An intelligent reactive power compensation cabinet
By designing intelligent reactive power compensation cabinets and using components such as current transformers and circuit breakers to accurately control current, the problems of low power factor and high cost of traditional reactive power compensation cabinets are solved, and the active power of the power grid is improved and economic benefits are increased.
Patent Information
- Application Number
- CN202010788998.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-08-07
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2040-08-07
AI Technical Summary
Traditional reactive power compensation cabinets cannot effectively reduce the power factor of power users, increase reactive power loss, and the device is large in size and high in cost.
An intelligent reactive power compensation cabinet is designed, including a capacitor chamber, a metering chamber, a outlet chamber and a line inlet chamber. Through components such as current transformer, fuse-type isolation switch and small circuit breaker, precise control and distribution of current is achieved, and reactive power is provided to the inductive load equipment nearby to ensure the safe operation of the power grid.
The proportion of active power in the power grid is increased, the design capacity of power generation equipment is reduced, the line loss rate is reduced, and the economic benefits of power supply companies are increased.
Smart Images
Figure CN112072485B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of reactive power compensation cabinets, and in particular to an intelligent reactive power compensation cabinet. Background Art
[0002] The optimized compensation technology of intelligent reactive power compensation devices can improve the power factor of power-consuming enterprises, reduce reactive power loss, so as to meet the requirements of users for power quality. At the same time, for the safe operation of the power grid, the reactive power load power is balanced. In a low-voltage power supply system, the function of a low-voltage reactive power compensation device is to provide reactive power to inductive load devices nearby. By detecting the operating parameters of the power grid, reducing the calculation amount, improving the accuracy of power grid parameter identification, and switching capacitor banks according to the control law, the quality of the regional power grid voltage is improved to achieve the reactive power stability of the power system. The modularization and integration of complete sets of reactive power compensation devices are realized. The volume of complete sets of reactive power compensation devices is reduced, and the material cost is reduced; intelligent reactive power compensation devices adopt integrated power capacitors to improve the compensation accuracy of complete sets of reactive power compensation devices and increase the market share. The proportional constant of active power in the power grid is increased, the design capacity of power generation and power supply equipment is reduced, the investment is reduced, the power factor is improved, and the line loss rate is reduced, thereby increasing the distribution ratio of active power in the power grid and increasing the economic benefits of power supply enterprises. For this reason, we propose an intelligent reactive power compensation cabinet. Summary of the Invention
[0003] An intelligent reactive power compensation cabinet proposed by the present invention solves the problems that the traditional reactive power compensation cabinet cannot reduce the power factor of power-consuming enterprises, reduce reactive power loss, and cannot improve and simplify the device, reduce the volume, and lower the cost.
[0004] In order to achieve the above object, the present invention adopts the following technical solutions:
[0005] An intelligent reactive power compensation cabinet, comprising a cabinet body. Two hoisting installation brackets are fixedly connected to the top of the cabinet body. An instrument door is installed on the left side of the front of the cabinet body. An incoming line chamber instrument door is installed on the right side of the front of the cabinet body. Angle irons are fixedly connected to both sides of the cabinet body. A plurality of heat dissipation windows are fixedly connected to both sides of the cabinet body. Two rear doors are connected to the back of the cabinet body. A capacitor chamber is provided on the left side inside the cabinet body. Thirteen capacitor chamber installation beams are fixedly connected to the top of the capacitor chamber. A large partition between the capacitor chamber and the metering chamber, which is fixedly connected to the bottom of the cabinet body, is provided on the right side of the capacitor chamber. A mounting sheath is fixedly connected to the right side of the large partition between the capacitor chamber and the metering chamber. An outgoing line chamber and a metering chamber are provided on the right side of the capacitor chamber. A metering chamber partition, which is fixedly connected to the bottom of the cabinet body, is provided between the outgoing line chamber and the metering chamber. Three knock-out holes are fixedly connected to the inside of the outgoing line chamber. Three outgoing line chamber installation beams are fixedly connected to the top of the outgoing line chamber. A second partition is fixedly connected to the front of the outgoing line chamber. An incoming line chamber is provided on the front of the second partition. Three incoming line chamber installation beams are fixedly connected to the top of the incoming line chamber. Four incoming line chamber current transformer installation beams are fixedly connected to the inside of the incoming line chamber. A reactive power compensation automatic controller is fixedly connected to the inside of the cabinet body. A fuse-disconnector switch is connected to the inside of the reactive power compensation automatic controller. A measuring current transformer is connected below the fuse-disconnector switch. A third miniature circuit breaker is connected below the measuring current transformer. A surge protector is connected below the third miniature circuit breaker. A first residual current operated circuit breaker is connected below the fuse-disconnector switch. A second residual current operated circuit breaker is connected below the measuring current transformer. A third residual current operated circuit breaker is connected below the measuring current transformer. A main circuit breaker for capacitor protection is connected below the measuring current transformer. A first miniature circuit breaker is connected below the main circuit breaker for capacitor protection. A first composite switch is connected below the first miniature circuit breaker. A first low-voltage power capacitor is connected below the first composite switch. A second miniature circuit breaker is connected below the main circuit breaker for capacitor protection. A second composite switch is connected below the second miniature circuit breaker. A second low-voltage power capacitor is connected below the second composite switch. A metal oxide arrester is connected below the main circuit breaker for capacitor protection.
