CN210007397U - static var compensation generator - Google Patents
static var compensation generator Download PDFInfo
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- CN210007397U CN210007397U CN201920825109.7U CN201920825109U CN210007397U CN 210007397 U CN210007397 U CN 210007397U CN 201920825109 U CN201920825109 U CN 201920825109U CN 210007397 U CN210007397 U CN 210007397U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses an kind of static reactive compensation generator relates to electrical equipment technical field, the utility model discloses a generator box fixed plate is with box space split into space and second space, is provided with the air intake on the fixed plate, and air intake department is provided with connecting piece, hot blast blowpipe apparatus and filter equipment, sends into the second space by hot blast blowpipe apparatus again, and the partition plate is with second space split into third space and fourth space, is provided with control system in the third space, installs reactive current detection unit and carborundum metal oxide field effect transistor bridge circuit in the fourth space, the utility model provides high power density has reduced research and development cost, manufacturing cost and cost of transportation, makes static reactive compensation generator's structure can effectively be simplified simultaneously, has reduced the volume of system, long service life, maintains simply, has effectively promoted electric energy quality in being applied to electric power system.
Description
Technical Field
The utility model relates to an electrical equipment technical field, more specifically say and relate to kinds of static var compensation generators.
Background
Along with the expansion of the capacity of an alternating current power system, the improvement of the voltage grade and the increase of the transmission distance, and along with the attention of the whole world to energy and environmental protection problems, the requirement of people on the quality of electric energy is higher and higher.
In an electric power system, reactive power is which is an important factor influencing voltage stability, the reactive power can increase electric energy loss and influence electric energy quality, and in order to ensure safe, stable and economic operation of the electric power system, a reactive power compensation device is applied to , which is which is an important means for improving power factor of a power grid, reducing reactive power transmission, improving energy utilization rate, saving energy, reducing consumption and improving electric energy quality.
At present, Static Var Compensators (SVCs) and static var compensation generators (SVG/STATCOM) are most applied in the market, the static var compensators are mainly divided into thyristor controlled reactor TCR types, magnetically controlled reactor MCR types and thyristor switched capacitor TSC types, have the characteristics of quick response, flexible control, moderate price and the like, and are reactive compensation devices of most types at present.
However, silicon-based IGBTs are adopted as power elements in a full-bridge circuit of a traditional static var compensation generator, and silicon-based semiconductor elements have two disadvantages that has high switching loss and limited efficiency, the highest efficiency of a typical 20kW reactive generator is limited below 98.6%, the switching frequency is limited by loss, the frequency of is within 20kHz, and the output filter inductance is large in size due to the limitation of low frequency, so that the power density is limited to be increased by steps.
At present, a silicon carbide (SiC) metal oxide field effect transistor (MOSFET) is developed rapidly and is gradually applied to the field of new energy high-power conversion application, especially, a 1200V silicon carbide metal oxide field effect transistor has the characteristics of extremely low switching and conduction loss, high reliability, high voltage resistance, high avalanche breakdown capability and the like compared with a traditional silicon-based IGBT, and brings possibility for miniaturization, simplification, light weight and high efficiency of a power electronic converter system.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects and shortcomings in the prior art, the application provides static var compensation generators, aims to solve the defects and shortcomings in the prior art, and provides static var compensation generators.
