CN217824245U - Inverter switch control system and inverter system - Google Patents
Inverter switch control system and inverter system Download PDFInfo
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- CN217824245U CN217824245U CN202221247460.0U CN202221247460U CN217824245U CN 217824245 U CN217824245 U CN 217824245U CN 202221247460 U CN202221247460 U CN 202221247460U CN 217824245 U CN217824245 U CN 217824245U
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Abstract
The utility model discloses an inverter switch control system and inverter system. The inverter switch control system includes: the alternating current switch is arranged on the output side of the inverter and is used for controlling the connection or disconnection of the output side of the inverter; the electric parameter detection unit is arranged on the output side of the inverter and used for detecting the electric parameters on the output side of the inverter; the first control unit is connected with the detection output end of the electrical parameter detection unit and the control end of the alternating current switch, and is used for receiving the detection signal output by the electrical parameter detection unit and outputting a switch on-off signal to the alternating current switch; and the second control unit is connected with the detection output end of the electrical parameter detection unit and used for receiving the detection signal output by the electrical parameter detection unit and executing preset operation. The inverter switch control system can reduce the use number of devices, reduce the cost and simplify the structure while ensuring the requirements of fault protection, parameter measurement display and the like are met.
Description
Technical Field
The utility model relates to an inverter technical field especially relates to an inverter switch control system and inverter system.
Background
Circuit protection devices, such as protection switches, are usually provided on the output side of the inverter, for example between the inverter and the grid, in order to open the circuit in time for protecting the components in the event of a line fault. The protection switch is usually integrated with a detection sensor for electrical parameters such as voltage, current and the like, and is mainly used for controlling the module to control the switch to be switched off to protect a circuit when the electrical parameters are detected to be abnormal.
However, when there is a measurement or metering requirement for the line, a detection sensor and a controller are usually added outside the switch to meet the measurement and metering requirements. However, the sensors of voltage, current, etc. are expensive, the use of two sensors will increase the cost, and the circuit design and the line connection are complicated, and the operation is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model provides an inverter switch control system and inverter system to the realization reduces the use quantity of device when guaranteeing to satisfy demands such as fault protection, parameter measurement, and reduce cost simplifies the structure.
According to an aspect of the present invention, there is provided an inverter switch control system, including:
the alternating current switch is arranged on the output side of the inverter and is used for controlling the connection or disconnection of the output side of the inverter;
the electric parameter detection unit is arranged on the output side of the inverter and used for detecting the electric parameters on the output side of the inverter;
the first control unit is connected with the detection output end of the electrical parameter detection unit and the control end of the alternating current switch, and is used for receiving the detection signal output by the electrical parameter detection unit and outputting a switch on-off signal to the alternating current switch;
and the second control unit is connected with the detection output end of the electrical parameter detection unit and used for receiving the detection signal output by the electrical parameter detection unit and executing preset operation.
Optionally, the ac switch and the first control unit are integrated.
Optionally, the electrical parameter detection unit is arranged inside the integrated structure;
the detection output end of the electrical parameter detection unit is the signal output end of the integrated structure, and the signal output end of the integrated structure is connected with the second control unit.
Optionally, the electrical parameter detection unit and the second control unit are disposed outside the integrated structure;
the input end of the first control unit is the signal input end of the integrated structure, and the signal input end of the integrated structure is connected with the detection output end of the electrical parameter detection unit.
Optionally, the electrical parameter detection unit and the second control unit are disposed outside the integrated structure; the input end of the first control unit is a signal input end of the integrated structure, and the signal input end of the integrated structure is connected with the second control unit; the second control unit is used for outputting the switch on-off signal to the first control unit.
Optionally, the electrical parameter detection unit includes at least one of a current detection element and a voltage detection element.
Optionally, the current detecting element is a current transformer, and the voltage detecting element is a voltage transformer.
Optionally, the preset operation comprises displaying a voltage parameter and/or a current parameter of the inverter output side.
Optionally, the ac switch is a circuit breaker switch.
