and the normal tripping reset test in place is determined.
And the colors of the lights displayed by the two indicating lamps are different.
The switching-on key comprises a first connecting sheet with conductive performance and a first touch point which is fixed in the middle of the first connecting sheet and is in a protruding structure shape; wherein the content of the first and second substances,
the first connecting piece is positioned in the shell and is arranged towards the main circuit board;
a first insulator is arranged at one end of the first touch point, which is far away from the first connecting sheet, and the first insulator penetrates through the shell and is positioned outside the shell;
when the first touch point is pressed down once, two ends of the first connecting sheet are driven to respectively abut against two first touch ends in the manual closing control circuit, so that the manual closing control circuit is conducted with a manual closing input circuit preset on the relay protection device; or when the first touch point is pressed down for the second time, the two ends of the first connecting sheet are driven to be separated from the two first touch ends in the manual closing control circuit respectively, so that the manual closing control circuit is disconnected from a preset manual closing input circuit on the relay protection device.
The tripping button comprises a second connecting sheet with conductive performance and a second touch point which is fixed at the middle position of the second connecting sheet and is in a protruding structure shape; wherein the content of the first and second substances,
the second connecting piece is positioned in the shell and arranged towards the main circuit board;
a second insulator is arranged at one end, far away from the second connecting sheet, of the second touch point, and penetrates through the shell and is positioned outside the shell;
when the second touch point is pressed down once, two ends of the second connecting sheet are driven to be respectively abutted against two second touch ends in the manual tripping control circuit, so that the manual tripping control circuit is conducted with a manual tripping input circuit preset on the relay protection device; or when the second touch point is pressed down for the second time, the two ends of the second connecting sheet are driven to be separated from the two second touch ends in the manual tripping control circuit respectively, so that the manual tripping control circuit is disconnected from the manual tripping input circuit preset on the relay protection device.
Wherein, still include: the 1M disconnecting link rotating button and the 2M disconnecting link rotating button are arranged on the shell, and the 1M disconnecting link switching-on and switching-off control circuit and the 2M disconnecting link switching-on and switching-off control circuit are integrated on the main circuit board; wherein the content of the first and second substances,
the 1M disconnecting link rotating button and the 2M disconnecting link rotating button both extend into the shell to be matched with the main circuit board, and third connecting pieces capable of performing reciprocating rotation operation are formed in the shell; one end of each third connecting sheet is fixed, and the other end of each third connecting sheet can rotate along the fixed end and change between two preset position points;
the 1M disconnecting link switching-on and switching-off control circuit and the 2M disconnecting link switching-on and switching-off control circuit are both control circuits with single-pole double-throw functions, single-pole fixed points of the two control circuits are both connected to a positive voltage end of the main circuit board and are abutted against a fixed end of a third connecting sheet arranged on a corresponding disconnecting link rotating button, and double-throw points of the two control circuits are both connected to a disconnecting link switching circuit preset on the relay protection device and are both two position points which are rotationally abutted against the third connecting sheet arranged on the corresponding disconnecting link rotating button; one of the double throwing points realizes switching-on control, and the other realizes switching-off control;
when the 1M disconnecting link rotating button is rotated leftwards to be conducted between the 1M disconnecting link switching-on and switching-off control circuit and a disconnecting link switching circuit preset on the relay protection device, 1M disconnecting link switching-on control is achieved; or when the 1M disconnecting link rotating button is rightwards rotated to the 1M disconnecting link switching-on and switching-off control circuit and the disconnecting link switching circuit preset on the relay protection equipment to be conducted, 1M disconnecting link switching-off control is achieved;
when the 2M disconnecting link rotating button is rotated leftwards and the 2M disconnecting link switching-on and switching-off control circuit is conducted with a disconnecting link switching circuit preset on the relay protection device, 2M disconnecting link switching-on control is achieved; or when the 2M disconnecting link rotating button is rotated rightwards to the 2M disconnecting link switching-on and switching-off control circuit and the disconnecting link switching circuit preset on the relay protection equipment are switched on, 2M disconnecting link switching-off control is achieved.