In order to solve the problems in the prior art, the method is realized by the following technical scheme:
A static var compensation generator comprises a generator case having a front panel, a rear panel, a bottom plate, a cover plate and two side plates, wherein the front panel is provided with front heat dissipation holes, the rear panel is provided with fan holes and a heat dissipation fan, the heat dissipation fan is installed at the inner side of the rear panel, the generator case is internally provided with a fixed plate, the fixed plate is arranged in parallel with the front panel, the end is connected to the side surface of side, the 1 end is connected to another side plate, the space between the front panel and the rear panel is divided into a th space and a second space, a partition plate is arranged between the fixed plate and the rear panel, the second space is divided into a third space and a fourth space by the partition plate, the end is connected to the fixed plate, the end is connected to the rear panel, the fixed plate is provided with at least two air inlets, the fixed plate is provided with air inlets at positions corresponding to the third space and the fourth space, the air inlets are provided with a connecting part, a filtering device and a hollow air inlet is provided with a connecting part, the filtering device and a filtering device, the filtering device is connected to the filtering device through the connecting part from the front panel to the second space, the filtering device is connected to the filtering device, and the filtering device;
a control system is arranged in the third space, a reactive current detection unit and a silicon carbide metal oxide field effect transistor bridge circuit are arranged in the fourth space, the reactive current detection unit is used for collecting voltage signals and current signals of a power grid, collecting voltage signals and current signals output by a static reactive compensation generator and collecting instantaneous power p-q to obtain reactive current, the reactive current is used as instruction current output by the reactive current detection unit, a modulation signal is obtained after calculation by the control system and is transmitted to the silicon carbide metal oxide field effect transistor bridge circuit to further control the inverter bridge to output corresponding reactive current, a connecting terminal for connecting the reactive current detection unit with the power grid, an alternating current output terminal of the silicon carbide metal oxide field effect transistor bridge circuit and a connecting terminal of the control system are arranged on the front panel, the alternating current output terminal of the silicon carbide metal oxide field effect transistor bridge circuit is connected between a power grid and a load, and reactive current generated by the static reactive compensation generator is transmitted to the power grid and the load to realize reactive compensation; and a connecting terminal of the control system is connected with an external remote monitoring device, so that signal interaction between the control system and a remote control center is realized.
The position department that is close to connecting portion on the connecting piece is provided with the sluice gate that runs through, and sluice gate department is provided with the flashboard, the flashboard passes in the hollow cavity that the sluice gate stretches into the connecting piece along the radial direction of connecting piece for open or close the intercommunication between filter equipment and the hot blast blowpipe apparatus.
The air inlet device comprises an air inlet shell, the air inlet shell comprises an air inlet and an air outlet, the air inlet is connected with a second connecting portion, a second shell is arranged in the air inlet shell, the second shell is fixed in the air inlet shell through a plurality of supporting ribs, an air channel structure for communicating the air inlet with the air outlet is formed between the second shell and the air inlet shell, an fan is arranged at the air inlet of the air inlet shell, a second fan is arranged at the air outlet, a fan is arranged at a position close to the air inlet and used for accelerating the flow of air entering the air inlet, the second fan is arranged at a position close to the air outlet, the air channel structure is arranged between the fan and the second fan, a driving device is arranged in the second shell and used for driving the fan and the second fan to rotate, the air channel structure is arranged into a spiral or annular air channel, a cover body is arranged at the air outlet, and a plurality of air outlets are arranged on the cover body.
The cover plate comprises an th cover body and a second cover body, wherein the th cover body covers the th space, and the second cover body covers the second space.
The filter device is of a multi-level hollow barrel-shaped structure, an opening of the hollow barrel-shaped structure is connected with the connecting part , and air flow filtered by the filter device flows towards the air inlet device on the other side of the air inlet through the hollow position of the filter device.
The reactive current detection unit collects voltage signals of the power grid and the static reactive compensation generator through a voltage transformer and collects current signals of the power grid and the static reactive compensation generator through a current transformer.
The silicon carbide metal oxide field effect transistor bridge circuit comprises 6 silicon carbide metal oxide field effect transistors which are VS1-VS6 respectively, and diodes which are connected in parallel at two ends of each silicon carbide metal oxide field effect transistor to form a three-phase voltage type bridge circuit.
The control system adopts a double closed loop control algorithm of an electric pressure loop and a power loop.
