CN113852086A - Voltage sag monitoring control system - Google Patents
Voltage sag monitoring control system Download PDFInfo
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- CN113852086A CN113852086A CN202111145323.6A CN202111145323A CN113852086A CN 113852086 A CN113852086 A CN 113852086A CN 202111145323 A CN202111145323 A CN 202111145323A CN 113852086 A CN113852086 A CN 113852086A
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- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- 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
- H02H3/20—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 voltage
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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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- Engineering & Computer Science (AREA)
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application provides a voltage sag monitoring control system, which comprises a system controller, a first quick change-over switch, a second quick change-over switch, a first transformer, a second transformer, an acquisition module and a load unit, wherein the first quick change-over switch is connected with the first transformer, the second quick change-over switch is connected with the second transformer, the first quick change-over switch and the second quick change-over switch are respectively connected with the load unit, the acquisition module is respectively connected with the first transformer, the second transformer and the load unit, the acquisition module is connected with the system controller, the first quick change-over switch is closed, and the second quick change-over switch is opened; the acquisition module is used for acquiring a first voltage value at the first transformer and a second voltage value at the second transformer in real time and transmitting the real-time voltage values to the system controller; the system controller is used for controlling the first quick change-over switch to be switched off and controlling the second quick change-over switch to be switched on when the first voltage value is detected to be lower than a preset voltage threshold value and the second voltage value is detected to be higher than a preset voltage threshold value.
Description
Technical Field
The application relates to the field of energy information networks, in particular to a voltage sag monitoring and control system.
Background
With the rapid development of high and new technologies, the capacity, voltage class and scale of a power system are continuously enlarged, power loads are diversified, and sensitive equipment represented by power electronics and switch loads is susceptible to voltage sag, so that huge economic loss is caused to industrial users.
At present, voltage sag treatment is mainly carried out from a user side, a relevant control and compensation device is adopted, the problem of power quality disturbance of a user is solved independently, and the following main problems exist in the form:
1) the system is complex, frequently interacts with the information of the power grid side device, and cannot operate independently of the power grid system;
2) the investment cost is high, and a single power user is difficult to bear;
3) efficiency and switching time cannot be considered at the same time.
Disclosure of Invention
The embodiment of the application provides a voltage sag monitoring control system to solve present voltage sag control and power grid side device information interaction frequently, can't be independent of the problem of power grid system external operation, include:
a voltage sag monitoring control system comprises a system controller, a first quick change-over switch, a second quick change-over switch, a first transformer, a second transformer, an acquisition module and a load unit, wherein the first quick change-over switch is connected with the first transformer, the second quick change-over switch is connected with the second transformer, the first quick change-over switch and the second quick change-over switch are respectively connected with the load unit, the acquisition module is respectively connected with the first transformer, the second transformer and the second load unit, the acquisition module is connected with the system controller, the first quick change-over switch is closed, and the second quick change-over switch is disconnected;
the acquisition module is used for acquiring a first voltage value at the first transformer and a second voltage value at the second transformer in real time and sending the first voltage value to the system controller;
the system controller is used for controlling the first quick change-over switch to be switched off and controlling the second quick change-over switch to be switched on when the first voltage value is detected to be lower than a preset voltage threshold value and the second voltage value is detected to be higher than the preset voltage threshold value.
Optionally, the system controller is connected to a display module, and the display module is configured to display states of the first fast switch and the second fast switch and a real-time voltage state.
Optionally, the collecting module includes a voltage transformer, a current transformer and a merging unit for transmitting signals, the voltage transformer and the current transformer are respectively connected to the first transformer and the second transformer, the voltage transformer and the current transformer are connected to the merging unit, and the merging unit is connected to the system controller.
Optionally, the system controller is respectively connected to a first switch controller and a second switch controller, the first switch controller is connected to the first fast transfer switch, and the second switch controller is connected to the second fast transfer switch;
the system controller is used for sending an opening instruction to the first switch controller and sending a closing instruction to the second switch controller when detecting that the first voltage value is lower than a preset voltage threshold and the second voltage value is higher than the preset voltage threshold;
the first switch controller is used for controlling the first quick change-over switch to be switched off when receiving the switching-off instruction;
and the second switch controller is used for controlling the second quick change-over switch to be closed when receiving the closing instruction.
