A supply-demand type intelligent low-voltage reactive power control component structure and control system

Abstract

The present invention discloses a supply-demand type intelligent low-voltage reactive control component structure and control system, wherein the supply-demand type intelligent low-voltage reactive control component structure comprises a first accommodating cabinet and a first control unit, wherein the first accommodating cabinet is used to accommodate a first capacitor and / or a first reactor; the first control unit is arranged on the first accommodating cabinet, and comprises a plurality of first control components, wherein the plurality of first control components are respectively connected to the first capacitor or the first reactor. The present invention makes the low-voltage reactive control component structure modular, and can set the components in the low-voltage reactive control component structure according to user needs, and is suitable for the performance of different low-voltage reactive control component structures, thereby realizing the normalization and standardization of the low-voltage reactive control component structure.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply equipment, and in particular to a supply-demand type intelligent low-voltage reactive power control component structure and a control system. Background Art

[0002] Low-voltage reactive power control components are mainly used for reactive power compensation at the low-voltage end of the power supply and utilization, and to improve the power factor at the low-voltage end of the power supply and utilization. They are the main technical means for reducing losses and saving energy at the low-voltage end of the power supply and utilization. At the same time, they have the functions of improving the power transmission capacity of the power supply and utilization grid and improving the level of safe operation and power quality of the power supply and utilization grid.

[0003] The inventor of the present application has found in the long-term research and development that the power supply and utilization grid is a system with a large range and complex structure, and the low-voltage reactive power control component structure that matches it has different circuits, voltages, and capacities, as well as different anti-harmonic performance, reactive power control speed, and three-phase or split-phase reactive power control methods. The existing low-voltage reactive power control component structure has a variety of styles due to different performances, which causes inconvenience to the design, manufacture, selection of the low-voltage reactive power control component structure and the design, manufacture, operation and maintenance of the low-voltage reactive power control system, making it difficult to achieve the standardization and standardization of the low-voltage reactive power control component structure and the low-voltage reactive power control system. Summary of the invention

[0004] The present invention provides a supply-demand type intelligent low-voltage reactive power control component structure and control system to solve the technical problem in the prior art that the low-voltage reactive power control component structure cannot be standardized due to the different styles of the low-voltage reactive power control component structure.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a supply-demand type intelligent low-voltage reactive power control component structure, including:

[0006] A first accommodating cabinet, used for accommodating a first capacitor and / or a first reactor;

[0007] The first control unit is arranged on the first containing cabinet, and includes a plurality of first control components, and the plurality of first control components are respectively connected to the first capacitor or the first reactor, so that the structure of the supply-demand type intelligent low-voltage reactive power control component is modularized.

[0008] In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a supply-demand type intelligent low-voltage reactive power control system, including the above supply-demand type intelligent low-voltage reactive power control component structure.

[0009] The present invention connects and sets the first control component in the supply and demand type intelligent low-voltage reactive control component structure with the first capacitor or the first reactor in a one-to-one correspondence, so that the supply and demand type intelligent low-voltage reactive control component structure is modularized, and the components in the low-voltage reactive control component structure can be set according to user needs, and the performance of different low-voltage reactive control component structures is suitable, thereby realizing the normalization and standardization of the low-voltage reactive control component structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0011] Figure 1 It is a structural schematic diagram of an embodiment of a supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0012] Figure 2 It is a schematic diagram of a top view of an embodiment of a supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0013] Figure 3 It is a schematic diagram of the relay structure of an embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0014] Figure 4 It is a schematic diagram of the fuse structure of an embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0015] Figure 5 It is a structural schematic diagram of another embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0016] Figure 6 It is a structural schematic diagram of another embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0017] Figure 7 It is a structural schematic diagram of another embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0018] Figure 8 It is a structural schematic diagram of another embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention;

[0019] Fig. 9 It is a structural schematic diagram of an embodiment of a supply-demand type intelligent low-voltage reactive power control system of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 and Figure 2 , an embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention includes:

[0022] A first accommodating cabinet 10, used for accommodating a first capacitor 101;

[0023] In this embodiment, the first accommodating cabinet 10 may be an industrial aluminum profile formed of a metal casting or a molded part, or may be made of other materials such as steel.