Compared with the prior art, the beneficial technical effects brought by the application are shown in that:
1. the static reactive compensation generator has the advantages that the silicon carbide metal oxide field effect transistor is used as a power device of a full-bridge circuit, high voltage resistance, low on-state resistance, small leakage current, high switching speed, high current density and high temperature resistance are achieved, the stability and the response speed of the whole system of the static reactive compensation generator can be effectively improved by utilizing the high efficiency and the high frequency of a semiconductor device of the silicon carbide metal oxide field effect transistor, the power density is improved, the research and development cost, the production cost and the transportation cost are reduced, meanwhile, the structure of the static reactive compensation generator can be effectively simplified, the size of the system is reduced, the electric energy quality is effectively improved when the static reactive compensation generator is applied to an electric power system, and in the aspects of clean and renewable energy synchronization such as wind energy, solar energy and the like, the structure of the transformer-free static reactive.
2. The fixed plate is additionally arranged in the box body, the air inlet is formed in the fixed plate, the heat dissipation holes in the front plate and the electric elements in the box body are separated through the fixed plate, so that the electric elements are in a closed state, and dust is prevented from entering a closed electric element cavity in the second space. In the box structure, the fixed plate is provided with the air inlet, the filter device and the air inlet device are arranged at the position of the air inlet, the filter device can effectively filter fine particles such as dust and the like in air entering the box from the outside, and the air inlet device can promote airflow outside the box to enter the box through the filter device; the filtering device has the function of filtering fine particles such as dust and the like, and the air inlet device has the function of pressurizing external air flow, so that the air flow outside the box body smoothly enters the box body. The air inlet design of this application can not influence the air input of air inlet, can not be less because of the filter screen hole, and influence the box outside and enter into the jam of the inboard air current of box, can guarantee the box outside effectively and the inboard air convection of box, can not influence the holistic radiating effect of box.
3. The utility model provides an air intake department sets up the connecting piece, set up connecting portion and connecting portion two on the connecting piece, filter equipment connects on connecting portion , air intake device connects on connecting portion two, the connected mode can be threaded connection, also can be buckle formula connection, or the ring flange is connected, the purpose that sets up like this is for conveniently changing filter equipment or air intake device, filter equipment is after using period of time, on its filter core or adsorb tiny granules such as a large amount of dust, long-time use still can influence the air input of air intake, therefore, this application designs independent filter equipment and is connected with connecting portion , can make things convenient for operating personnel or measurement personnel to filter equipment's change, filter equipment under the change also is convenient for wash, operating personnel only need regularly change filter equipment can.
4. The application scene is that during normal work, the flashboard is in a normally open state, namely the lower end of the flashboard is just inserted into the gate opening, but the normal communication between the filtering device and the air inlet device is not influenced, if the filtering device needs to be replaced, the flashboard is only required to be put down to block the communication between the filtering device and the air inlet device, then the filtering device is detached, and after a new filtering device is replaced, the flashboard is opened again to prevent dust from entering the inside of the box body in the process of replacing the filtering device, so that the cleanness of the inside of the box body is kept, meanwhile, the power-off treatment of the air inlet device is not required, the filtering device can be conveniently and quickly replaced, a second space does not need to be opened for replacement, the opening times of the second space is reduced, and the cleanness in the second space can be ensured by steps.
5. The air intake device is provided with a th fan and a second fan, air flow formed by driving air flows to an air outlet and is exhausted by using the th fan and the second fan, the speed of the air flow entering the box body can be increased, the air pressure can be strengthened to the filtered air flow by using the th fan and the second fan, and the air intake quantity of an air inlet can meet the heat dissipation requirement.
Drawings
Fig. 1 is a schematic perspective view of a static var compensation generator according to the present invention;
fig. 2 is a schematic top view of the cover of the present invention after being opened;
FIG. 3 is a schematic structural view of the air inlet of the fixing plate of the present invention;
fig. 4 is an exploded view of the air inlet device of the present invention;
fig. 5 is a schematic block diagram of the static var compensation generator of the present invention;
FIG. 6 is a schematic block diagram of a silicon carbide MOSFET bridge circuit according to the present invention;
fig. 7 is the reactive current detection unit and the control system of the present invention.
