CN113097023B - Circuit breaker based on integrated power supply system of transformer substation - Google Patents
Circuit breaker based on integrated power supply system of transformer substation Download PDFInfo
- Publication number
- CN113097023B CN113097023B CN202110367444.9A CN202110367444A CN113097023B CN 113097023 B CN113097023 B CN 113097023B CN 202110367444 A CN202110367444 A CN 202110367444A CN 113097023 B CN113097023 B CN 113097023B
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- energy storage
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- losing
- current
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- 238000004146 energy storage Methods 0.000 claims abstract description 54
- 230000002159 abnormal effect Effects 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims 3
- 238000000034 method Methods 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H2071/7481—Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a circuit breaker based on a transformer substation integrated power supply system, and relates to the technical field of circuit breakers. In the invention, the following components are added: the branch on which the second voltage dividing resistor is arranged is connected with a conducting diode and an energy storage module in series. An electromagnetic loop connected with the energy storage module in parallel is arranged on a branch where the second voltage dividing resistor is positioned; the electromagnetic loop is provided with a direct current electromagnetic mechanism; one end of the switch connecting rod connected with the voltage-losing contact is provided with a magnetic attraction end which is in magnetic attraction fit with the direct current electromagnetic mechanism; the other end of the switch connecting rod connected with the voltage-losing contact is provided with a normal tension mechanism connected at a fixed position. According to the invention, the energy storage drive control circuit breaking mechanism is arranged in the circuit breaker, and the contact cutting operation is carried out on the voltage-losing circuit where the voltage-losing release is positioned when the energy storage reaches the standard in a certain time by carrying out consumption energy storage on multiple abnormal currents in a certain time, so that the voltage-losing release loses the suction force on the free tripping mechanism, and the abnormal current cutting operation caused by the abnormal factors of the circuit is completed.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker based on a transformer substation integrated power system.
Background
The main contact of the breaker switch is manually or electrically switched on by an operating mechanism, and the main contact is locked at a switching-on position by a free tripping mechanism. If the circuit fails, the free tripping mechanism acts under the pushing of the related tripping device to enable the hook to be disconnected. The main contact is then rapidly broken under the action of the spring. The coil of the overcurrent release and the thermal element of the thermal release are connected in series with the main circuit, and the coil of the voltage-losing release is connected in parallel with the circuit. When the circuit is short-circuited or severely overloaded, the armature of the overcurrent release is attracted, so that the free release mechanism acts. When the circuit is overloaded, the heat generated by the thermal element of the thermal trip increases, so that the bimetallic strip bends upwards to push the free trip mechanism to act. When the circuit loses voltage, the armature of the voltage-losing release is released, and the free release mechanism is also enabled to act.
In the integrated power supply system of the transformer substation, some unstable factors exist in the power supply system circuit, so that some abnormal currents occur on the main circuit of the circuit breaker, the abnormal currents possibly cannot reach the intensity of overload currents, the overcurrent release cannot be driven to act so as to release the free release mechanism, and the unstable factors of the power supply system circuit only exist, so that the power supply system circuit can have subsequent hidden trouble when the power supply system circuit is continuously electrified.
In addition, even if overload current occurs on a main circuit of the circuit breaker, the thermal trip device is required to be magnetically attracted to complete trip by the overcurrent trip device in the future and is deformed by heating, and the circuit voltage connected with the voltage-losing trip device is possibly too large, the voltage-losing trip device has magnetic attraction to the free trip mechanism and collides with the acting force of the overcurrent trip device, so that abnormal blocking exists for the trip of the free trip mechanism.
Disclosure of Invention
The invention aims to provide a circuit breaker based on a transformer substation integrated power system, so that a voltage-losing release loses the suction force on a free release mechanism and the abnormal current cutting operation caused by line abnormal factors is completed.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a circuit breaker based on a transformer substation integrated power supply system, which comprises a main contact, wherein a free tripping mechanism is arranged on the main contact in a linkage way, the circuit breaker comprises an overcurrent tripping device, a thermal tripping device and a voltage-losing tripping device which are used for pushing the free tripping mechanism, and a voltage-losing circuit is arranged between the voltage-losing tripping device and a main circuit.
