Box-type efficient capacitance compensation device
By integrating the capacitor compensation device into the enclosure to form a modular structure, the problems of high construction cost and long construction period of traditional capacitor compensation devices are solved, achieving efficient and reliable capacitor compensation, which is suitable for outdoor and space-constrained occasions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional capacitor compensation devices have high construction costs, long construction periods, complex on-site installation, low efficiency, and are easily affected by environmental factors.
Design a box-type high-efficiency capacitor compensation device, integrating the capacitor compensation components into the box to form a modular structure. Assembly and debugging are completed in the factory, and the whole unit is transported to the site. It can be used with only simple wiring. The device includes a monitoring room and capacitor compensation components inside the box, adopts an IP65 protection rating, and is suitable for outdoor and space-constrained occasions.
It eliminates the cost of building construction, shortens the construction period, improves the reliability and environmental adaptability of the device, and is suitable for outdoor and space-constrained environments.
Smart Images
Figure CN223967543U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power system technology, and in particular to a box-type high-efficiency capacitor compensation device. Background Technology
[0002] With the continuous development of the power system, power users have increasingly higher requirements for power quality, and reactive power compensation, as an important means to improve power quality, is becoming increasingly important.
[0003] Traditional capacitor compensation devices are typically installed indoors, requiring the construction of dedicated buildings or the use of existing structures. This not only increases construction costs but also extends the construction period. Furthermore, traditional devices require complex wiring and debugging during on-site installation, resulting in low efficiency, high costs, and susceptibility to environmental factors.
[0004] Therefore, it is necessary to improve the existing capacitor compensation device. Utility Model Content
[0005] This application provides a box-type high-efficiency capacitor compensation device, which aims to solve the problems of high construction cost and long construction period when traditional capacitor compensation devices are set up on site.
[0006] To achieve the above objectives, this application proposes a box-type high-efficiency capacitor compensation device, comprising:
[0007] The enclosure contains a first chamber and a second chamber, which are separated and located in the middle of one side wall of the enclosure and are used as a monitoring room.
[0008] The capacitor compensation component includes a first capacitor compensation component and a second capacitor compensation component. The first capacitor compensation component and the second capacitor compensation component are arranged in a mirror image in the second chamber. The center of symmetry of the first capacitor compensation component and the second capacitor compensation component coincides with the central axis of the first chamber and are connected to the same power system for performing capacitor compensation of the power system independently or collaboratively.
[0009] In some embodiments, both the first capacitor compensation component and the second capacitor compensation component include a switching element, a three-phase reactor, and a capacitor bank.
[0010] The switching element is connected in series to the input terminal of the three-phase reactor. The number of capacitor banks is set to three. The output terminal of the three-phase reactor is connected in series with the three capacitor banks respectively. The output terminals of the three capacitor banks are respectively connected to the three phase lines of the power system.
[0011] The switching of the capacitor bank is controlled by controlling the opening and closing state of the switching device, thereby adjusting the reactive power in the power system.
[0012] In some embodiments, the system further includes discharge coils, the number of which corresponds one-to-one with the number of capacitor banks and are connected in parallel with their respective capacitor banks, and the output terminals of the discharge coils are grounded via grounding switches.
[0013] In some embodiments, the grounding switch is configured with an on / off control mechanism, the on / off control mechanism including an operating rod for realizing the grounding switch being turned on / off, the operating rod being disposed in the first cavity.
[0014] In some embodiments, the housing is provided with access doors for entering the first chamber and the second chamber, respectively.
[0015] In some embodiments, corresponding to the first capacitor compensation component and the second capacitor compensation component, maintenance doors are respectively provided on the opposite walls of the housing.
[0016] In some embodiments, a transparent observation window is provided on the side wall of the first chamber for observing the operating status of the capacitor compensation component in the second chamber.
[0017] In some embodiments, a heat sink is further included, which is disposed on both sides of the second chamber corresponding to the first capacitor compensation component and the second capacitor compensation component, respectively.
[0018] In some embodiments, a surge arrester is also provided in the second chamber to protect the capacitor compensation assembly from damage caused by lightning overvoltage and operational overvoltage.
[0019] In some embodiments, the enclosure has an IP65 protection rating.
