Air-cooled SVG

Abstract

An air-cooled SVG (static var generator) comprises a container and a power valve tower arranged in the container, the power valve tower comprises a plurality of double-H-bridge series power modules, each double-H-bridge series power module is formed by integrating two single-H-bridge power modules, and the power valve tower is arranged close to one side in the container; ventilation openings are formed in the bottom of the container. The electric reactor and the power valve tower are located on the same side in the container, and the electric reactor is arranged behind the power valve tower; the air cooling equipment is fixed on the container, is positioned on the same side in the container with the power valve tower, and is arranged behind the electric reactor; the soft start module is located on the side, away from the power valve tower, in the container and electrically connected with the power valve tower; the control system and the soft start module are located on the same side in the container, and the control system is arranged in front of the soft start module and electrically connected with the power valve tower, the air cooling equipment and the soft start module. According to the utility model, the requirements of reasonable layout, compact structure, small occupied area and simple and rapid installation and maintenance of the air-cooled SVG equipment can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of reactive power compensation devices, in particular to an air-cooled SVG. Background Art

[0002] With the rapid development of renewable energy power generation in recent years, land resources have become increasingly scarce and construction costs have gradually increased. Therefore, the requirements for the integration, cost, and floor space of air-cooled SVGs have become increasingly stringent. At present, the power modules in the SVG equipment on the domestic market adopt a single H-bridge structure, and the volume occupied by the power valve tower in the whole machine space is relatively large. Since the power module it adopts is a single H-bridge structure, the size of the whole machine is large. In order to ensure its heat dissipation efficiency, its fan power will also be relatively large. Therefore, the existing air-cooled outdoor SVG is at a disadvantage in terms of floor space, whole machine cost, and power consumption. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an air-cooled SVG, which can meet the requirements of reasonable layout, compact structure, small footprint, simple and quick installation and maintenance of air-cooled SVG equipment.

[0004] According to the first embodiment of the utility model, the air-cooled SVG includes a container and:

[0005] A power valve tower, comprising a plurality of double H-bridge series power modules, wherein the double H-bridge series power modules are integrated from two single H-bridge power modules, and the power valve tower is arranged close to one side of the container; a vent is arranged at the bottom of the container;

[0006] A reactor, located on the same side of the container as the power valve tower and arranged behind the power valve tower;

[0007] An air cooling device is fixed on the container, is located on the same side of the container as the power valve tower, and is arranged behind the reactor;

[0008] A soft start module is located in the container at a side away from the power valve tower and is electrically connected to the power valve tower;

[0009] The control system is located at the same side of the container as the soft start module and is arranged in front of the soft start module, and is electrically connected to the power valve tower, the air cooling device and the soft start module respectively.

[0010] The air-cooled SVG according to the embodiment of the utility model has at least the following gain effects:

[0011] The embodiment of the utility model adopts multiple dual H-bridge series power modules to be arranged in the power valve tower. Compared with the method of arranging the power valve tower with a single H-bridge power module, the integration is improved and the footprint of the power module is greatly reduced. In addition, the air-cooled SVG of the embodiment of the utility model integrates the power valve tower, the inductor, the air-cooling equipment, the soft start module and the control system in the container, with high integration, compact structure, reasonable layout, small footprint, and almost no installation is required at the customer's site. The installation process and maintenance are simple and quick. Compared with the traditional SVG, it not only reduces the footprint, but also has great advantages in cost.

[0012] According to some embodiments of the present invention, the vent is located in front of the power valve tower.

[0013] According to some embodiments of the present invention, the air-cooled SVG further includes a vent filter assembly, which is disposed at the vent and is used to filter the air flowing through the vent.

[0014] According to some embodiments of the utility model, the soft start module includes an incoming line isolation knife, a contactor, and a soft start resistor unit; the incoming line isolation knife is used to connect or disconnect the three-phase power supply of the connected device; the contactor has three groups of connecting contacts, the input ends of the three groups of connecting contacts are connected one-to-one with the three phases of the three-phase power supply, and the output ends of the three groups of connecting contacts are connected to the power valve tower via a three-phase circuit; the soft start resistor unit is connected in parallel with the contactor.

[0015] According to some embodiments of the present invention, the soft-start resistor unit includes two soft-start resistors, and the two soft-start resistors are respectively connected in parallel with the two groups of connection contacts.

[0016] According to some embodiments of the utility model, the multiple double H-bridge series power modules in the power valve tower are arranged in six layers and three rows, and every two of the six layers are connected to one phase of the three-phase circuit, and each layer is provided with three double H-bridge series power modules.

[0017] According to some embodiments of the present invention, the air-cooled SVG further includes a lightning arrester connected between the soft start module and the container body, and the lightning arrester is disposed in the container.

