Integrated intelligent substation and its distribution cabinet

Abstract

The present invention relates to the technical field of transformers, and in particular to an integrated intelligent substation and a power distribution cabinet thereof. The integrated intelligent substation includes a transformer and a power distribution cabinet. The power distribution cabinet includes a cabinet body. A metering control room, a capacitor room, and an inlet and outlet line room are arranged in the cabinet body. The capacitor room is arranged between the metering control room and the inlet and outlet line room. The capacitor room is provided with reactive power compensation intelligent capacitors arranged in upper and lower layers. An inlet bus is arranged in the inlet and outlet line room. One end of the inlet bus is used to connect to the transformer of the substation, and the other end extends into the inlet and outlet line room. A wire outlet hole is arranged at the bottom, and an inlet module is arranged in the inlet and outlet line room. The control unit and the metering unit in the power distribution are separated from the reactive power compensation intelligent capacitor in the capacitor room, which improves the safety performance of the power distribution cabinet, facilitates user operation, and solves the problem of low user safety factor caused by the capacitor and the metering control unit being arranged in the same compartment in the current power distribution cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to an integrated intelligent transformer substation and a power distribution cabinet thereof. Background Art

[0002] Rural power grids have the characteristics of large seasonal load fluctuations and low average load, which are prone to problems such as excessive reactive power of the power grid and excessive ratio of transformer no-load loss to transmission capacity. The Chinese utility model patent with authorization announcement number CN204348496U and authorization announcement date 2015.05.20 discloses an intelligent on-load capacity-adjusting distribution transformer. Under load conditions, the transformer connection mode is automatically changed according to the load changes, and the transformer is adjusted to a large capacity or a small capacity. It is suitable for places with large seasonal load or periodic load changes. The distribution transformer includes a transformer and an on-load capacity-adjusting tap-changer, an intelligent monitoring unit, a low-voltage outlet line, a separate compensation shunt capacitor, a distribution management terminal, etc. The distribution cabinet has two compartments, wherein the separate compensation shunt capacitor, the public compensation shunt capacitor, the intelligent monitoring unit, and the distribution management terminal are arranged in the same compartment. In actual use, the distribution management terminal opens the cabinet door for operation, but because the separate compensation shunt capacitor and the public compensation shunt capacitor are in the same compartment as the distribution management terminal, it causes the problem of unsafe use. Summary of the invention

[0003] The purpose of the present invention is to provide a power distribution cabinet for a substation to solve the problem of low user safety factor caused by the capacitor and the metering control unit being arranged in the same compartment of the current power distribution cabinet; in addition, the purpose of the present invention is also to provide an integrated intelligent substation to solve the problem of low safety factor of the current substation.

[0004] To achieve the above object, the technical solution of the power distribution cabinet for substation of the present invention is as follows: the power distribution cabinet for substation comprises:

[0005] The cabinet is equipped with a metering control room, a capacitor room, and an inlet and outlet line room arranged on the left and right. The capacitor room is set between the metering control room and the inlet and outlet line room.

[0006] Metering control room: It is equipped with control unit and metering unit.

[0007] Capacitor room: It is equipped with reactive compensation intelligent capacitors arranged in upper and lower layers.

[0008] Incoming and outgoing line room: An incoming line busbar is set inside. One end of the incoming line busbar is used to connect to the transformer of the substation, and the other end extends into the incoming and outgoing line room. A line outlet hole is provided at the bottom, and an incoming line module is provided in the incoming and outgoing line room.

[0009] The beneficial effects of the power distribution cabinet for substations of the present invention are as follows: the power distribution cabinet is located in front of the transformer, which reduces the occupied space of the substation; the metering control room, capacitor room, and inlet and outlet line rooms arranged on the left and right in the power distribution cabinet separate the control unit and the metering unit from the reactive compensation intelligent capacitor in the capacitor room, thereby improving the safety performance of the power distribution cabinet, facilitating user operation, and solving the problem of low user safety factor caused by the capacitor and the metering control unit being arranged in the same compartment in the current power distribution cabinet.