[0006] Preferably, a plurality of lead seals are provided outside the incoming line chamber instrument door.
[0007] Preferably, a plurality of heat dissipation holes are provided on both sides of the cabinet body. A plurality of first threaded holes are provided outside the heat dissipation holes. A plurality of second threaded holes are provided outside the heat dissipation windows. Bolts are threadedly sleeved in the first threaded holes and the second threaded holes.
[0008] Preferably, a first handle is fixedly connected to the outside of the instrument door, a second handle is fixedly connected to the outside of the instrument door of the incoming line chamber, and two second handles are fixedly connected to the outside of the rear door.
[0009] Preferably, a plurality of hinges are fixedly connected to both sides of the cabinet body, and the instrument door, the instrument door of the incoming line chamber and the rear door are connected to the cabinet body through the hinges.
[0010] Preferably, a plurality of nameplate mounting holes are provided on the outside of the instrument door of the incoming line chamber.
[0011] Compared with the existing technology, the beneficial effects of the present invention are as follows: By installing structures such as current transformers, fuse disconnecting switches, miniature circuit breakers, capacitors to protect the main circuit breaker, and residual operating current circuit breakers, once the voltage is too low, the fuse disconnecting switch closes. According to the magnitude of the current displayed on the current transformer, different branches are selected, and the excess current is utilized, stored, and released to ensure the provision of reactive power to inductive load equipment nearby and guarantee the safe operation of the power grid. This invention has a novel design and a simple structure, increases the proportional constant of active power in the power grid, reduces the design capacity of power generation and supply equipment, reduces investment, improves the power factor, reduces the line loss rate, thereby increasing the distribution ratio of active power in the power grid and increasing the economic benefits of power supply enterprises. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a front view structural schematic diagram of an intelligent reactive power compensation cabinet proposed by the present invention;
[0013] Figure 2 is a side view structural schematic diagram of an intelligent reactive power compensation cabinet proposed by the present invention;
[0014] Figure 3 is a top view structural schematic diagram of an intelligent reactive power compensation cabinet proposed by the present invention;
[0015] Figure 4 is a three-dimensional view of the large partition between the capacitor chamber and the metering chamber of an intelligent reactive power compensation cabinet proposed by the present invention;
[0016] Figure 5 is a primary system diagram of a 400kVA pole-mounted transformer JP cabinet of an intelligent reactive power compensation cabinet proposed by the present invention;
[0017] Figure 6 is a primary system diagram of a 200kVA pole-mounted transformer JP cabinet of an intelligent reactive power compensation cabinet proposed by the present invention;
[0018] Figure 7 is a schematic diagram of the low-voltage JP cabinet power distribution system principle of an intelligent reactive power compensation cabinet proposed by the present invention.
[0019] In the figure: 1 nameplate mounting hole, 2 sheath installation, 3 capacitor chamber, 4 knockout hole, 5 outgoing line box,
[0020] 6 incoming line chamber, 7 instrument door of incoming line chamber, 8 second partition board, 9 metering chamber, 10 large partition board between capacitor chamber and metering chamber, 11 instrument door, 16 hoisting and mounting bracket, 17 angle iron, 18 cabinet body, 21 heat dissipation window, 22 fuse disconnecting switch, 23 second low-voltage power capacitor, 24 first low-voltage power capacitor, 25 second composite switch, 26 first composite switch, 27 metal oxide arrester, 28 second miniature circuit breaker, 29 first miniature circuit breaker, 30 main circuit breaker for capacitor protection, 31 second residual current operated circuit breaker, 32 third residual current operated circuit breaker, 33 first residual current operated circuit breaker, 34 third miniature circuit breaker, 35 surge protector, 36 measuring current transformer. Detailed implementation manners
[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.