[0018] According to some embodiments of the present invention, the air cooling device adopts a centrifugal fan without a volute.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the internal structure of the air-cooled SVG in one embodiment of the utility model at a certain viewing angle;

[0022] Figure 2 This is a schematic diagram of the internal structure of the air-cooled SVG according to an embodiment of the utility model from another perspective;

[0023] Figure 3 This is an internal front view of the air-cooled SVG according to an embodiment of the utility model;

[0024] Figure 4 This is an overall top view of the air-cooled SVG according to an embodiment of the present utility model.

[0025] Reference numerals:

[0026] Container 100 , power valve tower 110 , double H-bridge series power module 111 , reactor 120 , air cooling device 130 , vent 140 , incoming line spacer 151 , contactor 152 , soft start resistor 153 , control system 160 , lightning arrester 170 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present utility model, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly stated, terms such as limitation, setting, installation, connection, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model based on the specific content of the technical solution.

[0031] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only part of the embodiments of the present utility model, not all of the embodiments.

[0032] Refer to the following Figures 1 to 4 The air-cooled SVG according to the embodiment of the present application is described.

[0033] The air-cooled SVG of the utility model, such as Figures 1 to 4 As shown, it includes a container 100 and a power valve tower 110, a reactor 120, an air cooling device 130, a soft start module and a control system 160 arranged in the container 100;

[0034] The power valve tower 110 includes a plurality of double H-bridge series power modules 111, which are formed by integrating two single H-bridge power modules. The power valve tower 110 is arranged near one side of the container 100. A vent 140 is arranged at the bottom of the container 100.

[0035] The reactor 120 is located on the same side of the container 100 as the power valve tower 110 and is arranged behind the power valve tower 110;

[0036] The air cooling device 130 is fixed on the container 100 and is located on the same side of the container 100 as the power valve tower 110 and is arranged behind the reactor 120;

[0037] The soft start module is located at a side of the container 100 away from the power valve tower 110 and is electrically connected to the power valve tower 110;

[0038] The control system 160 is located at the same side of the container 100 as the soft start module and is arranged in front of the soft start module, and is electrically connected to the power valve tower 110, the air cooling device 130, and the soft start module respectively.

[0039] In the embodiment of the utility model, a plurality of double H-bridge series power modules 111 are arranged in the power valve tower 110. Compared with the method of setting the power valve tower 110 with a single H-bridge power module, the integration is improved and the footprint of the power module is greatly reduced. In addition, the air-cooled SVG of the embodiment of the utility model integrates the power valve tower 110, the inductor 120, the air-cooling device 130, the soft start module and the control system 160 in the container 100, with high integration, compact structure, reasonable layout, small footprint, and almost no installation is required at the customer's site. The installation process and maintenance are simple and quick. Compared with the traditional SVG, not only the footprint is reduced, but also the cost is greatly advantageous.

[0040] In some embodiments, Figure 2As shown, the vent 140 is located in front of the power valve tower 110. The vent 140 is arranged at the bottom of the container 100 and is located in front of the power valve tower 110, while the air cooling device 130 is arranged on the wall of the container 100 behind the power valve tower 110 and is located at the upper part of the container 100. Such a position setting can make the air flow through the entire power valve tower 110 better to achieve a better air cooling effect.

[0041] In some embodiments, Figure 2 As shown, when the air cooling device 130 starts to work, when the air cooling device 130 is an exhaust device, the air duct path during operation is that the external low-temperature wind passes through the vent 140 at the lower front of the power valve tower 110 and enters the container 100. After the cold air enters the power valve tower 110, it flows from bottom to top, and can take away the heat generated during the operation of the multiple double H-bridge series power modules 111 in the power valve tower 110. After the air flows out of the power module, it is discharged outside the container 100 by the air cooling device 130.

[0042] In some embodiments, Figure 2 As shown, the air-cooled SVG further includes a vent filter assembly, which is disposed at the vent 140 and is used to filter the air flowing through the vent 140. The vent filter assembly can filter dust, gravel and other impurities in the air flowing through the vents, filter and clean the gas flowing through the container 100, thereby helping to keep the inside of the air-cooled SVG device clean and reduce the wear of dust, gravel and other impurities on internal components. The vent filter assembly can use filter cotton, which needs to be cleaned in time, at least once a week, to ensure the filtering effect.

