CN201758288U - 10kV dynamic voltage restorer based on power mould cascade connection - Google Patents
10kV dynamic voltage restorer based on power mould cascade connection Download PDFInfo
- Publication number
- CN201758288U CN201758288U CN2010201550171U CN201020155017U CN201758288U CN 201758288 U CN201758288 U CN 201758288U CN 2010201550171 U CN2010201550171 U CN 2010201550171U CN 201020155017 U CN201020155017 U CN 201020155017U CN 201758288 U CN201758288 U CN 201758288U
- Authority
- CN
- China
- Prior art keywords
- igbt pipe
- power
- output
- pwm
- rectification circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses a 10kV dynamic voltage restorer based on power mould cascade connection, which comprises a single input and multi-output voltage transformer, thirty power moulds, thirty machinery bypass mechanisms, and three LC filter circuits. Each LC filter circuit consists of an inductance and a capacitance connected in series. The single input and multi-output voltage transformer transforms the voltage of the electric grid into thirty channels of three phase voltage, each outputted voltage connected to the input end of a group of power moulds. Ten power moulds form a group, and the output ends of each power mould from a group firstly undergo cascading before being put into connection with an electric grid through a LC filter circuit. The output end of each power mould is in parallel connection with a machinery bypass mechanism. The 10kV dynamic voltage restorer based on power mould cascade connection of the utility model is capable of changing malfunctioning power moulds without turning off the machine equipped with the same.
Description
Technical field
The utility model relates to dynamic electric voltage recovery device in electric power system and the power electronic technology, and (Dynamic Voltage Restorer DVR), particularly relates to a kind of 10kV dynamic electric voltage recovery device based on cascade of power units.
Background technology
Along with the develop rapidly of electronic information technology, sophisticated equipments such as the automatic assembly line of extensive use, precision processing machine, computer system are more and more higher to the requirement of the quality of power supply in the enterprise.Falling temporarily or jumping of line voltage can make these enterprise customers suffer heavy losses.When line voltage took place to fall temporarily or jumps, dynamic electric voltage recovery device (DVR) ensured the quality of voltage of user side by seal in a voltage source in distribution system.
The 10kV dynamic electric voltage recovery device is made of energy storage device, inverter, grid-connecting apparatus etc. usually.Wherein the topological structure of the formation of energy storage device and inverter is the emphasis in the design of 10kV dynamic electric voltage recovery device.Common energy storage device has super capacitor, superconducting energy storage, storage battery, flywheel energy storage etc., is subjected to the restriction of multiple factors such as cost and compensation ability, and these devices are not very practical in present 10kV dynamic electric voltage recovery device structure.When the components and parts of existing 10kV dynamic electric voltage recovery device break down, need to shut down, then equipment is safeguarded, can not realize not shutting down the components and parts of changing fault.
The utility model content
Technical problem to be solved in the utility model provides a kind of 10kV dynamic electric voltage recovery device based on cascade of power units, and it can realize not shutting down replacing fault power unit.
The utility model solves above-mentioned technical problem by following technical proposals: a kind of 10kV dynamic electric voltage recovery device based on cascade of power units, it is characterized in that, it comprises the many output transformers of single input, 30 power cells, 30 mechanical bypass mechanism, three LC filter circuits, each LC filter circuit is formed by an inductance and a capacitances in series, the many output transformers of single input are transformed to 30 tunnel three-phase voltages of exporting with line voltage, and each road output voltage is connected to the input of one group of power cell; Ten power cells are one group, seal in electrical network through a LC filter circuit after the output cascade of each group power cell, the output of each power cell mechanical bypass mechanism in parallel.
Preferably, described power cell comprises first fuse, second fuse, the 3rd fuse, the one PWM rectification circuit, the 2nd PWM rectification circuit, the 3rd PWM rectification circuit, dc capacitor, the one PWM inverter circuit, the 2nd PWM inverter circuit and electronics bypass mechanism, the one PWM rectification circuit comprises the IGBT pipe and the 2nd IGBT pipe of mutual series connection, the 2nd PWM rectification circuit comprises the 3rd IGBT pipe and the 4th IGBT pipe of mutual series connection, the 3rd PWM rectification circuit comprises the 5th IGBT pipe and the 6th IGBT pipe of mutual series connection, first fuse is connected between IGBT pipe and the 2nd IGBT pipe, second fuse is connected between the 3rd IGBT pipe and the 4th IGBT pipe, the 3rd fuse is connected between the 5th IGBT pipe and the 6th IGBT pipe, the one PWM rectification circuit, the 2nd PWM rectification circuit, the 3rd PWM rectification circuit constitutes the three-phase PWM rectification circuit, the one PWM inverter circuit comprises the 7th IGBT pipe and the 8th IGBT pipe of mutual series connection, the 2nd PWM inverter circuit comprises the 9th IGBT pipe and the tenth IGBT pipe of mutual series connection, the one PWM inverter circuit and the 2nd PWM inverter circuit constitute the single-phase PWM inverter circuit, six IGBT pipes of three-phase PWM rectification circuit charge to dc capacitor, the output of dc capacitor connects the single-phase PWM inverter circuit, the output of single-phase PWM inverter circuit is connected to the two ends of electronics bypass mechanism, the electronics bypass mechanism is made of bidirectional triode thyristor, and the output of power cell is received in the output of bidirectional triode thyristor.