Reference numeral 1, a box body, 2, a front panel, 3, a rear panel, 4, a bottom plate, 5, a cover plate, 6, th cover body, 7, a second cover body, 8, a side plate, 9, a front heat dissipation hole, 10, a connection terminal, 11, an alternating current output terminal, 12, a heat dissipation fan, 13, a fixing plate, 14, th space, 15, a second space, 16, a partition plate, 17, a third space, 18, a fourth space, 19, an air inlet, 20, a connection piece, 21, a filter device, 22, an air inlet device, 23, a connection part , 24, a connection part two, 25, a gate, 26, a gate, 27, an air inlet shell, 28, an air inlet, 29, an air outlet, 30, a second shell, 31, a support rib, 32, an air channel structure, 33, a th fan, 34, a second fan, 35, a driving device, 36, a cover body, 37, an air outlet hole, 38, a connection terminal, 39, a control system, 40, a reactive current detection unit, 41 and a silicon carbide metal oxide bridge.
Detailed Description
The technical hidden rod in the embodiment of the present invention will be described clearly and completely with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a partial embodiment of the information of the present invention, and not a whole embodiment, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
With reference to fig. 1 and 2 of the specification, the present embodiment discloses a static var compensation generator, which includes a generator case 1, the case 1 has a front panel 2, a rear panel 3, a bottom plate 4, a cover plate 5 and two side plates 8, the front panel 2 is provided with front heat dissipation holes 9, the rear panel 3 is provided with fan holes and a heat dissipation fan 12, the heat dissipation fan 12 is installed inside the rear panel 3, the case 1 is provided with a fixing plate 13, the fixing plate 13 is arranged parallel to the front panel 2, a end is connected to a side surface of 0 side, another 1 end is connected to another side plate 8, the space between the front panel 2 and the rear panel 3 is divided into a -th space 14 and a second heat dissipation hole 15, a partition plate 16 is arranged between the fixing plate 13 and the rear panel 3, the partition plate 16 divides the second space 15 into a third space 17 and a fourth space 18, the partition plate end is connected to the fixing plate 13, another end is connected to the rear panel 3, the fixing plate 13 is provided with at least two air inlets 19, the fixing plate 13 is provided with a third space 17 and a fourth space 18, a filter device 20 is provided with a filter device 20, a filter device 20 is arranged at a filter space 20, a 3621 is arranged in the filter space 20, a filter space 20 is arranged in the filter space, a 3621, a connecting part 20 is arranged in the filter space 20, a 3621, a connecting part 20 is arranged in the filter device 20, a 3621 is arranged in the filter space 20, a filter device 20 is arranged in the filter space 20, a hollow connecting part 20, a connecting part 20 is arranged in the filter space 20, a 36;
a control system 39 is arranged in the third space 17, a reactive current detection unit 40 and a silicon carbide mosfet bridge circuit 41 are arranged in the fourth space 18, the reactive current detection unit 40 is used for collecting voltage signals and current signals of a power grid, collecting voltage signals and current signals output by a static reactive compensation generator, and collecting instantaneous power p-q to obtain reactive current, the reactive current is used as instruction current output by the reactive current detection unit 40, a modulation signal is obtained after calculation by the control system 39 and is transmitted to the silicon carbide mosfet bridge circuit 41 to control an inverter bridge to output corresponding reactive current, a wiring terminal 10 connected with the power grid by the reactive current detection unit 40, an alternating current output terminal 11 of the silicon carbide mosfet bridge circuit 41 and the control system 39 are arranged on the front panel 2 The ac output terminal 11 of the silicon carbide mosfet bridge circuit 41 is connected between the grid and the load, and the reactive current generated by the static var compensation generator is transmitted to the grid and the load to realize reactive compensation; and a connecting terminal 38 of the control system 39 is connected with an external remote monitoring device, so that signal interaction between the control system 39 and a remote control center is realized.
