CN215934533U - Improved generation high voltage circuit breaker control system - Google Patents
Improved generation high voltage circuit breaker control system Download PDFInfo
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- CN215934533U CN215934533U CN202122465093.3U CN202122465093U CN215934533U CN 215934533 U CN215934533 U CN 215934533U CN 202122465093 U CN202122465093 U CN 202122465093U CN 215934533 U CN215934533 U CN 215934533U
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- stepping motor
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- 238000005516 engineering process Methods 0.000 description 4
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- 238000013461 design Methods 0.000 description 2
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Abstract
The utility model discloses an improved high-voltage circuit breaker control system which comprises a closing control loop, an opening control loop and a protection mechanism, wherein the protection mechanism comprises a first current sensor, a second current sensor, a single chip microcomputer and a stepping motor; a second current signal monitoring point is arranged on the closing control loop and is connected with a second current sensor; the first current sensor and the second current sensor are connected with the single chip microcomputer, the single chip microcomputer is connected with the stepping motor, the stepping motor can drive the three-phase asynchronous motor to rotate forward and backward, and the stepping motor is connected with a power supply except the switching-on control loop and the switching-off control loop. The utility model adopts an external protection mechanism, which does not affect the normal operation of the master control system, protects the spring of the microswitch in the travel switch, reduces the failure rate and ensures the normal, stable and reliable operation of the power system or the power grid and the transformer substation.
Description
Technical Field
The utility model belongs to the field of high-voltage circuit breakers, and particularly relates to an improved high-voltage circuit breaker control system.
Background
High-voltage circuit breakers are switching devices in electrical power systems, such as power plants, substations and the like. The system plays an important role in controlling and protecting power equipment such as power generation, power transmission, power transformation, power distribution connection, circuit breaking, circuit protection and the like. The high-voltage circuit breaker can be used for switching on and switching off a circuit under the normal operation conditions of a high-voltage electrical appliance and the like, so that the accident expansion is avoided, and the normal and nondestructive operation of other fault-free power equipment of a power system is ensured. At present, the development of intelligent high-voltage disconnecting switch circuit breakers is changing day by day, and people embed the high-voltage circuit breaker into a high-voltage electrical appliance product by adopting a plurality of advanced technologies such as a computer technology, a CAN bus technology, a digital signal processing technology and the like for realizing the automatic control of a high-voltage power distribution system.
In the practical application process, accidents frequently occur, particularly when a microswitch has a fault, the remote scheduling cannot timely acquire the current state information of the equipment and make a correct decision, so that the fault processing is delayed, and the accident range is enlarged. When a common high-voltage circuit breaker control system is switched on, a mechanical main shaft is driven to rotate to a switch-on position through a three-phase asynchronous alternating-current three-phase asynchronous motor. The main shaft is pressed and contacted with the microswitch at the switching-on position, the microswitch is switched off, the asynchronous motor control loop loses power immediately, and the switching-on operation is completed. However, the micro switch at the switching-on position is always kept in a disconnected state and is pressed and contacted by the main shaft, the spring is easy to be oxidized and damaged, the whole control loop is affected, the failure rate of the operating mechanism is increased, and frequent maintenance is needed.
The chinese utility model patent CN105702533B "a can realize the circuit breaker control circuit design method of two-way supervision of circuit breaker control circuit", disclose a can realize the circuit breaker control circuit design method of two-way supervision of circuit breaker control circuit, this method is through parallelly connected a time delay contact on the auxiliary contact of circuit breaker combined floodgate control circuit, parallelly connected a time delay contact on the auxiliary contact of circuit breaker separating brake control circuit, realize no matter what kind of running state of circuit breaker separating and combining brake can realize the circuit breaker and divide, the simultaneous monitoring function of combined floodgate two sets of control circuit state. However, the patent needs to be modified on the original circuit, and the parallel-connected delay contact can also improve the failure rate of the whole circuit.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide an improved high-voltage circuit breaker control system, which cancels the long-term pressing of the microswitch spring on the basis of not changing the circuit of the original circuit breaker and avoiding the increase of the failure rate of the whole circuit.