[0010] Furthermore, in order to reduce the volume of the power distribution cabinet, the cabinet door of the metering control room faces the left or right side of the power distribution cabinet, the cabinet door of the capacitor room faces the front side of the power distribution cabinet, and the cabinet door of the inlet and outlet room faces the front side of the power distribution cabinet. Usually, the control unit in the metering control room is relatively wide and relatively thin, and the cabinet door of the metering control room is arranged on the side to reduce the volume of the power distribution cabinet.

[0011] Furthermore, an incoming line protection room is provided on the top of the cabinet, and the incoming line protection room has a heat dissipation port facing the transformer side for the incoming line bus to pass through, and a busbar through-hole connected with the incoming and outgoing line chamber for the busbar to enter the incoming and outgoing line chamber. A seal for sealing the incoming and outgoing line chamber is provided in the busbar through-hole. The heat dissipation port improves the heat dissipation capacity of the cabinet, and at the same time, the incoming line protection room can provide primary protection for the incoming line bus, thereby improving the protection level of the distribution cabinet.

[0012] Furthermore, a protective cover is provided at the connection between the rear side plate of the cabinet and the transformer of the substation, and the front side cover of the protective cover is provided at the heat dissipation port. The rear side plate of the cabinet is provided with a spacing from the transformer and the spacing between the two is communicated with the heat dissipation port. The protective cover further improves the protection of the cabinet without affecting the heat dissipation.

[0013] Furthermore, part of the incoming line protection chamber is embedded in the incoming and outgoing line chamber, and part of the incoming line protection chamber is embedded in the capacitor chamber, which can improve the heat transfer efficiency between the incoming line protection chamber, the capacitor chamber and the incoming and outgoing line chamber, thereby accelerating heat dissipation.

[0014] Furthermore, a capacitor bracket is provided in the capacitor room, and the capacitor bracket can be detachably fixed in the power distribution cabinet, and each reactive power compensation intelligent capacitor is installed on the capacitor bracket, so that the disassembly and assembly of the reactive power compensation intelligent capacitor is convenient.

[0015] Furthermore, the inlet and outlet chamber is provided with a closed busbar connected to the incoming busbar, the closed busbar extends in the left and right directions, a mounting structure for mounting power supply components is provided on the closed busbar, and the incoming module is mounted on the closed busbar, so as to facilitate the installation and maintenance of electrical components.

[0016] To achieve the above purpose, the technical solution of the integrated intelligent substation of the present invention is:

[0017] The transformer station includes: transformer,

[0018] Distribution cabinet: located in front of the transformer.

[0019] The power distribution cabinet includes a cabinet body, in which a metering control room, a capacitor room, and an inlet and outlet line room are arranged on the left and right. The capacitor room is arranged between the metering control room and the inlet and outlet line room.

[0020] Metering control room: It is equipped with control unit and metering unit.

[0021] Capacitor room: It is equipped with reactive compensation intelligent capacitors arranged in upper and lower layers.

[0022] Incoming and outgoing line room: An incoming line busbar is set inside. One end of the incoming line busbar is connected to the transformer, and the other end extends into the incoming and outgoing line room. A line outlet hole is provided at the bottom, and an incoming line module is provided in the incoming and outgoing line room.

[0023] The beneficial effects of the integrated intelligent substation of the present invention are as follows: the distribution cabinet is located in front of the transformer, which reduces the space occupied by the substation. The metering control room, capacitor room, and inlet and outlet line rooms arranged on the left and right sides of the distribution cabinet separate the control unit and the metering unit from the reactive compensation intelligent capacitor in the capacitor room, thereby improving the safety performance of the distribution cabinet, facilitating user operation, and solving the problem of low user safety factor caused by the capacitor and metering control unit being arranged in the same compartment of the current distribution cabinet.