[0022] Refer to Figure 1-7, an intelligent reactive power compensation cabinet, including a cabinet body 18, two hoisting installation brackets 16 are fixedly connected to the top of the cabinet body 18, an instrument door 11 is installed on the left side of the front of the cabinet body 18, an incoming line chamber instrument door 7 is installed on the right side of the front of the cabinet body 18, angle irons 17 are fixedly connected to both sides of the cabinet body 18, a plurality of heat dissipation windows 21 are fixedly connected to both sides of the cabinet body 18, two rear doors are connected to the back of the cabinet body 18, a capacitor chamber 3 is provided on the left side inside the cabinet body 18, thirteen capacitor chamber installation beams are fixedly connected to the top of the capacitor chamber 3, a large partition between the capacitor chamber and the metering chamber 10 fixedly connected to the bottom of the cabinet body 18 is provided on the right side of the capacitor chamber 3, a mounting sheath 2 is fixedly connected to the right side of the large partition between the capacitor chamber and the metering chamber 10, an outgoing line chamber 5 and a metering chamber 9 are provided on the right side of the capacitor chamber 3, a metering chamber partition fixedly connected to the bottom of the cabinet body 18 is provided between the outgoing line chamber 5 and the metering chamber 9, three knock-out holes 4 are fixedly connected to the inside of the outgoing line chamber 5, three outgoing line chamber installation beams are fixedly connected to the top of the outgoing line chamber 5, a second partition 8 is fixedly connected to the front of the outgoing line chamber 5, an incoming line chamber 6 is provided on the front of the second partition 8, three incoming line chamber installation beams are fixedly connected to the top of the incoming line chamber 6, four incoming line chamber current transformer installation beams are fixedly connected to the inside of the incoming line chamber 6, a reactive power compensation automatic controller is fixedly connected to the inside of the cabinet body 18, a fuse-disconnecting switch 22 is connected to the inside of the reactive power compensation automatic controller, a measuring current transformer 36 is connected below the fuse-disconnecting switch 22, a third mini circuit breaker 34 is connected below the measuring current transformer 36, a surge protector 35 is connected below the third mini circuit breaker 34, a first residual current operated circuit breaker 33 is connected below the fuse-disconnecting switch 22, a second residual current operated circuit breaker 31 is connected below the measuring current transformer 36, a third residual current operated circuit breaker 32 is connected below the measuring current transformer 36, a capacitor protection main circuit breaker 30 is connected below the measuring current transformer 36, a first mini circuit breaker 29 is connected below the capacitor protection main circuit breaker 30, a first composite switch 26 is connected below the first mini circuit breaker 29, a first low voltage power capacitor 24 is connected below the first composite switch 26, a second mini circuit breaker 28 is connected below the capacitor protection main circuit breaker 30, a second composite switch 25 is connected below the second mini circuit breaker 28, a second low voltage power capacitor 23 is connected below the second composite switch 25, and a metal oxide arrester 27 is connected below the capacitor protection main circuit breaker 30.
[0023] In this embodiment, a plurality of lead seals are provided outside the incoming line chamber instrument door 7.
[0024] In this embodiment, a plurality of heat dissipation holes are provided on both sides of the cabinet body 18, a plurality of first threaded holes are provided outside the heat dissipation holes, a plurality of second threaded holes are provided outside the heat dissipation window 21, and bolts are threadedly sleeved in the first threaded holes and the second threaded holes.
[0025] In this embodiment, a first handle is fixedly connected to the outside of the instrument door 11, a second handle is fixedly connected to the outside of the instrument door 7 in the incoming line chamber, and two second handles are fixedly connected to the outside of the rear door.
[0026] In this embodiment, a plurality of hinges are fixedly connected to both sides of the cabinet body 18, and the instrument door 11, the instrument door 7 in the incoming line chamber and the rear door are connected to the cabinet body 18 through the hinges.
[0027] In this embodiment, a plurality of nameplate mounting holes are provided on the outside of the instrument door 7 in the incoming line chamber.
[0028] Working principle: First, when the voltage in the cabinet is too low, the fuse disconnecting switch 22 closes, and the current passes through the circuit to reach the measuring current transformer 36. Then, different branch circuits are selected according to the magnitude of the reading displayed on the measuring current transformer 36. When the reading is high, only the third miniature circuit breaker 34 closes, and other circuits are closed. Then the current passes through the third miniature circuit breaker 34 to reach the surge protector 35 to realize the protection of the circuit. When the reading of the measuring current transformer 36 is within the specified range, the second residual current operated circuit breaker 31, the third residual current operated circuit breaker 32 and the first residual current operated circuit breaker 33 close, and other branch circuits are disconnected. The current passes through the second residual current operated circuit breaker 31, the third residual current operated circuit breaker 32 and the first residual current operated circuit breaker 33 respectively, and then acts on the corresponding positions. When the reading of the measuring current transformer 36 is lower than the specified range, the capacitor protection main circuit breaker 30 closes, and other branch circuits are disconnected. The current passes through the capacitor protection main circuit breaker 30, and then the current is divided into two paths. One path of current passes through the first miniature circuit breaker 29, then through the first composite switch 26, and finally enters the first low-voltage power capacitor 24. The other path of current passes through the second miniature circuit breaker 28, then through the second composite switch 25, and finally enters the second low-voltage power capacitor 23. Then the excess current passes through the metal oxide arrester 27 to prevent the occurrence of electric leakage danger.
