CN111223695A - Phase-selection switching-on and switching-off circuit breaker adopting double mechanisms and control method - Google Patents
Phase-selection switching-on and switching-off circuit breaker adopting double mechanisms and control method Download PDFInfo
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- CN111223695A CN111223695A CN202010039436.7A CN202010039436A CN111223695A CN 111223695 A CN111223695 A CN 111223695A CN 202010039436 A CN202010039436 A CN 202010039436A CN 111223695 A CN111223695 A CN 111223695A
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- circuit breaker
- operating mechanism
- moving contact
- phase
- connecting rod
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- 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
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
- H01H71/43—Electrodynamic 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
- H01H71/70—Power reset mechanisms actuated by electric motor
Abstract
The embodiment of the application provides a phase selection switching-on and switching-off circuit breaker adopting double mechanisms and a control method, which are applied to a neutral point non-effective grounding three-phase power transmission system, measurement signals of a three-phase pressure sensor and a three-phase current sensor are processed through an intelligent control unit, and instructions for a first driving circuit and a second driving circuit are output, the first driving circuit controls a first operating mechanism to drive a first moving contact of the circuit breaker connected to a first connecting rod to be switched on and off, the second driving circuit controls a second operating mechanism to drive a second moving contact of the circuit breaker connected to a second connecting rod to be switched on and off, and a third moving contact of the circuit breaker connected to the second connecting rod to be switched on and off, and a displacement sensor detects state changes of the first operating mechanism and the; one-phase operating mechanism is omitted, and the manufacturing is simple; the possibility of failure of the circuit breaker caused by the fault of a certain phase operating mechanism is reduced, the safety and reliability of the phase selection opening and closing circuit breaker are improved, and the stable and reliable operation of the system is guaranteed.
Description
Technical Field
The application relates to the technical field of manufacturing and using of high-voltage circuit breakers, in particular to a phase selection opening and closing circuit breaker adopting double mechanisms and a control method.
Background
The circuit breaker is a main power control device in a power transmission and transformation line, and can rapidly cut off fault current when a system fails, so that the fault is prevented from further expanding in a power system to damage more power devices, and a protection effect is achieved; the phase selection opening and closing circuit breaker can avoid large impact on a power grid when the traditional three-phase opening and closing circuit breaker is opened and closed simultaneously.
The existing phase selection opening and closing circuit breaker is controlled by three independent operating mechanisms to carry out opening and closing operation on a three-phase circuit breaker, each operating mechanism controls the opening and closing action of a moving contact of one-phase circuit breaker, and the operating mechanisms drive each link to change phase-changing buckles to realize the opening and closing action of the circuit breaker in a linkage mode.
The processing technology requirement of the operating mechanisms in the phase selection opening and closing circuit breaker is high, the transmission links are multiple, the failure probability is increased along with the increase of the number of the operating mechanisms, and the failure of any operating mechanism can cause the phase selection opening and closing circuit breaker to lose effectiveness, so that the loss is brought to a power system.
Disclosure of Invention
The application provides an adopt selection looks divide-shut brake circuit breaker of dual mechanism is applied to the non-effective ground connection three-phase transmission system of neutral point to solve current selection looks divide-shut brake circuit breaker transmission link many, the technical problem that the fault rate is high.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:
in a first aspect, a phase selection opening and closing circuit breaker with a double mechanism is provided, which includes:
the three-phase voltage sensor and the three-phase current sensor are respectively connected to a three-phase power transmission system circuit;
the intelligent control unit is connected with the three-phase voltage sensor, the three-phase current sensor and the displacement sensor;
the intelligent control unit controls two paths of parallel circuits, namely a first driving circuit and a second driving circuit;
the first operating mechanism is controlled by the first driving circuit and is connected with a first moving contact of the circuit breaker through a first connecting rod;
the second operating mechanism is controlled by the second driving circuit and is connected with the second moving contact and the third moving contact of the circuit breaker through a second connecting rod.
Optionally, the method further includes: the displacement sensor is connected with the first operating mechanism and the second operating mechanism.
Optionally, the first operating mechanism is controlled by the first driving circuit, and is connected to the first moving contact of the circuit breaker through a first connecting rod: the first operating mechanism is controlled by the first driving circuit and drives the first connecting rod to move up and down, and the first moving contact of the circuit breaker is switched on and off.