The embodiment of the invention has the following beneficial effects:
compared with the traditional simulated circuit breaker device for the tripping and closing test of the power grid relay protection equipment, the simulated circuit breaker device for the tripping and closing test of the power grid relay protection equipment is simply connected and matched with the relay protection equipment, and the automatic tripping and closing function simulation and test can be realized by manually pressing down a closing key or a tripping key, so that the defects of the mode that the existing tripping and closing function devices are concentrated inside an integral screen can be overcome, and the simulated circuit breaker device has the advantages of low price, convenience in carrying, simplicity in operation and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a front view of a housing in a simulated circuit breaker device for tripping and closing tests of a power grid relay protection device according to an embodiment of the present invention;
fig. 2 is a block diagram of an internal logic structure of a main circuit board in a simulated circuit breaker device for tripping and closing tests of a power grid relay protection device, provided by an embodiment of the present invention;
fig. 3 is a logic structure block diagram of the main circuit board in fig. 2 when the main circuit board includes a B-phase tripping and closing control circuit;
fig. 4 is a diagram of an application scenario in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to fig. 3, in an embodiment of the present invention, a simulated circuit breaker device for tripping and closing tests of a power grid relay protection device is provided, which is matched with the relay protection device and includes a housing; a closing button T1 and a tripping button T2 are arranged on the shell, and a main circuit board is integrally installed in the shell;
in fig. 1, both the closing button T1 and the tripping button T2 extend into the interior of the housing to cooperate with the main circuit board, and both are conductive silica gel buttons that can be repeatedly operated to realize single-time press connection with the main circuit board and secondary press reset and are separated from the main circuit board;
in fig. 2, a positive voltage terminal (such as positive DC) and a negative voltage terminal (such as negative DC) are formed on the main circuit board, and the positive terminal and the negative terminal are respectively correspondingly connected with the positive electrode and the negative electrode of the external DC power supply DC, and a manual closing control circuit 21, a manual tripping control circuit 22 and three split-phase tripping and closing control circuits 23 are formed on the main circuit board;
in fig. 3, the manual closing control circuit 21 on the main circuit board includes two first touch terminals a1 arranged at intervals and having conductive performance; a first touch terminal a1 is connected to a positive voltage terminal (e.g., positive DC) of the main circuit board, and another first touch terminal a1 is connected to a manual switching-on input circuit (e.g., the content of the dashed box in fig. 2) preset on the relay protection device; the two first touch terminals a1 are electrically connected when the closing button in fig. 1 is pressed down once, and electrically disconnected when the closing button in fig. 1 is pressed down twice; it can be understood that if the switching-on key in fig. 1 is pressed for an odd number of times, the manual switching-on control circuit 21 is triggered to be communicated with a preset manual switching-on input circuit on the relay protection device, and if the switching-on key in fig. 1 is pressed for an even number of times, the manual switching-on control circuit 21 is triggered to be disconnected from the preset manual switching-on input circuit on the relay protection device;
the manual trip control circuit 22 on the main circuit board comprises two second touch terminals a2 which are arranged at intervals and have conductive performance; a second touch terminal a2 is connected to a positive voltage terminal (e.g., positive DC) of the main circuit board, and another second touch terminal a2 is connected to a manual trip input circuit (e.g., the content of the dashed box in fig. 2) preset on the relay protection device; the two second touch terminals a2 are electrically connected when the trip button is pressed for a single time in fig. 1, and electrically disconnected when the trip button is pressed for a second time in fig. 1; it can be understood that if the trip button in fig. 1 is pressed for an odd number of times, the manual trip control circuit 21 is triggered to connect to the manual trip input circuit preset on the relay protection device, and if the trip button in fig. 1 is pressed for an even number of times, the manual trip control circuit 21 is triggered to disconnect from the manual trip input circuit preset on the relay protection device;
each split-phase tripping and closing control circuit 23 on the main circuit board comprises two magnetic latching relays 231 and 232, a closing time relay 233, a tripping time relay 234 and two indicator lamps 235 and 236 which are arranged correspondingly; the two magnetic latching relays 231 and 232 respectively comprise normally open contacts 231-t1 and 232-t1 and a reset coil for controlling the reset of the opposite magnetic latching relay; the closing time relay 233 and the tripping time relay 234 both comprise a normally open contact 233-t1, 234-t1 and a normally closed contact 233-t2, 234-t2 with a certain delay function;