According to another aspect of the present invention, there is provided an inverter system comprising an inverter and an inverter switch control system as described in the first aspect, the inverter switch control system being provided in the inverter output side.
The utility model discloses technical scheme provides an inverter switch control system and inverter system, and this inverter switch control system includes: the device comprises an alternating current switch, an electrical parameter detection unit, a first control unit and a second control unit. The inverter switch control system receives the detection signal output by the electrical parameter detection unit through the first control unit, outputs a switch on-off signal to the alternating current switch, realizes fault protection on the inverter, receives the detection signal output by the electrical parameter detection unit through the second control unit, executes preset operation, and realizes the operations of measurement, metering, display and the like of electrical parameters. Therefore, compared with the prior art, the first control unit and the second control unit share one electric parameter detection unit, the fault protection can be met, the requirements of presetting operation and the like can be met, the number of used parameter detection devices can be reduced due to the fact that only one electric parameter detection unit is used, cost is reduced, the structure is simplified, operation is convenient, and use convenience is improved.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will be readily apparent from the following specification.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of an inverter switch control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an inverter switch control system in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another inverter switch control system in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another inverter switch control system in an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a block diagram of an inverter switch control system provided in an embodiment of the present invention. Referring to fig. 1, the inverter switching control system includes: an ac switch 20 provided on the output side of the inverter 10 and configured to control connection or disconnection of the output side of the inverter 10; an electrical parameter detection unit 40 disposed on the output side of the inverter 10, for detecting an electrical parameter on the output side of the inverter 10; the first control unit 50 is connected with the detection output end B0 of the electrical parameter detection unit 40 and the control end A2 of the alternating current switch 20, and is used for receiving the detection signal output by the electrical parameter detection unit 40 and outputting a switch on-off signal to the alternating current switch 20; and a second control unit 60 connected to the detection output terminal B0 of the electrical parameter detection unit 40, for receiving the detection signal output by the electrical parameter detection unit 40 and performing a preset operation.
The ac switch 20 may be a breaker switch, a relay switch, an ac contactor, or the like. The output side of the inverter can be connected with a power grid or a load. For example, taking the inverter output side as an example of being connected to the grid 30, the ac switch 20 may be connected in series between the inverter 10 and the grid 30 for controlling the connection or disconnection of the inverter 10 and the grid 30. The electrical parameter detecting unit 40 may be connected to the strong power terminal A1 of the ac switch 20, and is configured to detect an electrical parameter on the output side or the input side of the ac switch 20.
The strong current terminal A1 may be used as an output terminal or an input terminal, and may be specifically set according to an actual situation, which is not specifically limited herein.
In the following embodiments, the inverter output side is connected to the grid 30, and the ac switch 20 is connected in series between the inverter 10 and the grid 30.
The first control unit 50 and the second control unit 60 may be control chips such as a single chip microcomputer and a PLC controller. The types and types of chips of the first control unit 50 and the second control unit 60 may be the same or different, and may be set according to actual situations, which is not specifically limited herein.
The detection output terminal B0 of the electrical parameter detection unit 40 may have only one port or a plurality of ports. Illustratively, the electrical parameter detecting unit is provided with a plurality of output port interfaces for connecting with the first control unit 50, the second control unit 60, and the like, and the number of the output port interfaces can be set according to actual situations. And is not particularly limited herein.
The electrical parameter detecting unit 40 is connected to the strong power terminal A1 of the ac switch 20, and is configured to detect and obtain an electrical parameter of the ac switch 20, that is, an electrical parameter of the output side of the inverter in real time, and send the electrical parameter to the first control unit 50 and the second control unit 60. The first control unit 50 receives the detection signal output by the electrical parameter detection unit 40, and outputs a switch on-off signal to the ac switch 20 to control the on-off of the ac switch 20, so as to control the connection or disconnection of the inverter 10 and the power grid 30; the second control unit 60 receives the detection signal output from the electrical parameter detection unit 40 and performs a preset operation according to the detection signal. The electrical parameter of the ac switch 20 may be a current parameter, a voltage parameter, a power parameter, and the like, and may be specifically set according to an actual situation, which is not specifically limited herein. The preset operation can be display of an electrical parameter, accurate measurement and metering of the electrical parameter and the like. For example, if the preset operation is the display of the electrical parameter, the second control unit 60 receives the detection signal output by the electrical parameter detection unit 40 and displays the detection signal.
