Compact direct-hanging water-cooling SVG device
By using a compact design that divides the container into high-pressure and low-pressure compartments and optimizes the layout, the problems of insufficient space utilization and low heat dissipation efficiency of existing SVG devices are solved, achieving high power density and simplified wiring and maintenance.
Patent Information
- Application Number
- CN202422739486.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-09
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-09
AI Technical Summary
The existing 35kV direct-connected water-cooled SVG unit does not make full use of the internal space of the container, resulting in excessive length or narrow width, low heat dissipation efficiency, complicated wiring, and inconvenient maintenance.
The compact design separates the water-cooled power unit, water chiller, and control cabinet into two compartments and optimizes their layout within a single container. The space is divided into high-pressure and low-pressure compartments using a bulkhead. The water-cooled power unit is arranged horizontally to simplify wiring. Air conditioning is used to directly cool the components, and the water and fiber optic cabling paths are optimized.
It achieves efficient utilization of the container's internal space, increases power density, simplifies wiring and maintenance processes, and reduces costs and heat dissipation efficiency.
Smart Images
Figure CN223528305U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of static var generators, in particular to a compact directly-hung water-cooled SVG device. BACKGROUND
[0002] With the rapid development of the national economy, the power consumption is getting larger and larger. In order to meet the requirements of sustainable development, the proportion of new energy power generation in the power grid is getting higher and higher, and the power quality of the power grid is also being required higher and higher. The SVG (static var generator) device based on power electronic power devices has been widely used in the power grid, especially in the fields of wind power and photovoltaic power generation. The environment of general wind farms and photovoltaic power stations is relatively harsh. For the conventional air-cooled SVG device, because it needs to be ventilated with the outdoor environment, it is designed as a non-fully-closed type. The dust, sand, rain, snow, high temperature, high humidity, salt spray and other harsh environments will seriously affect the reliability and service life of the SVG device, and increase the maintenance cost. Therefore, more and more wind farms and photovoltaic power stations use water-cooled SVG devices. In the eighteen major power grid anti-accident measures of State Grid Corporation of China (2018 revised edition), it is clearly required that "newly operated SVG devices should adopt fully-closed air conditioning refrigeration or fully-closed water-cooled heat dissipation mode". Because the fully-closed air conditioning refrigeration will generate a large amount of electricity, especially for large-capacity SVG devices, therefore, at present, new energy power stations generally use fully-closed water-cooled SVG devices. At the same time, the SVG device adopts a container arrangement, a standardized design, does not need to cover a house, has low civil engineering cost, fast on-site construction and simple arrangement. This kind of container arrangement is also more and more favored by the owners.
[0003] At present, the 35kV directly-hung water-cooled SVG device has many internal power units. The power units are arranged in a straight line inside the container. This results in a relatively long length of the container, especially for medium and large-capacity complete machines. Once the length of the container exceeds 12.2 meters (about 40 feet) or 13.3 meters (the length of a domestic semi-trailer flat car is 17.5 meters), considering transportation, it needs to be divided into two containers. This will lead to the complication of internal power wiring and optical fiber wiring. Or the power units are arranged face to face or back to back in the width direction. Limited by the width size of the container (the width size of the container is generally not more than 3 meters, and the width of a domestic semi-trailer flat car with a length of 17.5 meters or 13.5 meters is 3 meters), the internal width space is narrow, which is not convenient for the installation and maintenance of the power units. And with the increasing capacity of the SVG container and the increasing power density, the air conditioners installed at the front end and the rear end of the container are not convenient for the heat dissipation of the stray heat of the power units inside the container and the solar heat inside the container, and the heat dissipation efficiency is low. CONTENT OF THE UTILITY MODEL
[0004] Therefore, the purpose of the embodiments of the present application is to provide a compact direct-hung water-cooled SVG device, so as to design several water-cooled power units, a water-cooled machine and a control cabinet in a container through a compact design idea and an optimal layout.
[0005] The technical scheme adopted by the present application to solve the above technical problems is as follows:
[0006] According to an aspect of the embodiments of the present application, a compact direct-hung water-cooled SVG device is provided, which comprises a container;
[0007] A bulkhead plate is arranged in the container, which divides the space in the container into a first cabin and a second cabin along the length direction of the container.
[0008] A three-phase power module is arranged in the first cabin, and each phase power module comprises a plurality of water-cooled power units.