The main circuit and the voltage-losing circuit are provided with an energy storage drive control circuit breaking mechanism; the energy storage drive control circuit breaking mechanism is provided with a cut-off main circuit connected in parallel on the main circuit; the main cut-off loop is provided with a rectifying module; the cut-off main loop is provided with a first voltage dividing resistor and a second voltage dividing resistor which are arranged in parallel; the branch on which the second voltage dividing resistor is arranged is connected with a conducting diode and an energy storage module in series.
An electromagnetic loop connected with the energy storage module in parallel is arranged on a branch where the second voltage dividing resistor is positioned; the electromagnetic loop is provided with a direct current electromagnetic mechanism; the voltage-losing line is provided with a voltage-losing contact in magnetic attraction linkage with the direct-current electromagnetic mechanism; one end of the switch connecting rod connected with the voltage-losing contact is provided with a magnetic attraction end which is in magnetic attraction fit with the direct current electromagnetic mechanism; the other end of the switch connecting rod connected with the voltage-losing contact is provided with a normal tension mechanism connected at a fixed position.
As a preferable technical scheme of the invention, the ratio of the resistance value of the first voltage dividing resistor to the resistance value of the second voltage dividing resistor is 1: n, wherein N is greater than or equal to 2.
As a preferable technical scheme of the invention, a voltage division ratio between the conducting diode and the second voltage division resistor is 1: n, wherein N is greater than or equal to 10.
As a preferable technical scheme of the invention, the magnetic suction end adopts a stainless steel magnetic chuck with insulating materials wrapped outside; the normal tension mechanism adopts a tension spring.
As a preferable technical scheme of the invention, a contact structure which is in normally closed contact with the voltage-losing contact is arranged on the voltage-losing circuit; the pulling force of the normal pulling force mechanism is larger than the magnetic attraction force between the magnetic attraction end and the direct current electromagnetic mechanism in the normal state.
The invention comprises a breaker energy storage driving control system based on a transformer substation integrated power system, which comprises the following specific contents:
(1) When abnormal current which does not meet the action of the overcurrent release appears on the main circuit, the main circuit is cut off to obtain abnormal branch current on the main circuit.
(2) And the rectifying module on the main loop is cut off to rectify the abnormal branch current, and the rectified direct current is conducted to the parallel branch of the first voltage dividing resistor and the second voltage dividing resistor.
(3) And a part of the abnormal branch current flows through a branch of the first voltage dividing resistor to be divided, and a part of the abnormal branch current flows to a branch where the second voltage dividing resistor is positioned to be conducted.
(4) And on a branch circuit where the second voltage dividing resistor is positioned, when the voltage division on the conducting diode reaches the conducting voltage, the conducting diode conducts current to charge the energy storage module.
(5) In a certain time, abnormal current which does not meet the action of the overcurrent release for a plurality of times occurs, and the energy storage module performs energy storage and charging for a plurality of times in the time.
(6) And (3) generating electric energy consumption in the time of the electromagnetic loop connected with the energy storage module in the step (5), when the multiple stored electric energy of the energy storage module under the multiple abnormal current impact in the time reaches a certain value, and when the magnetic attraction of the direct current electromagnetic mechanism to the magnetic attraction end is larger than the pull force of the normal tension mechanism, the voltage-losing contact is separated, the voltage-losing release acts, and the free release mechanism completes the release action.
(7) After the abnormal current disappears, the electric energy in the energy storage module gradually drops, and the normal tension mechanism pulls back the voltage-losing contact again to communicate the voltage-losing circuit.
As a preferable technical scheme of the invention, an electric energy detection device for detecting the electric energy state on the energy storage module is arranged outside the circuit breaker; the electric energy detection device transmits the electric energy information on the energy storage module to the background server; and the background server judges the abnormal condition of the electric energy state of the current energy storage module according to the current power demand control parameters of the integrated power supply system of the transformer substation.