The first control unit 50 receives the detection signal output by the electrical parameter detection unit 40, and outputs a switch on/off signal to the ac switch 20, which may be as follows: and comparing the received detection signal with a preset condition stored in the control unit in advance, outputting a switch off signal to control the AC switch 20 to be switched off if the condition is met, and otherwise outputting a switch on signal to control the AC switch 20 to be switched on. Wherein the setting of the preset condition is related to the electrical parameter. For example, if the electrical parameter is a current parameter, the preset condition may be a preset current value, and if the detected current parameter is greater than the preset current value, which indicates that the current between the inverter 10 and the grid 30 is too large and the line is easily burned out, the first control unit controls the ac switch 20 to be turned off, so that the path between the inverter 10 and the grid 30 is cut off to protect the line. When the detected current parameter is smaller than the preset current value, it indicates that the current value between the inverter 10 and the grid 30 is a normal range value, and the line is safe, the first control unit 50 controls the ac switch 20 to be turned on or continuously turned on, so as to ensure power transmission between the inverter 10 and the grid 30.
In the technical solution of this embodiment, the implementation process of the inverter switch control system is as follows: referring to fig. 1, an ac switch 20 is connected in series between an inverter 10 and a power grid 30, an electrical parameter detection unit 40 is connected to a strong power terminal A1 of the ac switch 20, a first control unit 50 is connected to a detection output terminal B0 of the electrical parameter detection unit 40 and a control terminal A2 of the ac switch 20, respectively, and a second control unit 60 is connected to a detection output terminal B0 of the electrical parameter detection unit 40. Under normal operation, the ac switch 20 is in a conducting state, i.e. the inverter 10 is connected to the grid 30, and the electrical parameter detecting unit 40 detects the electrical parameter at the output side of the inverter in real time and sends the electrical parameter to the first control unit 50 and the second control unit 60. The first control unit 50 outputs a switch on/off signal to control the on/off of the ac switch 20 according to the received electrical parameter detection signal. When the electrical parameter detection signal meets the preset condition, which indicates that the line is unsafe, the ac switch 20 is controlled to be turned off, so as to control the passage between the inverter 10 and the power grid 30 to be turned off, thereby protecting the line safety. Otherwise, indicating line safety, the ac switch 20 is controlled to remain in a conductive state to ensure power transmission between the inverter 10 and the grid 30. The second control unit 60 performs a preset operation according to the received detection signal to implement a preset operation, such as measurement, metering, display, and the like of an electrical parameter. Thus, the fault protection of the inverter 10 is realized by setting the first control unit 50 to control the on or off of the ac switch 20 according to the detection signal of the electrical parameter detection unit 40, and the preset operation is performed by the second control unit 60 according to the detection signal of the electrical parameter detection unit 40. Compared with the prior art, the embodiment can realize fault protection and meet the requirements of preset operation and the like by sharing the first control unit 50 and the second control unit 60 by using the electric parameter detection unit 40, and can reduce the use number of parameter detection devices, reduce the cost, simplify the structure, facilitate the operation and improve the use convenience by using only one electric parameter detection unit.