[0009] A water-cooled machine and a control cabinet are arranged in the second cabin, the water-cooled machine has a first water inlet and outlet connected to the power module and a second water inlet and outlet connected to a water-air heat exchanger located outside the container, and the control cabinet is in communication connection with each water-cooled power unit to control each water-cooled power unit.
[0010] In an example, a mounting frame for mounting the three-phase power module is arranged in the first cabin, the mounting frame comprises a vertical column extending along the height direction of the container, a cross beam extending along the width direction of the container and a longitudinal beam extending along the length direction of the container.
[0011] In an example, the front face of each phase power module is arranged corresponding to the front side wall of the container, and a door plate corresponding to the first cabin is arranged on the front side wall of the container.
[0012] In an example, an air conditioner is arranged on the front side wall of the container for cooling the devices in the water-cooled power units.
[0013] In an example, a through-wall sleeve is arranged on the rear side wall of the container, and an incoming cable is connected with each phase power module through the through-wall sleeve; and / or, the incoming cable is connected with each phase power module through the floor of the container.
[0014] In an example, the plurality of water-cooled power units in each phase power module are arranged in rows and columns.
[0015] In the two water-cooled power units of the same type, the electrically conductive row input-output interface of one water-cooled power unit is arranged to be inclined to the other water-cooled power unit, and the electrically conductive row input-output interface of the other water-cooled power unit is arranged to be inclined to the one water-cooled power unit.
[0016] In an example, the output ends of each phase power module are connected by a star-connected electrically conductive row, which is arranged close to the rear side wall of the container.
[0017] In an example, the water-cooled machine is connected to each phase power module through a main water inlet pipe and a main water return pipe.
[0018] In an example, the main water inlet pipe and the main water return pipe both extend along the length direction of the container, and each phase power module is further provided with a branch water inlet pipe and a branch water return pipe extending along the height direction of the container, the branch water inlet pipe is connected to the main water inlet pipe, and the branch water return pipe is connected to the main water return pipe.
[0019] In an example, the top of the control cabinet is arranged with a fiber optic cabling support, and the optical fibers connected between the control cabinet and each water-cooled power unit are arranged along the fiber optic cabling support and the inner surface of the front side wall of the container.
[0020] The compact direct-hanging water-cooled SVG device provided by the embodiments of the present application is designed by a compact design idea and an optimal layout, in which a plurality of water-cooled power units, a water-cooled machine and a control cabinet of a power part are designed in a container; the overall structure is compact, the power density is high, the cost is low, the field wiring is convenient, and the water joint installation and maintenance are simple and reliable. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 A compact direct-hanging water-cooled SVG device without a container top plate provided by the embodiments of the present application is shown in the figure;
[0022] Figure 2 A power module inside a high-pressure cabin provided by the embodiments of the present application is shown in the figure;
[0023] Figure 3 An inside view of a low-pressure cabin provided by the embodiments of the present application is shown in the figure;
[0024] Figure 4 A schematic view of one phase power module inside a high-pressure cabin provided by the embodiments of the present application is shown in the figure;
[0025] Figure 5 A schematic view of two adjacent water-cooled power units in one phase power module inside a high-pressure cabin provided by the embodiments of the present application is shown in the figure;
[0026] Figure 6A compact direct-hung water-cooled SVG device after removing the top of the container and the door plate of the high-pressure chamber is provided for the embodiments of the present application.
[0027] Figure 7 Another schematic view of one phase power module inside the high-pressure chamber is provided for the embodiments of the present application.
[0028] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0029] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.
[0030] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" and "several" is two or more.
[0032] As Figures 1-7 shown, the present application provides a compact direct-hung water-cooled SVG device, which includes a container 1, a partition plate 4 is arranged in the container 1, the partition plate 4 divides the space in the container 1 into two chambers along the length direction, i.e. chamber 2 and chamber 3. In the example in the figure, the chamber 2 is assembled with high-voltage devices, such as 35kV devices; and the chamber 3 is assembled with low-voltage devices, such as 380V devices. Therefore, the chamber 2 can be called high-voltage 35kV chamber 2, and the chamber 3 can be called low-voltage 380V chamber 3.
[0033] The high-voltage 35kV cabin 2 is internally arranged with three power modules, namely, a power module 5a, a power module 5b, and a power module 5c. The three power modules are independently arranged in the ABC three-phase sequence along the length direction of the container 1.