Further , referring to fig. 3 and 4 of the specification, the connecting member 20 is provided with a through gate 25 at a position close to the connecting portion 23, the gate 25 is provided with a shutter 26, and the shutter 26 extends into the hollow cavity of the connecting member 20 through the gate 25 along the radial direction of the connecting member 20 to open or close the communication between the filter device 21 and the air intake device 22.
The air inlet device 22 comprises an air inlet housing 27, the air inlet housing 27 comprises an air inlet 28 and an air outlet 29, the air inlet 28 is connected with a second connecting portion 24, a second housing 30 is arranged in the air inlet housing 27, the second housing 30 is fixed in the air inlet housing 27 through a plurality of support ribs 31, an air duct structure 32 for communicating the air inlet 28 with the air outlet 29 is formed between the second housing 30 and the air inlet housing 27, an -th fan 33 is arranged at the air inlet 28 of the air inlet housing 27, a second fan 34 is arranged at the air outlet 29, the -th fan 33 is arranged at a position close to the air inlet 28 to accelerate air flow entering the air inlet 28, the second fan 34 is arranged at a position close to the air outlet 29, the air duct structure 32 is arranged between the -th fan 33 and the second fan 34, a driving device 35 is arranged in the second housing 30, the driving device 35 is used for driving the -th fan 33 and the second fan 34 to rotate, the air duct structure 32 is arranged at a spiral air duct or annular air duct, a plurality of air outlets 36 are arranged at the air outlet 29, and a plurality of air outlet holes 37 are.
The cover plate 5 comprises an th cover 6 and a second cover 7, the th cover 6 covers the th space 14, the second cover 7 covers the second space 15, the filter device 21 is of a multi-level and hollow barrel-shaped structure, an opening of the hollow barrel-shaped structure is connected with the connecting portion 23, and the air flow filtered by the filter device 21 flows towards the air intake device 22 on the other side of the air inlet 19 through the hollow position of the filter device 21.
In this embodiment, the remote monitoring device includes a monitoring interface screen and an operation interface screen that are connected to each other, the remote monitoring device is an existing device, and the remote monitoring device serves as a signal transfer station, sends an operation signal of the control system 39 to the remote monitoring center, receives an instruction of the remote monitoring center, and transmits the instruction to the control system 39. The monitoring interface screen and the operation interface screen are existing equipment.
In this embodiment, the reactive current detection unit 40 collects voltage signals of the grid and the static var compensation generator through a voltage transformer (PT) and collects current signals of the grid and the static var compensation generator through a Current Transformer (CT).
In the present embodiment, the silicon carbide mosfet bridge circuit 41 includes 6 silicon carbide mosfets, each being VS1-VS6, and diodes connected in parallel at two ends of each silicon carbide mosfet to form a three-phase voltage type bridge circuit, as shown in fig. 6, wherein VS1 is connected in series with VS2, VS3 is connected in series with VS4, VS5 is connected in series with VS6, and is connected in parallel with the storage capacitor C, and two ends of each silicon carbide mosfet are connected in parallel with diodes, and output is performed between VS1 and VS2 through a filter reactor L1, output is performed between VS3 and VS4 through a filter reactor L2, and output is performed between VS5 and VS6 through a filter reactor L3.
The utility model discloses draw load reactive current and adopt instantaneous power p-q method to calculate, utilize the harmonic to draw the testing process of principle instantaneous reactive current detecting element 40 as shown in FIG. 7, specifically include:
the three-phase voltage is converted into a two-phase static coordinate system through CLARKE to obtain e α and e β, and the three-phase load current is converted into the two-phase static coordinate system through CLARKE to obtain iL α and iL β.