[0024] The first control unit 20 is arranged on the first containing cabinet 10, and includes a plurality of first control components 201, a power switch 202, an operating unit 203 and an external unit 204. Among them, the plurality of first control components 201 are arranged on one side of the first containing cabinet 10, and are respectively connected to the first capacitor 101, so that the structure of the supply and demand type intelligent low-voltage reactive power control component is modularized; the power switch 202 is arranged on the side of the first containing cabinet 10 away from the first control component 201, and is electrically connected to the first control component 201, and is used to turn on or off the first control component 201; the operating unit 203 is arranged on the side of the first containing cabinet 10, the power switch 202 is away from the first control component 201, and is used to display and provide an operation interface; the external unit 204 is arranged on the side of the first containing cabinet 10, the first control component 201 is away from the power switch 202;

[0025] A first cover shell 30 is disposed on the first control unit 20;

[0026] In this embodiment, the first cover shell 30 may be a metal casting or a molded part made of aluminum, steel, or the like.

[0027] Specifically, the first control component 201 includes a circuit board 2011, a relay 2012, a current transformer 2013 and a fuse 2014. The circuit board 2011 is arranged on the first containing cabinet 10; the relay 2012 and the fuse 2014 are arranged on the circuit board 2011, and the fuse 2014 is electrically connected to the circuit board; the current transformer 2013 is arranged on the fuse 2014.

[0028] The first cover shell 30 is respectively provided with openings corresponding to the fuse 2014 , the power switch 202 and the operating portion 203 , so as to accommodate and protect the fuse 2014 , the power switch 202 and the operating portion 203 .

[0029] The power switch 202 is provided with a first terminal 2021 , a second terminal 2022 and a switch handle 2023 . The first terminal 2021 and the second terminal 2022 are respectively arranged on two sides of the power switch 202 close to the first accommodating cabinet 10 , and the switch handle 2023 is arranged on a side of the power switch 202 away from the first accommodating cabinet 10 .

[0030] In this embodiment, the first terminal 2021 and the second terminal 2022 are respectively the positive and negative electrodes of the power switch 202 .

[0031] See also Figure 1 and Figure 3 The relay 2012 includes a first contact 2012a and a second contact 2012b, which are respectively arranged in the relay 2012. The first contact 2012a is electrically connected to the first terminal 2021, and the second contact 2012b is electrically connected to the capacitor 101.

[0032] The current transformer 2013 is a through-type current transformer.

[0033] See also Figure 1 and Figure 4 The fuse 2014 includes a main body 2014a, a first cover body 2014b, a second cover body 2014c, a first terminal 2014d and a second terminal 2014e. The first cover body 2014b and the second cover body 2014c are respectively arranged at two ends of the main body 2014a; the first terminal 2014d is arranged on the first cover body 2014b and is integrally formed with the first cover body 2014b; the second terminal 2014e is arranged on the second cover body 2014c and is integrally formed with the second cover body 2014c, the second terminal 2014e passes through the current transformer 2013, the second terminal 2014e is electrically connected to the circuit board 2011, and the second terminal 2014e is electrically connected to the second terminal 2022.

[0034] In this embodiment, the height of the fuse body 2014a protruding from the first cover shell 30 is greater than or equal to one quarter of the height of the fuse body.

[0035] In this embodiment, the first control unit 20 includes three fuses and three first wiring terminals corresponding to the three fuses, and the three first wiring terminals are connected to the A, B, and C three-phase power supplies respectively.

[0036] See also Figure 1The first control assembly 201 further includes a second cover shell 2015 and a cover shell 2016. The second cover shell 2015 is disposed on the fuse 2014. The upper end of the second cover shell 2015 is provided with an opening for accommodating the first terminal 2014d. The sides of the lower end of the second cover shell 2015 are respectively in contact with the first cover shell 30. The cover shell 2016 is disposed on the second cover shell 2015, and the two sides of the lower end of the cover shell 2016 are respectively in contact with the second cover shell 2015. In this embodiment, the cover shell 2016 is made of a transparent material.

[0037] In other embodiments, the second cover shell may further include ventilation holes for ventilating the fuse 2014 .

[0038] The external connection part 204 includes an external indicator light terminal and an online communication plug-in terminal circuit board (not shown in the figure), which is used for external indicator lights and online communication with the outside world.