Optionally, the first fast changeover switch is opened, and the second fast changeover switch is closed;
the system controller is used for controlling the first quick change-over switch to be closed and controlling the second quick change-over switch to be opened when the first voltage value is detected to be higher than a preset voltage threshold value within preset time.
Optionally, the display module comprises a mobile terminal.
Optionally, the first fast changeover switch and the second fast changeover switch are hybrid lossless switches.
Optionally, the preset time is 2 ms.
Optionally, the acquisition module is connected to the first transformer and the second transformer;
optionally, the voltage transformer is a three-phase voltage transformer, and the current transformer is a three-phase current transformer.
The application has the following advantages:
in the application, a voltage sag monitoring control system comprises a system controller, a first quick change-over switch, a second quick change-over switch, a first transformer, a second transformer, an acquisition module and a load unit, wherein the first quick change-over switch is connected with the first transformer, the second quick change-over switch is connected with the second transformer, the first quick change-over switch and the second quick change-over switch are respectively connected with the load unit, the acquisition module is respectively connected with the first transformer and the second transformer, the acquisition module is connected with the system controller, the first quick change-over switch is closed, and the second quick change-over switch is opened; the acquisition module is used for acquiring a first voltage value at a first transformer and a second voltage value at a second transformer in real time and sending the first voltage value and the second voltage value to the system controller; the system controller is used for controlling the first quick change-over switch to be switched off and controlling the second quick change-over switch to be switched on when the first voltage value is detected to be lower than a preset voltage threshold value and the second voltage value is detected to be higher than the preset voltage threshold value. The system is independent of a power grid system to operate; the power supply is switched quickly, so that the loss of a user is reduced; the sag amplitude and the sag duration are customized to deal with customers with different sensitivity levels.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a voltage sag monitoring and controlling system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another voltage sag monitoring and control system according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.
Referring to fig. 1, a schematic structural diagram of a voltage sag monitoring control system shown in the present application is shown, including a system controller, a first fast transfer switch, a second fast transfer switch, a first transformer, a second transformer, an acquisition module, and a load unit, where the first fast transfer switch is connected to the first transformer, the second fast transfer switch is connected to the second transformer, the first fast transfer switch and the second fast transfer switch are respectively connected to the load unit, the acquisition module is respectively connected to the first transformer and the second transformer, the acquisition module is connected to the system controller, the first fast transfer switch is closed, and the second fast transfer switch is open;
the acquisition module is used for acquiring a first voltage value at the first transformer and a second voltage value at the second transformer in real time and sending the first voltage value and the second voltage value to the system controller;
the system controller is used for controlling the first quick change-over switch to be switched off and controlling the second quick change-over switch to be switched on when the first voltage value is detected to be lower than a preset voltage threshold value and the second voltage value is detected to be higher than the preset voltage threshold value.
The voltage sag monitoring and control system is an independent system, information interaction with a power grid side device is not needed, and the system is simple and independent of the power grid system to operate.
In this application, the collection module includes voltage transformer, current transformer and transmission signal's merging cells, voltage transformer and current transformer connect respectively first transformer and second transformer, voltage transformer and current transformer connect the merging cells, the merging cells is connected the system controller.
The voltage transformer has two windings, both of which are mounted or wound on a core. Insulation is arranged between the two windings and between the windings and the iron core, so that the two windings and between the windings and the iron core are electrically isolated. When the voltage transformer operates, the primary winding is connected on a line in parallel, and the secondary winding is connected with an instrument or a relay in parallel. Therefore, when measuring the voltage on the high-voltage line, although the primary voltage is high, the secondary voltage is low, and the safety of operators and instruments can be ensured.
The current transformer consists of a closed iron core and a winding. The primary winding of the current transformer has few turns and is connected in series with a circuit of current to be measured, so that all current of the circuit always flows through the primary winding, the turns of the secondary winding are more and are connected in series with a measuring instrument and a protection loop, the secondary loop is always closed when the current transformer works, the impedance of the series coil of the measuring instrument and the protection loop is very small, and the working state of the current transformer is close to a short circuit.
