CN111987798A - Direct current bus switch position detection system and device - Google Patents
Direct current bus switch position detection system and device Download PDFInfo
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- CN111987798A CN111987798A CN202010788788.2A CN202010788788A CN111987798A CN 111987798 A CN111987798 A CN 111987798A CN 202010788788 A CN202010788788 A CN 202010788788A CN 111987798 A CN111987798 A CN 111987798A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the 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"
- H01H9/161—Indicators for switching condition, e.g. "on" or "off" comprising light emitting elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention provides a direct current bus switch position detection system.A first section of direct current bus and a second section of direct current bus are electrically connected through a direct current bus coupler switch, one end of a high-frequency signal transceiver is electrically connected with the first section of direct current bus, the other end of the high-frequency signal transceiver is electrically connected with one end of a switching-on/off handle, and the other end of the switching-on/off handle is electrically connected with the second section of direct current bus. The direct-current bus tie switch is connected into an electric loop, so that the position of the direct-current bus tie switch is electrically and accurately reflected; the direct-current bus coupler switch is mechanically linked with the opening and closing handle without extra operation of personnel, so that the synchronization of the operation of the opening and closing handle and the on-off of a loop is realized; the position of the direct-current bus coupler switch is accurately reflected by double indication of the mechanical position and the electrical position, the problem that the position of the direct-current bus coupler switch is misjudged due to the fact that an operator is difficult to find the direct-current bus coupler switch because the opening and closing handle slips is solved, and the problem that the position of the direct-current bus coupler switch is difficult to accurately judge by the existing opening and closing handle is solved.
Description
Technical Field
The invention relates to the field of a direct current system of a transformer substation, in particular to a direct current bus switch position detection system and a direct current bus switch position detection device.
Background
At present, in a double-bus direct-current power supply system, two segments of direct-current buses normally run in a row mode, and when one segment of direct-current system is overhauled, the two segments of direct-current buses need to be continuously supplied with power in a mode of closing a direct-current bus coupler switch. If the charger and the storage battery of the section of the direct current system to be overhauled are disconnected when the bus coupler switch is not switched on in place, the section of the direct current bus is subjected to voltage loss, all loads on the bus lose power, and the serious consequences of protection refusal and switch refusal are caused. However, the position of the direct-current bus-bar switch of most of the existing substations is determined by the position indicated by the opening and closing operation handle of the direct-current bus-bar switch and the current change before and after the bus-bar switch is closed, and the method has the following problems: 1. the operating handle of the direct-current bus-bar switch can be slippery and cannot correctly reflect the real position of the switch; 2. when the load current of two sections of direct current buses approaches or the direct current load of a bus section needs to be powered off is light, the numerical values of the bus-coupled ampere meters before and after the direct current bus-coupled switch is switched on are basically zero, so that the numerical value displayed by the ampere meter can not completely and correctly reflect the position of the direct current bus-coupled switch; 3. the operating personnel need compare through the numerical value of record operation direct current bus tie switch front and back ampere meter and judge the switch position, increase work load. In conclusion, the position of the direct-current bus coupler switch is difficult to accurately judge through the existing opening and closing handle, and the judging process is not convenient enough.
In the prior art, chinese invention patent CN210957914U discloses a "rectifying dc bus switch safety device", which is published as 07.07.07.2020, and specifically discloses a rectifying cabinet safety device comprising a rectifying cabinet unit, a main control unit, a field local control unit, a remote control unit, a bus transfer switch unit, and a positive and negative bus on-off terminal connection unit, wherein the main control unit comprises an intermediate relay KA7, the intermediate relay KA7 is respectively connected with the field local control unit and the remote control unit, the field local control unit is connected with the bus transfer switch unit to control the positive and negative bus on-off, the remote control unit is connected with the bus transfer switch unit to remotely control the positive and negative bus on-off, the bus transfer switch unit is connected with a control power supply with the positive and negative bus on-off terminal connection unit, and KM1 in the positive and negative bus on-off terminal connection unit is interlocked with SQ2, KM2 interlocked with SQ1, KM3 interlocked with SQ4, KM4 interlocked with SQ 3; the on-site control unit is connected with the bus transfer switch unit to remotely control the switching-on and switching-off of the positive bus and the negative bus, so that the position is inaccurate during switching-on and switching-off, the switch position is easy to generate sliding teeth, and the position of the direct current bus switch cannot be correctly judged.