[0039] In this embodiment, the supply-demand type intelligent low-voltage reactive power control component structure may further include a connector 401, which is disposed on the first accommodating cabinet 10, and the first control unit 20 is disposed on the connector 401, for connecting the first accommodating cabinet 10 and the first control unit 20. The supply-demand type intelligent low-voltage reactive power control component structure may further include a fixing member 402, which is disposed at the bottom corner of the first accommodating cabinet 10, for fixing the first accommodating cabinet 10.

[0040] In this embodiment, the switch handle 2023 is pulled to turn on the power switch 202; the external voltage signal is introduced into the circuit board 2011 through the external connection part 204, and the reactive power shortage is calculated and analyzed by the circuit board 2011; if it is necessary to compensate for the reactive power, the relay 2012 is closed, and the first capacitor 101 is connected to the power line under the action of the current transformer 2013, the fuse 2014 and other devices; if the reactive power is over-compensated, the relay 2012 is disconnected, and the first capacitor 101 is removed from the power line under the action of the current transformer 2013, the fuse 2014 and other devices.

[0041] The embodiment of the present invention connects and sets the first control component in the supply and demand type intelligent low-voltage reactive control component structure in a one-to-one correspondence with the first capacitor, so that the supply and demand type intelligent low-voltage reactive control component structure is modularized, and the devices in the low-voltage reactive control component structure can be set according to user needs, and the performance of different low-voltage reactive control component structures is suitable, thereby realizing the normalization and standardization of the low-voltage reactive control component structure.

[0042] See also Figure 5 Another embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention includes:

[0043] A first accommodating cabinet 501 is used to accommodate a first capacitor 5011 and a first reactor 5012;

[0044] The first control unit 502 is arranged on the first containing cabinet 501, and is used to control the first capacitor 5011 and the first reactor 5012. The first control unit 502 includes a plurality of first control components, and the first control components are respectively connected to the first capacitor 5011 or the first reactor 5012. The structure of the first control unit refers to the above-mentioned supply-demand type intelligent low-voltage reactive power control component structure embodiment, which will not be repeated here.

[0045] The first reactor 5012 is used to alleviate the harmonic problem generated in the supply-demand type intelligent low-voltage reactive power control component structure. In this embodiment, when reactive power needs to be compensated, the first capacitor 5011 connected in series with the first reactor 5012 is connected to the power line, which can avoid the influence of some harmonic problems on reactive power compensation when reactive power is compensated.

[0046] In this embodiment, a first support member 5013 and a second support member 5014 are provided in the first containing cabinet 501 . The first support member 5013 is used to isolate the first capacitor 5011 and the first reactor 5012 ; the second support member 5014 is used to isolate and support the first reactor 5012 .

[0047] The first contact of the relay 5021 in the first control component is electrically connected to the first terminal of the power switch 5022 , and the second contact is connected to one end of the first inductor 5012 , and the other end of the first inductor 5012 is connected to the first capacitor 5011 .

[0048] The embodiment of the present invention makes the supply and demand type intelligent low-voltage reactive control component structure modular by connecting the first control component in the supply and demand type intelligent low-voltage reactive control component structure with the first capacitor or the first reactor in a one-to-one correspondence. The components in the low-voltage reactive control component structure can be set according to user needs, and the performance of different low-voltage reactive control component structures can be adapted to achieve normalization and standardization of the low-voltage reactive control component structure.

[0049] See also Figure 6 Another embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention includes:

[0050] A first accommodating cabinet (not shown in the figure), used for accommodating a first capacitor (not shown in the figure);

[0051] The first control unit is disposed on the first containing cabinet, and includes a plurality of first control components 601 , 603 , at least two power switches 602 , 604 , an operating unit 605 and an external connection unit 606 .

[0052] Specifically, the structures of the first accommodating cabinet and the first control unit in this embodiment refer to the above-mentioned supply-demand type intelligent low-voltage reactive power control component structure embodiment, and the side view of this embodiment refers to Figure 1 .