Optionally, the second operating mechanism is controlled by the second driving circuit, and is connected to the second moving contact and the third moving contact of the circuit breaker through a second connecting rod: the second operating mechanism is controlled by the second driving circuit and drives the second connecting rod to move up and down, so that the opening and closing operations of the second moving contact and the third moving contact of the circuit breaker are realized.
Optionally, the second moving contact and the third moving contact of the circuit breaker are connected to the second connecting rod, and are driven by the second connecting rod to act simultaneously.
In a second aspect, a method for controlling a phase selection switching-on/off circuit breaker using a dual mechanism is provided, which is applied to the phase selection switching-on/off circuit breaker using a dual mechanism of the first aspect:
the intelligent control unit acquires voltage and current information detected by the three-phase voltage sensor and the three-phase current sensor;
the intelligent control unit outputs control signals to the first drive circuit and the second drive circuit;
the first driving circuit controls the first operating mechanism to drive the first connecting rod to move, and the opening and closing operation of a first contact of the circuit breaker is realized;
the second driving circuit controls the second operating mechanism to drive the second connecting rod to move, so that the second moving contact and the third moving contact of the circuit breaker are switched on and off simultaneously;
the displacement sensor collects displacement information of the first operating mechanism and the second operating mechanism and transmits the displacement information to the intelligent control unit.
Optionally, during the opening operation:
the intelligent control unit acquires voltage and current information detected by the three-phase voltage sensor and the three-phase current sensor;
the intelligent control unit calculates and compares the phase sum of three-phase voltage and current, predicts the zero crossing point of a line where a first moving contact of the circuit breaker is located, and outputs a control signal to the first driving circuit;
the first driving circuit controls the first operating mechanism to drive the first connecting rod to move so as to realize the opening operation of the first contact of the circuit breaker, and after the first moving contact is opened, the displacement sensor acquires displacement information of the first operating mechanism and transmits the displacement information to the intelligent control unit for processing;
optionally, during the opening operation, the intelligent control unit outputs a control signal to the second driving circuit after receiving the displacement information of the first operating mechanism, the second driving circuit controls the second operating mechanism to drive the second connecting rod to move, so as to realize the opening operation of the second moving contact and the third moving contact of the circuit breaker, and the displacement sensor collects the displacement information of the first operating mechanism and the second operating mechanism and transmits the displacement information to the intelligent control unit.
Optionally, during closing operation:
the intelligent control unit outputs control signals to the first drive circuit and the second drive circuit;
the first driving circuit and the second driving circuit simultaneously control the first operating mechanism and the second operating mechanism to respectively drive the first connecting rod and the second connecting rod to move, and meanwhile, the switching-on operation of the first contact of the circuit breaker, the second moving contact of the circuit breaker and the third moving contact is realized.
The embodiment of the application provides a phase selection switching-on and switching-off circuit breaker adopting double mechanisms and a control method, which are applied to a neutral point non-effective grounding three-phase power transmission system, measurement signals of a three-phase pressure sensor and a three-phase current sensor are processed through an intelligent control unit, and instructions for a first driving circuit and a second driving circuit are output, the first driving circuit controls a first operating mechanism to drive a first moving contact of the circuit breaker connected to a first connecting rod to be switched on and off, the second driving circuit controls a second operating mechanism to drive a second moving contact of the circuit breaker connected to a second connecting rod to be switched on and off, and a third moving contact of the circuit breaker connected to the second connecting rod to be switched on and off, and a displacement sensor detects state changes of the first operating mechanism and the; one-phase operating mechanism is omitted, and the manufacturing is simple; the possibility of failure of the circuit breaker caused by the fault of a certain phase operating mechanism is reduced, the safety and reliability of the phase selection opening and closing circuit breaker are improved, and the stable and reliable operation of the system is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a phase selection opening and closing circuit breaker adopting a dual mechanism according to an embodiment of the present application;
fig. 2 is a flowchart of a phase selection opening and closing circuit breaker control method using a dual mechanism according to an embodiment of the present application;
fig. 3 is a switching-off flow chart of a control method of a phase-selection switching-on/off circuit breaker adopting a dual mechanism according to an embodiment of the present application;
fig. 4 is a closing flow chart of a control method of a phase selection closing and opening circuit breaker using a dual mechanism according to an embodiment of the present application;
wherein: 1-three phase voltage sensor; 2-three phase current sensor; 3-an intelligent control unit; 4-a first drive circuit; 5-a second drive circuit; 6-a first operating mechanism; 7-a second operating mechanism; 8-a first link; 81-a first moving contact of the circuit breaker; 9-a second link; 91-a second moving contact of the circuit breaker; 92-a third movable contact of the circuit breaker; 10-displacement sensor.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present application is described in further detail below with reference to the attached drawing figures:
example one
The embodiment of the application provides a phase selection divide-shut brake circuit breaker adopting double mechanisms, is applied to a neutral point non-effective grounding three-phase power transmission system, and is shown in reference to fig. 1, and comprises the following components:
the three-phase voltage sensor 1 and the three-phase current sensor 2 are respectively connected to a three-phase power transmission system circuit;
the intelligent control unit 3 is connected with the three-phase voltage sensor 1, the three-phase current sensor 2 and the displacement sensor 10;
the intelligent control unit 3 controls two paths of parallel circuits, namely a first driving circuit 4 and a second driving circuit 5;
the first operating mechanism 6 is controlled by the first driving circuit 4 and is connected with a first moving contact 81 of the circuit breaker through a first connecting rod 8;
specifically, the first operating mechanism 6 is controlled by the first driving circuit 4 to drive the first connecting rod 8 to move up and down, so that the opening and closing operations of the first moving contact 81 of the circuit breaker are realized;
the second operating mechanism 7 is controlled by the second driving circuit 5 and is connected with the second moving contact 91 and the third moving contact 92 of the circuit breaker through a second connecting rod 9;
specifically, the second operating mechanism 7 is controlled by the second driving circuit 5 to drive the second connecting rod 9 to move up and down, so that the second moving contact 91 and the third moving contact 92 of the circuit breaker are switched on and off simultaneously;
the displacement sensor 10 is respectively used for acquiring the displacement information states of the first operating mechanism 6 and the second operating mechanism 7.
The embodiment of the application provides a phase selection switching-on and switching-off circuit breaker adopting double mechanisms and a control method, which are applied to a neutral point non-effective grounding three-phase power transmission system, measurement signals of a three-phase pressure sensor and a three-phase current sensor are processed through an intelligent control unit, and instructions for a first driving circuit and a second driving circuit are output, the first driving circuit controls a first operating mechanism to drive a first moving contact of the circuit breaker connected to a first connecting rod to be switched on and off, the second driving circuit controls a second operating mechanism to drive a second moving contact of the circuit breaker connected to a second connecting rod to be switched on and off, and a third moving contact of the circuit breaker connected to the second connecting rod to be switched on and off, and a displacement sensor detects state changes of the first operating mechanism and the; one-phase operating mechanism is omitted, and the manufacturing is simple; the possibility of failure of the circuit breaker caused by the fault of a certain phase operating mechanism is reduced, the safety and reliability of the phase selection opening and closing circuit breaker are improved, and the stable and reliable operation of the system is guaranteed.
Example two
The embodiment of the application provides a control method for a double-mechanism phase selection opening and closing circuit breaker, which is applied to the double-mechanism phase selection opening and closing circuit breaker of a neutral-point non-effective grounding three-phase power transmission system in the first embodiment, and is shown in reference to fig. 2, and comprises the following basic steps:
101. the intelligent control unit acquires voltage and current information detected by the three-phase voltage sensor and the three-phase current sensor;
102. the intelligent control unit outputs control signals to the first drive circuit and the second drive circuit;
103. the first driving circuit controls the first operating mechanism to drive the first connecting rod to move, and the opening and closing operation of a first contact of the circuit breaker is realized;
104. the second driving circuit controls the second operating mechanism to drive the second connecting rod to move, and the opening and closing operation of the second moving contact and the third moving contact of the circuit breaker is realized;
105. the displacement sensor collects displacement information of the first operating mechanism and the second operating mechanism and transmits the displacement information to the intelligent control unit.
When the switching-off operation is performed, as shown in fig. 3, the method includes the following steps:
201. the intelligent control unit acquires voltage and current information detected by the three-phase voltage sensor and the three-phase current sensor;
202. the intelligent control unit calculates and compares the phase sum of three-phase voltage and current, predicts the zero crossing point of a line where a first moving contact of the circuit breaker is located, and outputs a control signal to the first driving circuit;
203. the first driving circuit controls the first operating mechanism to drive the first connecting rod to move so as to realize the opening operation of the first contact of the circuit breaker, and after the first moving contact is opened, the displacement sensor acquires displacement information of the first operating mechanism and transmits the displacement information to the intelligent control unit for processing;
204. the intelligent control unit outputs a control signal to the second driving circuit after receiving the displacement information of the first operating mechanism, the second driving circuit controls the second operating mechanism to drive the second connecting rod to move, the opening operation of the second moving contact and the third moving contact of the circuit breaker is realized, and the displacement sensor collects the displacement information of the first operating mechanism and the second operating mechanism and transmits the displacement information to the intelligent control unit.