[0020] This application proposes a box-type high-efficiency capacitor compensation device. The device includes a box housing divided into two chambers: a first chamber and a second chamber. The first chamber is designated as a monitoring room, located near the center of one side wall of the box housing for easy monitoring and operation. The second chamber contains a mirror image of the first and second capacitor compensation components. The centers of symmetry of the first and second capacitor compensation components coincide with the central axis of the first chamber, and they are connected to the same power system for independent / cooperative capacitor compensation of the power system. This application integrates a traditional capacitor compensation device into a box housing, forming a modular and integrated capacitor compensation device. The device is assembled and debugged in the factory and then transported to the site as a whole. It requires only simple wiring for immediate use, eliminating the need for secondary installation. This design not only saves on building construction costs and shortens the construction period but also improves the reliability and environmental adaptability of the device, making it particularly suitable for outdoor, temporary power supply applications and locations with strict installation space requirements. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0022] Figure 1 This is a schematic diagram of the structure of a box-type high-efficiency capacitor compensation device according to an embodiment of this application after removing the top cover;
[0023] Figure 2 This is a schematic diagram of the structure of a box according to an embodiment of this application;
[0024] Figure 3 This is a schematic diagram of the structure of a capacitor compensation component according to an embodiment of this application;
[0025] Figure 4 for Figure 1 An enlarged schematic diagram of the middle structure S. Detailed Implementation
[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0027] It should be noted that, unless otherwise stated or limited, all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0028] It should also be noted that, unless otherwise stated or limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be an intervening element present. When an element is referred to as "connected to" another element, it may be directly connected to the other element or there may be an intervening element present.
[0029] Furthermore, unless otherwise stated or limited, the descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.
[0030] See Figure 1 and Figure 2 As shown, this application proposes a box-type high-efficiency capacitor compensation device 100. The box-type high-efficiency capacitor compensation device 100 includes a box 10 and a capacitor compensation component 20 disposed within the box 10. Furthermore, the technical solution of this application integrates a traditional capacitor compensation device into the box, forming a modular and integrated capacitor compensation device. This device completes all equipment assembly and debugging in the factory, and then is transported to the site as a whole. It can be put into use with only simple wiring, without the need for secondary installation.
[0031] The design of this application not only saves on building construction costs and shortens the construction period, but also improves the reliability and environmental adaptability of the device, making it particularly suitable for outdoor, temporary power supply applications and locations with strict requirements for installation space.
[0032] The enclosure 10 serves as the outer shell of the device, providing a sealed environment to protect the internal capacitor compensation assembly 20 and other electronic components from external environmental interference and damage. In some embodiments, the enclosure 10 has an IP65 protection rating. IP rating, short for Ingress Protection, is a standard for the protection level of electrical equipment enclosures against foreign object intrusion. An IP65 protection rating significantly improves the reliability of the equipment, enabling it to operate stably under harsh environmental conditions. Preferably, the enclosure 10 has a container-type structure design, allowing for flexible transport via various modes of transportation such as rail, road, waterway, and air, facilitating rapid deployment and relocation of the device and improving its applicability.
[0033] Specifically, the enclosure 10 is divided into a first chamber 11 and a second chamber 12. The first chamber 11 is located in the middle of one side wall of the enclosure 10 and serves as a monitoring room; while the second chamber 12 is used to house the capacitor compensation assembly 20. In this way, dividing the enclosure 10 into the first chamber 11 and the second chamber 12 makes the internal structure of the device more compact and orderly; moreover, separating components with different functions and properties can improve the overall safety and reliability.
[0034] Understandably, the first chamber 11 is usually equipped with a control component for controlling the operating status of the capacitor compensation component, such as a power factor controller. By monitoring parameters such as voltage, current and power factor of the power system in real time, and based on the set target power factor and control strategy, it automatically calculates the reactive power that needs to be compensated, and then controls the switching of the capacitor compensation component 20 to compensate the reactive power of the power system and improve the power factor.
[0035] The device in this application includes a first capacitor compensation component 21 and a second capacitor compensation component 22 disposed within a second chamber 12. The two capacitor compensation components 20 have the same function, but are physically mirror-image arranged, with their centers of symmetry coinciding with the central axis of the first chamber 11. This not only maintains good symmetry and effectively utilizes the space of the housing 10, but also helps in the uniform distribution and rapid dissipation of heat, improving the device's heat dissipation efficiency and extending its service life. Furthermore, the first capacitor compensation component 21 and the second capacitor compensation component 22 are connected in parallel to the same power system, allowing the two sets of capacitor compensation components 20 to work independently or collaboratively, optimizing the capacitor compensation effect. For example, when the load in the power system changes, the power factor controller can activate one set of capacitor compensation components or both sets simultaneously, depending on the actual situation, to compensate for reactive power in the power system, achieving efficient and accurate compensation.