[0053] Among them, at least two power switches 602 and 604 are arranged on a side of the first accommodating cabinet away from the first control component 601, each of the at least two power switches 602 and 604 corresponds to at least two first control components, and the power switches 602 and 604 are electrically connected to the corresponding at least two first control components respectively; the first control components corresponding to the at least two power switches 602 and 604 are electrically connected one-to-one; the operating part 605 is arranged on the first accommodating cabinet, on a side of the power switches 602 and 604 away from the first control component, for displaying and providing an operating interface.

[0054] In this embodiment, the first connection terminal 6011 of the fuse in the first control component 601 of the first group is connected to the first connection terminal 6031 of the fuse in the first control component 603 of the second group in a one-to-one correspondence.

[0055] In this embodiment, two groups of first capacitors and corresponding first control components are provided to be applicable to situations where a low-voltage power capacitor with a larger capacity is required. In other embodiments, more than two groups of first capacitors and corresponding first control components may also be provided to be applicable to other situations.

[0056] The embodiment of the present invention makes the supply and demand type intelligent low-voltage reactive control component structure modular by connecting the first control component and the first capacitor in a one-to-one correspondence, and can set the components in the low-voltage reactive control component structure according to user needs, so as to be suitable for the performance of different low-voltage reactive control component structures, thereby realizing the normalization and standardization of the low-voltage reactive control component structure.

[0057] See also Figure 7 and Figure 8 Another embodiment of the supply-demand type intelligent low-voltage reactive power control component structure of the present invention includes:

[0058] A first accommodating cabinet 701, used for accommodating a first capacitor (not shown in the figure);

[0059] The first control unit 702 is disposed on the first containing cabinet 701 and is used to control the first containing cabinet 701 .

[0060] Specifically, the structures of the first accommodating cabinet 701 and the first control unit 702 in this embodiment are shown in Figure 1 The supply-demand type intelligent low-voltage reactive power control component structure implementation example will not be repeated here.

[0061] The supply-demand type intelligent low-voltage reactive power control component structure of the present invention may also include a second accommodating cabinet 703 and a second control unit 704, wherein the second accommodating cabinet 703 is arranged on one side of the first accommodating cabinet 701, fixedly connected to the first accommodating cabinet 701, and is used to accommodate a second capacitor and / or a second reactor (not shown in the figure); the second control unit 704 is arranged on the second accommodating cabinet 703, and is electrically connected to the first control unit 702; the second control unit 704 includes a second control component (not shown in the figure) corresponding to the second capacitor or the second reactor.

[0062] In this embodiment, the second accommodating cabinet 703 is longitudinally connected to the first accommodating cabinet 701, and the second control unit 704 is longitudinally connected to the first control unit 702, and may also include two sequentially connected second accommodating cabinets 703 and second control units 704. In other embodiments, more than two sequentially connected second accommodating cabinets 703 and second control units 704 may also be included.

[0063] Specifically, in this embodiment, the structures of the second capacitor, the second inductor, and the second control component are similar to the structures of the first capacitor, the first inductor, and the first control component in the above embodiments, and are not repeated here.

[0064] The supply-demand type intelligent low-voltage reactive power control component structure of the present invention may also include:

[0065] The third containing cabinet 705 is arranged at one side of the first containing cabinet 701, is fixedly connected to the first containing cabinet 701, and is used to contain a third capacitor and / or a third reactor (not shown in the figure);

[0066] The third control unit 706 is disposed on the third containing cabinet 705, electrically connected to the first control unit 702, and includes a third control component (not shown in the figure), and the third control component is correspondingly connected to a third capacitor or a third reactor.

[0067] In this embodiment, the third accommodating cabinet 705 is horizontally connected to the first accommodating cabinet 701, and the third control unit 706 is horizontally connected to the first control unit 702, and two sequentially connected third accommodating cabinets 705 and third control units 706 may be included. In other embodiments, more than two sequentially connected third accommodating cabinets 705 and third control units 706 may be included.

[0068] Specifically, in this embodiment, the structures of the third capacitor, the third inductor, and the third control component are similar to the structures of the first capacitor, the first inductor, and the first control component in the above embodiments, and are not repeated here.

[0069] The embodiment of the present invention makes the supply and demand type intelligent low-voltage reactive control component structure modular by connecting the first control component in the supply and demand type intelligent low-voltage reactive control component structure with the first capacitor or the first reactor in a one-to-one correspondence. The components in the low-voltage reactive control component structure can be set according to user needs, and the performance of different low-voltage reactive control component structures can be adapted to achieve normalization and standardization of the low-voltage reactive control component structure.