[0024] Furthermore, in order to reduce the volume of the power distribution cabinet, the cabinet door of the metering control room faces the left or right side of the power distribution cabinet, the cabinet door of the capacitor room faces the front side of the power distribution cabinet, and the cabinet door of the inlet and outlet room faces the front side of the power distribution cabinet. Usually, the control unit in the metering control room is relatively wide and relatively thin, and the cabinet door of the metering control room is arranged on the side to reduce the volume of the power distribution cabinet.

[0025] Furthermore, an incoming line protection room is provided on the top of the cabinet, and the incoming line protection room has a heat dissipation port facing the transformer side for the incoming line bus to pass through, and a busbar through-hole connected with the incoming and outgoing line chamber for the busbar to enter the incoming and outgoing line chamber. A seal for sealing the incoming and outgoing line chamber is provided in the busbar through-hole. The heat dissipation port improves the heat dissipation capacity of the cabinet, and at the same time, the incoming line protection room can provide primary protection for the incoming line bus, thereby improving the protection level of the distribution cabinet.

[0026] Furthermore, a protective cover is provided at the connection between the rear side plate of the cabinet and the transformer, the front side cover of the protective cover is provided at the heat dissipation port, the transformer and the rear side plate of the cabinet are spaced apart and the space between the two is communicated with the heat dissipation port. The protective cover further improves the protection of the cabinet while not affecting the heat dissipation.

[0027] Furthermore, part of the incoming line protection chamber is embedded in the incoming and outgoing line chamber, and part of the incoming line protection chamber is embedded in the capacitor chamber, which can improve the heat transfer efficiency between the incoming line protection chamber, the capacitor chamber and the incoming and outgoing line chamber, thereby accelerating heat dissipation.

[0028] Furthermore, a capacitor bracket is provided in the capacitor room, and the capacitor bracket can be detachably fixed in the power distribution cabinet, and each reactive power compensation intelligent capacitor is installed on the capacitor bracket, so that the disassembly and assembly of the reactive power compensation intelligent capacitor is convenient.

[0029] Furthermore, the inlet and outlet chamber is provided with a closed busbar connected to the incoming busbar, the closed busbar extends in the left and right directions, a mounting structure for mounting power supply components is provided on the closed busbar, and the incoming module is mounted on the closed busbar, so as to facilitate the installation and maintenance of electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a specific embodiment of the integrated intelligent substation of the present invention;

[0031] Figure 2 yes Figure 1 Schematic diagram behind the hidden front cabinet door;

[0032] Figure 3 This is a front view of a specific embodiment of the integrated intelligent substation of the present invention with the front cabinet door hidden;

[0033] Figure 4 It is a structural schematic diagram of a specific embodiment of the integrated intelligent substation of the present invention after the front cabinet door and the top cover are hidden;

[0034] Figure 5 It is a schematic diagram of the assembly structure of the reactive power compensation intelligent capacitor and the capacitor bracket in a specific embodiment of the integrated intelligent substation of the present invention;

[0035] Figure 6 It is an assembly structure diagram of a closed busbar and an incoming line module in a specific embodiment of the integrated intelligent substation of the present invention;

[0036] Figure 7 It is a partial structural diagram of a power distribution cabinet in a specific embodiment of the integrated intelligent substation of the present invention;

[0037] Figure 8 It is a schematic diagram of the assembly structure of the incoming busbar and the partition in a specific embodiment of the integrated intelligent substation of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of a partition between an incoming line protection room and an incoming and outgoing line room in a specific embodiment of the integrated intelligent substation of the present invention;

[0039] Fig.10 It is an axonometric diagram of a specific embodiment of the integrated intelligent substation of the present invention;