in each split-phase tripping and closing control circuit 23, a closing output branch is formed by a normally closed contact 233-t2 of a closing time relay 233, an excitation end 231-m and a reset coil of a corresponding one of the magnetic latching relays 231, a tripping output branch is formed by a normally closed contact 234-t2 of the tripping time relay 234, an excitation end and a reset coil of another corresponding one of the magnetic latching relays 232, a tripping delay starting branch is formed by serially connecting an excitation end 233-m of the closing time relay 233 and a normally open contact 231-t1 of the corresponding one of the magnetic latching relays 231, a tripping delay starting branch is formed by serially connecting an excitation end 234-m of the tripping time relay 234 and a normally open contact 232-t1 of another corresponding one of the magnetic latching relays 232, and a tripping display branch is formed by serially connecting a normally open contact 233-t1 of the closing time relay 233 and a corresponding one of the indicator lamps 235, the normally open contact 234-t1 of the trip time relay 234 and the corresponding another indicator lamp 236 are connected in series to form a trip display branch; it can be understood that the two indicator lights 235, 236 display different colors of light, for example, the indicator light 235 is a red LED light, and the indicator light 236 is a green LED light;
in each split-phase tripping and closing control circuit 23, one end of a closing output branch is connected to a corresponding split-phase closing output circuit (as shown in the content of a dotted frame in fig. 2) preset on the relay protection device, and the other end of the closing output branch is connected to a negative voltage end (as negative DC) of the main circuit board; in each split-phase tripping and closing control circuit 23, one end of a tripping output branch is connected to a corresponding phase tripping output circuit (such as the content of a dashed frame in fig. 2) preset on the relay protection device, and the other end of the tripping output branch is connected to a negative voltage end (such as negative DC) of the main circuit board; in each split-phase tripping and closing control circuit 23, one end of the closing delay starting branch is connected to a positive voltage end (such as positive DC) of the main circuit board, and the other end of the closing delay starting branch is connected to a negative voltage end (such as negative DC) of the main circuit board; in each split-phase tripping and closing control circuit 23, one end of a tripping delay starting branch is connected to a positive voltage end (such as positive DC) of the main circuit board, and the other end of the tripping delay starting branch is connected to a negative voltage end (such as negative DC) of the main circuit board; in each split-phase tripping and closing control circuit 23, one end of a closing display branch is connected to a positive voltage end (such as positive DC) of the main circuit board, and the other end of the closing display branch is connected to a negative voltage end (such as negative DC) of the main circuit board; in each of the split-phase tripping and closing control circuits 23, one end of each of the tripping display branches is connected to a positive voltage terminal (e.g., positive DC) of the main circuit board, and the other end of each of the tripping display branches is connected to a negative voltage terminal (e.g., negative DC) of the main circuit board.
In the embodiment of the invention, under the condition that the wiring of the simulated circuit breaker device for the tripping and closing test of the power grid relay protection equipment and the relay protection equipment is normal, the on-site tripping test can be realized, and the method specifically comprises the following steps:
(1) if the closing button in fig. 1 is pressed down once, the magnetic latching relay 231 of the closing output branch in each split-phase tripping and closing control circuit 23 is excited, so that the magnetic latching relay 232 corresponding to the tripping output branch is demagnetized, and the closing delay starting branch in each split-phase tripping and closing control circuit 23 is conducted with the positive and negative voltage ends (such as positive and negative DC) of the main circuit board and the corresponding tripping delay starting branch is disconnected with the positive and negative voltage ends (such as positive and negative DC) of the main circuit board, so that the indicator lamp 235 of the closing display branch in each split-phase tripping and closing control circuit 23 is turned on and the indicator lamp 236 of the corresponding tripping display branch is turned off, thereby determining that the on-site closing test is normal.
(2) If the closing button in fig. 1 is pressed down for the second time, the magnetic latching relay 231 of the closing output branch in each split-phase tripping and closing control circuit 23 is demagnetized, and the magnetic latching relay 232 of the corresponding tripping output branch continues to be demagnetized, and the closing delay starting branch and the corresponding tripping delay starting branch in each split-phase tripping and closing control circuit 23 are both disconnected from the positive and negative voltage ends (such as positive and negative DC) of the main circuit board, so that the indicator lamps 235 and 236 of the closing display branch and the corresponding tripping display branch in each split-phase tripping and closing control circuit 23 are both turned off, and it is determined that the on-site closing reset test is normal.