The invention has the following beneficial effects:
1. according to the invention, the energy storage drive control circuit breaking mechanism is arranged in the circuit breaker, and the energy storage is carried out for a plurality of times in a certain time to carry out consumption type energy storage, and when the energy storage reaches the standard in the time, the contact cutting operation is carried out on a voltage loss circuit where the voltage loss release is positioned, so that the voltage loss release loses the suction force on the free release mechanism, and the abnormal current cutting operation caused by the abnormal factors of the circuit is completed;
2. according to the invention, the energy storage drive control circuit breaking mechanism is arranged in the circuit breaker, so that the influence of the voltage-loss tripper on the acting force of the overcurrent tripper can be assisted to be cut off when the overcurrent state occurs, and the high-efficiency tripping operation of the overcurrent tripper on the free tripping mechanism is ensured.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an overall schematic diagram of the electrical principle of a circuit breaker of a substation integrated power supply system in the invention;
FIG. 2 is a schematic diagram of the energy storage driving circuit breaker mechanism in FIG. 1;
FIG. 3 is a schematic diagram of the position B (energy storage magnetic attraction linkage) in FIG. 2;
FIG. 4 is a schematic diagram of power information detection according to the present invention;
in the drawings, the list of components represented by the various numbers is as follows:
1-main contacts; 2-a free trip mechanism; 3-an overcurrent release; 4-thermal trip; 5-a voltage-loss release; 6-a voltage-losing circuit; 7-cutting off the main circuit; 8-rectifying module; 9-a first voltage dividing resistor; 10-a second voltage dividing resistor; 11-turn-on diode; 12-an energy storage module; 13-an electromagnetic circuit; 14-a direct current electromagnetic mechanism; 15-a magnetic attraction end; 16-a voltage-losing contact; 17-normal tension mechanism.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The invention relates to a breaker of a transformer substation integrated power supply system, which comprises the following components:
the circuit breaker comprises a main contact 1, a free tripping mechanism 2 is arranged on the main contact 1 in a linkage mode, an overcurrent tripping device 3, a thermal tripping device 4 and a voltage-losing tripping device 5 which are used for pushing the free tripping mechanism 2 are arranged in the circuit breaker, and a voltage-losing circuit 6 is arranged between the voltage-losing tripping device 5 and a main circuit.
An energy storage drive control circuit breaking mechanism A is arranged on the main circuit and the voltage loss circuit 6; the energy storage drive control circuit breaking mechanism A is provided with a main circuit breaking 7 connected in parallel on the main circuit. The rectifier module 8 is arranged on the main cutting loop 7, the first voltage dividing resistor 9 and the second voltage dividing resistor 10 which are arranged in parallel are arranged on the main cutting loop 7, and the ratio of the resistance value of the first voltage dividing resistor 9 to the resistance value of the second voltage dividing resistor 10 is 1:3 or 1:5 or 1:8.
The branch on which the second voltage dividing resistor 10 is arranged is connected in series with a conducting diode 11 and an energy storage module 12, and the voltage dividing ratio between the conducting diode 11 and the second voltage dividing resistor 10 is 1:10 or 1:15 or 1:20.
An electromagnetic circuit 13 connected in parallel with the energy storage module 12 is arranged on the branch where the second voltage dividing resistor 10 is arranged, and a direct current electromagnetic mechanism 14 is arranged on the electromagnetic circuit 13. The voltage-losing circuit 6 is provided with a voltage-losing contact 16 in magnetic attraction linkage with the direct-current electromagnetic mechanism 14, the voltage-losing circuit 6 is provided with a contact structure in normally closed contact with the voltage-losing contact 16, one end of a switch connecting rod connected with the voltage-losing contact 16 is provided with a magnetic attraction end 15 in magnetic attraction cooperation with the direct-current electromagnetic mechanism 14, and the magnetic attraction end 15 adopts a stainless steel magnetic chuck with an insulating material wrapped outside.