And under a two-phase static coordinate system, obtaining the active power p and the reactive power q of the load through p-q conversion.
The reactive power q of the load is transmitted as a command of the static var compensation generator to the control system 39 for corresponding control. The control system 39 of the static var compensation generator obtains a modulation signal after calculation by using a double closed loop control algorithm of an electric voltage loop and a power loop, and the calculation method of the control system 39 is shown in fig. 7.
The method comprises the steps that a voltage outer ring controls direct-current bus voltage and provides stable direct-current voltage support for a static reactive compensation generator, direct-current feedback voltage Udf is subtracted from a direct-current voltage command Udref to obtain an error, the error is subjected to PI control to obtain an active power command pref, real-time feedback active power pf can be obtained by the output current of the static reactive compensation generator and the voltage of a power grid after instantaneous power p-q conversion is obtained, feedback power pf is subtracted from an active power command pref of feedback reactive power qf. to obtain active control quantity p through PI calculation, reactive power q is obtained by the reactive power command qref after feedback reactive power qf is subtracted, reactive control quantity q is obtained through PI calculation, and control quantities ic α and ic β are obtained through p-q inverse conversion.
The resulting ica and ic β are fed to a space vector pulse width modulation unit (SVPWM) to generate corresponding pulse width modulation signals (PWM) and drive the corresponding silicon carbide mosfet bridge circuit 41 to generate the required reactive current.
The present invention is not limited to the above embodiments, and any variations, modifications, and substitutions that may occur to those skilled in the art may be made without departing from the spirit of the present invention.
Claims (8)
1, kind of static reactive compensation generator, including the generator housing (1), the said housing (1) has front panel (2), rear panel (3), bottom plate (4), cover plate (5) and two lateral plates (8), there are front louvres (9) on the front panel (2), there are fan holes and radiator fans (12) on the rear panel (3), the radiator fans (12) are installed inside rear panel (3), wherein there are dead plates (13) in the said housing (1), the said dead plate (13) is parallel to the front panel (2) and set up, end is connected on side, end is connected on another side lateral plate (8) of louvres, divide the space between front panel (2) and rear panel (3) into the space (14) and second space (15), there are separation plates (16) between dead plate (13) and rear panel (3), the said separation plates (16) divide the second space (15) into the third space (17) and the fourth space (14) and the second space (15), the said filter space (19) is located in the said filter space (19), the said filter space (19) and filter device (19), there are connected to the said filter device (19) by the said intake air intake space (19), the said connecting portion (19) and filter device (19), the connecting portion (19) is located in the said connecting portion (19), the said connecting portion (19) of the said connecting portion (19), the said connecting portion (19) of the said second space (19), the connecting portion (19) and filter device (19), the connecting portion (19) of the second space (19), the connecting portion (19) of the second space (19), the connecting portion (19) of the connecting portion (19) and the connecting portion (19), the connecting portion (19) of the second space (19), the connecting portion (19) of the air intake;
a control system (39) is arranged in the third space (17), a reactive current detection unit (40) and a silicon carbide metal oxide field effect transistor bridge circuit (41) are installed in the fourth space (18), the reactive current detection unit (40) is used for collecting voltage signals and current signals of a power grid, collecting voltage signals and current signals output by a static reactive compensation generator and collecting instantaneous power p-q to obtain reactive current, the reactive current is used as instruction current output by the reactive current detection unit (40), a modulation signal is obtained after calculation through the control system (39) and is transmitted to the silicon carbide metal oxide field effect transistor bridge circuit (41) to further control the inverter bridge to output corresponding reactive current, a wiring terminal (10) for connecting the reactive current detection unit (40) with the power grid and a wiring terminal (10) for connecting the reactive current detection unit (40) with the power grid are arranged on the front panel (2), The alternating current output terminal (11) of the silicon carbide metal oxide field effect transistor bridge circuit (41) and the connecting terminal (38) of the control system (39), the alternating current output terminal (11) of the silicon carbide metal oxide field effect transistor bridge circuit (41) is connected between a power grid and a load, and reactive current generated by the static reactive compensation generator is transmitted to the power grid and the load to realize reactive compensation; and a connecting terminal (38) of the control system (39) is connected with an external remote monitoring device, so that signal interaction between the control system (39) and a remote control center is realized.