(3) Similarly, when the trip button is pressed down once in fig. 1, the magnetic latching relay 232 of the trip output branch in each split-phase tripping and closing control circuit 23 is excited, so that the magnetic latching relay 231 of the corresponding closing output branch is demagnetized, and the trip delay starting branch in each split-phase tripping and closing control circuit 23 is conducted with the positive and negative voltage ends (such as positive and negative DC) of the main circuit board and the corresponding closing delay starting branch is disconnected with the positive and negative voltage ends (such as positive and negative DC) of the main circuit board, thereby realizing that the indicator lamp 236 of the trip display branch in each split-phase tripping and closing control circuit 23 is turned on and the indicator lamp 235 of the corresponding trip display branch is turned off, so as to determine that the local trip test is normal.
(4) Similarly, if the trip button is pressed down for the second time in fig. 1, the magnetic latching relay 232 of the trip output branch in each split-phase trip and close control circuit 23 is de-energized, and the magnetic latching relay 231 of the corresponding close output branch continues to be de-energized, and the trip delay starting branch and the corresponding close delay starting branch in each split-phase trip and close control circuit 23 are both disconnected from the positive and negative voltage ends (such as positive and negative DC) of the main circuit board, so that the indicator lamps 235 and 236 of the trip display branch and the corresponding close display branch in each split-phase trip and close control circuit 23 are both turned off, thereby determining that the local trip reset test is normal.
It should be noted that the single-phase test or the two-phase and above simultaneous tests can be realized according to the connection condition of the three split-phase tripping and closing control circuits 23 and the relay device.
Therefore, after the simulated circuit breaker device for the tripping and closing test of the power grid relay protection equipment in the embodiment of the invention is simply connected and matched with the relay protection equipment, the tripping and closing function can be automatically simulated and tested by manually pressing a switching key or a tripping key, the defects of the mode that the conventional tripping and closing function device is concentrated in an integral screen can be overcome, and the simulated circuit breaker device has the advantages of low price, convenience in carrying, simplicity in operation and the like.
In the embodiment of the present invention, the closing button and the tripping button in fig. 1 may be specifically designed.
For example, the closing key comprises a first connecting sheet with conductive performance and a first touch point which is fixed at the middle position of the first connecting sheet and is in a protruding structure shape; the first connecting sheet is positioned in the shell and is arranged towards the main circuit board; a first insulator is arranged at one end of the first touch point, which is far away from the first connecting sheet, and the first insulator penetrates through the shell and is positioned outside the shell; it should be noted that the manual key is implemented by depressing the first insulator.
When the first touch point is pressed down once, two ends of the first connecting piece are driven to respectively abut against two first touch ends a1 in the manual closing control circuit 21 in fig. 2, so as to realize conduction between the manual closing control circuit 21 and a manual closing input circuit (such as the content of a dashed frame in fig. 2) preset on the relay protection device; or when the first touch point is pressed down for the second time, the two ends of the first connecting piece are driven to be separated from the two first touch ends a1 in the manual closing control circuit 21, so as to disconnect the manual closing control circuit 21 from a manual closing input circuit (as shown in the content of the dashed frame in fig. 2) preset on the relay protection device.
For another example, the trip button comprises a second connecting sheet with conductive performance and a second touch point which is fixed at the middle position of the second connecting sheet and is in a protruding structure shape; the second connecting sheet is positioned in the shell and arranged towards the main circuit board; a second insulator is arranged at one end of the second touch point, which is far away from the second connecting sheet, and the second insulator penetrates through the shell and is positioned outside the shell; it should be noted that the manual key is implemented by pressing down the second insulator.
When the second touch point is pressed down once, two ends of the second connecting piece are driven to respectively abut against two second touch ends a2 in the manual trip control circuit 22, so as to realize conduction between the manual trip control circuit 22 and a manual trip input circuit (as the content of a dashed box in fig. 2) preset on the relay protection device; or when the second touch point is pressed down for the second time, the two ends of the second connecting piece are driven to be separated from the two second touch terminals a2 in the manual trip control circuit 22, so as to realize the disconnection between the manual trip control circuit 22 and the manual trip input circuit (as the content of the dashed box in fig. 2) preset on the relay protection device.
In the embodiment of the present invention, fig. 1 also shows a 1M disconnecting link rotating button T3 and a 2M disconnecting link rotating button T4 on the housing for identifying the bus-bar attachment condition, and meanwhile, a switching-off and switching-on control circuit cooperating with the 1M disconnecting link rotating button T3 and the 2M disconnecting link rotating button T4 needs to be designed on the main circuit board. At this time, the 1M knife switch rotary button T3 and the 2M knife switch rotary button T4 may be specifically designed.