During closing operation, as shown in fig. 4, the method includes the following steps:
301. the intelligent control unit outputs control signals to the first drive circuit and the second drive circuit;
302. the first driving circuit and the second driving circuit simultaneously control the first operating mechanism and the second operating mechanism to respectively drive the first connecting rod and the second connecting rod to move, and meanwhile, the switching-on operation of the first contact of the circuit breaker, the second moving contact of the circuit breaker and the third moving contact is realized.
According to the control method of the phase selection switching-on and switching-off circuit breaker adopting the double mechanisms, the intelligent control unit is used for processing the measurement signals of the three-phase pressure sensor and the three-phase current sensor and outputting instructions to the first driving circuit and the second driving circuit, the first driving circuit controls the first operating mechanism to drive the first moving contact of the circuit breaker connected to the first connecting rod to be switched on and off, the second driving circuit controls the second operating mechanism to drive the second moving contact and the third moving contact of the circuit breaker connected to the second connecting rod to be switched on and off, and the displacement sensor is used for detecting the state changes of the first operating mechanism and the second operating mechanism and feeding back the state changes to the intelligent control unit; one-phase operating mechanism is omitted, and the manufacturing is simple; the possibility of failure of the circuit breaker caused by the fault of a certain phase operating mechanism is reduced, the safety and reliability of the phase selection opening and closing circuit breaker are improved, and the stable and reliable operation of the system is guaranteed.
The above-mentioned contents are only for explaining the technical idea of the present application, and the protection scope of the present application is not limited thereby, and any modification made on the basis of the technical idea presented in the present application falls within the protection scope of the claims of the present application.
Claims (9)
1. The utility model provides an adopt selection looks divide-shut brake circuit breaker of dual mechanism which characterized in that includes:
the three-phase voltage sensor (1) and the three-phase current sensor (2) are respectively connected to a three-phase power transmission system circuit;
the intelligent control unit (3) is connected with the three-phase voltage sensor (1), the three-phase current sensor (2) and the displacement sensor (10);
the intelligent control unit (3) controls two paths of parallel circuits, namely a first driving circuit (4) and a second driving circuit (5);
the first operating mechanism (6) is controlled by the first driving circuit (4) and is connected with a first moving contact (81) of the circuit breaker through a first connecting rod (8);
the second operating mechanism (7) is controlled by the second driving circuit (5) and is connected with a second moving contact (91) and a third moving contact (92) of the circuit breaker through a second connecting rod (9).
2. The phase selection closing and opening circuit breaker adopting a double mechanism according to claim 1, further comprising:
the displacement sensor (10) is connected with the first operating mechanism (6) and the second operating mechanism (7).
3. The phase selection switch-on/switch-off circuit breaker adopting a dual mechanism according to claim 1, characterized in that the first operating mechanism (6) is controlled by the first driving circuit (4) and is connected with the first movable contact (81) of the circuit breaker through a first connecting rod (8):
the first operating mechanism (6) is controlled by the first driving circuit (4) to drive the first connecting rod (8) to move up and down, and the opening and closing operation of the first moving contact (81) of the circuit breaker is realized.
4. The phase selection switch-on/switch-off circuit breaker adopting double mechanisms according to claim 1, characterized in that the second operating mechanism (7) is controlled by the second driving circuit (5) and is connected with the second moving contact (91) and the third moving contact (92) of the circuit breaker through a second connecting rod (9):
the second operating mechanism (7) is controlled by the second driving circuit (5) to drive the second connecting rod (9) to move up and down, so that the opening and closing operations of the second moving contact (91) and the third moving contact (92) of the circuit breaker are realized.
5. The phase selection switch-on/switch-off circuit breaker adopting a dual mechanism as claimed in claim 4, wherein the second moving contact (91) and the third moving contact (92) of the circuit breaker are connected to the second connecting rod (9) and are driven to act simultaneously by the second connecting rod (9).