[0034] The mounting frame of each phase power module is an insulating frame built by SMC profiles. The mounting frame includes a column 12 extending along the height direction of the container 1, a cross beam 13 extending along the width direction of the container 1, and a longitudinal beam 14 extending along the length direction of the container 1. The bottom of the mounting frame is connected to the floor of the container 1 through an insulator 11, such as a 35kV insulator, and the top of the mounting frame is not structurally connected to the top plate 1d of the container 1.
[0035] A plurality of water-cooled power units 16 are mounted on the mounting frame of each phase power module in a horizontal arrangement. Different hardware and software designs are used, and the number of cascaded power units in each phase is different. The water-cooled power units 16 are arranged in a single-face or back-to-back manner. Different numbers of rows and columns can be arranged on the mounting frame of each phase power module. In this example, a two-column single-face arrangement is used, and in other examples, a multi-column back-to-back arrangement can be used according to requirements.
[0036] The water-cooled power unit 16 is designed in a front-mounted and front-maintained manner, and the installation and maintenance of the water-cooled power unit 16 can be completed from the front face only. When arranged in a back-to-back manner, the distance between the water-cooled power units 16 arranged in a back-to-back manner only needs to consider the required safety distance (electrical clearance and creepage distance) of the maximum number of phases. The design can compress the space occupied by the water-cooled power unit 16 in the container 1 as much as possible to improve the power density of the container 1. The front face of each phase power module corresponds to the front side wall 1a (one of the side walls along the width direction of the container 1) of the container 1. A door panel 8 corresponding to the high-voltage 35kV cabin 2 is provided on the front side wall 1a of the container 1, and the door panel 8 can be used to access the interior of the container 1 for installation and maintenance of the water-cooled power unit 16. A wall-mounted air conditioner 9 is also installed on the front side wall 1a of the container 1. The cold air from the air conditioner 9 can directly blow to the capacitors, single boards, and conductive bars in the water-cooled power unit 16, and the cold air from the air conditioner 9 can be used to the highest extent.
[0037] According to actual requirements on site (such as new projects or renovation projects), the cable inlet of each phase power module can be a wall bushing inlet mode on the upper part of the side wall of the container 1 or a cable inlet mode at the bottom of the container 1.
[0038] The bushing-through of the upper part of the side wall is as follows: a bushing-through 6, for example a 35 kV bushing-through, is installed at the upper part of the rear side wall 1b (the other side wall along the width direction of the container 1) of the container 1. A current sensor 7 is sleeved on one side of the bushing-through 6 located in the inner wall of the container 1. The uppermost water-cooled power unit 16 is the first stage power unit after the bushing-through 6 is wired. The water-cooled power unit 16 at the uppermost layer is connected with the bushing-through 6 through the conductive bar 15. The water-cooled power unit 16 is installed horizontally, and the upper and lower structures are symmetrical. The fiber communication interfaces 161 of the two water-cooled power units 16 are on one side, and the conductive bar input and output interfaces 162 of the two water-cooled power units 16 are on the other side. For example Figure 5 As shown, the conductive bar input and output interface 162 of the water-cooled power unit 16 on the left side is arranged to the right side, that is, arranged to the water-cooled power unit 16 on the right side. The water-cooled power unit 16 on the right side is arranged after the water-cooled power unit 16 on the left side is rotated 180 degrees in the height direction (or rotated 180 degrees clockwise). In this way, the conductive bar input and output interface 162 of the water-cooled power unit 16 on the right side is arranged to the left side, that is, arranged to the water-cooled power unit 16 on the left side. In this way, the conductive bar input and output interfaces 162 of the water-cooled power units 16 on the left and right sides are located at the inner side of the two water-cooled power units 16. In this way, the wiring path of the conductive bar 27 connected in series between the water-cooled power units 16 on the upper and lower sides and the conductive bar 28 connected in series between the water-cooled power units 16 on the left and right sides is short, the heat generated is small, and the cost is low. At the same time, the fiber communication interfaces 161 of the water-cooled power units 16 on the left and right sides are located at the outer side of the two water-cooled power units 16. The fiber can be directly routed into the wire slot fixed on the vertical column 12 on the two sides of the power module. In this way, the fiber and the conductive bar are effectively physically separated, and the possibility of the fiber colliding with the heat-generating conductive bar is eliminated from the source. According to the above manner, the water-cooled power units 16 are connected in series in turn, and the water-cooled power units 16 on the left and right sides are staggered. The last stage water-cooled power unit 16 of each phase power module is at the lowermost layer from top to bottom. The transfer conductive bar 21 is the transfer conductive bar of the last stage water-cooled power unit 16 of each phase power module. The star-connected conductive bar 22 connects the output ends of each phase power module. The star-connected conductive bar 22 is arranged close to the rear side wall 1b of the container 1, that is, away from the side of the door panel 8 of the container 1.