Disclosure of Invention
The invention provides a system and a device for detecting the position of a direct-current bus switch, aiming at solving the technical defect that the position of a direct-current bus switch is difficult to accurately judge by a switching-on/off handle of the existing substation direct-current system.
In order to realize the purpose, the technical scheme is as follows:
a position detection system for a direct current bus switch comprises a first section of direct current bus, a second section of direct current bus, a high-frequency signal transceiver, a direct current bus coupler switch and a switching-on/off handle; the first section of direct-current bus and the second section of direct-current bus are electrically connected through the direct-current bus coupler switch, one end of the high-frequency signal transceiver is electrically connected with the first section of direct-current bus, the other end of the high-frequency signal transceiver is electrically connected with one end of the opening and closing handle, and the other end of the opening and closing handle is electrically connected with the second section of direct-current bus.
In the scheme, the direct-current bus-coupled switch is connected to the electric loop, so that the position of the direct-current bus-coupled switch is electrically and accurately reflected; meanwhile, the direct-current bus coupler switch and the opening and closing handle are mechanically linked, and the opening and closing handle can be operated and the circuit can be switched on and off synchronously without extra operation of operators; the position of the direct-current bus coupler switch is accurately reflected by double indication of a mechanical position and an electrical position, the direct-current bus coupler switch is prevented from being difficultly found by an operator due to slipping of a switching-on/off handle, and therefore the problem that the position of the direct-current bus coupler switch is misjudged is solved, and the problem that the position of the direct-current bus coupler switch cannot be accurately judged by the conventional switching-on/off handle is solved.
The opening and closing handle comprises a handle body, a fixed seat and a rotating shaft; the handle comprises a handle body, a rotating shaft, a high-frequency signal transceiver and a second section direct current bus, wherein one end of the handle body is fixedly connected with the side face of the rotating shaft, the rotating shaft is embedded into the fixing seat, the rotating shaft is controlled by the handle body to rotate in the fixing seat, the other end of the high-frequency signal transceiver is electrically connected with the inner side of the fixing seat, and the second section direct current bus is electrically connected with the outer side.
And the opening and closing handle is provided with a pair of auxiliary contacts which are respectively arranged on the inner side of the fixed seat and the outer side of the rotating shaft, the other end of the high-frequency signal transceiver is electrically connected with one auxiliary contact, and the other auxiliary contact is electrically connected with the second section of direct current bus.
The high-frequency signal transceiver is provided with three terminals, wherein a first terminal is electrically connected with the positive electrode of the first section of direct current bus, a second terminal is electrically connected with the negative electrode of the first section of direct current bus, a third terminal is connected with one auxiliary contact, and the other auxiliary contact is electrically connected with the second section of direct current bus.
The high-frequency signal transceiver also comprises an indicator light, and the indicator light is electrically connected with the output end of the high-frequency signal transceiver.
The indicator light is a red light, and the red light is electrically connected with the first wiring terminal of the high-frequency signal transceiver.
The working voltage of the high-frequency signal transceiver is the voltage of a first section of direct current bus, and the voltage value of the high-frequency signal transceiver is 110V or 220V direct current.
In the scheme, the direct-current bus coupler switch is connected to a signal receiving and transmitting loop of a high-frequency signal transceiver, the high-frequency signal transceiver transmits a high-frequency signal, and when two sections of direct-current buses are in split operation under a normal condition, the opening and closing handle electrically disconnects the two sections of direct-current buses, so that the two sections of direct-current buses are ensured to be in split operation and cannot form a ring network through the high-frequency signal transceiver, the high-frequency signal transceiver cannot receive the high-frequency signal, and a red light of the high-frequency signal transceiver is turned off to indicate that the direct-current bus coupler switch is in a; when continuous power supply of two sections of direct current buses is required to be realized by closing the direct current bus coupler switch, if no sliding tooth occurs during switching on of the switching-on and switching-off handle, the switching on of the direct current bus coupler switch is normal, the high-frequency signal transceiver receives a high-frequency signal through the closed auxiliary contact and the direct current bus coupler switch, and a red light of the high-frequency signal transceiver sends an indication signal of successful switching on to indicate that the direct current bus coupler switch is successfully switched on; if the switch-on operation of the switch-on and switch-off handle generates tooth slipping, the direct-current bus-bar switch is still at the switch-off position actually, the high-frequency signal receiving and transmitting loop is disconnected at the direct-current bus-bar switch, the high-frequency signal transceiver cannot receive the high-frequency signal, and the red light of the high-frequency signal transceiver is extinguished, so that the actual position of the direct-current bus-bar switch is electrically and accurately reflected.
