CN113096985A - Isolating switch on-off monitoring device - Google Patents
Isolating switch on-off monitoring device Download PDFInfo
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- CN113096985A CN113096985A CN202110379087.8A CN202110379087A CN113096985A CN 113096985 A CN113096985 A CN 113096985A CN 202110379087 A CN202110379087 A CN 202110379087A CN 113096985 A CN113096985 A CN 113096985A
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- signal processing
- isolating switch
- disconnecting switch
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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
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
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Abstract
The invention discloses a disconnecting switch opening and closing monitoring device. This isolator divide-shut brake monitoring devices includes: the device comprises a contact position acquisition module, a current signal acquisition module and a signal processing module; the contact position acquisition module is arranged on an insulator base of the isolating switch and used for acquiring the relative positions of two contacts of the isolating switch and forming a position signal; the current signal acquisition module is arranged on a circuit connected with a motor of the isolating switch and used for acquiring current flowing through the motor and forming a current signal, wherein the motor is used for driving a moving contact of the isolating switch to realize switching on and off; the signal processing module is respectively connected with the contact position acquisition module and the current signal acquisition module and used for judging the opening and closing state of the isolating switch according to the position signal and the current signal. The disconnecting switch opening and closing monitoring device provided by the invention achieves the effect of improving the safety and reliability of the disconnecting switch.
Description
Technical Field
The invention relates to an intelligent power transmission and transformation technology, in particular to an isolating switch opening and closing monitoring device.
Background
Whether the disconnecting switch is switched on or off in place is significant for safe operation of the disconnecting switch. When the high-load current runs, the isolation switch is heated seriously and even accidents are caused due to the fact that the isolation switch is not switched on or off in place slightly.
And the position of the isolating switch is judged by mechanical indication, auxiliary switch or operation experience at present. As the operation life of the isolating switch is increased, the fault rate and the error are increased; the operation experience judgment is judged by observing the verticality and the levelness of the isolating switch, the judgment results of different human experiences and observation angles are completely different, and the subjectivity is strong; in summary, the safety and reliability of the judgment of the state of the isolating switch are poor at present.
Disclosure of Invention
The invention provides a disconnecting switch opening and closing monitoring device, which aims to improve the safety and reliability of a disconnecting switch.
The invention provides a monitoring device for the opening and closing of an isolating switch, which comprises: the device comprises a contact position acquisition module, a current signal acquisition module and a signal processing module, wherein the contact position acquisition module is arranged on an insulator base of the isolating switch and is used for acquiring the relative positions of two contacts of the isolating switch and forming a position signal; the current signal acquisition module is arranged on a circuit connected with a motor of the isolating switch and used for acquiring current flowing through the motor and forming a current signal, wherein the motor is used for driving a moving contact of the isolating switch to realize switching on and off; the signal processing module is respectively connected with the contact position acquisition module and the current signal acquisition module and is used for judging the opening and closing state of the isolating switch according to the position signal and the current signal.
Optionally, the contact position acquisition module includes: the infrared correlation unit comprises a transmitting end, a first receiving end and a second receiving end; the transmitting end is arranged on a base of an insulator connected with a moving contact of the isolating switch and acts along with the moving contact; the first receiving end is arranged on a base of the insulator connected with the fixed contact of the isolating switch; the second receiving end is arranged at a first position of the isolating switch base; when the isolation switch is closed, the first receiving end receives the infrared signal sent by the transmitting end, generates a first position signal and transmits the first position signal to the signal processing module; when the isolating switch is completely disconnected, the second receiving end receives the infrared signal sent by the transmitting end, generates a second position signal and transmits the second position signal to the signal processing module.
Optionally, the contact position acquisition module includes: the magnetic field induction unit is arranged on a base of the insulator connected with the moving contact of the isolating switch; when the base of the insulator connected with the moving contact rotates to a first preset angle, the magnetic field sensing unit generates a third position signal and transmits the third position signal to the signal processing module; when the base of the insulator connected with the moving contact rotates to a second preset angle, the magnetic field sensing unit generates a fourth position signal and transmits the fourth position signal to the signal processing module.