For example, the 1M disconnecting link rotating button T3 and the 2M disconnecting link rotating button T4 are both disposed on the housing, and the main circuit board is provided with a 1M disconnecting link switching control circuit cooperating with the 1M disconnecting link rotating button T3 and a 2M disconnecting link switching control circuit cooperating with the 2M disconnecting link rotating button T4;
in fig. 1, the 1M knife switch rotary button T3 and the 2M knife switch rotary button T4 both extend into the housing to cooperate with the main circuit board, and both have third connecting pieces formed inside the housing for reciprocating rotation; one end of each third connecting sheet is fixed, and the other end of each third connecting sheet can rotate along the fixed end and change between two preset position points;
in fig. 2, the 1M knife switch on/off control circuit 24 and the 2M knife switch on/off control circuit 25 are both control circuits having single-pole double-throw function, and the single-pole fixed points c1 and d1 of the two are both connected to the positive voltage end (e.g., positive DC) of the main circuit board and are pressed against the fixed end of the third connecting piece position provided by the corresponding knife switch rotating button, and the double-throw points c2 and c3, d2 and d3 of the two are both connected to the knife switch switching circuit (e.g., the content of the dotted frame in fig. 2) preset on the relay protection device and are both two position points where the third connecting piece provided by the corresponding knife switch rotating button is rotated and pressed against; one of the double throwing points realizes switching-on control, and the other realizes switching-off control;
in fig. 2, when the 1M disconnecting link rotating button is left-handed to the connection between the 1M disconnecting link switching control circuit 24 and a disconnecting link switching circuit (as shown by the content of the dashed frame in fig. 2) preset on the relay protection device, 1M disconnecting link switching control is realized; or when the 1M disconnecting link rotating button is rotated rightwards to conduct between the 1M disconnecting link switching-on and switching-off control circuit 24 and a disconnecting link switching circuit preset on the relay protection equipment, the 1M disconnecting link switching-off control is realized;
in fig. 2, when the 2M disconnecting link rotating button is rotated left to conduct between the 2M disconnecting link switching control circuit 25 and a disconnecting link switching circuit (as the content of the dashed frame in fig. 2) preset on the relay protection device, 2M disconnecting link switching control is realized; or when the 2M disconnecting link rotating button is turned right to be conducted between the 2M disconnecting link switching-on and switching-off control circuit 25 and a disconnecting link switching circuit preset on the relay protection device, 2M disconnecting link switching-off control is achieved.
As shown in fig. 4, taking a single phase (e.g. phase B based on fig. 3) as an example, an internal logic operation principle of a main circuit board in an analog circuit breaker device for tripping and closing tests of a power grid relay protection device in an embodiment of the present invention is described, specifically as follows:
the tripping and closing test device comprises a closing key, a tripping key, a 1M disconnecting link and closing switch, a 2M disconnecting link and closing switch, a normally closed contact T1-2 and a normally open contact T1-1 which can be subjected to delayed disconnection by a closing delay relay T1, a tripping time relay T2, a normally closed contact T2-2 and a normally open contact T2-1 which can be subjected to delayed disconnection, a reset coil T-R with a magnetic-protection closing relay H and a normally open contact H-1 and correspondingly reset the magnetic-protection closing relay T, a reset coil H-R with a magnetic-protection tripping relay T and a normally open contact T-1 and correspondingly reset the magnetic-protection tripping relay H, a HD red lamp of a closing circuit indicator lamp, an LD green lamp of a tripping circuit indicator lamp, closing circuit resistors 1R, 3R, 5R, and tripping resistors 2R, 4R and 6R. It should be noted that the relay H with magnetic latching and the reset coil T-R are integrated into a linkage, and similarly, the relay T with magnetic latching and the reset coil H-R are also integrated into a linkage.
When the closing key is manually pressed, a command enters the phase splitting operation logic processing of the relay protection device through the closing key and then is output, and the normally closed contact t1-2 of the closing delay relay t1, the closing circuit resistor 3R and the excitation end of the magnetic latching relay H are instructed to be conducted, so that the magnetic latching relay H is excited to act. Meanwhile, the reset coil T-R of the magnetic latching relay H is excited to reset and lose magnetism of the magnetic latching tripping relay T. At the moment, the normally open contact H-1 is closed due to the excitation action of the magnetic latching relay H, the closing delay relay t1 is excited, and the normally open contact t1-1 of the closing delay relay t1 is driven to be closed, the HD red light is lightened, and manual closing is successful. Meanwhile, the normally closed contact t1-2 of the closing delay relay t1 delays to disconnect the closing output branch so as to avoid burning out the circuit board for too long time.