[0040] In the figure: 1. Transformer; 2. Distribution cabinet; 20. Cabinet; 201. Partition; 21. Metering control room; 211. Cabinet door; 22. Capacitor room; 221. Slide; 222. Limit plate; 223. Limit folding edge; 23. Inlet and outlet room; 231. Heat dissipation hole; 24. Inlet protection room; 241. Heat dissipation port; 242. Busbar perforation; 243. Composite insulator; 244. Sealing ring; 245. Partition; 25. Outlet hole; 26. Protective cover; 3. Inlet bus; 31. Zero-phase incoming bus; 4. Closed bus; 41. Hook; 5. Reactive compensation intelligent capacitor; 6. Capacitor bracket; 61. Base; 62. Support column; 621. Left support column; 622. Right support column; 63. Mounting plate; 64. Controller mounting seat; 7. Capacitor controller; 8. Zero-phase switching switch; 9. Inlet module. DETAILED DESCRIPTION

[0041] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0042] The specific embodiment of the integrated intelligent substation of the present invention is as follows Figures 1 to 4 As shown, the integrated intelligent substation includes a transformer 1 and a power distribution cabinet 2 arranged in front of the transformer 1. The power distribution cabinet 2 includes a cabinet 20. The cabinet 20 is provided with a metering control room 21, a capacitor room 22, an inlet and outlet room 23, and an inlet protection room 24. The metering control room 21, the capacitor room 22, and the inlet and outlet room 23 are arranged on the left and right. The capacitor room 22 is arranged between the metering control room 21 and the inlet and outlet room 23. The inlet protection room 24 is arranged in the middle of the top of the cabinet 20. A part of the inlet protection room 24 is embedded in the inlet and outlet room 23, and a part of it is embedded in the capacitor room 22. The inlet protection room 24 is separated from the capacitor room 22 and the inlet and outlet room 23 by a partition. The inlet protection room 24 is located in the middle of the left and right direction of the cabinet 20, corresponding to the front and back position of the low-voltage outlet of the transformer 1. In other embodiments, the position of the incoming line protection room can be changed according to the position of the low-voltage outlet of the transformer, for example, it can be set on the right or left side of the cabinet. Of course, in other embodiments, the incoming line protection room can also be arranged up and down with the incoming and outgoing line room as needed, and the front side wall of the incoming line protection room is set on the front side plate of the cabinet. The partition between the capacitor chamber 22 and the incoming and outgoing line chamber 23 in this embodiment is used to install electrical components, and the two chambers are not sealed and isolated. In other embodiments, the two compartments can also be sealed and isolated as needed.

[0043] In this embodiment, Figure 7As shown, the incoming line protection chamber 24 is used to protect the incoming line bus 3. The rear side wall of the incoming line protection chamber 24 is arranged on the rear side plate of the cabinet 20, and the top wall of the incoming line protection chamber 24 is arranged on the top plate of the cabinet 20, which simplifies the structure inside the cabinet. An opening is arranged on the rear side wall of the incoming line protection chamber 24, which is a heat dissipation port 241 connected to the outside world for dissipating the heat in the incoming line protection chamber 24. At the same time, the heat dissipation port 241 is also for the incoming line bus 3 to pass through. After the incoming line bus 3 connected to the low-voltage terminal of the transformer enters the incoming line protection chamber 24 through the heat dissipation port, it extends into the incoming and outgoing line chamber 23. The size of the heat dissipation port 241 is larger than the size of the incoming line bus 3 to avoid the heat dissipation port being blocked by the incoming line bus 3. In this embodiment, each incoming line bus shares a long strip of heat dissipation port 241, which is convenient for processing.