[0039] The cable entry mode of the bottom is as follows: the entry cable 32, for example, a 35kV entry cable, passes through the floor 1c of the container 1, and a current sensor 33 is sleeved on the side of the entry cable 32 located on the inner wall of the container 1, and is connected to the transfer conductive bar 21 of the lowermost water-cooled power unit 16, which is the first-stage power unit after the entry of the entry cable 32. The arrangement of the water-cooled power unit 16 is similar to the through-wall bushing entry mode, and the series-connected water-cooled power units 16 in the through-wall bushing entry mode are connected from top to bottom in an interlaced manner from left to right. The series-connected water-cooled power units 16 in the cable entry mode are connected from bottom to top in an interlaced manner from left to right, and the rest is the same, and the related conductive bar materials can be shared. The last-stage power unit of each-phase power module is located at the uppermost layer, the transfer conductive bar 21 is the transfer conductive bar of the last-stage power unit of each-phase power module, and the output ends of each-phase power module are connected through the star-connected conductive bar 34. The star-connected conductive bar 34 is arranged close to the rear side wall 1b of the container 1, that is, away from the door panel 8 of the container 1.
[0040] The left side wall (one of the side walls in the length direction of the container 1) of the container 1 is provided with the door panel 10 of the low-voltage 380V cabin 3. The water-cooled machine 23 and the control cabinet 24 are arranged inside the low-voltage 380V cabin 3. The water-air heat exchanger outside the container 1 is arranged on the top of the container 1 or beside the container 1.
[0041] The water cooling machine 23 has water inlet and outlet connected to the power module and water inlet and outlet connected to the water-air heat exchanger outside the container 1. The main water inlet pipe 17 to the power module and the main water return pipe 18 from the power module are arranged near the rear side wall 1b of the container 1 (i.e. away from the door panel 8 of the container 1), the interface position of the main water inlet pipe 17 and the interface position of the main water return pipe 18 are both arranged facing the front of each phase power module, and the main water inlet pipe 17 and the main water return pipe 18 both extend along the length direction of the container 1. Three branch water inlet pipes 19 and three branch water return pipes 20 connected to the main water inlet pipe 17 and the main water return pipe 18, the branch water inlet pipes 19 and the branch water return pipes 20 both extend along the height direction of the container 1, and the branch water inlet pipes 19 and the branch water return pipes 20 are arranged at both sides of each phase power module, wherein the branch water inlet pipes 19 are arranged at the front side of each phase power module and extend along the width direction of the container 1 through the lower branch water inlet pipe 191 to the rear side of each phase power module to be connected to the main water inlet pipe 17, and the branch water return pipes 20 are arranged at the rear side of each phase power module and connected to the main water return pipe 18. The branch water pipes go from the lowermost power unit to the uppermost power unit, one side is the water inlet pipe and the other side is the water return pipe, the branch water inlet pipes 19 and the branch water return pipes 20 are fixed to the vertical column 12 by insulation, and the above-mentioned branch water inlet pipes 19 and branch water return pipes 20 are arranged with the same number of water nozzle joints as each column of power units, and the water cooled power units 16 also have the same water nozzle joints, the branch water inlet pipes 19 and the water cooled power units 16 are connected by using the shaped hose 29 with quick plug joints, the shaped hose 30 connects between two adjacent water cooled power units 16, and the shaped hose 31 connects the water cooled power unit 16 and the branch water return pipe 20. The above-mentioned water cooling machine 23 to each phase power module has a simple and short pipe path, low flow resistance, far away from the door panel 8 and maintenance channel of the container 1, and ensures that the corresponding water pipes will not be touched during installation and maintenance of the water cooled power units 16. The water inlet and outlet of the water-air heat exchanger outside the container 1 are arranged near the rear side wall 1b of the container 1, which can be connected to the water-air heat exchanger arranged beside the container or on the top of the container through the water pipe, such as stainless steel water pipe.