Similarly, when the tripping button is manually pressed, the command enters the phase splitting operation logic processing of the relay protection device through the tripping button and then is output, and the normally closed contact T2-2 of the tripping delay relay T2, the tripping circuit resistor 4R and the excitation end of the magnetic latching relay T are instructed to be conducted, so that the magnetic latching relay T is excited to act. Meanwhile, the reset coil H-R of the magnetic latching relay T is excited to reset and lose magnetism of the magnetic latching tripping relay R. At the moment, the normally open contact T-1 is closed due to the excitation action of the magnetic latching relay T, and the tripping delay relay T2 is excited, so that the normally open contact T2-1 of the tripping delay relay T2 is driven to close the HD green lamp to be lightened, and manual tripping is successful. Meanwhile, the normally closed contact t2-2 of the tripping delay relay t2 delays to disconnect the tripping output branch so as to avoid burning out the circuit board for too long time.
The 1M disconnecting link on-off switch is used for identifying that the bus is attached to the 1M line, and the 2M disconnecting link on-off switch is used for identifying that the bus is attached to the 2M line.
The embodiment of the invention has the following beneficial effects:
compared with the traditional simulated circuit breaker device for the tripping and closing test of the power grid relay protection equipment, the simulated circuit breaker device for the tripping and closing test of the power grid relay protection equipment is simply connected and matched with the relay protection equipment, and the automatic tripping and closing function simulation and test can be realized by manually pressing down a closing key or a tripping key, so that the defects of the mode that the existing tripping and closing function devices are concentrated inside an integral screen can be overcome, and the simulated circuit breaker device has the advantages of low price, convenience in carrying, simplicity in operation and the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (9)
1. A simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment is matched with the relay protection equipment and is characterized by comprising a shell; a closing key and a tripping key are arranged on the shell, and a main circuit board is integrally installed in the shell;
the switching-on key and the tripping key both extend into the shell to be matched with the main circuit board, and both the switching-on key and the tripping key are conductive silica gel keys which can be repeatedly operated to realize single-time pressing connection with the main circuit board and secondary pressing reset and are separated from the main circuit board;
a positive voltage end and a negative voltage end which are respectively correspondingly connected with the positive electrode and the negative electrode of an external direct current power supply are formed on the main circuit board, and a manual switching-on control circuit, a manual tripping control circuit and three split-phase tripping and switching-on control circuits are also formed;
the manual switching-on control circuit on the main circuit board comprises two first touch ends which are arranged at intervals and have conductive performance; a first touch control end is connected to a positive voltage end of the main circuit board, and the other first touch control end is connected to a manual switching-on input circuit preset on the relay protection device; the two first touch ends are electrically connected when the closing key is pressed down once and electrically disconnected when the closing key is pressed down twice;
the manual tripping control circuit on the main circuit board comprises two second touch terminals which are arranged at intervals and have conductive performance; a second touch terminal is connected to the positive voltage terminal of the main circuit board, and the other second touch terminal is connected to a manual tripping input circuit preset on the relay protection device; the two second touch terminals are electrically conducted when the trip button is pressed down for a single time, and are electrically disconnected when the trip button is pressed down for a second time;
each split-phase tripping and closing control circuit on the main circuit board comprises two magnetic latching relays, a closing time relay, a tripping time relay and two indicating lamps which are arranged correspondingly to each other; the two magnetic latching relays respectively comprise a normally open contact and a reset coil for controlling the resetting of the magnetic latching relay of the other side; the closing time relay and the tripping time relay both comprise a normally open contact and a normally closed contact with a certain time delay function;
in each split-phase tripping and closing control circuit, a closing output branch is formed by a normally closed contact of a closing time relay and a corresponding excitation end and reset coil of one magnetic latching relay, a tripping output branch is formed by a normally closed contact of a tripping time relay and a corresponding excitation end and reset coil of the other magnetic latching relay, and the excitation end of the closing time relay is connected in series with the corresponding normally open contact of one magnetic latching relay to form a closing delay starting branch circuit, the excitation end of the trip time relay is connected in series with the corresponding normally open contact of the other magnetic latching relay to form a trip delay starting branch circuit, the normally open contact of each closing time relay is connected with a corresponding indicating lamp string to form a closing display branch circuit, and the normally open contact of each tripping time relay is connected with another corresponding indicating lamp string to form a tripping display branch circuit;
in each split-phase tripping and closing control circuit, one end of a closing output branch is connected into a corresponding split-phase closing output circuit preset on the relay protection equipment, and the other end of the closing output branch is connected into a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a tripping output branch circuit is connected into a corresponding phase tripping output circuit preset on the relay protection equipment, and the other end of the tripping output branch circuit is connected into a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a closing delay starting branch circuit is connected to a positive voltage end of the main circuit board, and the other end of the closing delay starting branch circuit is connected to a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a tripping delay starting branch circuit is connected to a positive voltage end of the main circuit board, and the other end of the tripping delay starting branch circuit is connected to a negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a closing display branch circuit is connected to the positive voltage end of the main circuit board, and the other end of the closing display branch circuit is connected to the negative voltage end of the main circuit board; in each split-phase tripping and closing control circuit, one end of a tripping display branch is connected to the positive voltage end of the main circuit board, and the other end of the tripping display branch is connected to the negative voltage end of the main circuit board.