Preferably, described three-phase PWM rectification circuit and dc capacitor are formed the energy storage device of power cell.
Preferably, described mechanical bypass mechanism is made up of short circuit copper sheet, insulated connecting rod, trace, rotary handle.
Positive progressive effect of the present utility model is: power cell is inner to adopt conventional IGBT pipe to constitute PWM rectification circuit and PWM inverter circuit, can realize the energy two-way flow, during electric network electric voltage drop, power cell can compensate the load-side electric network electric voltage drop from absorbing the electrical network energy; When line voltage jumped, power cell can absorb the voltage that jumps from load-side, feeds back to electrical network by device, and simultaneously, modular design has improved the maintainability of 10kV dynamic electric voltage recovery device; The cascade of power cell output also can be satisfied the application requirements of 10kV dynamic electric voltage recovery device.The inner three-phase PWM rectification circuit of power cell can reduce the influence of rectification unit to mains by harmonics and power factor (PF); The energy storage device that inner three-phase PWM rectification circuit of power cell and dc capacitor constitute can guarantee line voltage dc capacitor voltage stable when certain limit fluctuate, the compensation ability of raising dynamic electric voltage recovery device.The electronics bypass mechanism that the bidirectional triode thyristor of power cell inside constitutes, can be when power cell breaks down, allow main circuit current flow through through bidirectional triode thyristor, make the element in the fault power unit break away from major loop, when the assurance system breaks down at 1-2 power cell, still can normally move; The mechanical bypass mechanism of outside, fault power unit can be with fault power unit detachment system; What the synergy of electronics bypass mechanism and mechanical bypass mechanism can realize the fault power unit does not shut down replacing, has improved the reliability of 10kV dynamic electric voltage recovery device.
Description of drawings
Fig. 1 is the principle schematic of the utility model based on the 10kV dynamic electric voltage recovery device of cascade of power units.
Fig. 2 is the principle schematic of the utility model based on the power cell in the 10kV dynamic electric voltage recovery device of cascade of power units.
Fig. 3 is the principle schematic of the utility model based on the power cell drawer in the 10kV dynamic electric voltage recovery device of cascade of power units.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
As shown in Figure 1, the utility model comprises 11,30 power cell 30-59 of single many output transformers of input, 30 mechanical bypass mechanism 60-89, a LC filter circuit, the 2nd LC filter circuit and the 3rd LC filter circuits based on the 10kV dynamic electric voltage recovery device of cascade of power units, utilizing the many output transformers 11 of single input is the three-phase voltage of 30 road 690V output with electrical network 10kV voltage transformation, and each road output voltage is connected to the input of one group of power cell; Ten power cells are one group, totally three groups, and difference corresponding electrical network A, B, C phase cascade circuit.The one LC filter circuit comprises the 3rd electric capacity 26 and the 3rd inductance 23 that first electric capacity 24 of mutual series connection and second electric capacity 25 that first inductance, 21, the two LC filter circuits comprise mutual series connection and second inductance, 22, the three LC filter circuits comprise mutual series connection.The output of ten power cell 30-39 of A phase cascade circuit is linked to each other successively, seal in electrical network through a LC filter circuit after the output cascade of ten power cells, simultaneously, the output of each power cell mechanical bypass mechanism 60-69 in parallel; The output of ten power cell 40-49 of B phase cascade circuit is linked to each other successively, output after the output cascade of ten power cells connects seals in electrical network through the 2nd LC filter circuit, simultaneously, the output of each power cell also meets a mechanical bypass mechanism 70-79, in like manner, the output of ten power cell 50-59 of C phase cascade circuit is linked to each other successively, output after the output cascade of ten power cells connects seals in electrical network through the 3rd LC filter circuit, simultaneously, the output of each power cell mechanical bypass mechanism 80-89 in parallel.