[0043] In some embodiments, Figure 1As shown, the soft start module includes an incoming line spacer 151, a contactor 152, and a soft start resistor unit; the incoming line spacer 151 is used to connect or disconnect the three-phase power supply of the access device; the contactor 152 has three groups of connection contacts, the input ends of the three groups of connection contacts are connected to the three phases of the three-phase power supply in a one-to-one correspondence, and the output ends of the three groups of connection contacts are connected to the power valve tower 110 through the three-phase circuit; the soft start resistor unit is connected in parallel with the contactor 152. The soft start module is located on the side of the container 100 away from the power valve tower 110, and the soft start module includes an incoming line spacer 151, a contactor 152, and a soft start resistor unit. Among them, the incoming line spacer 151 is located at the top and is used to connect to the three-phase power supply. The spacer is a switch used to isolate the circuit and is used to cut off the path of the circuit so that the electrical equipment is disconnected from the external power supply. When the spacer is disconnected, the circuit is in a disconnected state, and no current flows through, which is safer. When the spacer is closed, the circuit will be turned on and connected to the three-phase power supply. The contactor 152 is located below the incoming line spacer 151, and has three groups of connection contacts. The input ends of the three groups of connection contacts are connected to the three phases A, B, and C of the three-phase power supply in a one-to-one correspondence, and the output ends of the three groups of connection contacts are connected to the power valve tower 110 through the three-phase circuit. The contactor 152 is an automatic control appliance used to connect or disconnect the AC, DC main circuit and control circuit, and has the advantages of zero-voltage protection, large control capacity, reliable operation, and long life. The soft-start resistor unit is connected in parallel with the contactor 152 to limit the large current generated at the moment the circuit is connected, and protect the circuit. The soft-start module can achieve smooth startup of the equipment, reduce current shock, and improve equipment reliability.

[0044] In some embodiments, Figure 1 As shown, the soft-start resistor unit includes two soft-start resistors 153, and the two soft-start resistors 153 are respectively connected in parallel with two groups of connection contacts. One soft-start resistor 153 is connected between the input end and the output end of one connection contact of the contactor 152, and the input ends of the three groups of connection contacts are connected to the three phases A, B, and C of the three-phase power supply in a one-to-one correspondence. The two soft-start resistors 153 can be installed in the A and B phases or the B and C phases.

[0045] In some embodiments, the power module is a series power module, and two conventional single H-bridge power modules are integrated into a double H-bridge series power module 111 . A plurality of double H-bridge series power modules 111 are disposed in the power valve tower 110 .

[0046] In some embodiments, Figure 3As shown, the multiple double H-bridge series power modules 111 in the power valve tower 110 are arranged in six layers and three columns, and every two layers of the six layers are connected to one phase of the three-phase circuit, wherein each layer is provided with three double H-bridge series power modules 111. The double H-bridge series power module 111 is integrated from two single H-bridge power modules, which reduces the floor space and has high integration. The multiple double H-bridge series power modules 111 in the power valve tower 110 are arranged in six layers and three columns, and every two layers are connected to one phase of the three-phase circuit A, B, and C, and one phase has six double H-bridge series power modules 111. In some cases, the number of double H-bridge series power modules 111 in each phase can be changed to five or four according to usage requirements.

[0047] In some embodiments, Figure 3 As shown, the multiple double H-bridge series power modules 111 in the power valve tower 110 are arranged in six layers and three columns, each of the three columns is connected to one phase of the three-phase circuit, and each column is provided with six double H-bridge series power modules 111. The double H-bridge series power module 111 is integrated from two single H-bridge power modules, which reduces the floor space and has high integration. The multiple double H-bridge series power modules 111 in the power valve tower 110 are arranged in six layers and three columns, each column is connected to one phase of the three-phase circuit A, B, and C, and one phase has six double H-bridge series power modules 111. In some cases, the number of double H-bridge series power modules 111 in each phase can be changed to five or four according to usage requirements.

[0048] In some embodiments, Figure 1 As shown, the air-cooled SVG further includes a lightning arrester 170 connected between the soft start module and the container 100, and the lightning arrester 170 is disposed in the container 100. The lightning arrester 170 is disposed in the air-cooled SVG to provide lightning protection for the entire device, prevent dangerous accidents from occurring, and better ensure the safe operation of the device.

[0049] In some embodiments, the air cooling device 130 uses a volute-free centrifugal fan. The air duct path during the operation of the device is that the low-temperature external wind passes through the vent 140 at the lower front of the power valve tower 110 and enters the container 100. After the cold air enters the power valve tower 110, it flows from bottom to top, and can take away the heat generated by the operation of the multiple double H-bridge series power modules 111 in the power valve tower 110. After the air flows out of the power module, it is excluded from the outside of the container 100 by the volute-free centrifugal fan. Centrifugal fans are widely used in equipment in the industrial and construction fields and have many advantages. Centrifugal fans can provide efficient ventilation and air circulation, and can accelerate air by rotating the centrifugal wheel at high speed, thereby providing efficient ventilation and air circulation. Secondly, centrifugal fans can save energy and reduce costs, and are usually more energy-efficient than other types of fans because they can provide more efficient air flow. In addition, centrifugal fans can provide silent operation and reduce noise. The noise generated by the centrifugal wheel when rotating can be absorbed by the casing, which is usually quieter than other types of fans.

[0050] In order to better describe the air-cooled SVG of the embodiment of the utility model, it is further described here by way of a specific embodiment.