Optionally, the disconnecting switch opening and closing monitoring device further comprises a display device, wherein the display device is connected with the signal processing module and used for displaying the opening and closing state of the disconnecting switch, and the opening and closing state comprises closing, opening and faults.
Optionally, the current signal collecting module includes a signal converting unit, and the signal converting unit is configured to convert the collected current signal from an analog quantity to a digital quantity, where a current signal whose analog quantity does not exceed a set value is converted into a digital quantity 0, and a current signal whose analog quantity exceeds the set value is converted into a digital quantity 1.
Optionally, the magnetic field sensing unit is a hall position sensor.
Optionally, when the digital quantity corresponding to the current signal received by the signal processing module is 1, determining that the isolating switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal is received, judging that the isolating switch is switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal is received, the disconnecting switch is judged to be switched off.
Optionally, when the digital quantity corresponding to the current signal received by the signal processing module is 1, determining that the isolating switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and a third position signal is received, judging that the isolating switch is switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the fourth position signal is received, the disconnecting switch is judged to be switched off.
Optionally, when the digital quantity corresponding to the current signal received by the signal processing module is 1, determining that the isolating switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal and the third position signal are received, judging that the isolating switch is switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal and the fourth position signal are received, the disconnecting switch is judged to be switched off.
Optionally, this isolator divide-shut brake monitoring devices still includes: and the alarm module is connected with the signal processing module and is used for giving an alarm when the isolating switch breaks down.
According to the disconnecting switch on-off monitoring device provided by the invention, the relative position relation between the moving contact and the static contact can be acquired by arranging the contact position acquisition module, the current signal acquisition module acquires the current flowing through the motor for acquiring the disconnecting switch, and the signal processing module determines the state of the disconnecting switch by analyzing the position signal and the current signal, so that the intelligent judgment on the state of the disconnecting switch is realized, the dependence on the subjective judgment of field workers is reduced, the safety fault caused by insufficient switching-on and switching-off of the disconnecting switch or the fault can be avoided, and the effect of improving the safety and reliability of the disconnecting switch is achieved.
Drawings
Fig. 1 is a schematic structural diagram of an isolating switch opening and closing monitoring device provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another disconnecting switch closing and opening monitoring device provided in the embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an installation position of a contact position acquisition module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another isolating switch opening and closing monitoring device provided in the embodiment of the present invention;
fig. 5 is a logic diagram of a state judgment of a disconnecting switch according to an embodiment of the present invention;
fig. 6 is a logic diagram of another state judgment of the disconnector according to the embodiment of the present invention;
fig. 7 is a logic diagram of a further status determination of a disconnector according to an embodiment of the present invention;
fig. 8 is a logic diagram of a further status determination for a disconnector according to an embodiment of the present invention;
fig. 9 is a logic diagram of a further status determination for a disconnector according to an embodiment of the present invention;
fig. 10 is a logic diagram of a further status determination for a disconnector according to an embodiment of the present invention;
fig. 11 is a logic diagram of a further status determination of a disconnector according to an embodiment of the present invention;
fig. 12 is a logic diagram of a further status determination for a disconnector according to an embodiment of the present invention;
fig. 13 is a logic diagram of a further state judgment of the disconnector according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the invention provides an isolating switch opening and closing monitoring device. Fig. 1 is a schematic structural diagram of an isolating switch closing and opening monitoring device provided in an embodiment of the present invention, and referring to fig. 1, the isolating switch closing and opening monitoring device 100 includes: a contact position acquisition module 101, a current signal acquisition module 102 and a signal processing module 103; the contact position acquisition module 101 is arranged on an insulator base of the isolating switch and used for acquiring the relative positions of two contacts of the isolating switch and forming a position signal; the current signal acquisition module 102 is arranged on a circuit connected with a motor of the isolating switch and used for acquiring current flowing through the motor and forming a current signal, wherein the motor is used for driving a moving contact of the isolating switch to realize switching on and off; the signal processing module 103 is respectively connected to the contact position acquisition module 101 and the current signal acquisition module 102, and is configured to determine the switching-on/off state of the disconnecting switch according to the position signal and the current signal.