As shown in Figure 2, power cell comprises first fuse 111, second fuse 112, the 3rd fuse 113, the one PWM (Pulse Width Modulation, pulse-width modulation) rectification circuit, the 2nd PWM rectification circuit, the 3rd PWM rectification circuit, dc capacitor 131, the one PWM inverter circuit, the 2nd PWM inverter circuit and electronics bypass mechanism, the one PWM rectification circuit comprises IGBT pipe (the Insulated Gate Bipolar Transistor of mutual series connection, three bipolar-type power pipes insulate) the 121 and the 2nd IGBT pipe 122, the 2nd PWM rectification circuit comprises the 3rd IGBT pipe the 123 and the 4th IGBT pipe 124 of mutual series connection, the 3rd PWM rectification circuit comprises the 5th IGBT pipe the 125 and the 6th IGBT pipe 126 of mutual series connection, first fuse 111 is connected between IGBT pipe the 121 and the 2nd IGBT pipe 122, second fuse 112 is connected between the 3rd IGBT pipe the 123 and the 4th IGBT pipe 124, the 3rd fuse 113 is connected between the 5th IGBT pipe the 125 and the 6th IGBT pipe 126, the one PWM rectification circuit, the 2nd PWM rectification circuit, the 3rd PWM rectification circuit constitutes the three-phase PWM rectification circuit, the one PWM inverter circuit comprises the 7th IGBT pipe the 141 and the 8th IGBT pipe 142 of mutual series connection, the 2nd PWM inverter circuit comprises that the 9th IGBT pipe the 143 and the tenth IGBT pipe 144, the one PWM inverter circuits and the 2nd PWM inverter circuit of mutual series connection constitute the single-phase PWM inverter circuit.The power cell input is connected to the three-phase PWM rectification circuit through three fuses, three-phase PWM rectification circuit and dc capacitor 131 are formed the energy storage device of power cell, after circuit is connected, six IGBT pipe 121-126 of the control system control three-phase PWM rectification circuit of being made up of testing circuit plate, computing circuit plate and pwm signal generation circuit board give dc capacitor 131 chargings, guarantee the stable of dc capacitor voltage.The output of dc capacitor 131 connects the single-phase PWM inverter circuit, and when falling temporarily appearred in line voltage, four IGBT pipe 141-144 of control system control single-phase PWM inverter circuit produced inversion output.The output of single-phase PWM inverter circuit is connected to the two ends of electronics bypass mechanism 151, and electronics bypass mechanism 151 is made of bidirectional triode thyristor.The output of power cell is received in the output of bidirectional triode thyristor.When jumping appearred in line voltage, four IGBT pipes of control system control 141-144 absorbed voltages and jump, and six IGBT pipe 121-126 by the PWM rectification circuit are with the energy feedback grid.
As shown in Figure 3, the device (shown in Figure 2) in the single power cell is installed in the power cell drawer d.A, b, c are the input plug-in unit that is installed on the power cell drawer, and e, f are the output inserter that is installed on the power cell drawer; A, B, C are the input socket terminal that is installed on the tank bracket, and E, F are the accessory power outlet terminal that is installed on the tank bracket.Machinery bypass machinery is formed J by short circuit copper sheet D, insulated connecting rod G, trace H, rotary handle.By rotation rotary handle J, by trace H and insulated connecting rod G, drive short circuit copper sheet D side-to-side movement, can make short circuit copper sheet D with accessory power outlet terminal E, F short circuit or disconnection.After short circuit copper sheet D is with accessory power outlet terminal E, F short circuit, can under non-stop-machine state, the power cell drawer be extracted out from system.
The utility model is as follows based on the course of work of the 10kV dynamic electric voltage recovery device of cascade of power units:
Testing circuit plate in the control system is converted to digital quantity by voltage sensor and AD (analog digital) chip with the line voltage value, send the data processing plate to by bus, the data processing plate falls detection algorithm by the dynamic electric voltage based on the instantaneous reactive theory line voltage is monitored in real time, when electric network electric voltage drop or projection, the data processing buttress factually the time magnitude of voltage calculate the voltage that needs compensation, control pwm signal generation circuit board produces needed pwm signal, control the IGBT device in each power cell, compensation network voltage.