In the above embodiments, the electrical parameter detection unit 40 may be a high-precision detection element or a normal-precision detection element. Specifically, the first control unit 50 and the second control unit 60 are different in roles due to the use of the electrical parameter, the accuracy requirement, and the like by the user. The first control unit 50 is mainly used for protecting the safety of the inverter, the grid, and the line between the inverter and the grid, and the like, and directly compares the detected electric parameters with preset conditions. Therefore, the requirement of the first control unit 50 on the detection accuracy of the electrical parameter detection unit 40 is not high, that is, the electrical parameter detection unit 40 can realize the fault protection function by using a detection element with high accuracy or ordinary accuracy. For example, the first control unit 50 may compare the detected electrical parameter with a preset electrical parameter stored inside the first control unit 50 directly according to the detected electrical parameter (both the detected parameter with high accuracy and the detected parameter with low accuracy). And when the detected electric parameter is larger than the preset electric parameter, sending a turn-off signal to the alternating current switch 20, and controlling the alternating current switch 20 to be turned off so as to disconnect the passage of the inverter 10 and the power grid 30, thereby protecting the safety of the inverter, the power grid and the lines of the inverter and the power grid. While the second control unit 60 is mainly used for measuring, metering and numerical display of electrical parameters. The accuracy requirements for the electrical parameters are typically high for these applications. When the electrical parameter detection unit 40 is a high-precision detection element, the second control unit 60 may be used for operations such as measurement and display directly based on the detected electrical parameter (in this case, a high-precision value). However, when the electrical parameter detecting unit 40 is a detecting element with normal accuracy, the second control unit 60 may increase the accuracy of the detected electrical parameter (in this case, a low accuracy value or a normal accuracy value) by a software method designed in advance in the control unit, and then perform operations such as metering and displaying. For example, a preset precision or a preset precision range is set in the second control unit 60 in advance, the difference between the acquired detection parameter and the preset precision or the preset precision range is compared to obtain a difference, and then the difference is added on the basis of the detection parameter to correct the precision of the electrical parameter. In other words, the difference between the accuracy of the detected parameter and the preset accuracy is compensated, so as to improve the accuracy of the electrical parameter.
It should be noted that, in the embodiments of the present invention, the connection mode between the structures may be electrical connection or communication connection. For example, the electrical parameter detection unit 40 may be electrically connected to the first control unit 50, the first control unit 50 may be electrically connected to the ac switch 20, the electrical parameter detection unit 40 may be electrically connected to the second control unit 60 by a wire harness, or may be connected to the first control unit by wired communication or wireless communication. The specific setting can be set according to actual conditions, and is not specifically limited herein.
In a technical solution of this embodiment, an inverter switch control system is provided, including: the device comprises an alternating current switch, an electrical parameter detection unit, a first control unit and a second control unit. The inverter switch control system receives the detection signal output by the electrical parameter detection unit through the first control unit and outputs a switch on-off signal to the alternating current switch, so that fault protection of the inverter is realized, the detection signal output by the electrical parameter detection unit is received through the second control unit, preset operation is executed, and the operations of measurement, metering, display and the like of electrical parameters are realized. Therefore, compared with the prior art, the first control unit and the second control unit share one electrical parameter detection unit, so that the fault protection can be met, and the requirements of preset operation and the like can be met. And only one electrical parameter detection unit is used, so that the number of used parameter detection devices can be reduced, the cost is reduced, the structure is simplified, the operation is convenient, and the use convenience is improved.
In the above embodiments, the electrical parameter detection unit, the first control unit and the second control unit may be integrated in various manners, and some of them will be described below, but the present invention is not limited thereto.
Fig. 2 is a schematic structural diagram of an inverter switch control system provided in an embodiment of the present invention. Alternatively, referring to fig. 2, the ac switch 20 and the first control unit 50 are an integrated structure 100.
The ac switch 20 and the first control unit 50 are integrated together to form an integrated structure 100 shown in fig. 2, which is used for implementing line protection, fault protection, and the like for the inverter 10 and the grid 30. The integrated structure 100 can be a unitary product, which is convenient for production, manufacture, operation, etc.
Wherein, referring to fig. 2, the ac switch comprises two strong electrical terminals. A strong power terminal A1 shown in FIG. 2, connected to the power grid 30; the other high-voltage terminal A3 is connected to the inverter 10.
As an embodiment, optionally, with continued reference to fig. 2, the electrical parameter detection unit 40 and the second control unit 60 are disposed outside the integrated structure 100. The input end C1 of the first control unit 50 is a signal input end of the integrated structure 100, and the signal input end of the integrated structure 100 is connected to the detection output end B0 of the electrical parameter detection unit 40.
