CN113746067A - Protection device of GIS opening and closing coil - Google Patents
Protection device of GIS opening and closing coil Download PDFInfo
- Publication number
- CN113746067A CN113746067A CN202110996555.6A CN202110996555A CN113746067A CN 113746067 A CN113746067 A CN 113746067A CN 202110996555 A CN202110996555 A CN 202110996555A CN 113746067 A CN113746067 A CN 113746067A
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- gis
- opening
- current
- unit
- closing coil
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- 238000001514 detection method Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000306 component Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Abstract
The invention provides a protection device of a GIS opening and closing coil, which comprises a current analysis unit, a driving switch unit and a resistance unit, wherein the driving switch unit and the resistance unit are connected with the GIS opening and closing coil in series; the current analysis unit records the through-flow time of the current passing through the GIS opening and closing coil, the impedance of the resistance unit is controlled according to the through-flow time, the GIS opening and closing coil is protected, the service life of the GIS opening and closing coil is prolonged, and the safety performance of GIS equipment is improved; the driving switch unit is controlled to be switched off through the power-on time, and double protection of the GIS opening and closing coil is realized through the resistance unit and the driving switch unit; through the detection of the current value on the GIS opening and closing coil, the coil burning caused by overlarge current on the GIS opening and closing coil can be avoided.
Description
Technical Field
The invention relates to the technical field of opening and closing coil protection, in particular to a protection device for a GIS opening and closing coil.
Background
The gas insulated metal enclosed switchgear (GIS) is a switchgear in which all primary devices except a transformer in a substation are organically enclosed in a metal case through an optimized design, and gases such as SF6 are filled as arc extinguishing and insulating media. The GIS opening and closing coil is used for driving a series of actions such as the movement of the ejector rod and the like so as to complete the opening and closing actions of the circuit breaker, and is an indispensable core component in the GIS.
In the prior art, a GIS is in practical application, because the process and the quality control of the GIS opening and closing coil are lack of effective control and are influenced by different working conditions such as temperature, humidity and vibration for a long time, the GIS opening and closing coil is easy to damage due to insulation or rust and jam, so that the opening and closing current is applied to the GIS opening and closing coil for a long time. Because all GIS divide-shut brake coils are all designed according to the electrification of short time, long-term electrification must be burnt out, turn-to-turn short circuit generally can appear in the burning out process, the electric current increases, and then burns out the operation panel, seriously threatens the safe and reliable operation of GIS equipment.
Disclosure of Invention
The invention provides a protective device for a GIS opening and closing coil, which can protect the GIS opening and closing coil, reduce burning of the GIS opening and closing coil due to long-time electrification and prolong the service life of the GIS opening and closing coil.
The embodiment of the invention provides a protective device of a GIS opening and closing coil, which comprises a current analysis unit, a driving switch unit and a resistance unit, wherein the driving switch unit and the resistance unit are connected with the GIS opening and closing coil in series;
the current analysis unit is configured to:
after the driving switch unit is conducted, recording the through-current time of the current passing through the GIS opening and closing coil;
and when the through-current time is greater than a preset first time threshold, generating and outputting a first control signal to the resistance unit, and controlling the impedance state of the resistance unit to be switched from a default low impedance state to a high impedance state.
Preferably, the current analyzing unit is further configured to:
and when the through-current time is greater than a preset second time threshold, generating and outputting a second control signal to the driving switch unit to control the driving switch unit to be switched off.
Preferably, the current analyzing unit is further configured to:
after the driving switch unit is conducted, detecting the current value on the GIS opening and closing coil;
and when the current value is larger than a preset current threshold value, generating and outputting a third control signal to the driving switch unit to control the driving switch unit to be cut off.
Preferably, the driving switch unit comprises at least one switch tube assembly comprising at least one switch tube;
the current analysis unit controls the switching tube assembly to be switched off through the second control signal or the third control signal.
Preferably, the resistance unit includes a low impedance component, a high impedance component and a switching device;
the current analysis unit controls the switching device to connect the high-impedance component to the device through the first control signal.
