Capacitance compensation device applied to reactive power compensation
Through a multi-specified combination capacitor bank and capacitor combination switching device, the energy consumption waste problem caused by fixed capacitor configuration in the prior art is solved, and flexible capacitance compensation and energy-saving effects are achieved.
Patent Information
- Application Number
- CN202422470916.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The capacitance configuration of the existing reactive power compensation devices is too fixed, resulting in waste of energy consumption when the user's capacitance compensation needs are small.
A multi-specified combined capacitor bank and capacitor combination switching device is adopted, including multiple capacitors of different specifications and switching capacitor contactors. The capacitor combination is carried out through the control instructions of the reactive power compensation controller to meet different compensation needs.
It realizes that under the conditions of lower cost and energy consumption, adapts to different load needs, meets the small reactive power demand compensation requirements in conventional loads, and improves the flexibility and energy-saving effect of capacitor compensation.
Smart Images
Figure CN223218842U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power grid distribution, in particular to a capacitor compensation device used for reactive power compensation. Background Art
[0002] At present, commonly used reactive power compensation devices include reactive power compensation capacitor cabinets and intelligent reactive power compensation capacitor banks.
[0003] The capacity of the reactive power compensation capacitor cabinet is generally configured according to 40% of the transformer capacity. To save costs and space, manufacturers generally use equal-capacity configuration for the capacitors in the capacitor cabinet, such as 10 groups of 20 kvar and 10 groups of 30 kvar. The configuration of the smart capacitor bank is similar to that of the capacitor cabinet. Generally, a smart capacitor is composed of two capacitors of equal capacity (such as 10 kvar + 10 kvar or 20 kvar + 20 kvar). A smart capacitor bank is composed of a network of several smart capacitors. The advantage of smart capacitors over capacitor cabinets is that they can be automatically networked.
[0004] However, the current capacitor configuration method is too fixed. When the demand for user capacitance compensation is small, the current method will cause a large waste of energy. Utility Model Content
[0005] The purpose of the utility model is to provide a capacitor compensation device for reactive power compensation, so as to alleviate the above-mentioned technical problems existing in the prior art.
[0006] In a first aspect, the present invention provides a capacitor compensation device for reactive power compensation, comprising: a capacitor bank with multiple specifications, a capacitor combination switching device, and a reactive power compensation controller; wherein:
[0007] The multi-specification combined capacitor bank includes a plurality of capacitors of different specifications. The capacitor combination switching device includes a corresponding number of switching capacitor contactors. Each capacitor is equipped with a switching capacitor contactor. One end of the switching capacitor contactor is connected to the corresponding capacitor in the multi-specification combined capacitor bank, and the other end is connected to the main power line.
[0008] The multi-specification combined capacitor bank is used to respond to the control instructions of the reactive power compensation controller and combine the included capacitors with corresponding specifications to perform capacitance compensation of corresponding specifications;
[0009] The multi-specification combination capacitor bank includes six capacitors of different specifications, including one 1 kvar, one 2 kvar, one 4 kvar, and three 8 kvar capacitors.
[0010] The lower contact of each switching capacitor contactor is connected to the capacitor, and the upper contact is connected to the main power line. The main power line is connected to the load side connection point of the circuit breaker. The power side connection point of the circuit breaker is reserved for connecting the power line when in use.
[0011] The coil A2 of each switched capacitor contactor is connected to the first external terminal block and the parallel neutral line;
[0012] The coil A1 of each switched capacitor contactor is connected to the second external terminal block to receive a control instruction from the reactive power compensation controller through the second external terminal block;
[0013] The second external terminal block is the driver module terminal block;
[0014] The coil A1 of each switched capacitor contactor is connected to the drive module terminal block, and is connected to the drive module through the drive module terminal block;
[0015] The drive module has a reserved RJ-45 interface to cooperate with the intelligent capacitor network or receive control instructions from the reactive power compensation controller;
[0016] The driving module and the second external terminal block are switched by a manual transfer switch.
[0017] In an optional embodiment, the capacitors of the multi-specification combined capacitor group are installed in one distribution box, or a plurality of capacitors of different specifications are made into a connected capacitor.