Wherein, the electrical parameter detection unit 40 outputs the detection results to the signal input terminal of the integrated structure 100 and the second control unit 60, respectively. Since the first control unit 50 is integrated inside the integrated structure 100, the input terminal C1 of the first control unit 50 is a signal input terminal of the integrated structure 100. Therefore, the first control unit 50 may control the ac switch 20 to be turned on or off according to the detection result to control the inverter 10 to be turned on or off from the grid 30, so as to implement line protection.
Specifically, when it is required to implement fault protection between the inverter 10 and the power grid 30, the integrated structure 100 integrated with the ac switch 20 and the first control unit 50 may be directly disposed between the inverter 10 and the power grid 30, an electrical parameter detection unit 40 may be disposed outside the integrated structure 100 to detect an electrical parameter on the ac side of the ac switch 20 and send the electrical parameter to the first control unit 50 inside the integrated structure 100, and the first control unit 50 controls on/off of the ac switch 20 according to a detection result to control connection or disconnection between the inverter 10 and the power grid 30, so as to implement fault protection. Further, when a preset operation is required to be performed, for example, accurate display, measurement and the like of an electrical parameter value, since the preset operation generally requires high accuracy for detecting the electrical parameter, the first control unit 50 is integrated inside the integrated structure 100, and operations such as internal wiring and debugging are inconvenient and easy to damage the integrated structure, the second control unit 60 is disposed outside the integrated structure 100. The second control unit 60 is electrically connected to the electrical parameter detecting unit 40, and is configured to receive the detection result and perform a preset operation according to the detection result. Specifically, when the electrical parameter detection unit 40 is a high-precision detection element, the second control unit 60 directly uses the detection result to perform a preset operation; when the electrical parameter detecting unit 40 is a low-precision or common-precision detecting element, the precision of the electrical parameter can be improved by setting a software method in the second control unit, and then the preset operation can be performed. Compared with the prior art, can realize: through sharing an electrical parameter detecting unit with first the control unit and second the control unit, realize satisfying fault protection, can satisfy needs such as predetermineeing the operation again, and owing to only using an electrical parameter detecting unit, can reduce the use quantity of parameter detection device, reduce cost simplifies the structure, and convenient operation improves the convenience of using.
The embodiment can be applied to occasions requiring low use frequency for the preset operation. For example, when performing conventional fault protection, the safety protection of the line can be realized by a simple wire harness connection directly through the integrated structure 100 product integrated with the ac switch 20 and the first control unit 50 and the electrical parameter detection unit 40, the line structure is simple, the operation and the use are convenient, and the improvement of the detection efficiency is facilitated. When there is a preset operation demand, the preset operation can be realized without affecting the fail-safe function by merely connecting the second control unit 60 through a simple harness. The advantages of such an arrangement are: the circuit structure is simple, convenient operation, and flexibility and practicality are stronger, are favorable to improving detection efficiency, and compare with prior art, through with an electrical parameter detecting element of first the control unit and second the control unit sharing, realize that can satisfy fault protection, can satisfy needs such as predetermineeing the operation again, and owing to only use an electrical parameter detecting element, can reduce the use quantity of parameter detection device, reduce cost simplifies the structure, and convenient operation improves the convenience of using.
Fig. 3 is a schematic structural diagram of another inverter switch control system provided in an embodiment of the present invention. As an embodiment, optionally, referring to fig. 3, the second control unit 60 is further connected to an input terminal C1 of the first control unit 50, the input terminal C1 of the first control unit 50 is a signal input terminal of the integrated structure 100; the second control unit 60 is further configured to output a switch on/off signal to the first control unit 50 according to the detection result.