The protection device for the GIS opening and closing coil comprises a current analysis unit, a driving switch unit and a resistance unit, wherein the driving switch unit and the resistance unit are connected with the GIS opening and closing coil in series; the current analysis unit records the through-flow time of the current passing through the GIS opening and closing coil, the impedance of the resistance unit is controlled according to the through-flow time, the GIS opening and closing coil is protected, the service life of the GIS opening and closing coil is prolonged, and the safety performance of GIS equipment is improved; the driving switch unit is controlled to be switched off through the power-on time, and double protection of the GIS opening and closing coil is realized through the resistance unit and the driving switch unit; through the detection of the current value on the GIS opening and closing coil, the coil burning caused by overlarge current on the GIS opening and closing coil can be avoided.
Drawings
Fig. 1 is a schematic structural diagram of a protection device for a GIS opening and closing coil according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a protection device for a GIS opening and closing coil, which comprises: the current analysis unit, and a driving switch unit and a resistance unit which are connected with the GIS opening and closing coil in series;
the current analysis unit is configured to:
after the driving switch unit is conducted, recording the through-current time of the current passing through the GIS opening and closing coil;
and when the through-current time exceeds a preset first time threshold, generating and outputting a first control signal to the resistance unit, and controlling the impedance state of the resistance unit to be switched from a default low impedance state to a high impedance state.
In specific implementation of the embodiment of the present invention, referring to fig. 1, the schematic structural diagram of the protection device for a GIS opening and closing coil provided in the embodiment of the present invention is shown, where the device includes a current analysis unit, a driving switch unit, and a resistance unit;
the driving switch unit and the resistance unit are connected with the GIS opening and closing coil in series and are connected to two ends of a power supply circuit of the GIS opening and closing coil;
the current analysis unit is respectively connected with the GIS opening and closing coil and the resistance unit;
the working principle of the current analysis unit is as follows:
after the driving switch unit is conducted, recording the through-current time of the current passing through the GIS opening and closing coil;
and when the through-current time exceeds a preset first time threshold, generating and outputting a first control signal to the resistance unit, and controlling the impedance state of the resistance unit to be switched from a default low impedance state to a high impedance state.
When the GIS switching-on/off coil works, the resistance unit is maintained in a low-impedance state by default, and after the driving switch unit is switched on, the GIS current analysis unit can collect the working current of the GIS switching-on/off coil and record the through-current time of the current passing through the GIS switching-on/off coil;
when the through-current time is larger than a preset first time threshold, the current analysis unit generates and outputs a first control signal to the resistance unit, the resistance unit is changed from a low-impedance state to a high-impedance state, the current for supplying power to the GIS opening and closing coil through the driving switch unit is blocked, and the GIS opening and closing coil is prevented from being burnt out due to too long power-on time.
When the through-current time is not greater than a preset first time threshold, the GIS opening and closing coil acts normally, the current analysis unit outputs a normal signal, the driving switch unit keeps a switch-on state, and the resistance unit maintains a low-impedance state.
It should be noted that the preset first time threshold may be set according to the normal opening and closing live time of the GIS opening coil, and a time threshold slightly larger than the normal live time may be set to avoid damage.
The protection device for the GIS opening and closing coil comprises a current analysis unit, a driving switch unit and a resistance unit, wherein the driving switch unit and the resistance unit are connected with the GIS opening and closing coil in series; the current analysis unit records the through-flow time of the current passing through the GIS opening and closing coil, the impedance of the resistance unit is controlled according to the through-flow time, the GIS opening and closing coil is protected, the service life of the GIS opening and closing coil is prolonged, and the safety performance of GIS equipment is improved.
In yet another embodiment provided by the present invention, the current analyzing unit is further configured to:
and when the through-current time is greater than a preset second time threshold, generating and outputting a second control signal to the driving switch unit to control the driving switch unit to be switched off.
It should be noted that the preset second time threshold may be set according to the normal opening and closing live time of the GIS opening coil, and a time threshold slightly larger than the normal live time may be set to avoid damage. The second time threshold may be set the same as or slightly greater than the first time threshold.
When the current analysis unit recognizes that the current flowing time is greater than the preset second time threshold, the current analysis unit outputs a second control signal of a fault to act on the driving switch unit, the driving switch unit becomes a cut-off state, the opening and closing circuit is cut off, and the connection between the GIS opening and closing coil and the current is thoroughly cut off.