In order to achieve the purpose, the utility model provides an improved high-voltage circuit breaker control system which comprises a switching-on control loop and a switching-off control loop, wherein a first travel switch is arranged in the switching-off control loop, a second travel switch is arranged in the switching-on control loop, a three-phase asynchronous motor controls a main shaft to rotate through a transmission case, a trigger block is arranged on the main shaft, the first travel switch and the second travel switch are arranged on two sides of the main shaft, and the trigger block is driven by positive and negative rotation of the main shaft to press the first travel switch and the second travel switch;
the protection mechanism comprises a first current sensor, a second current sensor, a single chip microcomputer and a stepping motor, wherein a first current signal monitoring point is arranged on the opening control loop and connected with the first current sensor; a second current signal monitoring point is arranged on the closing control loop and is connected with a second current sensor; the first current sensor and the second current sensor are connected with the single chip microcomputer, the single chip microcomputer is connected with the stepping motor, the stepping motor can drive the three-phase asynchronous motor to rotate forward and backward, and the stepping motor is connected with a power supply except the switching-on control loop and the switching-off control loop.
Furthermore, photoelectric isolators are arranged between the first current signal monitoring point and the singlechip as well as between the second current signal monitoring point and the singlechip, and a stepping driving module is arranged between the stepping motor and the singlechip.
Furthermore, the device also comprises a near control and remote control change-over switch SBT2, a switching-off control loop is connected with a switching-off remote control and normally open button SB1, and the switching-off remote control and normally open button SB1 is connected in parallel and then is connected with the first current sensor in series; the closing control loop is connected with a closing remote control and normally open button SB2, and the closing remote control and normally open button SB2 is connected in parallel and then connected in series with the second current sensor.
Furthermore, the output shafts of the three-phase asynchronous motor and the stepping motor are respectively connected with chain wheels, and the two chain wheels are connected through a transmission chain.
The utility model has the beneficial effects that:
the improved high-voltage circuit breaker control system adopts the external protection mechanism, so that the normal operation of the master control system is not influenced, and meanwhile, the travel switch is not in a disconnected state for a long time any more, the spring of the micro switch in the travel switch is greatly protected, the failure rate is reduced, and the normal, stable and reliable operation of a power system or a power grid and a transformer substation is ensured.
Drawings
FIG. 1 is a schematic view of the driving principle of the protection mechanism and the three-phase asynchronous motor according to the present invention;
FIG. 2 is a schematic view of a connection structure between a stepping motor and a three-phase asynchronous motor of the protection mechanism according to the present invention;
fig. 3 is a schematic diagram of a connection circuit between a current signal monitoring point of the protection mechanism and a circuit breaker control circuit according to the present invention.
In the figure: 1. a main shaft; 2. a trigger block; 3. a first travel switch; 4. a second travel switch; 5. a sprocket; 6. a three-phase asynchronous motor; 7. a drive chain; 8. a stepper motor.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the utility model, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; the two elements may be connected directly or indirectly through an intermediary, or the two elements may be interconnected.
As shown in fig. 2 and 3, an improved high-voltage circuit breaker control system includes a switching-on control loop and a switching-off control loop, wherein a first travel switch 3 is arranged in the switching-off control loop, a second travel switch 4 is arranged in the switching-on control loop, a three-phase asynchronous motor 6 controls a main shaft 1 to rotate through a transmission case, a trigger block 2 is mounted on the main shaft 1, the first travel switch 3 and the second travel switch 4 are arranged on two sides of the main shaft 1, and the trigger block 2 is driven by the forward and reverse rotation of the main shaft 1 to press the first travel switch 3 and the second travel switch 4;
as shown in fig. 1 and 3, the protection device further comprises a protection mechanism, wherein the protection mechanism comprises a first current sensor, a second current sensor, a single chip microcomputer and a stepping motor 8, a first current signal monitoring point is arranged on the opening control loop and connected with the first current sensor; a second current signal monitoring point is arranged on the closing control loop and is connected with a second current sensor; the first current sensor and the second current sensor are connected with the single chip microcomputer, the single chip microcomputer is connected with the stepping motor 8, the stepping motor 8 can drive the three-phase asynchronous motor 6 to rotate positively and negatively, and the stepping motor 8 is connected with a power supply except for the switching-on control loop and the switching-off control loop.