[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.
Claims
1. An intelligent reactive power compensation cabinet, comprising a cabinet body (18), characterized in that, Two hoisting mounting brackets (16) are fixedly connected to the top of the cabinet body (18). An instrument door (11) is installed on the left side of the front of the cabinet body (18). An incoming line chamber instrument door (7) is installed on the right side of the front of the cabinet body (18). Angle irons (17) are fixedly connected to both sides of the cabinet body (18). A plurality of heat dissipation windows (21) are fixedly connected to both sides of the cabinet body (18). Two rear doors are connected to the back of the cabinet body (18). A capacitor chamber (3) is provided on the left side inside the cabinet body (18). Thirteen capacitor chamber mounting beams are fixedly connected to the top of the capacitor chamber (3). A large partition board between the capacitor chamber and the metering chamber (10) which is fixedly connected to the bottom of the cabinet body (18) is provided on the right side of the capacitor chamber (3). A mounting sheath (2) is fixedly connected to the right side of the large partition board between the capacitor chamber and the metering chamber (10). An outgoing line chamber (5) and a metering chamber (9) are provided on the right side of the capacitor chamber (3). A metering chamber partition board which is fixedly connected to the bottom of the cabinet body (18) is provided between the outgoing line chamber (5) and the metering chamber (9). Three knock-out holes (4) are fixedly connected to the inside of the outgoing line chamber (5). Three outgoing line chamber mounting beams are fixedly connected to the top of the outgoing line chamber (5). A second partition board (8) is fixedly connected to the front of the outgoing line chamber (5). An incoming line chamber (6) is provided on the front of the second partition board (8). Three incoming line chamber mounting beams are fixedly connected to the top of the incoming line chamber (6). Four incoming line chamber current transformer mounting beams are fixedly connected to the inside of the incoming line chamber (6). A reactive power compensation automatic controller is fixedly connected to the inside of the cabinet body (18). A fuse-disconnector switch (22) is connected to the inside of the reactive power compensation automatic controller. A measuring current transformer (36) is connected below the fuse-disconnector switch (22). A third mini circuit breaker (34) is connected below the measuring current transformer (36). A surge protector (35) is connected below the third mini circuit breaker (34). A first residual current operated circuit breaker (33) is connected below the fuse-disconnector switch (22). A second residual current operated circuit breaker (31) is connected below the measuring current transformer (36). A third residual current operated circuit breaker (32) is connected below the measuring current transformer (36). A capacitor protection main circuit breaker (30) is connected below the measuring current transformer (36). A first mini circuit breaker (29) is connected below the capacitor protection main circuit breaker (30). A first composite switch (26) is connected below the first mini circuit breaker (29). A first low-voltage power capacitor (24) is connected below the first composite switch (26). A second mini circuit breaker (28) is connected below the capacitor protection main circuit breaker (30). A second composite switch (25) is connected below the second mini circuit breaker (28). A second low-voltage power capacitor (23) is connected below the second composite switch (25). A metal oxide arrester (27) is connected below the capacitor protection main circuit breaker (30).
2. The intelligent reactive power compensation cabinet according to claim 1, characterized in that, A plurality of lead seals are provided outside the incoming line chamber instrument door (7).
3. An intelligent reactive power compensation cabinet according to claim 1, characterized in that, A plurality of heat dissipation holes are formed on both sides of the cabinet body (18), a plurality of first threaded holes are formed outside the heat dissipation holes, a plurality of second threaded holes are formed outside the heat dissipation window (21), and bolts are threadedly sleeved in the first threaded holes and the second threaded holes.
4. An intelligent reactive power compensation cabinet according to claim 1, characterized in that, A first handle is fixedly connected to the outside of the instrument door (11), a second handle is fixedly connected to the outside of the incoming line chamber instrument door (7), and two second handles are fixedly connected to the outside of the rear door.
5. An intelligent reactive power compensation cabinet according to claim 1, characterized in that, A plurality of hinges are fixedly connected to both sides of the cabinet body (18), and the instrument door (11), the incoming line chamber instrument door (7) and the rear door are connected to the cabinet body (18) through the hinges.
6. The intelligent reactive power compensation cabinet according to claim 1, characterized in that, A plurality of nameplate mounting holes are formed outside the incoming line chamber instrument door (7).
Citation Information
Patent Citations
Intelligent reactive compensation cabinet
CN212485865U