[0018] The beneficial effects of the capacitor compensation device for reactive power compensation provided by the utility model are as follows:
[0019] Since it is equipped with capacitors of various specifications, it can adapt to different scenarios and can be used for both conventional capacitor cabinets and intelligent capacitor banks. It can supplement and improve the missing functions of existing capacitor cabinets and intelligent capacitor banks, and form a sloped stepless compensation with the original capacitors to adapt to different compensation requirements of loads. It can basically meet the smaller reactive demand compensation needs in conventional loads with lower cost and energy consumption, which is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1A structural diagram of a capacitor compensation device for reactive power compensation provided by an embodiment of the present utility model;
[0022] Figure 2 A schematic diagram of a multi-specification combined capacitor bank provided by an embodiment of the present utility model;
[0023] Figure 3 A schematic diagram of a specific multi-specification combined capacitor bank provided by an embodiment of the present utility model;
[0024] Figure 4 A structural diagram of a capacitor compensation device specifically used for reactive power compensation provided by an embodiment of the present utility model;
[0025] Figure 5 A connection diagram for manually selecting capacitor switching provided by an embodiment of the present utility model. DETAILED DESCRIPTION
[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.
[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0030] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0031] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.
[0032] The utility model provides a capacitor compensation device for reactive power compensation, see Figure 1 As shown, the capacitor compensation device for reactive power compensation includes: a multi-specification combined capacitor bank, a capacitor combination switching device, and a reactive power compensation controller. The multi-specification combined capacitor bank includes multiple capacitors of different specifications, and the capacitor combination switching device includes a corresponding number of switching capacitor contactors, one for each capacitor. One end of the switching capacitor contactor is connected to the corresponding capacitor in the multi-specification combined capacitor bank, and the other end is connected to the main power line. The multi-specification combined capacitor bank is used to respond to control commands from the reactive power compensation controller and combine the included capacitors into corresponding specifications to perform capacitance compensation of the corresponding specifications.
[0033] The above-mentioned multi-specification combined capacitor group includes n capacitors. Correspondingly, the capacitor combination switching device includes n switching capacitor contactors. The corresponding capacitors are connected or disconnected by switching the connection of the switching capacitor contactors. When two or more capacitors are connected, it is equivalent to connecting the combined capacitors, thereby realizing the connection of capacitors of corresponding specifications.
[0034] In an optional embodiment, the multi-specification combined capacitor group includes a first number of capacitors with different specifications, wherein a second number of capacitors with the same specifications is included, and the second number is smaller than the first number.
[0035] See also Figure 2 As shown, a multi-specification combined capacitor bank may include A kvar capacitor 1, B kvar capacitor 2, ..., and C kvar capacitors n-1 and n, that is, it includes at least two capacitors (capacitor n-1 and capacitor n) of the same specification (C kvar). In actual applications, capacitors of corresponding specifications and numbers can also be configured according to actual needs. This is only an example and is not specifically limited.
[0036] In a specific embodiment, the multi-specification combined capacitor bank includes 6 capacitors of different specifications, including 1 1 kvar, 1 2 kvar, 1 4 kvar, and 3 8 kvar capacitors, see Figure 3 shown.
[0037] In this way, the minimum compensation amount can be 1 kvar and the maximum compensation amount can be 31 kvar. The intermediate range of 1 kvar to 31 kvar can be formed into infinite compensation through group selection, such as 1+2=3 kvar, 2+4+8=14 kvar, 4+8+8+8=24 kvar, etc., thereby improving the compensation range limit of the capacitance compensation amount, being able to compensate for a small range without wasting too much energy, and at the same time meeting the capacitance compensation in a larger range.
[0038] In another optional embodiment, the multi-specification combined capacitor bank includes multiple capacitors with completely different specifications. The specifications of the capacitors can be set according to actual needs and are not specifically limited here.
[0039] For ease of application, the capacitors of the above-mentioned multi-specification combined capacitor bank can be installed in one distribution box, or multiple capacitors of different specifications can be made into a connected capacitor.