It is that example describes that the utility model is not shut down following the breaking down with a power cell 35 shown in Figure 1 of the course of work of changing the fault power unit based on the 10kV dynamic electric voltage recovery device of cascade of power units.When power cell 35 breaks down; ten IGBT pipes in the power cell then shown in Figure 2 quit work; electronics bypass mechanism 151 closures in the power cell; main circuit current flows through the electronics bypass mechanism 151 of fault power unit 35; make the element in this power cell break away from main circuit, the 10kV dynamic electric voltage recovery device is not shut down still and can be worked on.At this moment; can be with mechanical bypass mechanism 65 closures of power cell 35 correspondences of fault; electronics bypass mechanism 151 in the power cell 35 of open failure; the power cell and the system of this fault break away from fully; can be under non-stop-machine situation; fault power unit 35 is taken out the power cell 35 that more renews.After new power cell 35 is more finished changing, electronics bypass mechanism 151 in the closed power unit 35, disconnect the mechanical bypass mechanism 65 of power cell 35 correspondences, pass through control system, ten IGBT pipes in the power controlling unit are started working, simultaneously, disconnect the electronics bypass mechanism 151 in the power cell, new power cell is devoted oneself to work.
The utility model power cell is inner to adopt conventional IGBT pipe to constitute PWM rectification circuit and PWM inverter circuit, can realize the energy two-way flow, and during electric network electric voltage drop, power cell can compensate the load-side electric network electric voltage drop from absorbing the electrical network energy; When line voltage jumped, power cell can absorb the voltage that jumps from load-side, feeds back to electrical network by device, and simultaneously, modular design has improved the maintainability of 10kV dynamic electric voltage recovery device; The power cell output cascade also can satisfy the application requirements of 10kV dynamic electric voltage recovery device.The inner three-phase PWM rectification circuit of power cell can reduce the influence of rectification unit to mains by harmonics and power factor (PF); The energy storage device that inner three-phase PWM rectification circuit of power cell and dc capacitor constitute can guarantee line voltage dc capacitor voltage stable when certain limit fluctuate, the compensation ability of raising dynamic electric voltage recovery device.The electronics bypass mechanism that the bidirectional triode thyristor of power cell inside constitutes, can be when power cell breaks down, allow main circuit current flow through through bidirectional triode thyristor, make the element in the fault power unit break away from major loop, when the assurance system breaks down at 1-2 power cell, still can normally move; The mechanical bypass mechanism of outside, fault power unit can be with fault power unit detachment system; What the synergy of electronics bypass mechanism and mechanical bypass mechanism can realize trouble unit does not shut down replacing, has improved the reliability of system.
Though more than described embodiment of the present utility model, but those skilled in the art is to be understood that, these only illustrate, and under the prerequisite that does not deviate from principle of the present utility model and essence, can make numerous variations or modification to these execution modes.Therefore, protection range of the present utility model is limited by appended claims.
Claims (4)
1. 10kV dynamic electric voltage recovery device based on cascade of power units, it is characterized in that, it comprises the many output transformers of single input, 30 power cells, 30 mechanical bypass mechanism, three LC filter circuits, each LC filter circuit is formed by an inductance and a capacitances in series, the many output transformers of single input are transformed to 30 tunnel three-phase voltages of exporting with line voltage, and each road output voltage is connected to the input of one group of power cell; Ten power cells are one group, seal in electrical network through a LC filter circuit after the output cascade of each group power cell, the output of each power cell mechanical bypass mechanism in parallel.
2. the 10kV dynamic electric voltage recovery device based on cascade of power units as claimed in claim 1, it is characterized in that, described power cell comprises first fuse, second fuse, the 3rd fuse, the one PWM rectification circuit, the 2nd PWM rectification circuit, the 3rd PWM rectification circuit, dc capacitor, the one PWM inverter circuit, the 2nd PWM inverter circuit and electronics bypass mechanism, the one PWM rectification circuit comprises the IGBT pipe and the 2nd IGBT pipe of mutual series connection, the 2nd PWM rectification circuit comprises the 3rd IGBT pipe and the 4th IGBT pipe of mutual series connection, the 3rd PWM rectification circuit comprises the 5th IGBT pipe and the 6th IGBT pipe of mutual series connection, first fuse is connected between IGBT pipe and the 2nd IGBT pipe, second fuse is connected between the 3rd IGBT pipe and the 4th IGBT pipe, the 3rd fuse is connected between the 5th IGBT pipe and the 6th IGBT pipe, the one PWM rectification circuit, the 2nd PWM rectification circuit, the 3rd PWM rectification circuit constitutes the three-phase PWM rectification circuit, the one PWM inverter circuit comprises the 7th IGBT pipe and the 8th IGBT pipe of mutual series connection, the 2nd PWM inverter circuit comprises the 9th IGBT pipe and the tenth IGBT pipe of mutual series connection, the one PWM inverter circuit and the 2nd PWM inverter circuit constitute the single-phase PWM inverter circuit, six IGBT pipes of three-phase PWM rectification circuit charge to dc capacitor, the output of dc capacitor connects the single-phase PWM inverter circuit, the output of single-phase PWM inverter circuit is connected to the two ends of electronics bypass mechanism, the electronics bypass mechanism is made of bidirectional triode thyristor, and the output of power cell is received in the output of bidirectional triode thyristor.
