CN111900758A - Distributed power source voltage-loss tripping switch - Google Patents
Distributed power source voltage-loss tripping switch Download PDFInfo
- Publication number
- CN111900758A CN111900758A CN202010613726.8A CN202010613726A CN111900758A CN 111900758 A CN111900758 A CN 111900758A CN 202010613726 A CN202010613726 A CN 202010613726A CN 111900758 A CN111900758 A CN 111900758A
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- Prior art keywords
- residual current
- circuit
- controller
- gear
- control output
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a distributed power source voltage-loss tripping switch which comprises a controller, and a residual current detection circuit, a disconnection control output circuit and a reclosing control output circuit which are respectively and electrically connected with the controller. The invention can realize the characteristic of automatically determining the proper action value gear according to the change of the residual current of the circuit caused by the change of seasons, weather, and the like, when the circuit has dangerous earth fault and electric leakage, the protection device can act under the ideal action value gear, the difficulty in use and management is solved, and the residual current can automatically track and level, thereby being beneficial to greatly improving the operation rate and reliability of the residual current protection device, expanding the protection surface and improving the safety protection performance of the residual current of a power supply circuit.
Description
Technical Field
The invention relates to the technical field of electric power safety, in particular to a distributed power source voltage-loss tripping switch.
Background
At present, the popularization degree of new energy popularization and use is higher and higher in China, and the distributed power supply grid connection technology refers to technical measures for enabling a distributed power supply to be connected into a power distribution network and guaranteeing the safe and reliable operation and qualified power quality of the power distribution network containing the distributed power supply. The traditional power distribution network is a passive network which distributes power to users and enables the power to flow in a single direction, and the access of a distributed power supply enables the power distribution network to be an active network with the power flowing in a double direction, and meanwhile, the technical problems of voltage fluctuation, relay protection misoperation or failure and the like are brought. The distributed power supply access control method comprises the following steps of influence of distributed power supply access on a power distribution network, active power distribution network planning, distributed power supply grid connection protection and control, active power distribution network protection, active power distribution network voltage control, active power distribution network power quality control, distributed power supply scheduling and management and the like, and is a hotspot of power technology research.
The traditional circuit breaker applied at present can only set the residual current action protection value manually, and once the current reaches the action set value, the circuit breaker trips. The use and management are very inconvenient, and the operation rate and the reliability of the residual current protection device are not improved.
Disclosure of Invention
The invention aims to provide a distributed power source voltage-loss tripping switch to realize automatic tracking and gear setting of residual current and improve the commissioning rate and reliability of a residual current protection device.
The technical scheme of the invention is as follows:
a distributed power source voltage-loss tripping switch is characterized in that: the device comprises a controller, and a residual current detection circuit, a disconnection control output circuit and a reclosing control output circuit which are respectively electrically connected with the controller.
The residual current detection circuit detects the residual current value and transmits the residual current value to the controller.
And the disconnection control output circuit outputs a disconnection signal according to the instruction of the controller to drive the disconnection mechanism to disconnect the circuit.
And the reclosing control output circuit outputs a reclosing signal according to the instruction of the controller to drive the reclosing mechanism to be connected.
The controller sets more than 2 gear limit values, tracks the residual current value detected by the residual current detection circuit in real time, determines an adaptive gear according to the received residual current value, wherein the adaptive gear is the first gear above the residual current value, and automatically adjusts the gear or reduces the gear according to the change condition of the residual current.
Furthermore, the scheme also comprises a display circuit and a power supply, wherein the display circuit is connected with the display, and the power supply circuit provides a stable power supply.
The distributed power supply voltage-loss tripping switch provided by the technical scheme of the invention can realize the characteristic that the proper action value gear is automatically determined according to the change of the residual current of the circuit caused by the reasons of seasons, weather.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
Example 1
Fig. 1 is a schematic diagram of the system according to the embodiment, which includes a controller, and a residual current detection circuit, a disconnection control output circuit, and a reclosing control output circuit electrically connected to the controller, respectively.
The residual current detection circuit detects a residual current value and transmits the residual current value to the controller; the disconnection control output circuit outputs a disconnection signal to drive the disconnection mechanism to disconnect the circuit according to the instruction of the controller; and the reclosing control output circuit outputs a reclosing signal according to the instruction of the controller to drive the reclosing mechanism to be connected.