A position detection device of a direct current bus switch is applied to a position detection system of the direct current bus switch and comprises a handle body, a fixed seat and a rotating shaft; the handle comprises a handle body, a rotating shaft, a high-frequency signal transceiver and a second section direct current bus, wherein one end of the handle body is fixedly connected with the side face of the rotating shaft, the rotating shaft is embedded into the fixing seat, the rotating shaft is controlled by the handle body to rotate in the fixing seat, the other end of the high-frequency signal transceiver is electrically connected with the inner side of the fixing seat, and the second section direct current bus is electrically connected with the outer side.
The high-frequency signal transceiver is characterized by further comprising a pair of auxiliary contacts which are arranged on the inner side of the fixed seat and the outer side of the rotating shaft respectively, the other end of the high-frequency signal transceiver is electrically connected with one of the auxiliary contacts, and the other auxiliary contact is electrically connected with the second section of direct current bus.
The handle comprises a fixed seat and is characterized by further comprising a limiting part, wherein the limiting part is arranged on the inner side of the fixed seat and used for limiting the rotating angle of the handle body.
Compared with the prior art, the invention has the beneficial effects that:
according to the position detection system and device for the direct-current bus switch, the direct-current bus tie switch is connected into the electric loop, so that the position of the direct-current bus tie switch can be electrically and accurately reflected; meanwhile, the direct-current bus coupler switch and the opening and closing handle are mechanically linked, and the opening and closing handle can be operated and the circuit can be switched on and off synchronously without extra operation of operators; the position of the direct-current bus coupler switch is accurately reflected by double indication of a mechanical position and an electrical position, the direct-current bus coupler switch is prevented from being difficultly found by an operator due to slipping of a switching-on/off handle, and therefore the problem that the position of the direct-current bus coupler switch is misjudged is solved, and the problem that the position of the direct-current bus coupler switch cannot be accurately judged by the conventional switching-on/off handle is solved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention;
FIG. 3 is a diagram of the closing state of the apparatus of the present invention;
FIG. 4 is a state diagram of the device of the present invention;
description of reference numerals: 1. a handle body; 2. a fixed seat; 3. a rotating shaft; 4. and an auxiliary contact.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
the invention is further illustrated below with reference to the figures and examples.
Example 1
As shown in fig. 1, a system for detecting a position of a dc bus switch includes a first section of dc bus, a second section of dc bus, a high-frequency signal transceiver, a dc bus coupler switch, and a switching-on/off handle; the first section of direct-current bus and the second section of direct-current bus are electrically connected through the direct-current bus coupler switch, one end of the high-frequency signal transceiver is electrically connected with the first section of direct-current bus, the other end of the high-frequency signal transceiver is electrically connected with one end of the opening and closing handle, and the other end of the opening and closing handle is electrically connected with the second section of direct-current bus.
In the scheme, the direct-current bus-coupled switch is connected to the electric loop, so that the position of the direct-current bus-coupled switch is electrically and accurately reflected; meanwhile, the direct-current bus coupler switch and the opening and closing handle are mechanically linked, and the opening and closing handle can be operated and the circuit can be switched on and off synchronously without extra operation of operators; the position of the direct-current bus coupler switch is accurately reflected by double indication of a mechanical position and an electrical position, the direct-current bus coupler switch is prevented from being difficultly found by an operator due to slipping of a switching-on/off handle, and therefore the problem that the position of the direct-current bus coupler switch is misjudged is solved, and the problem that the position of the direct-current bus coupler switch cannot be accurately judged by the conventional switching-on/off handle is solved.