The contact position acquisition module 101 is a device capable of acquiring relative positions of a moving contact and a fixed contact of the isolating switch, and can also generate a position signal according to the relative positions of the moving contact and the fixed contact, and send the position signal to the signal processing module 103. The current signal acquisition module 102 is disposed on a connection line of a transmission motor of the isolating switch, and can acquire current flowing through the motor to form a current signal and transmit the current signal to the signal processing module 103, and the current signal acquisition module 102 is a current transformer. The transmission motor is a motor which drives a moving contact of the isolating switch to act. The signal processing module 103 is a central processing unit of the disconnecting switch on-off monitoring device 100, and can judge the state of the disconnecting switch according to the received position signal and the current signal.
For example, when the isolating switch works, the motor drives the moving contact to move through the transmission rod, and when the moving contact and the fixed contact are completely contacted or the distance between the moving contact and the fixed contact reaches a preset value, the contact position acquisition module 101 acquires the relative position of the moving contact and the fixed contact, generates a position signal, and sends the position signal to the signal processing module 103. Meanwhile, the current signal collecting module 102 collects the current flowing through the motor, generates a current signal and transmits the current signal to the signal processing module 103. The signal processing module 103 receives the position signal and the current signal and then analyzes the signals. And if the current flowing through the motor exceeds a preset value, judging that the isolating switch has a fault. And if the current flowing through the motor is in the normal range and the moving contact and the static contact are superposed, judging that the isolating switch is in the opening state. And if the current flowing through the motor is in the normal range and the distance between the movable contact and the fixed contact reaches the preset distance, judging that the isolating switch is in a closing state.
The isolator divide-shut brake monitoring devices that this embodiment provided, be provided with the relative position relation that contact position collection module can gather moving contact and static contact, the electric current size of the motor that the acquisition isolator was flowed through to the electric current signal collection module, signal processing module judges isolator's state through analysis position signal and electric current signal, the intelligent judgement to the isolator state has been realized, the reliance to the subjective judgement of field work personnel has been reduced, can avoid isolator's the not abundant or the safety fault that the trouble caused of combined floodgate separating brake, reach the effect that improves isolator security and reliability.
Fig. 2 is a schematic structural diagram of another disconnecting switch closing and closing monitoring device provided in the implementation of the present invention, fig. 3 is a schematic mounting position diagram of a contact position acquisition module provided in the implementation of the present invention, in which a dotted line portion is a shielding invisible portion, referring to fig. 2 and fig. 3, optionally, the contact position acquisition module 101 includes: the infrared correlation unit 201, the infrared correlation unit 201 includes a transmitting end 301, a first receiving end 302 and a second receiving end 303; the transmitting terminal 301 is arranged on a base of an insulator 306 connected with a moving contact of the isolating switch and acts along with the moving contact 305; the first receiving terminal 302 is arranged on a base of an insulator 307 connected with a fixed contact of the isolating switch; the second receiving terminal 303 is arranged at a first preset position of the isolating switch base 308; when the isolation switch is closed, the first receiving terminal 302 receives the infrared signal sent by the transmitting terminal 301, generates a first position signal and transmits the first position signal to the signal processing module 103; when the isolating switch is completely disconnected, the second receiving terminal 303 receives the infrared signal transmitted by the transmitting terminal 301 and generates a second position signal, which is transmitted to the signal processing module 103.