[0044] like Figure 8 and Fig. 9 As shown, a busbar through-hole 242 for each phase busbar to pass through is provided on the partition 245 between the inlet and outlet chamber 23 and the inlet protection chamber 24, and a sealing ring 244 is provided in each busbar through-hole 242 to ensure that the pollutants in the inlet protection chamber 24 will not enter the inlet and outlet chamber 23 and the capacitor chamber 22. By setting up the inlet protection chamber 24, the stability of the distribution cabinet 2 and the transformer 1 during transportation is ensured, and at the same time, through the primary protection function of the inlet protection chamber 24, it can play a certain role in blocking moisture, flying insects, dust and other debris, and ensure the sealing protection level of the distribution cabinet. Since there are specified requirements for the fan power in the distribution cabinet, in order to improve the heat dissipation efficiency of the distribution cabinet, the incoming line protection chamber 24 in this embodiment provides preliminary protection for the incoming line busbar, and at the same time, the heat can be dissipated outward through the incoming line protection chamber. The heat in the incoming and outgoing line chamber 23 and the capacitor chamber can be transferred to the incoming line protection chamber 24 through the heat dissipation port 241, thereby increasing the heat dissipation area of ​​the cabinet. At the same time, the heat generated by the incoming line busbar 3 arranged in the incoming line protection chamber 24 can be directly discharged through the heat dissipation port 241. The sealing ring arranged in the busbar perforation of the incoming line protection chamber ensures the sealing level of the cabinet. The incoming line protection chamber also prevents the sealing ring from being directly exposed to the outside of the distribution cabinet, thereby extending the life of the sealing member and reducing the requirements for the material of the sealing member. In other embodiments, according to actual needs, the incoming line protection chamber can also be cancelled, and an incoming line busbar sealing ring can be directly arranged on the rear side panel of the cabinet to protect the incoming line busbar. The sealing ring in this embodiment forms a sealing member that seals the incoming and outgoing line chamber in the busbar perforation. Figure 8 Only the A-phase incoming busbar, B-phase incoming busbar, and C-phase incoming busbar are shown. Figure 3 and Figure 4 As shown, the zero-phase incoming busbar 31 passes through the bottom of the incoming protection chamber into the incoming and outgoing chamber 23. A busbar through-hole for the zero-phase incoming busbar to pass through is provided on the partition at the bottom of the incoming protection chamber 24, and a sealing ring is also provided in the busbar through-hole.

[0045] In this embodiment, the incoming busbar 3 is fixed in the incoming protection chamber 24 by a composite insulator 243, the composite insulator 243 is fixed on the bottom wall of the incoming protection chamber 24, and the incoming busbar 3 is fixed on the top of the composite insulator 243 by bolts. The incoming busbar 3 is electrically connected to the outgoing terminal of the transformer through a copper braid. Compared with fixing the incoming busbar 3 by means of a porcelain bottle, the incoming busbar 3 in this embodiment can have a certain amount of margin, which solves the problem of porcelain bottle breakage caused by busbar pulling porcelain bottle. In other embodiments, under good operating conditions, porcelain bottles can also be used to fix the incoming busbar.

[0046] The current transformer design standard requires that the three-phase line on the low-voltage side be A phase, B phase, and C phase from left to right, while the three-phase line in the distribution cabinet is required to be C phase, B phase, and A phase from left to right. Figure 4 As shown, an incoming busbar 3 is provided in the incoming protection chamber 24, one end of the incoming busbar 3 is connected to the transformer 1, and the other end extends out of the incoming protection chamber 24 and is connected to the busbar in the incoming and outgoing line chamber 23. The incoming busbar 3 is arranged from left to right in the incoming protection chamber 24 as A phase, B phase, and C phase. After entering the incoming and outgoing line chamber 23, it is arranged from left to right as C phase, B phase, and A phase. The specific transposition method and structure of the incoming busbar 3 are prior art and will not be described in detail here.

[0047] like Fig.10 As shown, the rear side plate of the cabinet 20 is provided with a protective cover 26 for connecting with the transformer, the lower side and the front side of the protective cover 26 are both open, the front side cover of the protective cover 26 is provided at the heat dissipation port 241, and the lower side cover is provided at the outlet end of the transformer, and a spacer 201 is provided before and after the transformer and the rear side plate of the cabinet, and the spacer 201 is communicated with the heat dissipation port 241 to ensure that the heat dissipation port 241 is connected with the outside world. The protective cover 26 can better protect the incoming busbar 3. In other embodiments, the transformer may also be provided with no spacer between the transformer and the power distribution cabinet, and the heat dissipation port relies on the heat dissipation holes on the protective cover for heat dissipation.