When the second control unit 60 outputs a switch off signal to the first control unit 50, the first control unit 50 may control the ac switch 20 to be turned off according to the switch off signal, so as to control the inverter 10 to be disconnected from the grid 30. When the second control unit 60 outputs the switch-on signal to the first control unit 50, the first control unit 50 may control the ac switch 20 to be turned on according to the switch-on signal to control the inverter 10 to be connected to the grid 30. In other words, the fault protection for the line may be: in one implementation, the first control unit 50 directly controls the on or off of the ac switch 20 according to the detection result. In another implementation manner, the second control unit 60 sends a switch on/off signal to the first control unit 50 to indirectly control the on/off of the ac switch 20 according to the detection result. The two modes can be used independently, and can also be used simultaneously so as to form a check and redundancy design and the like, thereby improving the reliability of control and further ensuring the safety of the line.
Fig. 4 is a schematic structural diagram of another inverter switch control system provided in the embodiment of the present invention. As an embodiment, optionally, with reference to fig. 4, the electrical parameter detection unit 40 is arranged inside the integrated structure 100. The detection output end B0 of the electrical parameter detection unit 40 is a signal output end of the integrated structure 100, and the signal output end of the integrated structure 100 is connected to the second control unit 60.
Illustratively, referring to fig. 4, the electrical parameter detecting unit 40 is disposed inside the integrated structure 100, and the integrated structure 100 is integrated with the ac switch 20 and the first control unit 50, so as to be a unitary product, which is convenient for production, manufacture, operation, and the like.
Specifically, when fault protection between the inverter 10 and the grid 30 needs to be realized, the integrated structure 100 integrated with the electrical parameter detection unit 40, the ac switch 20, and the first control unit 50 may be directly disposed between the inverter 10 and the grid 30, and after power is turned on, line fault protection may be directly performed. Compared with the embodiment, the detection device is simpler to operate, more convenient to use and beneficial to improving the detection efficiency. Further, when a preset operation is required to be performed, for example, accurate display, measurement and the like of an electrical parameter value, since the preset operation generally requires high accuracy for detecting the electrical parameter, the first control unit 50 is integrated inside the integrated structure 100, and operations such as internal wiring and debugging are inconvenient and easy to damage the integrated structure, the second control unit 60 is disposed outside the integrated structure 100. The second control unit 60 is electrically connected to the electrical parameter detecting unit 40, and is configured to receive the detection result and perform a preset operation according to the detection result. Specifically, when the electrical parameter detecting unit 40 is a high-precision detecting element, the second control unit 60 directly uses the detection result to perform the preset operation. When the electrical parameter detecting unit 40 is a low-precision or common-precision detecting element, the precision of the electrical parameter can be improved by setting a software method in the second control unit, and then the preset operation can be performed. Compared with the above embodiments, the technical scheme of the embodiment has the advantages of simpler structure, simpler operation, more convenient use and stronger flexibility and practicability. Compared with the prior art, the first control unit and the second control unit share one electric parameter detection unit, so that the fault protection can be met, the requirements of presetting operation and the like can be met, and the use number of parameter detection devices can be reduced, the cost is reduced, the structure is simplified, the operation is convenient, and the use convenience is improved.
As a specific embodiment, optionally, the electrical parameter detection unit 40 includes at least one of a current detection element and a voltage detection element.
Specifically, the corresponding electrical parameter detection element may be set according to a specific preset operation. For example, when the preset operation is to accurately display the voltage value between the inverter 10 and the grid 30, the electrical parameter detection unit may be set as a voltage detection element. When the preset operation is a further metering operation according to the precise current value and/or voltage value, the electrical parameter detection unit may be configured to include a voltage detection element and/or a current detection element. The type and number of the specific detecting elements can be set according to actual conditions, and are not limited specifically herein.
Optionally, the current detecting element is a current transformer, and the voltage detecting element is a voltage transformer.
The schematic diagram of the current transformer is shown in fig. 2 or fig. 3. The current transformer may be connected in series to the strong current terminal A1 of the ac switch 20, or may be hung around the strong current terminal A1 of the ac switch 20. In addition, the current transformer may be connected in series to the other high-voltage terminal A3 of the ac switch 20, or may be hung on the other high-voltage terminal A3. The schematic diagram of the voltage transformer is shown in fig. 4, and the voltage transformer can be connected in parallel at the detection output end of the ac switch 20.
