CN203871856U - Short circuit-controlled current limiter device - Google Patents
Short circuit-controlled current limiter device Download PDFInfo
- Publication number
- CN203871856U CN203871856U CN201420269608.XU CN201420269608U CN203871856U CN 203871856 U CN203871856 U CN 203871856U CN 201420269608 U CN201420269608 U CN 201420269608U CN 203871856 U CN203871856 U CN 203871856U
- Authority
- CN
- China
- Prior art keywords
- short circuit
- current
- circuit
- limiting reactor
- filter
- 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 - Fee Related
Links
- 238000001914 filtration Methods 0.000 claims description 17
- 230000003068 static effect Effects 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E40/20—Active power filtering [APF]
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a short circuit-controlled current limiter device and belongs to the technical field of power systems. The short circuit-controlled current limiter device comprises a current-limiting reactor serially connected between a power grid system and a user-side load and a filter compensation circuit parallelly connected onto two ends of the current-limiting reactor. The filter compensation circuit adopts a three-phase rectifier bridge with two direct current sides connected, and is equivalent to an active filter plus a static synchronous compensator. When the power grid system operates normally, the short circuit-controlled current limiter device realizes an active filter reactive power compensation function; when the problem of short circuit is detected to happen to the load side, the filter compensation circuit of the device quits operation, the current-limiting reactor Lfcl serially connected in the circuit is equivalent to a large resistor so as to suppress short circuit of system and resist to large current , and the short circuit current level is limited in a range in which a relay protection device can operate reliably and sensitive load equipment is not damaged.
Description
Technical field
The utility model relates to a kind of fault control restrictor apparatus, belongs to technical field of power systems.
Background technology
Along with the development of electric power system and modernization industry, large Power System Interconnection carries out, and the capacity of short circuit of electric power system increases day by day.Improve in order to meet short circuit current the harsher requirement bringing, conventional way is in electrical network, to seal in current limiting reactor.In addition, in the electricity consumption of modern electric load, power electronic technology is more prevalent.Statistics shows, exceedes 50% electric energy and is applied by adjustment or the conversion of Technics of Power Electronic Conversion equipment at least one times.These Technics of Power Electronic Conversion equipment nearly all be unable to do without the application of rectifier.Thereby the harmonic wave that the load of rectification class causes and idle problem have become the subject matter of electric power quality.
Utility model content
The purpose of this utility model is to provide a kind of fault control restrictor apparatus, the harmonic wave and the idle problem that are caused to solve the load of rectification class.
The utility model provides a kind of fault control restrictor apparatus for solving the problems of the technologies described above, this restrictor apparatus comprises for being serially connected in the current limiting reactor between network system and user's lateral load and being attempted by the filtering compensation circuit at current limiting reactor two ends, this filtering compensation circuit comprises two three-phase commutation bridges, two described three phase rectifying bridge DC sides are connected by an electric capacity, the AC of a three-phase commutation bridge is attempted by between current limiting reactor and user's lateral load by LC filter and threephase switch, the AC of another three-phase commutation bridge is attempted by between network system and current limiting reactor.
The beneficial effects of the utility model are: fault control restrictor apparatus of the present utility model comprises for being serially connected in the current limiting reactor between network system and user's lateral load and being attempted by the filtering compensation circuit at current limiting reactor two ends, filtering compensation circuit adopts two three-phase commutation bridges that DC side is connected, this filtering compensation circuit is equivalent to an active filter and adds a STATCOM, when network system is normally moved, fault control restrictor apparatus of the present utility model is realized active filtering reactive power compensation function, and in the time detecting that short circuit problem appears in load-side, the filtering compensation circuit of this device is out of service, be connected on the current limiting reactor L in circuit
fclbe equivalent to large resistance and suppress system short-circuit heavy impulse current, within short circuit current level is limited in to the scope that protective relaying device action message is unlikely to again to damage sensitive load equipment.
Brief description of the drawings
Fig. 1 is the system construction drawing of the utility model fault control restrictor apparatus.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
Fault control restrictor apparatus structure of the present utility model as shown in Figure 1, this device is used for being arranged between electric power system and user's lateral load, to solve the short circuit current problem of user's side, this restrictor apparatus comprises for being serially connected in the current limiting reactor L between network system and user's lateral load
fcland be attempted by current limiting reactor L
fclthe filtering compensation circuit at two ends, this filtering compensation circuit comprises two three-phase commutation bridges, between two three phase rectifying bridge DC sides, connect by an electric capacity, the filtering compensation circuit forming is equivalent to an active filter and adds a STATCOM (APF+STATTCOM), the AC of one of them three-phase commutation bridge is attempted by between current limiting reactor and user's lateral load by LC filter and threephase switch S, and the AC of another three-phase commutation bridge is attempted by between network system and current limiting reactor.Wherein LC filter is for the high order harmonic component of filtering circuit.When network system is normally moved, fault control restrictor apparatus of the present utility model is realized active filtering reactive power compensation function, and in the time detecting that short circuit problem appears in load-side, the full control device block signal of this device is out of service.
The specific works process of this device is as follows: major loop adopts two three-phases online operational mode of PWM rectifier control device control back-to-back, when circuit is normally worked, testing circuit detects voltage or the magnitude of current, be created in compensating signal definite under compensated setpoint strategy by control circuit, form PWM through pwm circuit again and drive signal, go turning on and off of control inverter part by drive circuit, finally by LC filter filtering high order harmonic component, thereby load-side is carried out to Real-Time Filtering and reactive power compensation, make it export good load voltage, in the time that load side is short-circuited fault, S disconnects, install part in parallel out of service, now be connected on the current limiting reactor L in circuit
fclbe equivalent to large resistance and suppress system short-circuit heavy impulse current, within short circuit current level is limited in to the scope that protective relaying device action message is unlikely to again to damage sensitive load equipment.Because line voltage has fluctuation, PWM rectifying part by this device is existing to be become the line voltage of fluctuation into galvanic current and presses, and after processing, obtains stable direct current another mistake and becomes to exchange and make user's side obtain the line voltage of high-quality by filtering and voltage stabilizing.
Claims (1)
1. a fault control restrictor apparatus, it is characterized in that, this restrictor apparatus comprises for being serially connected in the current limiting reactor between network system and user's lateral load and being attempted by the filtering compensation circuit at current limiting reactor two ends, this filtering compensation circuit comprises two three-phase commutation bridges, two described three phase rectifying bridge DC sides are connected by an electric capacity, the AC of a three-phase commutation bridge is attempted by between current limiting reactor and user's lateral load by LC filter and threephase switch, the AC of another three-phase commutation bridge is attempted by between network system and current limiting reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420269608.XU CN203871856U (en) | 2014-05-23 | 2014-05-23 | Short circuit-controlled current limiter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420269608.XU CN203871856U (en) | 2014-05-23 | 2014-05-23 | Short circuit-controlled current limiter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203871856U true CN203871856U (en) | 2014-10-08 |
Family
ID=51652778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420269608.XU Expired - Fee Related CN203871856U (en) | 2014-05-23 | 2014-05-23 | Short circuit-controlled current limiter device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203871856U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065068A (en) * | 2014-05-23 | 2014-09-24 | 国家电网公司 | Short circuit control current limiter device |
-
2014
- 2014-05-23 CN CN201420269608.XU patent/CN203871856U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065068A (en) * | 2014-05-23 | 2014-09-24 | 国家电网公司 | Short circuit control current limiter device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 |