[0048] A closed busbar 4 is provided in the inlet and outlet chamber 23. The closed busbar 4 extends in the left and right directions. A mounting structure for mounting power supply components is provided on the closed busbar 4. The incoming line module is mounted on the incoming line busbar 3. The closed busbar 4 is a busbar with an insulating layer commonly used in the prior art. It can reduce the spacing between the three-phase busbars in the closed busbar 4. The electrical components connected to the closed busbar 4 are all mounted on the closed busbar 4, which facilitates the installation of the components. In the present embodiment, a zero-phase-changing switch 8 and an incoming line module 9 are mounted on the closed busbar 4. The closed busbar is located at the rear of the zero-phase-changing switch 8 and the incoming line module 9. The specific mounting structure is also prior art. A mounting hole is provided on the closed busbar 4. Figure 6As shown, a conductive hook 41 is provided on the component to be connected to the enclosed busbar 4, and is electrically connected to the enclosed busbar 4 through the conductive hook 41, while being kept in a fixed position by the enclosed busbar 4. In other embodiments, the busbar of the inlet and outlet chamber may not be an enclosed busbar, in which case the busbar structure connected to the electrical components in the inlet and outlet chamber is the same as the inlet busbar structure.

[0049] There is space under the closed busbar 4 to accommodate outgoing cables, such as Figure 2 As shown, a cable outlet hole 25 is provided at the bottom of the inlet and outlet chamber 23, and the outlet cable enters the inlet and outlet chamber 23 through the cable outlet hole 25 and is connected to the corresponding electrical components. The inlet and outlet chamber 23 generates a large amount of heat, and the inlet and outlet chamber 23 is located on one side of the capacitor chamber 22, which is also conducive to heat dissipation. At the same time, in order to ensure the heat dissipation effect, a heat dissipation hole 231 is provided on the side wall of the inlet and outlet chamber 23 away from the capacitor chamber 22. Of course, a fan can also be provided on the side wall to improve the heat exchange efficiency.

[0050] In this embodiment, the capacitor chamber 22 is provided with a reactive compensation intelligent capacitor 5 arranged in upper and lower layers. The reactive compensation intelligent capacitor 5 is small in size and easy to install. In order to further improve the installation and maintenance efficiency, in this embodiment, a capacitor bracket 6 is provided in the capacitor chamber 22, and each reactive compensation intelligent capacitor 5 is installed in layers on the capacitor bracket 6. The capacitor bracket 6 can be detachably fixed in the power distribution cabinet 2. When in use, the capacitor bracket 6 can be moved out of the cabinet 20 as a whole. After the installation and maintenance is completed, the connection between the reactive compensation intelligent capacitors 5 is connected outside the cabinet 20, and then installed as a whole in the capacitor chamber 22. Of course, in other embodiments, the reactive compensation intelligent capacitor can also be directly fixed in the cabinet. When maintenance is required, the reactive compensation intelligent capacitor is directly removed from the cabinet, but the wiring between the reactive compensation intelligent capacitors here is relatively cumbersome and the installation efficiency is low.

[0051] like Figure 5 As shown, the capacitor bracket 6 is a frame structure, including a base 61 and four support columns 62 fixed on the base 61. The capacitor bracket 6 also includes a mounting plate 63 layered above and below the base 61. The reactive compensation smart capacitors 5 on the same layer are arranged left and right, wherein the number of reactive compensation smart capacitors 5 on the upper layer is less than the number of capacitors on the lower layer. Specifically, two reactive compensation smart capacitors 5 are arranged on the upper layer, and three reactive compensation smart capacitors 5 are arranged on the lower layer.