The GIS opening and closing coil is protected by switching from a low impedance state to a high impedance state through the resistance unit to limit the current passing through the GIS opening and closing coil to an extremely low value. And when the power-on time reaches a second time threshold, the driving switch unit is controlled to be switched off, and double protection of the GIS opening and closing coil is realized through the resistance unit and the driving switch unit.
In yet another embodiment provided by the present invention, the current analyzing unit is further configured to:
after the driving switch unit is conducted, detecting the current value on the GIS opening and closing coil;
and when the current value is larger than a preset current threshold value, generating and outputting a third control signal to the driving switch unit to control the driving switch unit to be cut off.
In a specific implementation of this embodiment, after the driving switch is turned on, the current on the GIS opening and closing coil is collected, and the current value passing through the GIS opening and closing coil is detected;
and judging the current value and a preset current threshold value, and when the current value on the GIS opening and closing coil is larger than the preset current threshold value, the circuit analysis unit sends a third control signal to the drive switch unit to control the drive switch unit to be cut off.
In addition, the current analyzing unit includes: the GIS on-off switching device comprises a current acquisition component, an analysis component and a control component, wherein the current acquisition component is connected with a GIS on-off switching coil and used for acquiring current on the GIS on-off switching coil, and the analysis component is used for detecting a current value or energization time according to the current acquired by the current acquisition component, comparing the current value with a current threshold value, comparing the current value with the current threshold value and outputting a comparison result; the control component is used for generating a first control signal, a second control signal and a third control signal; the GIS opening and closing coil control current analysis and control functions can be realized through the current analysis unit.
It should be noted that the current threshold may be set according to the normal energizing current of the GIS opening coil, and a current threshold slightly larger than the normal energizing current may be set to avoid damage.
Through the detection of the current value on the GIS opening and closing coil, the coil burning caused by overlarge current on the GIS opening and closing coil can be avoided.
In yet another embodiment provided by the present invention, the driving switching unit includes at least one switching tube assembly including at least one switching tube;
the current analysis unit controls the switching tube assembly to be switched off through the second control signal or the third control signal.
In a specific implementation of this embodiment, the driving switch unit may be composed of a switch tube assembly, where the switch tube assembly at least includes a switch tube and a basic component used in cooperation with the switch tube;
the input end and the output end of the switching tube are connected with the GIS opening and closing coil in parallel, the control end of the switching tube is connected with a current analysis unit, and the current analysis unit controls the switching tube assembly to be cut off through the second control signal or the third control signal and controls the driving switching unit to be cut off;
it should be noted that the driving switch unit is a switch module with a controllable switching function;
the function of driving the switch unit is realized through the switch tube assembly, the circuit structure is simple, and the performance of the protection device is stable.
In yet another embodiment provided by the present invention, the resistance unit includes a low impedance component and a high impedance component;
the current analysis unit controls the high-impedance component to be connected into the device through the first control signal.
When the device is specifically implemented, the resistance unit is a switchable resistance unit, the interior of the resistance unit comprises a low-impedance component and a high-impedance component, the high-impedance component is controlled to be connected into the device through the current analysis unit through the first control signal, so that the impedance of the resistance unit is changed into a high-impedance state, and the GIS opening and closing coil is protected.
It should be noted that the high impedance component and the low impedance component of the resistance unit are components with certain impedance values, wherein the high impedance component can limit the current passing through the GIS opening and closing coil to be close to 0, the circuit is regarded as an open circuit, and the impedance value of the high impedance component is set, which can be specifically determined according to the magnitude of the impedance value in the circuit where the GIS opening and closing coil is located; the low impedance component can be little through the current limiting effect of GIS divide-shut brake coil, regards as the short circuit in the circuit, and the impedance value of low impedance component sets up, can specifically confirm according to the magnitude of the impedance resistance in the circuit that GIS divide-shut brake coil is located. The resistance unit can control the switching device to connect the high-impedance component into the device at a first control signal.
And the switching from the low impedance state to the high impedance state of the circuit is realized through the resistance unit, and the GIS switching-on and switching-off coil is protected.