3. the 10kV dynamic electric voltage recovery device based on cascade of power units as claimed in claim 2 is characterized in that, described three-phase PWM rectification circuit and dc capacitor are formed the energy storage device of power cell.
4. the 10kV dynamic electric voltage recovery device based on cascade of power units as claimed in claim 1 is characterized in that described mechanical bypass mechanism is made up of short circuit copper sheet, insulated connecting rod, trace, rotary handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201550171U CN201758288U (en) | 2010-04-09 | 2010-04-09 | 10kV dynamic voltage restorer based on power mould cascade connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201550171U CN201758288U (en) | 2010-04-09 | 2010-04-09 | 10kV dynamic voltage restorer based on power mould cascade connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201758288U true CN201758288U (en) | 2011-03-09 |
Family
ID=43645577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201550171U Expired - Lifetime CN201758288U (en) | 2010-04-09 | 2010-04-09 | 10kV dynamic voltage restorer based on power mould cascade connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201758288U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841158A (en) * | 2010-04-09 | 2010-09-22 | 上海电气集团股份有限公司 | 10kV dynamic voltage restorer based on cascade of power units |
| CN112803425A (en) * | 2021-03-29 | 2021-05-14 | 普世通（北京）电气有限公司 | Dynamic voltage compensation device for alternating current-direct current hybrid power distribution network and control method thereof |
-
2010
- 2010-04-09 CN CN2010201550171U patent/CN201758288U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841158A (en) * | 2010-04-09 | 2010-09-22 | 上海电气集团股份有限公司 | 10kV dynamic voltage restorer based on cascade of power units |
| CN112803425A (en) * | 2021-03-29 | 2021-05-14 | 普世通（北京）电气有限公司 | Dynamic voltage compensation device for alternating current-direct current hybrid power distribution network and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101345419B (en) | Series voltage quality regulator and fast investment and cutting method | |
| CN103457283B (en) | A kind of super capacitor dynamic voltage recovery system and power-supply system | |
| CN201611781U (en) | Multipath cascade intelligent capacitor with intelligent compensation | |
| CN103236710B (en) | Adopt the THE UPFC of modular construction | |
| CN102593859A (en) | Three-phase UPQC (Unified Power Quality Controller) topology circuit based on MMC (Multi Media Card) | |
| CN102299523A (en) | Dynamic voltage restorer for three-phase four-line system power distribution network | |
| CA2989539A1 (en) | Hybrid back-to-back direct current transmission system and power flow reversal control method | |
| CN103326385B (en) | Pulverized coal feeder frequency converter control system with low voltage ride-through power supply device | |
| CN103368410B (en) | Traction convertor | |
| CN104979846B (en) | A kind of multi-electrical level inverter low voltage traversing control method, equipment and system | |
| CN201758288U (en) | 10kV dynamic voltage restorer based on power mould cascade connection | |
| CN103915873A (en) | Transformer substation direct-current system based on secondary battery and super capacitor hybrid energy storage | |
| CN101841158A (en) | 10kV dynamic voltage restorer based on cascade of power units | |
| CN102638047A (en) | Three-phase unified power quality control device with bypass switches | |
| CN101882863B (en) | Unit bypass circuit of unit cascaded high-voltage frequency converter | |
| CN103048502B (en) | Control protection system of valve steady-state operation test device of shutoff device | |
| CN209016707U (en) | Large capacity power quality controlling device is pressed in one kind | |
| CN105703376A (en) | Mixed type unified power flow controller | |
| CN202268830U (en) | Magnetic-control voltage-regulating soft starting device of high-voltage AC motor | |
| CN205945149U (en) | A power supply unit for middling pressure circuit breaker cabinet secondary control loop | |
| CN203911481U (en) | Building block heat overlap type active electric power filtering device | |
| CN202281808U (en) | High-power frequency converter load testing apparatus adopting active front end | |
| CN202150819U (en) | Voltage regulating and compensating soft-start device of reactor of high-voltage AC motor | |
| CN105226988A (en) | For power supply and the control method thereof of UPFC converter valve function debugging | |
| CN207098632U (en) | A kind of power distribution network multiterminal flexible interconnection switch based on mixed type submodule MMC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110309 |
|
| CX01 | Expiry of patent term |