The other end of the switch connecting rod connected with the voltage-losing contact 16 is provided with a normal tension mechanism 17 connected at a fixed position, and the tension of the normal tension mechanism 17 is larger than the magnetic attraction between the magnetic attraction end 15 and the direct current electromagnetic mechanism 14 in a normal state, wherein the normal tension mechanism 17 adopts a tension spring.
Example two
The invention relates to a breaker energy storage driving control system based on a transformer substation integrated power system, which specifically comprises the following steps:
(1) When abnormal current which does not meet the action of the overcurrent release 3 appears on the main circuit, the main circuit is cut off to acquire the abnormal branch current on the main circuit.
(2) The rectifying module 8 on the cut-off main circuit rectifies the abnormal branch current, and the rectified direct current is conducted to the parallel branch of the first voltage dividing resistor 9 and the second voltage dividing resistor 10.
(3) A part of the abnormal branch current is branched by the branch of the first voltage dividing resistor 9, and a part of the abnormal branch current is conducted to the branch where the second voltage dividing resistor 10 is located.
(4) On the branch where the second voltage dividing resistor 10 is located, when the divided voltage across the conducting diode 11 reaches the conducting voltage, the conducting diode 11 conducts current, and charges the energy storage module 12.
(5) Abnormal current which does not meet the action of the overcurrent release 3 occurs for a plurality of times within a certain time, and the energy storage module 12 performs energy storage charging for a plurality of times within the time.
(6) When the electromagnetic circuit 13 connected with the energy storage module 12 generates electric energy consumption in the time in the step (5), and when the stored electric energy of the energy storage module 12 under the impact of a plurality of abnormal currents in the time reaches a certain value, the magnetic attraction of the direct current electromagnetic mechanism 14 to the magnetic attraction end 15 is larger than the tension of the normal tension mechanism 17, the voltage-losing contact 16 is separated, the voltage-losing release 5 acts, and the free release mechanism 2 completes the release action;
(7) After the abnormal current disappears, the electric energy in the energy storage module 12 gradually drops, and the normal tension mechanism 17 pulls back the voltage-losing contact 16 again to connect the voltage-losing circuit.
The circuit breaker is provided with an electric energy detection device for detecting the electric energy state of the energy storage module 12, the electric energy detection device transmits electric energy information of the energy storage module 12 to a background server, and the background server judges the abnormal condition of the electric energy state of the current energy storage module 12 according to the current power demand control parameters of the transformer substation integrated power supply system.
In the description of the present specification, reference to the term "embodiment" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. The utility model provides a circuit breaker based on integrated electrical power generating system of transformer substation, includes main contact (1) in the circuit breaker, linkage configuration has free tripping device (2) on main contact (1), including being used for promoting overcurrent release (3), hot trip (4) and the decompression release (5) of free tripping device (2) in the circuit breaker, be equipped with decompression circuit (6), its characterized in that between decompression release (5) and the main circuit:
an energy storage drive control circuit breaking mechanism (A) is arranged on the main circuit and the voltage loss circuit (6);
the energy storage drive control circuit breaking mechanism (A) is provided with a main circuit breaking loop (7) connected in parallel on the main circuit;
the main cutting loop (7) is provided with a rectifying module (8);
the cutting main loop (7) is provided with a first voltage dividing resistor (9) and a second voltage dividing resistor (10) which are arranged in parallel;
a conduction diode (11) and an energy storage module (12) are connected in series on a branch where the second voltage dividing resistor (10) is located;
an electromagnetic loop (13) connected with the energy storage module (12) in parallel is arranged on a branch where the second voltage dividing resistor (10) is arranged;
the electromagnetic circuit (13) is provided with a direct current electromagnetic mechanism (14);
the voltage-losing circuit (6) is provided with a voltage-losing contact (16) which is in magnetic attraction linkage fit with the direct-current electromagnetic mechanism (14);
one end of a switch connecting rod connected with the voltage-losing contact (16) is provided with a magnetic attraction end (15) which is in magnetic attraction fit with the direct current electromagnetic mechanism (14);
the other end of the switch connecting rod connected with the voltage-losing contact (16) is provided with a normal tension mechanism (17) connected at a fixed position.