The opening and closing handle comprises a handle body 1, a fixed seat 2 and a rotating shaft 3; the handle comprises a handle body 1, a rotating shaft 3, a fixing seat 2, a high-frequency signal transceiver and a second section direct current bus, wherein one end of the handle body 1 is fixedly connected with the side face of the rotating shaft 3, the rotating shaft 3 is embedded into the fixing seat 2, the rotating shaft 3 is controlled to rotate in the fixing seat 2 through the handle body 1, the other end of the high-frequency signal transceiver is electrically connected with the inner side of the fixing seat, and the second section direct current bus is.
And a pair of auxiliary contacts 4 are arranged on the opening and closing handle and are respectively arranged on the inner side of the fixed seat 2 and the outer side of the rotating shaft 3, the other end of the high-frequency signal transceiver is electrically connected with one auxiliary contact 4, and the other auxiliary contact 4 is electrically connected with the second section of direct current bus.
The high-frequency signal transceiver is provided with three terminals, wherein a first terminal is electrically connected with the positive electrode of the first section of direct current bus, a second terminal is electrically connected with the negative electrode of the first section of direct current bus, a third terminal is connected with one auxiliary contact, and the other auxiliary contact is electrically connected with the second section of direct current bus.
The high-frequency signal transceiver also comprises an indicator light, and the indicator light is electrically connected with the output end of the high-frequency signal transceiver.
The indicator light is a red light, and the red light is electrically connected with the first wiring terminal of the high-frequency signal transceiver.
The working voltage of the high-frequency signal transceiver is the voltage of a first section of direct current bus, and the voltage value of the high-frequency signal transceiver is 110V or 220V direct current.
In the scheme, the direct-current bus coupler switch is connected to a signal receiving and transmitting loop of a high-frequency signal transceiver, the high-frequency signal transceiver transmits a high-frequency signal, and when two sections of direct-current buses are in split operation under a normal condition, the opening and closing handle electrically disconnects the two sections of direct-current buses, so that the two sections of direct-current buses are ensured to be in split operation and cannot form a ring network through the high-frequency signal transceiver, the high-frequency signal transceiver cannot receive the high-frequency signal, and a red light of the high-frequency signal transceiver is turned off to indicate that the direct-current bus coupler switch is in a; when continuous power supply of two sections of direct current buses is required to be realized by closing the direct current bus coupler switch, if no sliding tooth occurs during switching on of the switching-on and switching-off handle, the switching on of the direct current bus coupler switch is normal, the high-frequency signal transceiver receives a high-frequency signal through the closed auxiliary contact and the direct current bus coupler switch, and a red light of the high-frequency signal transceiver sends an indication signal of successful switching on to indicate that the direct current bus coupler switch is successfully switched on; if the switch-on operation of the switch-on and switch-off handle generates tooth slipping, the direct-current bus-bar switch is still at the switch-off position actually, the high-frequency signal receiving and transmitting loop is disconnected at the direct-current bus-bar switch, the high-frequency signal transceiver cannot receive the high-frequency signal, and the red light of the high-frequency signal transceiver is extinguished, so that the actual position of the direct-current bus-bar switch is electrically and accurately reflected.
Example 2
As shown in fig. 2, 3 and 4, a dc bus switch position detecting device applied to a dc bus switch position detecting system includes a handle body 1, a fixing base 2 and a rotating shaft 3; the handle comprises a handle body 1, a rotating shaft 3, a fixing seat 2, a high-frequency signal transceiver and a second section direct current bus, wherein one end of the handle body 1 is fixedly connected with the side face of the rotating shaft 3, the rotating shaft 3 is embedded into the fixing seat 2, the rotating shaft 3 is controlled to rotate in the fixing seat 2 through the handle body 1, the other end of the high-frequency signal transceiver is electrically connected with the inner side of the fixing seat 2, and the second section direct current bus is.
The high-frequency signal transceiver is characterized by further comprising a pair of auxiliary contacts 4 which are respectively arranged on the inner side of the fixed seat 2 and the outer side of the rotating shaft 3, the other end of the high-frequency signal transceiver is electrically connected with one of the auxiliary contacts 4, and the other auxiliary contact 4 is electrically connected with the second section of direct current bus.