The controller is provided with 5 gear limit values shown below, the controller tracks the residual current value detected by the residual current detection circuit in real time, the controller determines an adaptive gear according to the received residual current value, the adaptive gear is the first gear above the residual current value, and the controller automatically adjusts the gear to be increased or reduced according to the change condition of the residual current.
take the initial actual residual current of the line as 50 mA: after the machine is started, the gear is automatically set to be I' delta n equal to 100 mA; if the residual current of the circuit suddenly increases and exceeds the action value of the 100mA gear, the circuit breaker immediately trips, and automatically recloses within 20s-60s, and the automatic tracking gear rises to the 300mA gear; after reclosing, if the residual current of the circuit continues to rise but is smaller than the action value of 300mA gear within 5s, the reclosing is successful, and the breaker is normally put into operation; after reclosing, if the residual current of the circuit continues to rise and is larger than or equal to the action value of the 300mA gear within 5s, the circuit breaker immediately trips again and is locked, and the automatic tracking gear is still in the 300mA gear; when a [ switching-off and switching-on ] key is pressed to perform switching-on operation, the circuit breaker still trips, a leakage fault is displayed, and a tracking gear is raised to 500 gears; if the tracking gear of the last circuit breaker is already at the I' delta n which is 800mA, but the residual current of the circuit exceeds the action value of the 800mA gear, the circuit breaker trips and is locked; after the fault of the circuit residual circuit needs to be eliminated, the residual current can be switched on again as long as the residual current is less than the highest-gear action value; if the tracking gear of the last circuit breaker is already at I' delta n which is 800mA, but the residual current of the circuit slowly drops, within 2min, if the residual current of the circuit does not exceed the action value of 500mA of the next gear, the gear automatically drops to 500 mA; by analogy, as long as the residual current is smaller than the action value of the 50mA gear within 2min, the gear can be reduced to the lowest gear of 50mA gear along with the continuous slow reduction of the actual residual current.
The embodiment also comprises a display circuit and a power supply, wherein the display circuit is connected with the display, and the power supply circuit provides stable power supply.
The scheme of the embodiment can realize the characteristic that the circuit residual current changes and the proper action value gear is automatically determined according to the season, weather.
Claims (2)
1. The utility model provides a distributed generator voltage-loss tripping switch which characterized in that: the automatic control circuit comprises a controller, and a residual current detection circuit, a disconnection control output circuit and a reclosing control output circuit which are respectively electrically connected with the controller; the residual current detection circuit detects a residual current value and transmits the residual current value to the controller, the disconnection control output circuit outputs a disconnection signal according to a controller instruction to drive the disconnection mechanism to disconnect the circuit, and the reclosing control output circuit outputs a reclosing signal according to the controller instruction to drive the reclosing mechanism to connect the circuit; the controller is provided with more than 2 gear limit values, the controller tracks the residual current value detected by the residual current detection circuit in real time, the controller determines an adaptive gear according to the received residual current value, the adaptive gear is the first gear above the residual current value, and the controller automatically adjusts the gear to be increased or reduced according to the change condition of the residual current.
2. The distributed power source no-voltage trip switch according to claim 1, wherein: the display device further comprises a display circuit and a power supply, wherein the display circuit is connected with the display, and the power supply circuit provides a stable power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613726.8A CN111900758A (en) | 2020-06-30 | 2020-06-30 | Distributed power source voltage-loss tripping switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010613726.8A CN111900758A (en) | 2020-06-30 | 2020-06-30 | Distributed power source voltage-loss tripping switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111900758A true CN111900758A (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010613726.8A Pending CN111900758A (en) | 2020-06-30 | 2020-06-30 | Distributed power source voltage-loss tripping switch |
Country Status (1)
| Country | Link |
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| CN (1) | CN111900758A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404611A (en) * | 2023-06-07 | 2023-07-07 | 佳源科技股份有限公司 | Leakage current protection method and leakage current protection system for photovoltaic grid-connected circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202059149U (en) * | 2011-04-18 | 2011-11-30 | 颜福随 | Power leakage protective device suitable for control circuit of recloser |
| CN204633303U (en) * | 2015-03-27 | 2015-09-09 | 湖南紫光测控有限公司 | A kind of rural power grids that are used for leak electricity intelligent coincidence arrangement for radio area |
| CN105576597A (en) * | 2016-02-29 | 2016-05-11 | 上海电机学院 | Residual current motion protection method and device |
-
2020
- 2020-06-30 CN CN202010613726.8A patent/CN111900758A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202059149U (en) * | 2011-04-18 | 2011-11-30 | 颜福随 | Power leakage protective device suitable for control circuit of recloser |
| CN204633303U (en) * | 2015-03-27 | 2015-09-09 | 湖南紫光测控有限公司 | A kind of rural power grids that are used for leak electricity intelligent coincidence arrangement for radio area |
| CN105576597A (en) * | 2016-02-29 | 2016-05-11 | 上海电机学院 | Residual current motion protection method and device |
Non-Patent Citations (1)
| Title |
|---|
| 陈君: "特种波形剩余电流动作保护装置", 《农村电气化》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404611A (en) * | 2023-06-07 | 2023-07-07 | 佳源科技股份有限公司 | Leakage current protection method and leakage current protection system for photovoltaic grid-connected circuit breaker |
| CN116404611B (en) * | 2023-06-07 | 2023-09-08 | 佳源科技股份有限公司 | Leakage current protection method and leakage current protection system for photovoltaic grid-connected circuit breaker |
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Application publication date: 20201106 |