[0052] Three of the reactive compensation intelligent capacitors 5 are fixed on the base 61, and the other two reactive compensation intelligent capacitors 5 are fixed on the top mounting plate 63. In order to minimize the space occupied by the capacitor bracket 6, in this embodiment, two support columns 62 are fixed on the left side of the base 61, and the other two support columns 62 are arranged on the base 61 between the two reactive compensation intelligent capacitors 5. The support column 62 on the left is defined as the left support column 621, and the support column 62 between the two reactive compensation intelligent capacitors 5 is defined as the right support column 622. The spacing between the left support column 621 and the right support column 622 meets the installation requirements of the two reactive compensation intelligent capacitors 5. The two right support columns 622 are fixed to the right side of the mounting plate 63, and the top extends to the top of the mounting plate 63. A controller mounting seat 64 for mounting the capacitor controller 7 is provided on the right support column 622, and the capacitor controller 7 is mounted on the controller mounting seat 64. This design can ensure the fixing strength of the top mounting plate 63 and meet the installation requirements of the capacitor. At the same time, the connection part between the right support column 622 and the base 61 is between the two capacitors. By utilizing the interval between the two capacitors, the space occupied by the right support column 622 is reduced compared to setting the right support column 622 on the right side of the base 61. In addition, the space on the right side of the top of the right support column 622 is used to install the capacitor controller 7, making full use of the space in the capacitor chamber 22, making the capacitor chamber 22 compact. In other embodiments, the structure of the capacitor bracket can be in other forms, such as a box-type structure. In other embodiments, the base and the mounting plate can also be replaced by a fixed cross bar.

[0053] In order to further improve the installation efficiency of capacitors, such as Figure 5 As shown, the capacitor chamber 22 in this embodiment is provided with a slide seat 221 that slides with the base 61 of the capacitor bracket 6 so that the capacitor bracket 6 can be slid into the capacitor chamber 22 when installed. The slide seat 221 is provided with an L-shaped limit plate 222 for limiting the left and right positions of the capacitor bracket 6. The top of the vertical part of the limit plate 222 is provided with a limit fold 223 that limits the upper and lower positions of the capacitor support. In addition, in order to facilitate the installation of the capacitor bracket 6, in this embodiment, the limit fold 223 is only provided on the rear half of the limit plate 222, and the front half is not provided with a limit fold, so as to facilitate the installation of the capacitor bracket 6 on the slide seat 221. After the capacitor bracket 6 slides to the set position, the capacitor bracket 6 is fixed to the slide seat 221 by bolts.

[0054] The limiting fold forms an upper stop structure that cooperates with the upper and lower stops of the capacitor bracket to limit the capacitor bracket from upwardly disengaging from the bracket mounting slide rail. In other embodiments, the upper stop structure can also be a stop pin or a stop block fixed on the limit plate. Of course, the upper stop structure can also be set on the support column. The limit plate forms a horizontal limit structure that cooperates with the left and right stops of the capacitor bracket to limit the left and right movement of the capacitor bracket. In other embodiments, the horizontal limit structure can also be a limit block, or a limit groove can be set on the slide seat, the capacitor bracket is set in the limit groove, and the capacitor bracket can also be set with a slide groove that cooperates with the front and rear guide sliding of the slide seat, and the slide seat is provided with a slide rail that cooperates with the slide groove. The slide seat and the limiting plate in this embodiment jointly form a bracket mounting slide rail that can slide relative to the capacitor bracket before the capacitor bracket is fixed, and the support frame mounting slide rail extends toward the capacitor disassembly cabinet door on the cabinet for disassembling and assembling the capacitor. In other embodiments, the bracket mounting slide rail can also be two tracks fixed in the cabinet at intervals on the left and right.

[0055] In this embodiment, the metering control room 21 is equipped with an intelligent distribution transformer terminal, a user concentrator, an intelligent multifunctional meter, and a GPRS remote transmission module. The intelligent multifunctional meter forms a metering unit in the metering controller, and the intelligent distribution transformer terminal forms a control unit. The types and quantities of metering units and control units can be optionally installed in the metering control room according to actual needs.