The infrared correlation unit 201 is a device for performing correlation detection by using infrared laser, and includes a transmitting terminal 301, a first receiving terminal 302, and a second receiving terminal 303. The transmitting terminal 301 is a terminal capable of emitting infrared laser, and is disposed on the base of the insulator 306 connected to the moving contact of the isolating switch. The first receiving end 302 is an end for receiving infrared laser, and is disposed on a base of the insulator 307 connected to the fixed contact of the isolating switch, when the moving contact 305 and the fixed contact 304 are completely overlapped, that is, when the isolating switch completes a switch-on, the first receiving end 302 is directly opposite to the transmitting end 301, and at this time, the first receiving end 302 can receive the infrared ray emitted from the transmitting end 301 and generate a first position signal to be sent to the signal processing module 103. The second receiving end 303 is also an end for receiving the infrared laser, and is disposed at a first preset position of the base 308 of the isolating switch, where the first preset position may be a point on the directional ray which is directly opposite to the transmitting end 301 under the condition that the isolating switch is completely opened, and when the isolating switch completes the opening action, the second receiving end 303 is directly opposite to the transmitting end 301, and may receive the infrared ray sent by the transmitting end 301 and generate a second position signal to send to the signal processing module 103. The direct alignment means that the receiving port of the first receiving end 302 or the second receiving end 303 is just above the ray where the infrared laser emitted from the emitting end 301 is located, and can receive the infrared ray emitted from the emitting end 301. The moving contact 305 and the insulator 307 base connected with the static contact can both be porcelain insulator, the rigidity is good, the static electricity is not charged, the displacement is not easy to generate, and the insulator 306 base connected with the moving contact can move along with the moving contact 305.
Illustratively, when the disconnecting switch performs a closing action, the motor drives the moving contact 305 of the disconnecting switch and the base of the insulator 306 connected to the moving contact to perform an action through the transmission rod, at this time, the moving contact 305 performs an action close to the fixed contact 304, when the moving contact 305 and the fixed contact 304 are completely contacted, the first receiving end 302 on the base of the insulator 307 connected to the fixed contact is directly opposite to the transmitting end 301 on the base of the insulator 306 connected to the moving contact, the first receiving end 302 receives the infrared laser emitted by the transmitting end 301, and then generates a first position signal and transmits the first position signal to the signal processing module 103. Meanwhile, the current signal acquisition module 102 acquires current flowing through the motor, generates a current signal and sends the current signal to the signal processing circuit, the signal processing module 103 receives and analyzes the first position signal and the current signal, and if the current signal is analyzed to obtain a conclusion that the current flowing through the motor is higher than a preset value, the isolating switch is directly judged to have a fault. And if the current signal is analyzed to obtain that the current passing through the motor is in a normal range, judging that the isolating switch is in a closing state. On the other hand, when the disconnecting switch performs the opening operation, the motor drives the moving contact 305 of the disconnecting switch and the base of the insulator 306 connected to the moving contact to perform the operation through the transmission rod, at this time, the moving contact 305 performs the operation of being away from the fixed contact 304, when the moving contact 305 reaches the opening preset position, the second receiving end 303 located at the first preset position is directly opposite to the transmitting end 301 on the base of the insulator 306 connected to the moving contact, the second receiving end 303 receives the infrared laser emitted by the transmitting end 301, and then the second position signal is generated and sent to the signal processing module 103. Meanwhile, the current signal acquisition module 102 acquires current flowing through the motor, generates a current signal and sends the current signal to the signal processing circuit, the signal processing module 103 receives and analyzes the second position signal and the current signal, and if the current signal is analyzed to obtain a conclusion that the current flowing through the motor is higher than a preset value, the isolating switch is directly judged to have a fault. And if the current signal is analyzed to obtain that the current passing through the motor is in a normal range, judging that the isolating switch is in an opening state.
The disconnecting switch opening and closing monitoring device provided by the embodiment of the invention is provided with the infrared correlation unit, the infrared correlation unit realizes the collection of the relative positions of the movable contact and the fixed contact by utilizing the correlation of infrared rays, and the signal processing module realizes the judgment of the fault and the opening and closing state of the disconnecting switch by combining and analyzing the position signal collected by the infrared correlation unit and the current signal collected by the current collecting module, thereby achieving the effect of improving the safety and the reliability of the disconnecting switch.