6. A control method of a phase selection switching-on and switching-off circuit breaker adopting double mechanisms is applied to the phase selection switching-on and switching-off circuit breaker adopting double mechanisms in claim 1, and is characterized in that:
the intelligent control unit (3) acquires voltage and current information detected by the three-phase voltage sensor (1) and the three-phase current sensor (2);
the intelligent control unit (3) outputs control signals to the first drive circuit (4) and the second drive circuit (5);
the first driving circuit (4) controls the first operating mechanism (6) to drive the first connecting rod (8) to move, and the opening and closing operation of the first contact (81) of the circuit breaker is realized;
the second driving circuit (5) controls the second operating mechanism (7) to drive the second connecting rod (9) to move, so that the opening and closing operations of the second moving contact (91) and the third moving contact (92) of the circuit breaker are realized;
the displacement sensor (10) collects displacement information of the first operating mechanism (6) and the second operating mechanism (7), and transmits the displacement information to the intelligent control unit (3).
7. The method for controlling the phase selection opening and closing circuit breaker adopting the double mechanisms according to claim 6, characterized in that during opening operation:
the intelligent control unit (3) acquires voltage and current information detected by the three-phase voltage sensor (1) and the three-phase current sensor (2);
the intelligent control unit (3) calculates and compares the phase sum of three-phase voltage and current, predicts the zero crossing point of a line where a first moving contact (81) of the circuit breaker is located, and outputs a control signal to the first driving circuit (4);
the first driving circuit (4) controls the first operating mechanism (6) to drive the first connecting rod (8) to move, the opening operation of the first contact (81) of the circuit breaker is achieved, after the first moving contact (81) is opened, the displacement sensor (10) collects displacement information of the first operating mechanism (6), and transmits the displacement information to the intelligent control unit (3) for processing.
8. The method for controlling the phase selection opening and closing circuit breaker adopting the double mechanisms according to claim 7, characterized by further comprising the following steps during opening operation:
after receiving the displacement information of the first operating mechanism (6), the intelligent control unit (3) outputs a control signal to the second drive circuit (5), the second drive circuit (5) controls the second operating mechanism (7) to drive the second connecting rod (9) to move, so that the simultaneous opening operation of the second moving contact (91) and the third moving contact (92) of the circuit breaker is realized, and the displacement sensor (10) collects the displacement information of the first operating mechanism (6) and the second operating mechanism (7) and transmits the displacement information to the intelligent control unit (3).
9. The method for controlling the phase selection switch-on/switch-off circuit breaker adopting the double mechanism according to claim 6, wherein during switching-on operation:
the intelligent control unit (3) outputs control signals to the first drive circuit (4) and the second drive circuit (5);
the first driving circuit (4) and the second driving circuit (5) simultaneously control the first operating mechanism (6) and the second operating mechanism (7) to respectively drive the first connecting rod (8) and the second connecting rod (9) to move, and simultaneously realize simultaneous switching-on operation of the first contact (81), the second moving contact (91) and the third moving contact (92) of the circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010039436.7A CN111223695A (en) | 2020-01-15 | 2020-01-15 | Phase-selection switching-on and switching-off circuit breaker adopting double mechanisms and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010039436.7A CN111223695A (en) | 2020-01-15 | 2020-01-15 | Phase-selection switching-on and switching-off circuit breaker adopting double mechanisms and control method |
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| CN111223695A true CN111223695A (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010039436.7A Pending CN111223695A (en) | 2020-01-15 | 2020-01-15 | Phase-selection switching-on and switching-off circuit breaker adopting double mechanisms and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420512A (en) * | 2021-12-22 | 2022-04-29 | 平高集团有限公司 | Motor-driven high-voltage circuit breaker and driving system thereof |
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| CN207009360U (en) * | 2017-07-19 | 2018-02-13 | 宝鸡同步电器有限公司 | Dual-mechanism controlled switching capacitor switch |
| CN109671595A (en) * | 2019-01-08 | 2019-04-23 | 程丽娜 | A kind of switch |
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| CN103000409A (en) * | 2012-11-30 | 2013-03-27 | 西安交通大学 | Low frequency breaker with phase-selection brake-separating function |
| CN204857617U (en) * | 2015-06-30 | 2015-12-09 | 河南平高电气股份有限公司 | Circuit breaker fracture transmission and circuit breaker that uses this fracture transmission |
| CN107068504A (en) * | 2017-05-05 | 2017-08-18 | 平高集团有限公司 | The phase selection control method and device of a kind of dual operation mechanisms breaker |
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| CN114420512A (en) * | 2021-12-22 | 2022-04-29 | 平高集团有限公司 | Motor-driven high-voltage circuit breaker and driving system thereof |
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Application publication date: 20200602 |