[0056] like Figure 4 As shown, in this embodiment, the cabinet door 211 corresponding to the metering control room 21 faces the left side of the power distribution cabinet 2. The width of the control module in the metering control room 21 is large and the thickness is small. The cabinet door 211 of the metering control room 21 is arranged on the side of the power distribution cabinet 2 to reduce the volume of the power distribution cabinet 2. In other embodiments, the cabinet door corresponding to the metering control room can also be arranged on the right side. At this time, the left support column is between the two lower capacitors, and the capacitor controller that controls the capacitor is arranged above the lower capacitor and on the side of the left support column facing the upper capacitor. Of course, under the premise of not pursuing a small volume, the cabinet door can also be arranged on the front side of the cabinet. The cabinet doors of the capacitor chamber 22 and the inlet and outlet chamber 23 are both arranged on the front side of the cabinet for easy operation.

[0057] The substation of the present invention is an intelligent energy-saving integrated substation. The energy-saving on-load voltage- and capacity-adjusting three-phase distribution transformer and the refined reactive power compensation capacitor device arranged in the substation improve the intelligence level of the substation.

[0058] The specific embodiment of the power distribution cabinet for substation of the present invention, the structure of the power distribution cabinet for substation in this embodiment is the same as the structure of the power distribution cabinet in the above embodiment, and will not be repeated.

Claims

1. A power distribution cabinet for a substation, which is located in front of the transformer and is characterized in that: include: The cabinet is equipped with a metering control room, a capacitor room, and an inlet and outlet line room arranged on the left and right. The capacitor room is set between the metering control room and the inlet and outlet line room. Metering control room: It is equipped with control unit and metering unit. Capacitor room: It is equipped with reactive compensation intelligent capacitors arranged in upper and lower layers. Inlet and outlet room: Inlet busbar is set inside, one end of the incoming busbar is used to connect to the transformer of the substation, and the other end extends into the inlet and outlet room. There is an outlet hole at the bottom, and a fan for heat dissipation is set on the side wall; An incoming line protection chamber is provided in the cabinet, the incoming line protection chamber is arranged at the top of the cabinet and is separated from the capacitor chamber and the incoming and outgoing line chamber by a partition, the rear side wall of the incoming line protection chamber is arranged on the rear side plate of the cabinet, a part of the incoming line protection chamber is embedded in the incoming and outgoing line chamber, and a part of the incoming line protection chamber is embedded in the capacitor chamber, a heat dissipation port connected to the outside is arranged on the rear side wall, the heat dissipation port is for the incoming line bus to pass through and be connected to the transformer, the size of the heat dissipation port is larger than the size of the incoming line bus, a busbar through-hole for the incoming line bus to enter the incoming and outgoing line chamber is arranged on the partition between the incoming line protection chamber and the incoming and outgoing line chamber, and a sealing member for sealing the incoming and outgoing line chamber is arranged in the busbar through-hole.

2. The power distribution cabinet for substation according to claim 1, characterized in that: The cabinet door of the metering control room faces the left side or the right side of the power distribution cabinet, the cabinet door of the capacitor room faces the front side of the power distribution cabinet, and the cabinet door of the inlet and outlet line room faces the front side of the power distribution cabinet.

3. The power distribution cabinet for substation according to claim 1 or 2, characterized in that: The rear side plate of the cabinet is used to be provided with a protective cover at the connection with the transformer of the substation, the front side cover of the protective cover is arranged at the heat dissipation port, the rear side plate of the cabinet is used to be spaced apart from the transformer and the space between the two is communicated with the heat dissipation port.

4. The power distribution cabinet for substation according to claim 1 or 2, characterized in that: A capacitor bracket is arranged in the capacitor room, the capacitor bracket can be detachably fixed in the power distribution cabinet, and each reactive power compensation intelligent capacitor is installed on the capacitor bracket.

5. The power distribution cabinet for substation according to claim 1 or 2, characterized in that: A closed busbar connected to the incoming busbar is provided in the incoming and outgoing line chamber, the closed busbar extends in left and right directions, a mounting structure for mounting power supply components is provided on the closed busbar, and the incoming line module is mounted on the closed busbar.

6. The integrated intelligent substation is characterized by: It comprises a transformer and a distribution cabinet, and the distribution cabinet is a distribution cabinet for substations as described in any one of claims 1-5.

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