With continued reference to fig. 2 and 3, optionally, the contact position acquisition module 101 includes: the magnetic field induction unit 202, the magnetic field induction unit 202 is arranged on the base of the insulator 306 connected with the moving contact of the isolating switch; when the base of the insulator 306 connected to the moving contact rotates to a first preset angle, the magnetic field sensing unit 202 generates a third position signal and transmits the third position signal to the signal processing module 103; when the base of the insulator 306 connected to the moving contact rotates to a second preset angle, the magnetic field sensing unit 202 generates a fourth position signal and transmits the fourth position signal to the signal processing module 103.
The magnetic field sensing unit 202 is a device for determining the relative position of the moving contact 304 and the stationary contact by using a magnetic field sensing principle, and the magnetic field sensing unit 202 is a hall position sensor and is arranged on a base of an insulator 306 connected to a moving contact of the isolating switch. When the base of the insulator 306 connected to the moving contact rotates to a first preset angle, the moving contact 305 and the fixed contact 304 are completely contacted, at this time, the disconnecting switch is in a closing state, and the magnetic field sensing unit 202 generates a third position signal and transmits the third position signal to the signal processing module 103. When the base of the insulator 306 connected to the moving contact rotates to a second preset angle, the moving contact 305 moves to a preset opening position away from the fixed contact 304, at this time, the disconnecting switch is in an opening state, and the magnetic field sensing unit 202 generates a fourth position signal and transmits the fourth position signal to the signal processing module 103.
Illustratively, when the isolator is switched on, the motor drives the insulator 306 base connected to the moving contact of the isolator to rotate through the transmission rod, at this time, the moving contact 305 moves close to the fixed contact 304, when the insulator 306 base connected to the moving contact rotates to a first preset angle, the moving contact 305 and the fixed contact 304 are in complete contact, and the magnetic field sensing unit 202 generates a third position signal and sends the third position signal to the signal processing module 103. Meanwhile, the current signal acquisition module 102 acquires current flowing through the motor, generates a current signal and sends the current signal to the signal processing circuit, the signal processing module 103 receives and analyzes the third position signal and the current signal, and if the current signal is analyzed to obtain a conclusion that the current flowing through the motor is higher than a preset value, the isolating switch is directly judged to have a fault. And if the current signal is analyzed to obtain that the current passing through the motor is in a normal range, judging that the isolating switch is in a closing state. On the other hand, when the isolator performs the opening operation, the motor drives the insulator 306 base connected to the moving contact of the isolator to perform the rotation operation through the transmission rod, at this time, the moving contact 305 performs the operation of being away from the fixed contact 304, when the insulator 306 base connected to the moving contact rotates to the second preset angle, the moving contact 305 reaches the opening preset position, and the magnetic field sensing unit 202 generates the fourth position signal and sends the fourth position signal to the signal processing module 103. Meanwhile, the current signal acquisition module 102 acquires current flowing through the motor, generates a current signal and sends the current signal to the signal processing circuit, the signal processing module 103 receives and analyzes the fourth position signal and the current signal, and if the current signal is analyzed to obtain a conclusion that the current flowing through the motor is higher than a preset value, the isolating switch is directly judged to have a fault. And if the current signal is analyzed to obtain that the current passing through the motor is in a normal range, judging that the isolating switch is in an opening state.
The disconnecting switch opening and closing monitoring device provided by the embodiment of the invention is provided with the magnetic field sensing unit, the infrared correlation unit realizes the collection of the relative positions of the movable contact and the fixed contact by utilizing the correlation of infrared rays, and the signal processing module realizes the judgment of the fault and the opening and closing state of the disconnecting switch by combining and analyzing the position signal collected by the infrared correlation unit and the current signal collected by the current collecting module, thereby achieving the effect of improving the safety and the reliability of the disconnecting switch.