[0036] See Figure 3As shown, in some embodiments, both the first capacitor compensation component 21 and the second capacitor compensation component 22 include a switch 211, a three-phase reactor 212, and a capacitor bank 213. The switch 211 is connected in series with the input terminal of the three-phase reactor. Three capacitor banks 213 are provided, and the output terminals of the three-phase reactor 212 are connected in series with each of the three capacitor banks 213. The three capacitor banks 213 are connected to the three phase lines of the power system. By controlling the opening and closing state of the switch 211, the switching of the capacitor banks 213 can be controlled, thereby adjusting the reactive power in the power system.
[0037] This embodiment presents the specific structural configuration of the first capacitor compensation component 21 and the second capacitor compensation component 22. The switch 211 is preferably a vacuum circuit breaker, which possesses excellent performance in terms of high reliability, long lifespan, and low maintenance costs, making it suitable for capacitor compensation applications requiring frequent operation. The three-phase reactor 212 limits the inrush current generated when the capacitor bank 213 is switched on and off, protecting the capacitor bank 213 and the power system from damage. Simultaneously, the reactor, together with the capacitor bank 213, forms a resonant circuit to filter harmonics in the power system. Furthermore, the number of capacitor banks 213 is set to three, each corresponding to a single phase line of the power system. Each capacitor bank 213 consists of multiple capacitors connected in series and parallel to provide the required capacitance value. Each electrical component can withstand a voltage input of at least 35kV. The working principle of the capacitor compensation component 20 is as follows:
[0038] By controlling the opening and closing state of the switch 211, the switching control of the capacitor bank 213 is realized. When a phase line requires reactive power compensation, the vacuum circuit breaker closes, connecting the capacitor bank 213 to the power system; when compensation is not required, the vacuum circuit breaker opens, disconnecting the capacitor bank 213 from the power system. This switching control can be dynamically adjusted according to the actual needs of the power system, ensuring that the capacitor compensation device always provides appropriate reactive power compensation.
[0039] See Figure 3 and Figure 4 As shown, in some embodiments, the capacitor compensation component 20 further includes a discharge coil 214, the number of discharge coils 214 corresponding one-to-one with the number of capacitor groups 213, and connected in parallel with their respective capacitor groups 213, and the neutral point of the capacitor group 213 is grounded through a grounding switch 215.
[0040] In this embodiment, the discharge coil 214 is connected in parallel with its corresponding capacitor bank 213. When the capacitor bank 213 is disconnected from the power system, the discharge coil 214 provides a discharge circuit for the capacitor bank 213, which quickly releases the electrical energy stored in the capacitor bank 213 and avoids the capacitor bank 213 from being energized and causing safety hazards.
[0041] Furthermore, the neutral point grounding configuration of capacitor bank 213 provides greater flexibility and safety. When capacitor bank 213 requires maintenance or repair, the neutral point of capacitor bank 213 can be grounded by operating grounding switch 215 to release residual charge and ensure the safety of operators.
[0042] Furthermore, the grounding switch 215 is equipped with an on / off control mechanism, which includes an operating lever 216 for turning the grounding switch 215 on / off. The operating lever 216 is located inside the first chamber 11. This design of the operating lever 216 enhances the convenience and safety of operation for the operator.
[0043] See Figure 2 As shown, in some embodiments, the housing 10 is provided with inspection doors 13 for entering the first chamber 11 and the second chamber 12, respectively.
[0044] Understandably, the first chamber 11 and the second chamber 12 each house different electrical components. The corresponding access doors 13 are designed to allow operators to enter the respective chambers for operation, such as performing control operations in the first chamber 11 and performing maintenance work on electrical components in the second chamber 12. This avoids the safety hazards caused by the high-voltage environment in the second chamber 12 and ensures the safety of the operators.
[0045] Furthermore, corresponding to the first capacitor compensation component 21 and the second capacitor compensation component 22, inspection doors 13 are respectively provided on the opposite walls of the housing 10. In this way, multiple inspection doors 13 are provided for different capacitor compensation components 20, so that operators can select the appropriate inspection door 13 to enter as needed for targeted maintenance and operation, avoiding the problem that the compact layout of the components in the second chamber 12 would prevent operators from passing through or from being unable to inspect some components.
[0046] In addition, a transparent observation window (not shown in the attached figure) is provided on the side wall of the first chamber 11. The transparent observation window allows the operator to directly observe the real-time operating status of the capacitor compensation component 20 in the second chamber 12 without opening the maintenance door 13. This helps the operator to quickly identify whether the component is working properly and whether there are any potential faults or abnormalities.