The handle is characterized by further comprising a limiting part, wherein the limiting part is arranged on the inner side of the fixed seat 2 and used for limiting the rotating angle of the handle body 1.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A position detection system for a direct current bus switch is characterized by comprising a first section of direct current bus, a second section of direct current bus, a high-frequency signal transceiver, a direct current bus coupler switch and a switching-on/off handle; the first section of direct-current bus and the second section of direct-current bus are electrically connected through the direct-current bus coupler switch, one end of the high-frequency signal transceiver is electrically connected with the first section of direct-current bus, the other end of the high-frequency signal transceiver is electrically connected with one end of the opening and closing handle, and the other end of the opening and closing handle is electrically connected with the second section of direct-current bus.
2. The system for detecting the position of the direct-current bus switch according to claim 1, wherein the switching-on/off handle comprises a handle body (1), a fixed seat (2) and a rotating shaft (3); handle body (1) one end with the side fixed connection of rotation axis (3), rotation axis (3) embedding in fixing base (2), rotate in fixing base (2) through handle body (1) control rotation axis (3), the other end and the inboard electric connection of fixing base (2) of high frequency signal transceiver, second section direct current bus with rotation axis outside (3) electric connection.
3. The system for detecting the position of the direct current bus switch according to claim 2, wherein a pair of auxiliary contacts (4) are arranged on the switching-on/off handle and are respectively arranged on the inner side of the fixed seat (2) and the outer side of the rotating shaft (3), the other end of the high-frequency signal transceiver is electrically connected with one of the auxiliary contacts (4), and the other auxiliary contact (4) is electrically connected with the second section of the direct current bus.
4. The system according to claim 2, wherein the high frequency signal transceiver is provided with 3 terminals, wherein a first terminal is electrically connected to the positive pole of the first section of the dc bus, a second terminal is electrically connected to the negative pole of the first section of the dc bus, a third terminal is connected to one auxiliary contact (4), and another auxiliary contact (4) is electrically connected to the second section of the dc bus.
5. The system according to claim 3, further comprising an indicator light electrically connected to the output of the high frequency transceiver.
6. The system according to claim 4, wherein the indicator light is a red light, and the red light is electrically connected to the first terminal of the high frequency signal transceiver.
7. The system according to claim 5, wherein the operating voltage of the high frequency signal transceiver is a first segment dc bus voltage, and the voltage value of the first segment dc bus voltage is 110V or 220V dc.
8. A position detection device of a direct current bus switch is applied to the position detection system of the direct current bus switch in claim 6, and is characterized by comprising a handle body (1), a fixed seat (2) and a rotating shaft (3); handle body (1) one end with the side fixed connection of rotation axis (3), rotation axis (3) embedding in fixing base (2), rotate in fixing base (2) through handle body (1) control rotation axis (3), the other end and the inboard electric connection of fixing base (2) of high frequency signal transceiver, second section direct current bus with rotation axis outside (3) electric connection.
9. The position detecting device for the DC bus switch according to claim 8, further comprising a pair of auxiliary contacts (4) respectively disposed inside the fixing base (2) and outside the rotating shaft (3), wherein the other end of the high frequency signal transceiver is electrically connected to one of the auxiliary contacts (4), and the other of the auxiliary contacts (4) is electrically connected to the second section of the DC bus.
10. The device for detecting the position of the dc bus switch according to claim 9, further comprising a limiting member, wherein the limiting member is disposed inside the fixing base (2) and is used for limiting the rotation angle of the handle body (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010788788.2A CN111987798B (en) | 2020-08-07 | 2020-08-07 | Direct current bus switch position detection system and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010788788.2A CN111987798B (en) | 2020-08-07 | 2020-08-07 | Direct current bus switch position detection system and device |
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| CN111987798A true CN111987798A (en) | 2020-11-24 |
| CN111987798B CN111987798B (en) | 2022-03-29 |
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Cited By (1)
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| CN112394283A (en) * | 2020-12-09 | 2021-02-23 | 广东电网有限责任公司 | Detection apparatus for direct current female gang switch closing state and electric power system |
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|---|---|
| CN111987798B (en) | 2022-03-29 |
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