[0070] See also Fig. 9 The supply and demand type intelligent low-voltage reactive power control system embodiment of the present invention includes a supply and demand type intelligent low-voltage reactive power control component structure. Specifically, the supply and demand type intelligent low-voltage reactive power control component structure refers to the above-mentioned supply and demand type intelligent low-voltage reactive power control component structure embodiment, which will not be repeated here.

[0071] The embodiment of the present invention makes the supply and demand type intelligent low-voltage reactive control component structure modular by connecting the first control component in the supply and demand type intelligent low-voltage reactive control component structure with the first capacitor or the first reactor in a one-to-one correspondence. The components in the low-voltage reactive control component structure can be set according to user needs, and the performance of different low-voltage reactive control component structures can be adapted to achieve normalization and standardization of the low-voltage reactive control component structure.

[0072] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A supply-demand type intelligent low-voltage reactive power control component structure, characterized in that: include: A first accommodating cabinet, used for accommodating a first capacitor and / or a first reactor; A first control unit is arranged on the first containing cabinet, and includes a plurality of first control components, wherein the plurality of first control components are respectively connected to the first capacitor or the first reactor, so that the structure of the supply-demand type intelligent low-voltage reactive power control component is modularized; The first control unit also includes: A power switch is arranged on a side of the first accommodating cabinet away from the first control component and is electrically connected to the first control component. The power switch is provided with a first terminal and a second terminal on two sides close to the first accommodating cabinet, respectively. The power switch is used to turn on or off the first control component; An operating unit, arranged on the first containing cabinet, on a side of the power switch away from the first control assembly, and used for displaying and providing an operating interface; The first control component comprises: A circuit board is arranged on the first containing cabinet; A relay is arranged on the circuit board; A fuse is disposed on the circuit board and electrically connected to the circuit board; A current transformer is arranged on the fuse; The relay comprises: A first contact is disposed in the relay, the first contact being electrically connected to the first terminal; A second contact, corresponding to the first contact, is disposed in the relay, and the second contact is electrically connected to the capacitor or the reactor; The fuse comprises: main body; A first cover body and a second cover body are respectively arranged at two ends of the main body; A first connection terminal, disposed on the first cover and integrally formed with the first cover; The second terminal is arranged on the second cover and is formed integrally with the second cover. The second terminal is arranged through the current transformer. The second terminal is connected to the circuit board and is electrically connected to the second terminal.

2. The supply-demand type intelligent low-voltage reactive power control component structure according to claim 1 is characterized in that: Also includes: A second accommodating cabinet, arranged at one side of the first accommodating cabinet, fixedly connected to the first accommodating cabinet, and used for accommodating a second capacitor and / or a second reactor; The second control unit is arranged on the second containing cabinet and is electrically connected to the first control unit, and includes a second control component, and the second control component is correspondingly connected to the second capacitor or the second reactor.

3. The supply-demand type intelligent low-voltage reactive power control component structure according to claim 1 is characterized in that: Also includes: The first cover shell is disposed on the first control part and is respectively provided with openings corresponding to the fuse, the power switch and the operating part, so as to accommodate and protect the fuse, the power switch and the operating part.

4. The supply-demand type intelligent low-voltage reactive power control component structure according to claim 3 is characterized in that: The height of the fuse body protruding from the first cover shell is greater than or equal to one quarter of the height of the body.

5. The supply-demand type intelligent low-voltage reactive power control component structure according to claim 1 is characterized in that: The first control unit also includes: At least two power switches are arranged on a side of the first accommodating cabinet away from the first control assembly, each of the at least two power switches corresponds to at least two first control assemblies, and the power switches are electrically connected to the corresponding at least two first control assemblies respectively; The first control components respectively corresponding to the at least two power switches are electrically connected one by one; An operating unit is arranged on the first containing cabinet, on a side of the power switch away from the first control component, and is used to display and provide an operating interface.

6. A supply-demand type intelligent low-voltage reactive power control system, comprising the supply-demand type intelligent low-voltage reactive power control component structure as described in any one of claims 1 to 5.

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