Referring to fig. 2, the system controller is respectively connected to a first switch controller and a second switch controller, the first switch controller is connected to the first fast transfer switch, and the second switch controller is connected to the second fast transfer switch;
the system controller is used for sending an opening instruction to the first switch controller and sending a closing instruction to the second switch controller when detecting that the first voltage value is lower than a preset voltage threshold and the second voltage value is higher than the preset voltage threshold;
the first switch controller is used for controlling the first quick change-over switch to be switched off when receiving the switching-off instruction;
and the second switch controller is used for controlling the second quick change-over switch to be closed when receiving the closing instruction.
In the application, the system controller is connected with a display module, and the display module is used for displaying the states and the real-time voltage states of the first quick change-over switch and the second quick change-over switch.
In the present application, the first fast transfer switch is open and the second fast transfer switch is closed;
the system controller is used for controlling the first quick change-over switch to be closed and controlling the second quick change-over switch to be opened when the first voltage value is detected to be higher than a preset voltage threshold value within preset time.
Wherein the preset time is 2 ms.
In the application, the display module comprises a mobile terminal, and the mobile terminal can be a mobile phone, a computer and a tablet. As an example, the display module may also be a display.
In this application, the first fast transfer switch and the second fast transfer switch are hybrid lossless switches. The hybrid lossless switch is a direct current switch consisting of a thyristor device, a traditional mechanical switch and an energy consumption device. The principle is as follows: when the direct current system normally operates, current only passes through the traditional mechanical switch, and when a fault occurs, the mechanical switch quickly converts the fault current into a thyristor device to realize current cut-off. The hybrid lossless switch fully utilizes the advantages of a mechanical switch and a solid-state direct-current switch, and has the characteristics of low running loss, short breaking time, high reliability, good stability and the like. However, the hybrid direct current switch is in the structural design and prototype trial-manufacturing stage at present, and has no engineering application yet.
In the application, the acquisition module is connected with the first transformer and the second transformer;
in the present application, the voltage transformer is a three-phase voltage transformer and the current transformer is a three-phase current transformer.
In the application, a voltage sag monitoring control system comprises a system controller, a first quick change-over switch, a second quick change-over switch, a first transformer, a second transformer, an acquisition module and a load unit, wherein the first quick change-over switch is connected with the first transformer, the second quick change-over switch is connected with the second transformer, the first quick change-over switch and the second quick change-over switch are respectively connected with the load unit, the acquisition module is respectively connected with the first transformer and the second transformer, the acquisition module is connected with the system controller, the first quick change-over switch is closed, and the second quick change-over switch is opened; the acquisition module is used for acquiring a first voltage value at a first transformer and a second voltage value at a second transformer in real time and sending the first voltage value and the second voltage value to the system controller; the system controller is used for controlling the first quick change-over switch to be switched off and controlling the second quick change-over switch to be switched on when the first voltage value is detected to be lower than a preset voltage threshold value and the second voltage value is detected to be higher than the preset voltage threshold value. The system is independent of a power grid system to operate; the power supply is switched quickly, so that the loss of a user is reduced; the sag amplitude and the sag duration are customized to deal with customers with different sensitivity levels.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The voltage sag monitoring and control system provided by the present application is introduced in detail above, and a specific example is applied in the present application to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A voltage sag monitoring control system is characterized by comprising a system controller, a first quick change-over switch, a second quick change-over switch, a first transformer, a second transformer, an acquisition module and a load unit, wherein the first quick change-over switch is connected with the first transformer, the second quick change-over switch is connected with the second transformer, the first quick change-over switch and the second quick change-over switch are respectively connected with the load unit, the acquisition module is respectively connected with the first quick change-over switch and the second quick change-over switch, the acquisition module is connected with the system controller, the first quick change-over switch is closed, and the second quick change-over switch is open;
the acquisition module is used for acquiring a first voltage value at the first transformer and a second voltage value at the second transformer in real time and transmitting the first voltage value and the second voltage value to the system controller;
the system controller is used for controlling the first quick change-over switch to be switched off and controlling the second quick change-over switch to be switched on when the first voltage value is detected to be lower than a preset voltage threshold value and the second voltage value is detected to be higher than the preset voltage threshold value.