As shown in fig. 1, in one example, a photo-isolator is installed between the first current signal monitoring point, the second current signal monitoring point, and the single chip, and a step driving module is installed between the step motor 8 and the single chip.
As shown in fig. 3, in one example, the current sensor further comprises a near-control and remote-control changeover switch SBT2, the opening control loop is connected with an opening remote-control and normally-open button SB1, and the opening remote-control and normally-open button SB1 is connected in parallel and then connected in series with the first current sensor; the closing control loop is connected with a closing remote control and normally open button SB2, and the closing remote control and normally open button SB2 is connected in parallel and then connected in series with the second current sensor.
As shown in fig. 2, in one example, the output shafts of the three-phase asynchronous motor 6 and the stepping motor 8 are respectively connected with a chain wheel 5, and the two chain wheels 5 are connected through a transmission chain 7.
The working principle of the utility model is as follows:
the improved high-voltage circuit breaker control system is characterized in that a stepping motor 8 is added, two chain wheels 5 with the same size and model are respectively arranged on rotating shafts of the two motors and are connected by a transmission chain 7 to drive a three-phase asynchronous motor 6, so that a main shaft 1 is restored to a zero position, a spring of a microswitch is not pressed any more, and a protection mechanism is formed.
Taking closing as an example, when the high-voltage circuit breaker control system is closed, the near-control and remote-control change-over switch SBT2 is switched to remote control or near control, and when the near control is performed, the normally open button SB2 is pressed, and the closing loop is electrified. The three-phase asynchronous motor 6 is started to drive the main shaft 1 to rotate to a switching-on position, the second travel switch 4 at the switching-on position is pressed and contacted, the second travel switch at the switching-on position is disconnected, the switching-on control loop is immediately powered off, and the main shaft 1 is pressed and contacted with the second travel switch at the switching-on position for a long time, so that the SP2 is kept in a disconnected state. At this time, the closing control loop loses power, and the three-phase asynchronous motor 6 stops rotating.
The first current signal monitoring point and the second current signal monitoring point can detect current and interpret the rotation direction of the three-phase asynchronous motor 6, so that the adjustment back direction of the stepping motor 8 is determined. The singlechip delays to start, the stepping motor 8 is electrified after the three-phase asynchronous motor 6 stops rotating, the stepping motor 8 drives the three-phase asynchronous motor 6 to rotate through the chain wheel 5 and the transmission chain 7, the main shaft 1 rotates to the initial position along with the rotation, the main shaft leaves a contact, and the second travel switch at the switching-on position is switched to be closed. After the closing operation is completed, the main shaft 1 does not always press and contact the second travel switch at the closing position, the SP2 is kept closed, the effect of protecting the spring is achieved, and the failure rate of the operating mechanism is effectively reduced.
The control method of the utility model comprises the following steps:
1. the closing operation is as follows:
firstly, turning off a power switch and switching on a power supply of the protection mechanism.
And step two, when remote control/near control is needed, the near control and remote control change-over switch SBT2 is switched to remote control/near control. When closing, the closing remote control/normally open button SB2 is closed. The control coil of the alternating current contactor KM2 for closing is connected, three pairs of main contacts KM2 are closed, so that the three-phase asynchronous motor 6 is connected with a power supply, the three-phase asynchronous motor 6 transmits torque to the mechanism main shaft 1 through a mechanical speed reduction system, the main shaft 1 rotates, when the main shaft 1 rotates to an opening end position, the trigger block 2 arranged on the main shaft 1 presses and contacts the second travel switch 4, the second travel switch 4 is disconnected, the control power supply of the alternating current contactor KM2 for closing is cut off, the contactor returns to the original position, and then the three-phase asynchronous motor 6 stops rotating.