[0051] refer to Figures 1 to 4 As shown, the air-cooled SVG includes a container 100 and a power valve tower 110, a reactor 120, a centrifugal fan without a volute, a soft start module, a control system 160 and a lightning arrester 170 arranged in the container 100, wherein the power valve tower 110, the reactor 120 and the centrifugal fan without a volute are arranged on the right side of the container 100, and the soft start module and the control system 160 are arranged on the left side of the container 100; the power valve tower 110 is arranged at the left front of the container 100; the reactor 120 is arranged behind the power valve tower 110; the centrifugal fan without a volute is arranged on the upper side of the back plate of the container 100 and is located at the reactor 120. 0; a vent 140 is provided on the bottom plate of the container 100 in front of the power valve tower 110, and a filter cotton is provided at the vent 140 to filter the air flowing through; the control system 160 is arranged in the right front of the container 100 and is located on the right side of the power valve tower 110; the soft start module is located at the rear of the control system 160, and the soft start module includes an incoming line partition 151, a contactor 152 and two soft start resistors 153, the incoming line partition 151 is located at the top, and the contactor 152 and the soft start resistor 153 are located below the incoming line partition 151; the lightning arrester 170 is arranged below the contactor 152.

[0052] The power valve tower 110 is arranged in six layers and three rows with multiple double H-bridge series power modules 111. Every two layers of the six layers are connected to one phase of the three-phase circuit A, B, and C, and each layer is provided with three double H-bridge series power modules 111. The double H-bridge series power module 111 is integrated from two single H-bridge power modules.

[0053] The external A, B, and C three-phase cables are first connected to the incoming line spacer 151, and then connected to the parallel contactor 152 and the soft start resistor 153 through the copper busbar, and then connected to the A, B, and C three-phases composed of multiple double H-bridge series power modules 111 in the power valve tower 110, and finally enter the reactor 120. The lightning arrester 170 is connected between the soft start module and the container 100. Two soft start resistors 153 are installed on the B and C phases or the A and B phases.

[0054] The air duct path during the operation of the air-cooled SVG is that the low-temperature external wind enters the container 100 through the vent 140 at the lower front of the power valve tower 110. After the cold air enters the power valve tower 110, it flows from bottom to top, and can take away the heat generated by the operation of the multiple double H-bridge series power modules 111 in the power valve tower 110. After the air flows out of the power module, it is discharged outside the container 100 by the voluteless centrifugal fan.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, the present invention is not limited to the above embodiments. Those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air-cooled SVG, characterized in that: Including containers and the following installed in containers: A power valve tower, comprising a plurality of double H-bridge series power modules, wherein the double H-bridge series power modules are integrated from two single H-bridge power modules, and the power valve tower is arranged close to one side of the container; a vent is arranged at the bottom of the container; A reactor, located on the same side of the container as the power valve tower and arranged behind the power valve tower; An air cooling device is fixed on the container, is located on the same side of the container as the power valve tower, and is arranged behind the reactor; A soft start module is located in the container at a side away from the power valve tower and is electrically connected to the power valve tower; The control system is located at the same side of the container as the soft start module and is arranged in front of the soft start module, and is electrically connected to the power valve tower, the air cooling device and the soft start module respectively.

2. The air-cooled SVG according to claim 1, characterized in that: The vent is located in front of the power valve tower.

3. The air-cooled SVG according to claim 2, characterized in that: The air-cooled SVG further includes a vent filter assembly, which is disposed at the vent and configured to filter air flowing through the vent.

4. The air-cooled SVG according to claim 1, characterized in that: The soft start module includes an incoming line isolation knife, a contactor, and a soft start resistor unit; the incoming line isolation knife is used to connect or disconnect the three-phase power supply of the connected device; the contactor has three groups of connection contacts, the input ends of the three groups of connection contacts are connected to the three phases of the three-phase power supply in a one-to-one correspondence, and the output ends of the three groups of connection contacts are connected to the power valve tower via a three-phase circuit; the soft start resistor unit is connected in parallel with the contactor.

5. The air-cooled SVG according to claim 4, characterized in that: The soft-start resistor unit includes two soft-start resistors, and the two soft-start resistors are respectively connected in parallel with the two groups of connection contacts.

6. The air-cooled SVG according to claim 4, characterized in that: The plurality of double H-bridge series power modules in the power valve tower are arranged in six layers and three rows, and every two of the six layers are connected to one phase of the three-phase circuit, wherein each layer is provided with three double H-bridge series power modules.

7. The air-cooled SVG according to claim 1, characterized in that: The air-cooled SVG further includes a lightning arrester connected between the soft start module and the container body, and the lightning arrester is arranged in the container.

8. The air-cooled SVG according to claim 1, characterized in that: The air cooling device adopts a centrifugal fan without a volute.

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