[0047] See Figure 2 As shown, in some embodiments, the capacitor compensation device further includes a heat sink 14, which is disposed on both sides of the second chamber 12 corresponding to the first capacitor compensation component 21 and the second capacitor compensation component 22, respectively.
[0048] In this embodiment, the heat sink 14 is disposed on both sides of the second chamber 12 corresponding to the first capacitor compensation component 21 and the second capacitor compensation component 22, respectively. It can effectively absorb and dissipate the heat generated by the component to the external environment, thereby reducing the operating temperature of the component and preventing performance degradation or failure caused by overheating.
[0049] The heat sink 14 may take various structural forms, such as a cooling fan and a cooling air conditioner. Users can select the appropriate configuration based on the heat output of the capacitor compensation component 20, its spatial layout, and heat dissipation requirements.
[0050] See Figure 1 As shown, in some embodiments, a surge arrester 15 is also provided in the second chamber 12 to protect the capacitor compensation assembly 20 from damage caused by lightning overvoltage and switching overvoltage. When a lightning strike or switching overvoltage occurs in the power grid, the surge arrester 15 can act quickly to limit the overvoltage to a safe level, thereby protecting the capacitor compensation assembly 20 from damage.
[0051] The surge arrester 15 is located within the second chamber 12, spatially closely adjacent to the capacitor compensation assembly 20. This ensures that the surge arrester 15 can respond to overvoltage events promptly and effectively, providing comprehensive protection for the capacitor compensation assembly 20. In further optimization, the surge arrester 15 corresponds to multiple capacitor banks 213.
[0052] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.
Claims
1. A box-type high-efficiency capacitor compensation device, characterized in that, include: The enclosure contains a first chamber and a second chamber, which are separated and located in the middle of one side wall of the enclosure and are used as a monitoring room. The capacitor compensation component includes a first capacitor compensation component and a second capacitor compensation component. The first capacitor compensation component and the second capacitor compensation component are arranged in a mirror image in the second chamber, and the centers of symmetry of the first capacitor compensation component and the second capacitor compensation component coincide with the central axis of the first chamber. They are connected to the same power system and are used to perform capacitor compensation on the power system individually or collaboratively.
2. The high-efficiency capacitance compensation device according to claim 1, characterized in that, Both the first capacitor compensation component and the second capacitor compensation component include a switching component, a three-phase reactor, and a capacitor bank; The switching element is connected in series to the input terminal of the three-phase reactor, and the number of capacitor banks is set to three, with the output terminal of the three-phase reactor connected in series with the three capacitor banks respectively. The output terminals of the three sets of capacitor banks are respectively connected to the three phase lines of the power system; The switching of the capacitor bank is controlled by controlling the opening and closing state of the switching device, thereby adjusting the reactive power in the power system.
3. The high-efficiency capacitor compensation device according to claim 2, characterized in that, It also includes discharge coils, the number of which corresponds one-to-one with the number of capacitor banks and are connected in parallel with their respective capacitor banks, and the neutral point of the capacitor banks is grounded through a grounding switch.
4. The high-efficiency capacitor compensation device according to claim 3, characterized in that, The grounding switch is equipped with an on / off control mechanism, which includes an operating rod for turning the grounding switch on / off, and the operating rod is disposed in the first cavity.
5. The high-efficiency capacitor compensation device according to claim 1, characterized in that, The enclosure is equipped with access doors for entering the first chamber and the second chamber, respectively.
6. The high-efficiency capacitor compensation device according to claim 5, characterized in that, Corresponding to the first capacitor compensation component and the second capacitor compensation component, maintenance doors are respectively provided on the opposite walls of the enclosure.
7. The high-efficiency capacitor compensation device according to claim 6, characterized in that, A transparent observation window is provided on the side wall of the first chamber for observing the operating status of the capacitor compensation component in the second chamber.
8. The high-efficiency capacitor compensation device according to claim 1, characterized in that, It also includes a heat sink, which is disposed on both sides of the second chamber corresponding to the first capacitor compensation component and the second capacitor compensation component, respectively.
9. The high-efficiency capacitor compensation device according to claim 8, characterized in that, The second chamber is also equipped with a surge arrester to protect the capacitor compensation assembly from damage caused by lightning overvoltage and operational overvoltage.
10. The high-efficiency capacitor compensation device according to claim 1, characterized in that, The enclosure has an IP65 protection rating.