2. The simulated circuit breaker apparatus for tripping and closing tests of power grid relay protection equipment as claimed in claim 1, wherein when the closing button is pressed down once, the magnetic latching relay of the closing output branch in each split-phase tripping and closing control circuit is excited, so that the magnetic latching relay of the corresponding tripping output branch is demagnetized, and the closing delay starting branch in each split-phase tripping and closing control circuit is conducted with the positive and negative voltage ends of the main circuit board and the corresponding tripping delay starting branch is disconnected with the positive and negative voltage ends of the main circuit board, thereby realizing that the indicator lamp of the closing display branch in each split-phase tripping and closing control circuit is turned on and the indicator lamp of the corresponding tripping display branch is turned off, so as to determine that the in-situ closing test is normal.
3. The simulated circuit breaker apparatus for tripping and closing tests of power grid relay protection equipment as claimed in claim 2, wherein when the closing button is pressed down for the second time, the magnetic latching relay of the closing output branch in each split-phase tripping and closing control circuit is de-energized, the magnetic latching relay of the corresponding tripping output branch is kept de-energized continuously, and the closing delay starting branch and the corresponding tripping delay starting branch in each split-phase tripping and closing control circuit are both disconnected from the positive and negative voltage terminals of the main circuit board, so that the indicator lights of the closing display branch and the corresponding tripping display branch in each split-phase tripping and closing control circuit are both turned off, thereby determining that the in-situ closing reset test is normal.
4. The analog circuit breaker device for tripping and closing tests of power grid relay protection equipment as claimed in claim 1, wherein when the trip button is pressed down once, the magnetic latching relay of the tripping output branch in each split-phase tripping and closing control circuit is excited, so that the magnetic latching relay of the corresponding closing output branch is demagnetized, and the tripping delay starting branch in each split-phase tripping and closing control circuit is conducted with the positive and negative voltage ends of the main circuit board and the corresponding closing delay starting branch is disconnected with the positive and negative voltage ends of the main circuit board, thereby realizing that the indicator lamp of the tripping display branch in each split-phase tripping and closing control circuit is turned on and the indicator lamp of the corresponding closing display branch is turned off, so as to determine that the in-situ tripping test is normal.
5. The analog circuit breaker apparatus for tripping and closing test of power grid relay protection equipment as claimed in claim 4, wherein when the tripping button is pressed down for the second time, the magnetic latching relay of the tripping output branch in each split-phase tripping and closing control circuit is de-energized and the magnetic latching relay of the corresponding closing output branch continues to be de-energized, and the tripping delay starting branch and the corresponding closing delay starting branch in each split-phase tripping and closing control circuit are both disconnected from the positive and negative voltage terminals of the main circuit board, so that the indicator lights of the tripping display branch and the corresponding closing display branch in each split-phase tripping and closing control circuit are both turned off to determine that the in-situ tripping and resetting test is normal.
6. The simulated circuit breaker device for tripping and closing tests of power grid relay protection equipment as claimed in any one of claims 1 to 5, wherein the two indicator lights are different in color.