Triggering a protection mechanism, closing a remote control/normally open button SB2 to make a second current sensor of a second current signal monitoring point sense current, triggering a single chip microcomputer, starting a stepping motor 8 by the delay time t (t can be selected to be 5 seconds) of the single chip microcomputer, driving a three-phase asynchronous motor 6 to rotate to an initial position (for example, rotating for two circles to make a main shaft 1 return to a zero position) by the stepping motor 8 through a chain wheel 5 and a transmission chain 7, making a trigger block 2 on the main shaft 1 leave a contact of a second travel switch 4, and not pressing a spring.
2. The switching-off operation is as follows:
similar to the closing operation, the switching-off remote control/normally open button SB1 is closed instead, the first current sensor senses the current, the singlechip delays to drive the stepping motor 8 to rotate in the opposite direction, so that the trigger block 2 leaves the first travel switch 3 and does not press the spring any more.
In conclusion, the main shaft can be reset after switching-on and switching-off operations, failure of the microswitch spring is avoided, and the stability of circuit breaker control is not influenced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical spirit and features of the present invention, and the present invention is not limited thereto but may be implemented by those skilled in the art.
Claims (4)
1. An improved high-voltage circuit breaker control system comprises a switching-on control loop and a switching-off control loop, wherein a first travel switch (3) is arranged in the switching-off control loop, a second travel switch (4) is arranged in the switching-on control loop, a three-phase asynchronous motor (6) controls a main shaft (1) to rotate through a transmission case, a trigger block (2) is installed on the main shaft (1), the first travel switch (3) and the second travel switch (4) are arranged on two sides of the main shaft (1), and the trigger block (2) is driven by positive and negative rotation of the main shaft (1) to press the first travel switch (3) and the second travel switch (4);
the method is characterized in that: the protection device also comprises a protection mechanism, wherein the protection mechanism comprises a first current sensor, a second current sensor, a single chip microcomputer and a stepping motor (8), a first current signal monitoring point is arranged on the opening control loop and is connected with the first current sensor; a second current signal monitoring point is arranged on the closing control loop and is connected with a second current sensor; the first current sensor and the second current sensor are connected with the single chip microcomputer, the single chip microcomputer is connected with the stepping motor (8), the stepping motor (8) can drive the three-phase asynchronous motor (6) to rotate positively and negatively, and the stepping motor (8) is connected with a power supply except for the switching-on control loop and the switching-off control loop.
2. An improved high voltage circuit breaker control system as claimed in claim 1, wherein: photoelectric isolators are arranged between the first current signal monitoring point and the second current signal monitoring point and the single chip microcomputer, and a stepping driving module is arranged between the stepping motor (8) and the single chip microcomputer.
3. An improved high voltage circuit breaker control system as claimed in claim 1, wherein: the switching-off control circuit is connected with a switching-off remote control and normally-open button SB1, and the switching-off remote control and normally-open button SB1 is connected in parallel and then connected in series with the first current sensor; the closing control loop is connected with a closing remote control and normally open button SB2, and the closing remote control and normally open button SB2 is connected in parallel and then connected in series with the second current sensor.
4. An improved high voltage circuit breaker control system as claimed in claim 1, wherein: the output shafts of the three-phase asynchronous motor (6) and the stepping motor (8) are respectively connected with a chain wheel (5), and the two chain wheels (5) are connected through a transmission chain (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122465093.3U CN215934533U (en) | 2021-10-13 | 2021-10-13 | Improved generation high voltage circuit breaker control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122465093.3U CN215934533U (en) | 2021-10-13 | 2021-10-13 | Improved generation high voltage circuit breaker control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215934533U true CN215934533U (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122465093.3U Expired - Fee Related CN215934533U (en) | 2021-10-13 | 2021-10-13 | Improved generation high voltage circuit breaker control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215934533U (en) |
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2021
- 2021-10-13 CN CN202122465093.3U patent/CN215934533U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220301 |