2. static var compensation generator according to claim 1, wherein the connecting member (20) is provided with a through gate (25) at a position close to the connecting portion (23), the gate (25) is provided with a shutter (26), and the shutter (26) extends through the gate (25) into the hollow cavity of the connecting member (20) in the radial direction of the connecting member (20) for opening or closing the communication between the filter unit (21) and the air intake unit (22).
3. The static var compensation generator according to claim 1 or 2, wherein the air intake device (22) comprises an air intake housing (27), the air intake housing (27) comprises an air intake (28) and an air outlet (29), the air intake (28) is connected with a second connecting portion (24), a second housing (30) is arranged in the air intake housing (27), the second housing (30) is fixed in the air intake housing (27) through a plurality of support ribs (31), an air duct structure (32) for communicating the air intake (28) with the air outlet (29) is formed between the second housing (30) and the air intake housing (27), a fan (33) is arranged at the air intake (28) of the air intake housing (27), a second fan (34) is arranged at the air outlet (29), the fan (33) is arranged at a position close to the air intake (28) for accelerating the air flow entering the air intake (28), the second fan (34) is arranged at a position close to the air outlet (29), a spiral fan (34) is arranged between the second fan (34) and the air outlet (34), and a plurality of spiral fan structures (35) are arranged for driving the air duct structure (35) or a plurality of spiral fans (34) for driving the air duct structure (35) and a plurality of spiral fan (53932) are arranged in the air duct structure (34).
4. static var compensation generator according to claim 1 or 2, wherein the cover plate (5) comprises a cover (6) and a second cover (7), the cover (6) covers the space (14), and the second cover (7) covers the second space (15).
5. static var compensation generator according to claim 1 or 2, wherein the filter unit (21) is of multi-stage and hollow barrel structure, the opening of the hollow barrel structure is connected with the connecting portion (23), the air flow filtered by the filter unit (21) flows through the hollow position of the filter unit (21) to the air intake unit (22) on the other side of the air intake (19).
6. The kind of SVG of claim 1, wherein the reactive current detection unit (40) collects the voltage signals of the grid and SVG through a voltage transformer, and collects the current signals of the grid and SVG through a current transformer.
7. The SVG according to claim 1, wherein said SiC MOSFET bridge circuits (41) comprise 6 SiC MOSFETs, VS1-VS6, respectively, and diodes connected in parallel across each SiC MOSFET to form a three-phase voltage-type bridge circuit.
8. static var compensation generator according to claim 1, wherein the control system (39) employs a double closed loop control algorithm with voltage and power loops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920825109.7U CN210007397U (en) | 2019-06-03 | 2019-06-03 | static var compensation generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920825109.7U CN210007397U (en) | 2019-06-03 | 2019-06-03 | static var compensation generator |
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| Publication Number | Publication Date |
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| CN210007397U true CN210007397U (en) | 2020-01-31 |
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| CN201920825109.7U Active CN210007397U (en) | 2019-06-03 | 2019-06-03 | static var compensation generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114597909A (en) * | 2022-03-11 | 2022-06-07 | 江苏迈赫电力科技有限公司 | Power distribution static reactive compensation generator and method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114597909A (en) * | 2022-03-11 | 2022-06-07 | 江苏迈赫电力科技有限公司 | Power distribution static reactive compensation generator and method thereof |
| CN114597909B (en) * | 2022-03-11 | 2022-11-29 | 江苏迈赫电力科技有限公司 | Power distribution static reactive compensation generator and method thereof |
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