It should be noted that fig. 2, fig. 3 and fig. 4 are only an exemplary embodiment of the electrical parameter detection unit. The electrical parameter detecting unit in fig. 2 and 3 may also be a voltage transformer, and the electrical parameter detecting unit in fig. 4 may also be a current transformer. The setting may be specifically performed according to actual situations, and is not specifically limited herein.
Optionally, the preset operation comprises displaying a voltage parameter and/or a current parameter at the output side of the inverter.
The preset operation may further include metering of electrical parameters, such as further calculating inverter output power, electricity usage fee, etc. according to the voltage and/or current.
Optionally, the ac switch is a circuit breaker switch.
The circuit breaker switch is used for protecting the circuit safety of the inverter and the power grid. For example, the first control unit may be integrated into the circuit breaker switch to form a product of an integrated structure; the first control unit and the electrical parameter detection unit can also be integrated in the circuit breaker switch to form another integrated structure product.
The embodiment of the utility model provides an inverter is still provided, including the inverter with the utility model provides an inverter on-off control system, inverter on-off control system sets up in the inverter output side.
The inverter can be applied to the technical field of photovoltaic inversion, the technical field of wind power generation inversion and the like.
It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present invention may be executed in parallel, may be executed sequentially, or may be executed in different orders, as long as the desired result of the technical solution of the present invention can be achieved, and the present invention is not limited thereto.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. 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 present invention.
Claims (10)
1. An inverter switch control system, comprising:
the alternating current switch is arranged on the output side of the inverter and is used for controlling the connection or disconnection of the output side of the inverter;
the electric parameter detection unit is arranged on the output side of the inverter and used for detecting the electric parameters on the output side of the inverter;
the first control unit is connected with the detection output end of the electrical parameter detection unit and the control end of the alternating current switch, and is used for receiving the detection signal output by the electrical parameter detection unit and outputting a switch on-off signal to the alternating current switch;
and the second control unit is connected with the detection output end of the electrical parameter detection unit and used for receiving the detection signal output by the electrical parameter detection unit and executing preset operation.
2. The inverter switch control system according to claim 1, wherein the ac switch and the first control unit are integrated.
3. The inverter switch control system according to claim 2, wherein the electrical parameter detection unit is provided inside the integrated structure;
the detection output end of the electrical parameter detection unit is the signal output end of the integrated structure, and the signal output end of the integrated structure is connected with the second control unit.
4. The inverter switch control system according to claim 2, wherein the electrical parameter detection unit and the second control unit are provided outside the integrated structure;
the input end of the first control unit is a signal input end of the integrated structure, and the signal input end of the integrated structure is connected with the detection output end of the electrical parameter detection unit.
5. The inverter switch control system according to claim 2, wherein the electrical parameter detection unit and the second control unit are provided outside the integrated structure;
the input end of the first control unit is a signal input end of the integrated structure, and the signal input end of the integrated structure is connected with the second control unit; the second control unit is used for outputting the switch on-off signal to the first control unit.
6. The inverter switch control system according to claim 1, wherein the electrical parameter detection unit includes at least one of a current detection element and a voltage detection element.
7. The inverter switch control system according to claim 6, wherein the current detecting element is a current transformer, and the voltage detecting element is a voltage transformer.
8. The inverter switch control system of claim 6, wherein the preset operation comprises displaying a voltage parameter and/or a current parameter of the inverter output side.
9. The inverter switch control system of claim 1, wherein the ac switch is a circuit breaker switch.
10. An inverter system characterized by comprising an inverter and the inverter switch control system according to any one of claims 1 to 9, the inverter switch control system being provided on the output side of the inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221247460.0U CN217824245U (en) | 2022-05-23 | 2022-05-23 | Inverter switch control system and inverter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221247460.0U CN217824245U (en) | 2022-05-23 | 2022-05-23 | Inverter switch control system and inverter system |
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