[0040] This application also provides a specific capacitor compensation device for reactive power compensation, see Figure 4 As shown, taking 6 capacitors as an example, the lower contact of each switching capacitor contactor corresponding to each capacitor is connected to the corresponding capacitor, and the upper contact is connected to the main power line (ie Figure 4 In the connections a, b, and c), the main power line is connected to the wiring point on the load side of the circuit breaker. The wiring point on the power side of the circuit breaker is reserved for connecting the power line when in use.
[0041] Furthermore, the coil A2 of each switched capacitor contactor is connected to the first external terminal block (ie Figure 4 Terminal block 1 in the ), and the parallel neutral line (i.e. Figure 4 N line in the ).
[0042] In addition, the coil A1 of each switched capacitor contactor is connected to the second external terminal block (i.e. Figure 4 Terminal block 2 in the figure) to receive control instructions of the reactive power compensation controller through the second external terminal block.
[0043] In one example, the above-mentioned second external terminal block is a drive module terminal block; the coil A1 of each switching capacitor contactor is connected to the drive module terminal block, and is connected to the drive module through the drive module terminal block; the drive module reserves an RJ-45 interface (crystal head socket) to cooperate with the smart capacitor networking or receive control instructions from the reactive power compensation controller.
[0044] In one embodiment, the drive module and the second external terminal block are switched by a manual switch. Figure 5 This connection method allows on-site operators to independently choose to switch the capacitors through the RJ-45 interface driver module or the second external terminal block, thereby improving the flexibility of use and avoiding the limitation of being unable to switch the capacitors due to damage to one component, thereby improving the stability of use and the stability of capacitor switching.
[0045] In summary, the embodiments of the present application can adapt to different scenarios and can be used for both conventional capacitor cabinets and intelligent capacitor banks. This solution supplements and improves the missing functions of existing capacitor cabinets and intelligent capacitor banks, and forms a sloped stepless compensation with the original capacitors to adapt to different compensation requirements of loads. It can make the small capacitor combination basically meet the smaller reactive demand compensation requirements in conventional loads, greatly reducing costs and power consumption.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A capacitor compensation device for reactive power compensation, characterized in that: include: Multi-specification combined capacitor banks, capacitor combination switching devices and reactive power compensation controllers; among them, The multi-specification combined capacitor bank includes a plurality of capacitors of different specifications, and the capacitor combination switching device includes a corresponding number of switching capacitor contactors, each capacitor is equipped with a switching capacitor contactor, one end of the switching capacitor contactor is connected to the corresponding capacitor in the multi-specification combined capacitor bank, and the other end is connected to the main power line; The multi-specification combined capacitor bank is used to respond to the control instruction of the reactive power compensation controller and combine the included capacitors with corresponding specifications to perform capacitance compensation of corresponding specifications; The multi-specification combination capacitor bank includes six capacitors of different specifications, including one 1 kvar, one 2 kvar, one 4 kvar, and three 8 kvar capacitors. The lower contact of each switching capacitor contactor is connected to the capacitor, the upper contact is connected to the main power line, the main power line is connected to the load side connection point of the circuit breaker, and the power side connection point of the circuit breaker is reserved for connecting the power line when in use; The coil A2 of each of the switching capacitor contactors is connected to a first external terminal block and a parallel neutral line; The coil A1 of each of the switched capacitor contactors is connected to a second external terminal block to receive a control instruction from the reactive power compensation controller through the second external terminal block; The second external terminal block is a driver module terminal block; The coil A1 of each of the switching capacitor contactors is connected to the drive module terminal block, and is connected to the drive module through the drive module terminal block; The drive module reserves an RJ-45 interface to cooperate with the intelligent capacitor network or receive control instructions from the reactive power compensation controller; The driving module and the second external terminal block are switched by a manual transfer switch.
2. The capacitor compensation device for reactive power compensation according to claim 1, characterized in that: The capacitors of the multi-specification combined capacitor group are installed in a distribution box, or a plurality of capacitors of different specifications are made into a connected capacitor.