Fig. 4 is a schematic structural diagram of another isolating switch closing and closing monitoring device provided in the embodiment of the present invention, referring to fig. 4, optionally, the isolating switch closing and closing monitoring device 100 further includes a display device 401, where the display device 401 is connected to the signal processing module 103 and is configured to display a closing and closing state of the isolating switch, where the closing and closing state includes closing, opening and failure.
The display device 401 may be an LED display screen, and may display the switching-on/off state of the disconnecting switch, where the switching-on/off state includes switching-on, switching-off and fault.
With continued reference to fig. 4, optionally, the disconnecting switch opening and closing monitoring device 100 further includes: and the alarm module 402 is connected with the signal processing module 103, and is used for giving an alarm when the isolating switch has a fault.
The disconnecting switch on-off monitoring device provided by the embodiment of the invention is provided with the display equipment and the alarm module, can display the on-off state of the disconnecting switch, is convenient for a user to check in real time, and can also give an alarm when the disconnecting switch fails to remind a worker to respond in time, so that the monitoring on the state of the disconnecting switch and the alarm on the fault are realized, and the effects of improving the reliability of the disconnecting switch and reducing the influence of the fault are achieved.
With continued reference to fig. 4, optionally, the current signal collecting module 102 includes a signal converting unit 403, where the signal converting unit 403 is configured to convert the collected current signal from an analog quantity to a digital quantity, where a current signal whose analog quantity does not exceed a set value is converted into a digital quantity of 0, and a current signal whose analog quantity exceeds a set value is converted into a digital quantity of 1.
The signal conversion unit 403 may be an analog-to-digital conversion device, and may convert the acquired current signal from an analog quantity to a digital quantity, when the motor fails, the current flowing through the motor will far exceed a normal value, and when the current signal at the input end of the signal conversion unit 403 is greater than a preset value, the signal conversion unit 403 outputs the digital quantity of 1 and transmits the digital quantity to the signal processing module 103. When the motor normally operates, the current flowing through the motor is smaller than the preset value, and the analog-to-digital conversion equipment outputs a digital quantity of 0 and transmits the digital quantity to the signal processing module 103.
The disconnecting switch on-off monitoring device provided by the embodiment of the invention is provided with the signal conversion unit, can convert the current signal of the motor from an analog signal into a digital signal, is convenient for the signal processing module to judge the state of the disconnecting switch, and achieves the effect of high visibility of the state of the disconnecting switch.
Fig. 5 is a logic schematic diagram of a state judgment of an isolator according to an embodiment of the present invention, fig. 6 is a logic schematic diagram of another state judgment of an isolator according to an embodiment of the present invention, and fig. 7 is a logic schematic diagram of a state judgment of another isolator according to an embodiment of the present invention, referring to fig. 5, fig. 6, and fig. 7, optionally, when a digital value corresponding to a current signal received by the signal processing module is 1, it is determined that the isolator has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal is received, judging that the isolating switch is switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal is received, the disconnecting switch is judged to be switched off.
The digital quantity corresponding to the current signal received by the signal processing module is 1, and the current signal acquisition module acquires that the current flowing through the motor exceeds a preset value, namely the motor breaks down. The digital quantity corresponding to the current signal received by the signal processing module is 0, which indicates that the current flowing through the motor is in a normal range, namely the motor runs normally. The signal processing module receives the first position signal to indicate that the first receiving end of the infrared correlation unit receives the infrared ray, namely the isolating switch completes switching on. The signal processing module receives the first position signal to indicate that the second receiving end of the infrared correlation unit receives the infrared ray, namely, the isolating switch completes switching off.
Illustratively, when the digital quantity corresponding to the current signal received by the signal processing module is 1 and the first position signal is received, the signal processing module determines that the isolating switch is in fault. And when the digital quantity corresponding to the current signal received by the signal processing module is 1 and the second position signal is received, the signal processing module also judges that the isolating switch has a fault. When the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal is received, the signal processing module judges that the isolating switch is in a closing state. And when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal is received, the signal processing module judges that the isolating switch is in the opening state.