7. The simulated circuit breaker device for tripping and closing tests of the power grid relay protection equipment as claimed in any one of claims 1 to 5, wherein the closing key comprises a first connecting sheet with conductive performance and a first touch point which is fixed at the middle position of the first connecting sheet and is in a protruding structure shape; wherein the content of the first and second substances,
the first connecting piece is positioned in the shell and is arranged towards the main circuit board;
a first insulator is arranged at one end of the first touch point, which is far away from the first connecting sheet, and the first insulator penetrates through the shell and is positioned outside the shell;
when the first touch point is pressed down once, two ends of the first connecting sheet are driven to respectively abut against two first touch ends in the manual closing control circuit, so that the manual closing control circuit is conducted with a manual closing input circuit preset on the relay protection device; or when the first touch point is pressed down for the second time, the two ends of the first connecting sheet are driven to be separated from the two first touch ends in the manual closing control circuit respectively, so that the manual closing control circuit is disconnected from a preset manual closing input circuit on the relay protection device.
8. The simulated circuit breaker device for tripping and closing tests of the power grid relay protection equipment as claimed in any one of claims 1 to 5, wherein the tripping button comprises a second connecting sheet with conductive performance and a second touch point which is fixed at the middle position of the second connecting sheet and is in a protruding structure shape; wherein the content of the first and second substances,
the second connecting piece is positioned in the shell and arranged towards the main circuit board;
a second insulator is arranged at one end, far away from the second connecting sheet, of the second touch point, and penetrates through the shell and is positioned outside the shell;
when the second touch point is pressed down once, two ends of the second connecting sheet are driven to be respectively abutted against two second touch ends in the manual tripping control circuit, so that the manual tripping control circuit is conducted with a manual tripping input circuit preset on the relay protection device; or when the second touch point is pressed down for the second time, the two ends of the second connecting sheet are driven to be separated from the two second touch ends in the manual tripping control circuit respectively, so that the manual tripping control circuit is disconnected from the manual tripping input circuit preset on the relay protection device.
9. The simulated circuit breaker device for tripping and closing tests of the power grid relay protection equipment as claimed in any one of claims 1 to 5, further comprising: the 1M disconnecting link rotating button and the 2M disconnecting link rotating button are arranged on the shell, and the 1M disconnecting link switching-on and switching-off control circuit and the 2M disconnecting link switching-on and switching-off control circuit are integrated on the main circuit board; wherein the content of the first and second substances,
the 1M disconnecting link rotating button and the 2M disconnecting link rotating button both extend into the shell to be matched with the main circuit board, and third connecting pieces capable of performing reciprocating rotation operation are formed in the shell; one end of each third connecting sheet is fixed, and the other end of each third connecting sheet can rotate along the fixed end and change between two preset position points;
the 1M disconnecting link switching-on and switching-off control circuit and the 2M disconnecting link switching-on and switching-off control circuit are both control circuits with single-pole double-throw functions, single-pole fixed points of the two control circuits are both connected to a positive voltage end of the main circuit board and are abutted against a fixed end of a third connecting sheet arranged on a corresponding disconnecting link rotating button, and double-throw points of the two control circuits are both connected to a disconnecting link switching circuit preset on the relay protection device and are both two position points which are rotationally abutted against the third connecting sheet arranged on the corresponding disconnecting link rotating button; one of the double throwing points realizes switching-on control, and the other realizes switching-off control;
when the 1M disconnecting link rotating button is rotated leftwards to be conducted between the 1M disconnecting link switching-on and switching-off control circuit and a disconnecting link switching circuit preset on the relay protection device, 1M disconnecting link switching-on control is achieved; or when the 1M disconnecting link rotating button is rightwards rotated to the 1M disconnecting link switching-on and switching-off control circuit and the disconnecting link switching circuit preset on the relay protection equipment to be conducted, 1M disconnecting link switching-off control is achieved;
when the 2M disconnecting link rotating button is rotated leftwards and the 2M disconnecting link switching-on and switching-off control circuit is conducted with a disconnecting link switching circuit preset on the relay protection device, 2M disconnecting link switching-on control is achieved; or when the 2M disconnecting link rotating button is rotated rightwards to the 2M disconnecting link switching-on and switching-off control circuit and the disconnecting link switching circuit preset on the relay protection equipment are switched on, 2M disconnecting link switching-off control is achieved.
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| CN202111067294.6A CN113702822B (en) | 2021-09-13 | 2021-09-13 | Simulated circuit breaker device for tripping and closing test of power grid relay protection equipment |
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| CN202111067294.6A CN113702822B (en) | 2021-09-13 | 2021-09-13 | Simulated circuit breaker device for tripping and closing test of power grid relay protection equipment |
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| CN113702822B (en) | 2023-06-27 |
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