The invention provides a protection device for a GIS opening and closing coil, which comprises a current analysis unit, a driving switch unit and a resistance unit, wherein the driving switch unit and the resistance unit are connected with the GIS opening and closing coil in series; the current analysis unit records the through-flow time of the current passing through the GIS opening and closing coil, the impedance of the resistance unit is controlled according to the through-flow time, the GIS opening and closing coil is protected, the service life of the GIS opening and closing coil is prolonged, and the safety performance of GIS equipment is improved; the driving switch unit is controlled to be switched off according to the power-on time, and double protection of the GIS opening and closing coil is realized through the resistance unit and the driving switch unit; through the detection of the current value on the GIS opening and closing coil, the coil burning caused by overlarge current on the GIS opening and closing coil can be avoided.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (5)
1. The protection device for the GIS opening and closing coil is characterized by comprising a current analysis unit, a driving switch unit and a resistance unit, wherein the driving switch unit and the resistance unit are connected with the GIS opening and closing coil in series;
the current analysis unit is configured to:
after the driving switch unit is conducted, recording the through-current time of the current passing through the GIS opening and closing coil;
and when the through-current time is greater than a preset first time threshold, generating and outputting a first control signal to the resistance unit, and controlling the impedance state of the resistance unit to be switched from a default low impedance state to a high impedance state.
2. The protection device for a GIS divide-shut brake coil of claim 1, wherein the current analysis unit is further configured to:
and when the through-current time is greater than a preset second time threshold, generating and outputting a second control signal to the driving switch unit to control the driving switch unit to be switched off.
3. The protection device for a GIS divide-shut brake coil of claim 2, wherein the current analysis unit is further configured to:
after the driving switch unit is conducted, detecting the current value on the GIS opening and closing coil;
and when the current value is larger than a preset current threshold value, generating and outputting a third control signal to the driving switch unit to control the driving switch unit to be cut off.
4. The protection device for the GIS divide-shut brake coil according to claim 3, wherein the driving switching unit comprises at least one switching tube assembly, the switching tube assembly comprising at least one switching tube;
the current analysis unit controls the switching tube assembly to be switched off through the second control signal or the third control signal.
5. The protection device for the GIS divide-shut brake coil according to claim 1, wherein the resistance unit includes a low impedance component, a high impedance component and a switching device;
the current analysis unit controls the switching device to connect the high-impedance component to the device through the first control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996555.6A CN113746067A (en) | 2021-08-27 | 2021-08-27 | Protection device of GIS opening and closing coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996555.6A CN113746067A (en) | 2021-08-27 | 2021-08-27 | Protection device of GIS opening and closing coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113746067A true CN113746067A (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110996555.6A Pending CN113746067A (en) | 2021-08-27 | 2021-08-27 | Protection device of GIS opening and closing coil |
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| Country | Link |
|---|---|
| CN (1) | CN113746067A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120013200A1 (en) * | 2010-07-16 | 2012-01-19 | Tyco Electronics Amp Gmbh | Contact protection circuit and high voltage relay comprising the same |
| CN202633076U (en) * | 2012-03-27 | 2012-12-26 | 山西省电力公司运城供电分公司 | Breaker opening/closing coil with self-protection function |
| CN103077861A (en) * | 2012-08-07 | 2013-05-01 | 厦门华电开关有限公司 | Switch equipment electrical apparatus release coil protective device |
| CN104332961A (en) * | 2014-11-04 | 2015-02-04 | 国家电网公司 | Burning proof protection device for switch opening and closing coil |
| CN108666982A (en) * | 2018-07-17 | 2018-10-16 | 国网江苏省电力有限公司徐州供电分公司 | A kind of breaker mechanism closing coil protective device and guard method |
-
2021
- 2021-08-27 CN CN202110996555.6A patent/CN113746067A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120013200A1 (en) * | 2010-07-16 | 2012-01-19 | Tyco Electronics Amp Gmbh | Contact protection circuit and high voltage relay comprising the same |
| CN202633076U (en) * | 2012-03-27 | 2012-12-26 | 山西省电力公司运城供电分公司 | Breaker opening/closing coil with self-protection function |
| CN103077861A (en) * | 2012-08-07 | 2013-05-01 | 厦门华电开关有限公司 | Switch equipment electrical apparatus release coil protective device |
| CN104332961A (en) * | 2014-11-04 | 2015-02-04 | 国家电网公司 | Burning proof protection device for switch opening and closing coil |
| CN108666982A (en) * | 2018-07-17 | 2018-10-16 | 国网江苏省电力有限公司徐州供电分公司 | A kind of breaker mechanism closing coil protective device and guard method |
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