According to the disconnecting switch on-off monitoring device provided by the embodiment of the invention, the signal processing module judges whether the disconnecting switch has a fault according to the digital quantity corresponding to the received current signal, if the disconnecting switch has no fault, the on-off state of the disconnecting switch is judged according to the received first position signal or the received second position signal, the automatic monitoring of the state of the disconnecting switch is realized through the logic judgment of the signal processing module, and the effect of higher safety of the disconnecting switch is achieved.
Fig. 8 is a logic schematic diagram of a further state judgment of the disconnecting switch according to the embodiment of the present invention, fig. 9 is a logic schematic diagram of a further state judgment of the disconnecting switch according to the embodiment of the present invention, and fig. 10 is a logic schematic diagram of a further state judgment of the disconnecting switch according to the embodiment of the present invention, referring to fig. 8, fig. 9 and fig. 10, optionally, when a digital quantity corresponding to a current signal received by the signal processing module is 1, it is determined that the disconnecting switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the third position signal is received, the disconnecting switch is judged to be switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the fourth position signal is received, the disconnecting switch is judged to be switched off.
The signal processing module receives a third position signal indicating that the insulator base connected with the moving contact and collected by the magnetic field sensing unit rotates to a first preset angle, namely, the isolating switch completes switching on. And the signal processing module receives the fourth position signal to indicate that the insulator base connected with the moving contact and collected by the magnetic field induction unit rotates to a second preset angle, namely, the isolating switch completes the opening.
Illustratively, when the digital quantity corresponding to the current signal received by the signal processing module is 1 and the third position signal is received, the signal processing module determines that the isolating switch is in fault. And when the digital quantity corresponding to the current signal received by the signal processing module is 1 and the fourth position signal is received, the signal processing module also judges that the isolating switch has a fault. And when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the third position signal is received, the signal processing module judges that the isolating switch is in a closing state. And when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the fourth position signal is received, the signal processing module judges that the isolating switch is in the opening state.
According to the disconnecting switch on-off monitoring device provided by the embodiment of the invention, the signal processing module judges whether the disconnecting switch has a fault according to the digital quantity corresponding to the received current signal, if the disconnecting switch has no fault, the on-off state of the disconnecting switch is judged according to the received third position signal or the received fourth position signal, the automatic monitoring of the state of the disconnecting switch is realized through the logic judgment of the signal processing module, and the effect of higher safety of the disconnecting switch is achieved.
Fig. 11 is a logic schematic diagram of a further state judgment of the disconnecting switch according to the embodiment of the present invention, fig. 12 is a logic schematic diagram of a further state judgment of the disconnecting switch according to the embodiment of the present invention, and fig. 13 is a logic schematic diagram of a further state judgment of the disconnecting switch according to the embodiment of the present invention, referring to fig. 11, fig. 12 and fig. 13, optionally, when a digital quantity corresponding to a current signal received by the signal processing module is 1, it is determined that the disconnecting switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal and the third position signal are received, the disconnecting switch is judged to be switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal and the fourth position signal are received, the disconnecting switch is judged to be switched off.
Illustratively, when the digital quantity corresponding to the current signal received by the signal processing module is 1, the signal processing module receives any two position signals sent by the contact position acquisition module at the same time, and the signal processing module determines that the isolating switch has a fault. When the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal and the third position signal sent by the contact position acquisition module are received, the signal processing module judges that the isolating switch is in a closing state. When the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal and the fourth position signal sent by the contact position acquisition module are received, the signal processing module judges that the isolating switch is in the opening state.