2. The voltage sag monitoring and control system according to claim 1, wherein the system controller is connected to a display module, and the display module is configured to display the states of the first fast switch and the second fast switch and a real-time voltage state.
3. The voltage sag monitoring and control system according to claim 1, wherein the collection module comprises a voltage transformer, a current transformer and a merging unit for transmitting signals, the voltage transformer and the current transformer are respectively connected to the first transformer, the second transformer and the load unit, the voltage transformer and the current transformer are connected to the merging unit, and the merging unit is connected to the system controller.
4. The voltage sag monitoring and control system according to claim 1, wherein the system controller is connected to a first switch controller and a second switch controller, respectively, the first switch controller is connected to the first fast transfer switch, and the second switch controller is connected to the second fast transfer switch;
the system controller is used for sending an opening instruction to the first switch controller and sending a closing instruction to the second switch controller when detecting that the first voltage value is lower than a preset voltage threshold and the second voltage value is higher than the preset voltage threshold;
the first switch controller is used for controlling the first quick change-over switch to be switched off when receiving the switching-off instruction;
and the second switch controller is used for controlling the second quick change-over switch to be closed when receiving the closing instruction.
5. The voltage sag monitoring and control system according to claim 1, wherein the first fast transfer switch is open and the second fast transfer switch is closed;
the system controller is used for controlling the first quick change-over switch to be closed and controlling the second quick change-over switch to be opened when the first voltage value is detected to be higher than a preset voltage threshold value within preset time.
6. The voltage sag monitoring and control system according to claim 2, wherein the display module comprises a mobile terminal.
7. The voltage sag monitoring and control system according to claim 1, wherein the first fast switch and the second fast switch are hybrid lossless switches.
8. The voltage sag monitoring and control system according to claim 5, wherein the preset time is 2 ms.
9. The voltage sag monitoring and control system according to claim 1, wherein the collection module is connected to the first transformer and the second transformer;
the acquisition module is used for acquiring a first voltage value at the first transformer and a second voltage value at the second transformer and sending the first voltage value and the second voltage value to the system controller.
10. The voltage sag monitoring and control system according to claim 3, wherein the voltage transformer is a three-phase voltage transformer and the current transformer is a three-phase current transformer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111145323.6A CN113852086A (en) | 2021-09-28 | 2021-09-28 | Voltage sag monitoring control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111145323.6A CN113852086A (en) | 2021-09-28 | 2021-09-28 | Voltage sag monitoring control system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208127986U (en) * | 2018-05-24 | 2018-11-20 | 山东铁雄冶金科技有限公司 | Gas-blowing engine power supply system |
| CN109193559A (en) * | 2018-10-30 | 2019-01-11 | 广州供电局有限公司 | Power supply fast switching system, method for handover control and device |
| CN208984136U (en) * | 2018-11-21 | 2019-06-14 | 国网青海省电力公司西宁供电公司 | Substation parameters acquisition device and system |
| CN110601351A (en) * | 2019-09-25 | 2019-12-20 | 华北电力大学 | Dual-power seamless switching device and method |
-
2021
- 2021-09-28 CN CN202111145323.6A patent/CN113852086A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208127986U (en) * | 2018-05-24 | 2018-11-20 | 山东铁雄冶金科技有限公司 | Gas-blowing engine power supply system |
| CN109193559A (en) * | 2018-10-30 | 2019-01-11 | 广州供电局有限公司 | Power supply fast switching system, method for handover control and device |
| CN208984136U (en) * | 2018-11-21 | 2019-06-14 | 国网青海省电力公司西宁供电公司 | Substation parameters acquisition device and system |
| CN110601351A (en) * | 2019-09-25 | 2019-12-20 | 华北电力大学 | Dual-power seamless switching device and method |
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