2. The substation integrated power system-based circuit breaker according to claim 1, wherein:
the ratio of the resistance value of the first voltage dividing resistor (9) to the resistance value of the second voltage dividing resistor (10) is 1: n, wherein N is greater than or equal to 2.
3. The substation integrated power system-based circuit breaker according to claim 1, wherein:
the voltage division ratio between the conducting diode (11) and the second voltage division resistor (10) is 1: n, wherein N is greater than or equal to 10.
4. The substation integrated power system-based circuit breaker according to claim 1, wherein:
the magnetic suction end (15) adopts a stainless steel magnetic chuck with insulating materials wrapped outside;
the normal tension mechanism (17) adopts a tension spring.
5. The substation integrated power system-based circuit breaker according to claim 1, wherein:
a contact structure which is in normally closed contact with the voltage-losing contact (16) is arranged on the voltage-losing circuit (6);
the pulling force of the normal pulling force mechanism (17) is larger than the magnetic attraction force between the normal magnetic attraction end (15) and the direct current electromagnetic mechanism (14).
6. A breaker energy storage drive control system based on a transformer substation integrated power supply system, which is characterized by comprising the breaker based on the transformer substation integrated power supply system according to any one of claims 1-5; the method comprises the following steps:
(1) When abnormal current which does not meet the action of the overcurrent release appears on the main circuit, the main circuit is cut off to obtain abnormal branch current on the main circuit;
(2) The rectifying module on the main loop is cut off to rectify the abnormal branch current, and the rectified direct current is conducted to the parallel branch of the first voltage dividing resistor and the second voltage dividing resistor;
(3) A part of current in the abnormal branch current is shunted through a branch of the first voltage dividing resistor, and the part of current in the abnormal branch current is conducted to a branch where the second voltage dividing resistor is located;
(4) On the branch where the second voltage dividing resistor is located, when the voltage division on the conducting diode reaches the conducting voltage, the conducting diode conducts current to charge the energy storage module;
(5) Abnormal current which does not meet the action of the overcurrent release for a plurality of times occurs within a certain time, and the energy storage module performs energy storage charging for a plurality of times within the time;
(6) When the magnetic attraction force of the direct current electromagnetic mechanism to the magnetic attraction end is larger than the pull force of the normal tension mechanism, the voltage-losing contact is separated, the voltage-losing release acts, and the free release mechanism completes the release action;
(7) After the abnormal current disappears, the electric energy in the energy storage module gradually drops, and the normal tension mechanism pulls back the voltage-losing contact again to communicate the voltage-losing circuit.
7. The energy storage and drive control system for a circuit breaker based on a substation integrated power system of claim 6, wherein:
the circuit breaker is externally provided with an electric energy detection device for detecting the electric energy state on the energy storage module;
the electric energy detection device transmits the electric energy information on the energy storage module to the background server;
and the background server judges the abnormal condition of the electric energy state of the current energy storage module according to the current power demand control parameters of the integrated power supply system of the transformer substation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367444.9A CN113097023B (en) | 2021-04-06 | 2021-04-06 | Circuit breaker based on integrated power supply system of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367444.9A CN113097023B (en) | 2021-04-06 | 2021-04-06 | Circuit breaker based on integrated power supply system of transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113097023A CN113097023A (en) | 2021-07-09 |
| CN113097023B true CN113097023B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110367444.9A Active CN113097023B (en) | 2021-04-06 | 2021-04-06 | Circuit breaker based on integrated power supply system of transformer substation |
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| CN (1) | CN113097023B (en) |
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| Publication number | Publication date |
|---|---|
| CN113097023A (en) | 2021-07-09 |
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