[0042] The optical fiber communication interface of the main control plug-in box in the control cabinet 24 is connected to the optical fiber communication interface 161 of each water cooled power unit 16 in the high voltage 35kV cabin 2, which is used to control the output voltage and current of each water cooled power unit 16. The optical fiber routing support 25 is arranged on the top of the control cabinet 24, and the optical fiber connected between the control cabinet 24 and each water cooled power unit 16 is arranged along the optical fiber routing support 25, the inner surface of the front side wall 1a of the container 1, the insulation support 26, the longitudinal beam 14 between each phase power module, the vertical column 12 and the cross beam 13, and reaches the optical fiber communication interface 161 of each water cooled power unit 16. The overall optical fiber routing is simple and convenient, and the entire optical fiber routing path perfectly avoids the conductive row of the power unit 16.
[0043] The preferred embodiments of the present application are described above with reference to the accompanying drawings, and are not intended to limit the scope of the present application. Various modifications of the present application can be made by those skilled in the art without departing from the scope and spirit of the present application, for example, features of one embodiment can be used in another embodiment to obtain yet another embodiment. Any modification, equivalent replacement and improvement made within the technical concept of the present application should be within the scope of the present application.
Claims
1. A compact, wall-mounted, water-cooled SVG device, characterized in that, The compact direct-hung water-cooled SVG device comprises a container; A bulkhead is arranged in the container, which divides the space in the container into a first cabin and a second cabin along the length direction of the container; A three-phase power module is arranged in the first cabin, each phase power module comprising a plurality of water-cooled power units; A water cooler and a control cabinet are arranged in the second cabin, the water cooler having a first water inlet and outlet connected to the power module and a second water inlet and outlet connected to a water-air heat exchanger outside the container, and the control cabinet being in communication connection with each water-cooled power unit to control each water-cooled power unit.
2. A compact, wall-hung water cooled SVG device according to claim 1, characterized in that, An installation frame for installing the three-phase power module is arranged in the first cabin, the installation frame comprising a vertical column extending along the height direction of the container, a cross beam extending along the width direction of the container, and a longitudinal beam extending along the length direction of the container.
3. The compact, wall-hung, water-cooled SVG device of claim 1, wherein, The front of each phase power module corresponds to the front side wall of the container, and a door plate corresponding to the first cabin is arranged on the front side wall of the container.
4. The compact, wall-hung, water-cooled SVG device of claim 1, wherein, An air conditioner is arranged on the front side wall of the container for cooling the devices in the water-cooled power units.
5. The compact, wall-hung, water-cooled SVG device of claim 1, wherein, A wall bushing is arranged on the rear side wall of the container, and an incoming cable is connected to each phase power module through the wall bushing; and / or, the incoming cable is connected to each phase power module through the floor of the container.
6. The compact, wall-hung, water-cooled SVG device of claim 1, wherein, The plurality of water-cooled power units in each phase power module are arranged in rows and columns; In the same row, the conductive row input and output interface of one water-cooled power unit is arranged to deviate from the other water-cooled power unit, and the conductive row input and output interface of the other water-cooled power unit is arranged to deviate from the one water-cooled power unit.
7. The compact, wall-hung, water-cooled SVG device of claim 1, wherein, The output ends of each phase power module are connected by a star-connected conductive row arranged close to the rear side wall of the container.
8. The compact, wall-hung, water-cooled SVG device of claim 1, wherein, The water cooler is connected to each phase power module through a main water inlet pipe and a main water return pipe.
9. A compact, wall-hung water cooled SVG device according to claim 8, characterised in that, The main water inlet pipe and the main water return pipe both extend along the length direction of the container, and branch water inlet pipes and branch water return pipes extending along the height direction of the container are further arranged on both sides of each phase power module, the branch water inlet pipes being connected to the main water inlet pipe, and the branch water return pipes being connected to the main water return pipe.
10. The compact, wall-hung, water-cooled SVG device of claim 1, wherein, An optical fiber routing bracket is arranged on the top of the control cabinet, and the optical fibers connected between the control cabinet and each water-cooled power unit are arranged along the optical fiber routing bracket and the inner surface of the front side wall of the container.