According to the disconnecting switch on-off monitoring device provided by the embodiment of the invention, the signal processing module judges whether the disconnecting switch has a fault according to the digital quantity corresponding to the received current signal, if the disconnecting switch has no fault, the on-off state of the disconnecting switch is judged according to the two received position signals sent by the contact position acquisition module, and the logic judgment of the signal processing module simultaneously adopts the position signals acquired by the infrared correlation unit and the magnetic field induction unit, so that the automatic monitoring on the state of the disconnecting switch is realized, and the effect of higher safety and accuracy of the disconnecting switch is achieved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a isolator divide-shut brake monitoring devices which characterized in that includes:
the contact position acquisition module is arranged on an insulator base of the isolating switch and used for acquiring the relative positions of two contacts of the isolating switch and forming a position signal;
the current signal acquisition module is arranged on a circuit connected with a motor of the isolating switch and used for acquiring current flowing through the motor and forming a current signal, wherein the motor is used for driving a moving contact of the isolating switch to realize switching on and off;
and the signal processing module is respectively connected with the contact position acquisition module and the current signal acquisition module and is used for judging the opening and closing state of the isolating switch according to the position signal and the current signal.
2. The disconnecting switch closing and opening monitoring device according to claim 1, wherein the contact position acquisition module comprises: the infrared correlation unit comprises a transmitting end, a first receiving end and a second receiving end; the transmitting end is arranged on a base of an insulator connected with a moving contact of the isolating switch and acts along with the moving contact; the first receiving end is arranged on a base of the insulator connected with the fixed contact of the isolating switch; the second receiving end is arranged at a first position of the isolating switch base; when the isolation switch is closed, the first receiving end receives the infrared signal sent by the transmitting end, generates a first position signal and transmits the first position signal to the signal processing module; when the isolating switch is completely disconnected, the second receiving end receives the infrared signal sent by the transmitting end, generates a second position signal and transmits the second position signal to the signal processing module.
3. The disconnecting switch closing and opening monitoring device according to claim 2, wherein the contact position acquisition module comprises: the magnetic field induction unit is arranged on a base of the insulator connected with the moving contact of the isolating switch; when the base of the insulator connected with the moving contact rotates to a first preset angle, the magnetic field sensing unit generates a third position signal and transmits the third position signal to the signal processing module; when the base of the insulator connected with the moving contact rotates to a second preset angle, the magnetic field sensing unit generates a fourth position signal and transmits the fourth position signal to the signal processing module.
4. The disconnecting switch switching-on and switching-off monitoring device according to claim 3, further comprising a display device, wherein the display device is connected with the signal processing module and is used for displaying the switching-on and switching-off states of the disconnecting switch, and the switching-on and switching-off states comprise switching-on, switching-off and faults.
5. The disconnecting switch switching-closing monitoring device according to claim 4, wherein the current signal collecting module comprises a signal converting unit, the signal converting unit is used for converting the collected current signals from analog quantity to digital quantity, wherein the current signals of which the analog quantity does not exceed the set value are converted into digital quantity of 0, and the current signals of which the analog quantity exceeds the set value are converted into digital quantity of 1.
6. The disconnecting switch closing and opening monitoring device according to claim 5, wherein the magnetic field sensing unit is a Hall position sensor.
7. The disconnecting switch on-off monitoring device according to claim 5, wherein when the digital quantity corresponding to the current signal received by the signal processing module is 1, it is determined that the disconnecting switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal is received, judging that the isolating switch is switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal is received, the disconnecting switch is judged to be switched off.
8. The disconnecting switch on-off monitoring device according to claim 5, wherein when the digital quantity corresponding to the current signal received by the signal processing module is 1, it is determined that the disconnecting switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and a third position signal is received, judging that the isolating switch is switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the fourth position signal is received, the disconnecting switch is judged to be switched off.
9. The disconnecting switch on-off monitoring device according to claim 5, wherein when the digital quantity corresponding to the current signal received by the signal processing module is 1, it is determined that the disconnecting switch has a fault; when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the first position signal and the third position signal are received, judging that the isolating switch is switched on; and when the digital quantity corresponding to the current signal received by the signal processing module is 0 and the second position signal and the fourth position signal are received, the disconnecting switch is judged to be switched off.
10. The disconnecting switch closing and opening monitoring device according to any one of claims 7 to 9, further comprising: and the alarm module is connected with the signal processing module and is used for giving an alarm when the isolating switch breaks down.
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| CN113096985B (en) | 2023-03-28 |
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